File: | clang/lib/StaticAnalyzer/Core/MemRegion.cpp |
Warning: | line 931, column 36 Called C++ object pointer is null |
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1 | //===- MemRegion.cpp - Abstract memory regions for static analysis --------===// | ||||||
2 | // | ||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||
6 | // | ||||||
7 | //===----------------------------------------------------------------------===// | ||||||
8 | // | ||||||
9 | // This file defines MemRegion and its subclasses. MemRegion defines a | ||||||
10 | // partially-typed abstraction of memory useful for path-sensitive dataflow | ||||||
11 | // analyses. | ||||||
12 | // | ||||||
13 | //===----------------------------------------------------------------------===// | ||||||
14 | |||||||
15 | #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h" | ||||||
16 | #include "clang/AST/ASTContext.h" | ||||||
17 | #include "clang/AST/Attr.h" | ||||||
18 | #include "clang/AST/CharUnits.h" | ||||||
19 | #include "clang/AST/Decl.h" | ||||||
20 | #include "clang/AST/DeclCXX.h" | ||||||
21 | #include "clang/AST/DeclObjC.h" | ||||||
22 | #include "clang/AST/Expr.h" | ||||||
23 | #include "clang/AST/PrettyPrinter.h" | ||||||
24 | #include "clang/AST/RecordLayout.h" | ||||||
25 | #include "clang/AST/Type.h" | ||||||
26 | #include "clang/Analysis/AnalysisDeclContext.h" | ||||||
27 | #include "clang/Analysis/Support/BumpVector.h" | ||||||
28 | #include "clang/Basic/IdentifierTable.h" | ||||||
29 | #include "clang/Basic/LLVM.h" | ||||||
30 | #include "clang/Basic/SourceManager.h" | ||||||
31 | #include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h" | ||||||
32 | #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h" | ||||||
33 | #include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h" | ||||||
34 | #include "llvm/ADT/APInt.h" | ||||||
35 | #include "llvm/ADT/FoldingSet.h" | ||||||
36 | #include "llvm/ADT/Optional.h" | ||||||
37 | #include "llvm/ADT/PointerUnion.h" | ||||||
38 | #include "llvm/ADT/SmallString.h" | ||||||
39 | #include "llvm/ADT/StringRef.h" | ||||||
40 | #include "llvm/ADT/Twine.h" | ||||||
41 | #include "llvm/Support/Allocator.h" | ||||||
42 | #include "llvm/Support/Casting.h" | ||||||
43 | #include "llvm/Support/CheckedArithmetic.h" | ||||||
44 | #include "llvm/Support/Compiler.h" | ||||||
45 | #include "llvm/Support/Debug.h" | ||||||
46 | #include "llvm/Support/ErrorHandling.h" | ||||||
47 | #include "llvm/Support/raw_ostream.h" | ||||||
48 | #include <cassert> | ||||||
49 | #include <cstdint> | ||||||
50 | #include <functional> | ||||||
51 | #include <iterator> | ||||||
52 | #include <string> | ||||||
53 | #include <tuple> | ||||||
54 | #include <utility> | ||||||
55 | |||||||
56 | using namespace clang; | ||||||
57 | using namespace ento; | ||||||
58 | |||||||
59 | #define DEBUG_TYPE"MemRegion" "MemRegion" | ||||||
60 | |||||||
61 | //===----------------------------------------------------------------------===// | ||||||
62 | // MemRegion Construction. | ||||||
63 | //===----------------------------------------------------------------------===// | ||||||
64 | |||||||
65 | template <typename RegionTy, typename SuperTy, typename Arg1Ty> | ||||||
66 | RegionTy* MemRegionManager::getSubRegion(const Arg1Ty arg1, | ||||||
67 | const SuperTy *superRegion) { | ||||||
68 | llvm::FoldingSetNodeID ID; | ||||||
69 | RegionTy::ProfileRegion(ID, arg1, superRegion); | ||||||
70 | void *InsertPos; | ||||||
71 | auto *R = cast_or_null<RegionTy>(Regions.FindNodeOrInsertPos(ID, InsertPos)); | ||||||
72 | |||||||
73 | if (!R) { | ||||||
74 | R = A.Allocate<RegionTy>(); | ||||||
75 | new (R) RegionTy(arg1, superRegion); | ||||||
76 | Regions.InsertNode(R, InsertPos); | ||||||
77 | } | ||||||
78 | |||||||
79 | return R; | ||||||
80 | } | ||||||
81 | |||||||
82 | template <typename RegionTy, typename SuperTy, typename Arg1Ty, typename Arg2Ty> | ||||||
83 | RegionTy* MemRegionManager::getSubRegion(const Arg1Ty arg1, const Arg2Ty arg2, | ||||||
84 | const SuperTy *superRegion) { | ||||||
85 | llvm::FoldingSetNodeID ID; | ||||||
86 | RegionTy::ProfileRegion(ID, arg1, arg2, superRegion); | ||||||
87 | void *InsertPos; | ||||||
88 | auto *R = cast_or_null<RegionTy>(Regions.FindNodeOrInsertPos(ID, InsertPos)); | ||||||
89 | |||||||
90 | if (!R) { | ||||||
91 | R = A.Allocate<RegionTy>(); | ||||||
92 | new (R) RegionTy(arg1, arg2, superRegion); | ||||||
93 | Regions.InsertNode(R, InsertPos); | ||||||
94 | } | ||||||
95 | |||||||
96 | return R; | ||||||
97 | } | ||||||
98 | |||||||
99 | template <typename RegionTy, typename SuperTy, | ||||||
100 | typename Arg1Ty, typename Arg2Ty, typename Arg3Ty> | ||||||
101 | RegionTy* MemRegionManager::getSubRegion(const Arg1Ty arg1, const Arg2Ty arg2, | ||||||
102 | const Arg3Ty arg3, | ||||||
103 | const SuperTy *superRegion) { | ||||||
104 | llvm::FoldingSetNodeID ID; | ||||||
105 | RegionTy::ProfileRegion(ID, arg1, arg2, arg3, superRegion); | ||||||
106 | void *InsertPos; | ||||||
107 | auto *R = cast_or_null<RegionTy>(Regions.FindNodeOrInsertPos(ID, InsertPos)); | ||||||
108 | |||||||
109 | if (!R) { | ||||||
110 | R = A.Allocate<RegionTy>(); | ||||||
111 | new (R) RegionTy(arg1, arg2, arg3, superRegion); | ||||||
112 | Regions.InsertNode(R, InsertPos); | ||||||
113 | } | ||||||
114 | |||||||
115 | return R; | ||||||
116 | } | ||||||
117 | |||||||
118 | //===----------------------------------------------------------------------===// | ||||||
119 | // Object destruction. | ||||||
120 | //===----------------------------------------------------------------------===// | ||||||
121 | |||||||
122 | MemRegion::~MemRegion() = default; | ||||||
123 | |||||||
124 | // All regions and their data are BumpPtrAllocated. No need to call their | ||||||
125 | // destructors. | ||||||
126 | MemRegionManager::~MemRegionManager() = default; | ||||||
127 | |||||||
128 | //===----------------------------------------------------------------------===// | ||||||
129 | // Basic methods. | ||||||
130 | //===----------------------------------------------------------------------===// | ||||||
131 | |||||||
132 | bool SubRegion::isSubRegionOf(const MemRegion* R) const { | ||||||
133 | const MemRegion* r = this; | ||||||
134 | do { | ||||||
135 | if (r == R) | ||||||
136 | return true; | ||||||
137 | if (const auto *sr = dyn_cast<SubRegion>(r)) | ||||||
138 | r = sr->getSuperRegion(); | ||||||
139 | else | ||||||
140 | break; | ||||||
141 | } while (r != nullptr); | ||||||
142 | return false; | ||||||
143 | } | ||||||
144 | |||||||
145 | MemRegionManager &SubRegion::getMemRegionManager() const { | ||||||
146 | const SubRegion* r = this; | ||||||
147 | do { | ||||||
148 | const MemRegion *superRegion = r->getSuperRegion(); | ||||||
149 | if (const auto *sr = dyn_cast<SubRegion>(superRegion)) { | ||||||
150 | r = sr; | ||||||
151 | continue; | ||||||
152 | } | ||||||
153 | return superRegion->getMemRegionManager(); | ||||||
154 | } while (true); | ||||||
155 | } | ||||||
156 | |||||||
157 | const StackFrameContext *VarRegion::getStackFrame() const { | ||||||
158 | const auto *SSR = dyn_cast<StackSpaceRegion>(getMemorySpace()); | ||||||
159 | return SSR ? SSR->getStackFrame() : nullptr; | ||||||
160 | } | ||||||
161 | |||||||
162 | ObjCIvarRegion::ObjCIvarRegion(const ObjCIvarDecl *ivd, const SubRegion *sReg) | ||||||
163 | : DeclRegion(sReg, ObjCIvarRegionKind), IVD(ivd) {} | ||||||
164 | |||||||
165 | const ObjCIvarDecl *ObjCIvarRegion::getDecl() const { return IVD; } | ||||||
166 | |||||||
167 | QualType ObjCIvarRegion::getValueType() const { | ||||||
168 | return getDecl()->getType(); | ||||||
169 | } | ||||||
170 | |||||||
171 | QualType CXXBaseObjectRegion::getValueType() const { | ||||||
172 | return QualType(getDecl()->getTypeForDecl(), 0); | ||||||
173 | } | ||||||
174 | |||||||
175 | QualType CXXDerivedObjectRegion::getValueType() const { | ||||||
176 | return QualType(getDecl()->getTypeForDecl(), 0); | ||||||
177 | } | ||||||
178 | |||||||
179 | QualType ParamVarRegion::getValueType() const { | ||||||
180 | assert(getDecl() &&((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 182, __PRETTY_FUNCTION__)) | ||||||
181 | "`ParamVarRegion` support functions without `Decl` not implemented"((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 182, __PRETTY_FUNCTION__)) | ||||||
182 | " yet.")((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 182, __PRETTY_FUNCTION__)); | ||||||
183 | return getDecl()->getType(); | ||||||
184 | } | ||||||
185 | |||||||
186 | const ParmVarDecl *ParamVarRegion::getDecl() const { | ||||||
187 | const Decl *D = getStackFrame()->getDecl(); | ||||||
188 | |||||||
189 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
190 | assert(Index < FD->param_size())((Index < FD->param_size()) ? static_cast<void> ( 0) : __assert_fail ("Index < FD->param_size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 190, __PRETTY_FUNCTION__)); | ||||||
191 | return FD->parameters()[Index]; | ||||||
192 | } else if (const auto *BD = dyn_cast<BlockDecl>(D)) { | ||||||
193 | assert(Index < BD->param_size())((Index < BD->param_size()) ? static_cast<void> ( 0) : __assert_fail ("Index < BD->param_size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 193, __PRETTY_FUNCTION__)); | ||||||
194 | return BD->parameters()[Index]; | ||||||
195 | } else if (const auto *MD = dyn_cast<ObjCMethodDecl>(D)) { | ||||||
196 | assert(Index < MD->param_size())((Index < MD->param_size()) ? static_cast<void> ( 0) : __assert_fail ("Index < MD->param_size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 196, __PRETTY_FUNCTION__)); | ||||||
197 | return MD->parameters()[Index]; | ||||||
198 | } else if (const auto *CD = dyn_cast<CXXConstructorDecl>(D)) { | ||||||
199 | assert(Index < CD->param_size())((Index < CD->param_size()) ? static_cast<void> ( 0) : __assert_fail ("Index < CD->param_size()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 199, __PRETTY_FUNCTION__)); | ||||||
200 | return CD->parameters()[Index]; | ||||||
201 | } else { | ||||||
202 | llvm_unreachable("Unexpected Decl kind!")::llvm::llvm_unreachable_internal("Unexpected Decl kind!", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 202); | ||||||
203 | } | ||||||
204 | } | ||||||
205 | |||||||
206 | //===----------------------------------------------------------------------===// | ||||||
207 | // FoldingSet profiling. | ||||||
208 | //===----------------------------------------------------------------------===// | ||||||
209 | |||||||
210 | void MemSpaceRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
211 | ID.AddInteger(static_cast<unsigned>(getKind())); | ||||||
212 | } | ||||||
213 | |||||||
214 | void StackSpaceRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
215 | ID.AddInteger(static_cast<unsigned>(getKind())); | ||||||
216 | ID.AddPointer(getStackFrame()); | ||||||
217 | } | ||||||
218 | |||||||
219 | void StaticGlobalSpaceRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
220 | ID.AddInteger(static_cast<unsigned>(getKind())); | ||||||
221 | ID.AddPointer(getCodeRegion()); | ||||||
222 | } | ||||||
223 | |||||||
224 | void StringRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
225 | const StringLiteral *Str, | ||||||
226 | const MemRegion *superRegion) { | ||||||
227 | ID.AddInteger(static_cast<unsigned>(StringRegionKind)); | ||||||
228 | ID.AddPointer(Str); | ||||||
229 | ID.AddPointer(superRegion); | ||||||
230 | } | ||||||
231 | |||||||
232 | void ObjCStringRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
233 | const ObjCStringLiteral *Str, | ||||||
234 | const MemRegion *superRegion) { | ||||||
235 | ID.AddInteger(static_cast<unsigned>(ObjCStringRegionKind)); | ||||||
236 | ID.AddPointer(Str); | ||||||
237 | ID.AddPointer(superRegion); | ||||||
238 | } | ||||||
239 | |||||||
240 | void AllocaRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
241 | const Expr *Ex, unsigned cnt, | ||||||
242 | const MemRegion *superRegion) { | ||||||
243 | ID.AddInteger(static_cast<unsigned>(AllocaRegionKind)); | ||||||
244 | ID.AddPointer(Ex); | ||||||
245 | ID.AddInteger(cnt); | ||||||
246 | ID.AddPointer(superRegion); | ||||||
247 | } | ||||||
248 | |||||||
249 | void AllocaRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
250 | ProfileRegion(ID, Ex, Cnt, superRegion); | ||||||
251 | } | ||||||
252 | |||||||
253 | void CompoundLiteralRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
254 | CompoundLiteralRegion::ProfileRegion(ID, CL, superRegion); | ||||||
255 | } | ||||||
256 | |||||||
257 | void CompoundLiteralRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
258 | const CompoundLiteralExpr *CL, | ||||||
259 | const MemRegion* superRegion) { | ||||||
260 | ID.AddInteger(static_cast<unsigned>(CompoundLiteralRegionKind)); | ||||||
261 | ID.AddPointer(CL); | ||||||
262 | ID.AddPointer(superRegion); | ||||||
263 | } | ||||||
264 | |||||||
265 | void CXXThisRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
266 | const PointerType *PT, | ||||||
267 | const MemRegion *sRegion) { | ||||||
268 | ID.AddInteger(static_cast<unsigned>(CXXThisRegionKind)); | ||||||
269 | ID.AddPointer(PT); | ||||||
270 | ID.AddPointer(sRegion); | ||||||
271 | } | ||||||
272 | |||||||
273 | void CXXThisRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
274 | CXXThisRegion::ProfileRegion(ID, ThisPointerTy, superRegion); | ||||||
275 | } | ||||||
276 | |||||||
277 | void FieldRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
278 | ProfileRegion(ID, getDecl(), superRegion); | ||||||
279 | } | ||||||
280 | |||||||
281 | void ObjCIvarRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
282 | const ObjCIvarDecl *ivd, | ||||||
283 | const MemRegion* superRegion) { | ||||||
284 | ID.AddInteger(static_cast<unsigned>(ObjCIvarRegionKind)); | ||||||
285 | ID.AddPointer(ivd); | ||||||
286 | ID.AddPointer(superRegion); | ||||||
287 | } | ||||||
288 | |||||||
289 | void ObjCIvarRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
290 | ProfileRegion(ID, getDecl(), superRegion); | ||||||
291 | } | ||||||
292 | |||||||
293 | void NonParamVarRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
294 | const VarDecl *VD, | ||||||
295 | const MemRegion *superRegion) { | ||||||
296 | ID.AddInteger(static_cast<unsigned>(NonParamVarRegionKind)); | ||||||
297 | ID.AddPointer(VD); | ||||||
298 | ID.AddPointer(superRegion); | ||||||
299 | } | ||||||
300 | |||||||
301 | void NonParamVarRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
302 | ProfileRegion(ID, getDecl(), superRegion); | ||||||
303 | } | ||||||
304 | |||||||
305 | void ParamVarRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, const Expr *OE, | ||||||
306 | unsigned Idx, const MemRegion *SReg) { | ||||||
307 | ID.AddInteger(static_cast<unsigned>(ParamVarRegionKind)); | ||||||
308 | ID.AddPointer(OE); | ||||||
309 | ID.AddInteger(Idx); | ||||||
310 | ID.AddPointer(SReg); | ||||||
311 | } | ||||||
312 | |||||||
313 | void ParamVarRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
314 | ProfileRegion(ID, getOriginExpr(), getIndex(), superRegion); | ||||||
315 | } | ||||||
316 | |||||||
317 | void SymbolicRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, SymbolRef sym, | ||||||
318 | const MemRegion *sreg) { | ||||||
319 | ID.AddInteger(static_cast<unsigned>(MemRegion::SymbolicRegionKind)); | ||||||
320 | ID.Add(sym); | ||||||
321 | ID.AddPointer(sreg); | ||||||
322 | } | ||||||
323 | |||||||
324 | void SymbolicRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
325 | SymbolicRegion::ProfileRegion(ID, sym, getSuperRegion()); | ||||||
326 | } | ||||||
327 | |||||||
328 | void ElementRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
329 | QualType ElementType, SVal Idx, | ||||||
330 | const MemRegion* superRegion) { | ||||||
331 | ID.AddInteger(MemRegion::ElementRegionKind); | ||||||
332 | ID.Add(ElementType); | ||||||
333 | ID.AddPointer(superRegion); | ||||||
334 | Idx.Profile(ID); | ||||||
335 | } | ||||||
336 | |||||||
337 | void ElementRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
338 | ElementRegion::ProfileRegion(ID, ElementType, Index, superRegion); | ||||||
339 | } | ||||||
340 | |||||||
341 | void FunctionCodeRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
342 | const NamedDecl *FD, | ||||||
343 | const MemRegion*) { | ||||||
344 | ID.AddInteger(MemRegion::FunctionCodeRegionKind); | ||||||
345 | ID.AddPointer(FD); | ||||||
346 | } | ||||||
347 | |||||||
348 | void FunctionCodeRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
349 | FunctionCodeRegion::ProfileRegion(ID, FD, superRegion); | ||||||
350 | } | ||||||
351 | |||||||
352 | void BlockCodeRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
353 | const BlockDecl *BD, CanQualType, | ||||||
354 | const AnalysisDeclContext *AC, | ||||||
355 | const MemRegion*) { | ||||||
356 | ID.AddInteger(MemRegion::BlockCodeRegionKind); | ||||||
357 | ID.AddPointer(BD); | ||||||
358 | } | ||||||
359 | |||||||
360 | void BlockCodeRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
361 | BlockCodeRegion::ProfileRegion(ID, BD, locTy, AC, superRegion); | ||||||
362 | } | ||||||
363 | |||||||
364 | void BlockDataRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, | ||||||
365 | const BlockCodeRegion *BC, | ||||||
366 | const LocationContext *LC, | ||||||
367 | unsigned BlkCount, | ||||||
368 | const MemRegion *sReg) { | ||||||
369 | ID.AddInteger(MemRegion::BlockDataRegionKind); | ||||||
370 | ID.AddPointer(BC); | ||||||
371 | ID.AddPointer(LC); | ||||||
372 | ID.AddInteger(BlkCount); | ||||||
373 | ID.AddPointer(sReg); | ||||||
374 | } | ||||||
375 | |||||||
376 | void BlockDataRegion::Profile(llvm::FoldingSetNodeID& ID) const { | ||||||
377 | BlockDataRegion::ProfileRegion(ID, BC, LC, BlockCount, getSuperRegion()); | ||||||
378 | } | ||||||
379 | |||||||
380 | void CXXTempObjectRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
381 | Expr const *Ex, | ||||||
382 | const MemRegion *sReg) { | ||||||
383 | ID.AddPointer(Ex); | ||||||
384 | ID.AddPointer(sReg); | ||||||
385 | } | ||||||
386 | |||||||
387 | void CXXTempObjectRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
388 | ProfileRegion(ID, Ex, getSuperRegion()); | ||||||
389 | } | ||||||
390 | |||||||
391 | void CXXBaseObjectRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
392 | const CXXRecordDecl *RD, | ||||||
393 | bool IsVirtual, | ||||||
394 | const MemRegion *SReg) { | ||||||
395 | ID.AddPointer(RD); | ||||||
396 | ID.AddBoolean(IsVirtual); | ||||||
397 | ID.AddPointer(SReg); | ||||||
398 | } | ||||||
399 | |||||||
400 | void CXXBaseObjectRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
401 | ProfileRegion(ID, getDecl(), isVirtual(), superRegion); | ||||||
402 | } | ||||||
403 | |||||||
404 | void CXXDerivedObjectRegion::ProfileRegion(llvm::FoldingSetNodeID &ID, | ||||||
405 | const CXXRecordDecl *RD, | ||||||
406 | const MemRegion *SReg) { | ||||||
407 | ID.AddPointer(RD); | ||||||
408 | ID.AddPointer(SReg); | ||||||
409 | } | ||||||
410 | |||||||
411 | void CXXDerivedObjectRegion::Profile(llvm::FoldingSetNodeID &ID) const { | ||||||
412 | ProfileRegion(ID, getDecl(), superRegion); | ||||||
413 | } | ||||||
414 | |||||||
415 | //===----------------------------------------------------------------------===// | ||||||
416 | // Region anchors. | ||||||
417 | //===----------------------------------------------------------------------===// | ||||||
418 | |||||||
419 | void GlobalsSpaceRegion::anchor() {} | ||||||
420 | |||||||
421 | void NonStaticGlobalSpaceRegion::anchor() {} | ||||||
422 | |||||||
423 | void StackSpaceRegion::anchor() {} | ||||||
424 | |||||||
425 | void TypedRegion::anchor() {} | ||||||
426 | |||||||
427 | void TypedValueRegion::anchor() {} | ||||||
428 | |||||||
429 | void CodeTextRegion::anchor() {} | ||||||
430 | |||||||
431 | void SubRegion::anchor() {} | ||||||
432 | |||||||
433 | //===----------------------------------------------------------------------===// | ||||||
434 | // Region pretty-printing. | ||||||
435 | //===----------------------------------------------------------------------===// | ||||||
436 | |||||||
437 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void MemRegion::dump() const { | ||||||
438 | dumpToStream(llvm::errs()); | ||||||
439 | } | ||||||
440 | |||||||
441 | std::string MemRegion::getString() const { | ||||||
442 | std::string s; | ||||||
443 | llvm::raw_string_ostream os(s); | ||||||
444 | dumpToStream(os); | ||||||
445 | return os.str(); | ||||||
446 | } | ||||||
447 | |||||||
448 | void MemRegion::dumpToStream(raw_ostream &os) const { | ||||||
449 | os << "<Unknown Region>"; | ||||||
450 | } | ||||||
451 | |||||||
452 | void AllocaRegion::dumpToStream(raw_ostream &os) const { | ||||||
453 | os << "alloca{S" << Ex->getID(getContext()) << ',' << Cnt << '}'; | ||||||
454 | } | ||||||
455 | |||||||
456 | void FunctionCodeRegion::dumpToStream(raw_ostream &os) const { | ||||||
457 | os << "code{" << getDecl()->getDeclName().getAsString() << '}'; | ||||||
458 | } | ||||||
459 | |||||||
460 | void BlockCodeRegion::dumpToStream(raw_ostream &os) const { | ||||||
461 | os << "block_code{" << static_cast<const void *>(this) << '}'; | ||||||
462 | } | ||||||
463 | |||||||
464 | void BlockDataRegion::dumpToStream(raw_ostream &os) const { | ||||||
465 | os << "block_data{" << BC; | ||||||
466 | os << "; "; | ||||||
467 | for (BlockDataRegion::referenced_vars_iterator | ||||||
468 | I = referenced_vars_begin(), | ||||||
469 | E = referenced_vars_end(); I != E; ++I) | ||||||
470 | os << "(" << I.getCapturedRegion() << "<-" << | ||||||
471 | I.getOriginalRegion() << ") "; | ||||||
472 | os << '}'; | ||||||
473 | } | ||||||
474 | |||||||
475 | void CompoundLiteralRegion::dumpToStream(raw_ostream &os) const { | ||||||
476 | // FIXME: More elaborate pretty-printing. | ||||||
477 | os << "{ S" << CL->getID(getContext()) << " }"; | ||||||
478 | } | ||||||
479 | |||||||
480 | void CXXTempObjectRegion::dumpToStream(raw_ostream &os) const { | ||||||
481 | os << "temp_object{" << getValueType().getAsString() << ", " | ||||||
482 | << "S" << Ex->getID(getContext()) << '}'; | ||||||
483 | } | ||||||
484 | |||||||
485 | void CXXBaseObjectRegion::dumpToStream(raw_ostream &os) const { | ||||||
486 | os << "Base{" << superRegion << ',' << getDecl()->getName() << '}'; | ||||||
487 | } | ||||||
488 | |||||||
489 | void CXXDerivedObjectRegion::dumpToStream(raw_ostream &os) const { | ||||||
490 | os << "Derived{" << superRegion << ',' << getDecl()->getName() << '}'; | ||||||
491 | } | ||||||
492 | |||||||
493 | void CXXThisRegion::dumpToStream(raw_ostream &os) const { | ||||||
494 | os << "this"; | ||||||
495 | } | ||||||
496 | |||||||
497 | void ElementRegion::dumpToStream(raw_ostream &os) const { | ||||||
498 | os << "Element{" << superRegion << ',' | ||||||
499 | << Index << ',' << getElementType().getAsString() << '}'; | ||||||
500 | } | ||||||
501 | |||||||
502 | void FieldRegion::dumpToStream(raw_ostream &os) const { | ||||||
503 | os << superRegion << "." << *getDecl(); | ||||||
504 | } | ||||||
505 | |||||||
506 | void ObjCIvarRegion::dumpToStream(raw_ostream &os) const { | ||||||
507 | os << "Ivar{" << superRegion << ',' << *getDecl() << '}'; | ||||||
508 | } | ||||||
509 | |||||||
510 | void StringRegion::dumpToStream(raw_ostream &os) const { | ||||||
511 | assert(Str != nullptr && "Expecting non-null StringLiteral")((Str != nullptr && "Expecting non-null StringLiteral" ) ? static_cast<void> (0) : __assert_fail ("Str != nullptr && \"Expecting non-null StringLiteral\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 511, __PRETTY_FUNCTION__)); | ||||||
512 | Str->printPretty(os, nullptr, PrintingPolicy(getContext().getLangOpts())); | ||||||
513 | } | ||||||
514 | |||||||
515 | void ObjCStringRegion::dumpToStream(raw_ostream &os) const { | ||||||
516 | assert(Str != nullptr && "Expecting non-null ObjCStringLiteral")((Str != nullptr && "Expecting non-null ObjCStringLiteral" ) ? static_cast<void> (0) : __assert_fail ("Str != nullptr && \"Expecting non-null ObjCStringLiteral\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 516, __PRETTY_FUNCTION__)); | ||||||
517 | Str->printPretty(os, nullptr, PrintingPolicy(getContext().getLangOpts())); | ||||||
518 | } | ||||||
519 | |||||||
520 | void SymbolicRegion::dumpToStream(raw_ostream &os) const { | ||||||
521 | if (isa<HeapSpaceRegion>(getSuperRegion())) | ||||||
522 | os << "Heap"; | ||||||
523 | os << "SymRegion{" << sym << '}'; | ||||||
524 | } | ||||||
525 | |||||||
526 | void NonParamVarRegion::dumpToStream(raw_ostream &os) const { | ||||||
527 | if (const IdentifierInfo *ID = VD->getIdentifier()) | ||||||
528 | os << ID->getName(); | ||||||
529 | else | ||||||
530 | os << "NonParamVarRegion{D" << VD->getID() << '}'; | ||||||
531 | } | ||||||
532 | |||||||
533 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void RegionRawOffset::dump() const { | ||||||
534 | dumpToStream(llvm::errs()); | ||||||
535 | } | ||||||
536 | |||||||
537 | void RegionRawOffset::dumpToStream(raw_ostream &os) const { | ||||||
538 | os << "raw_offset{" << getRegion() << ',' << getOffset().getQuantity() << '}'; | ||||||
539 | } | ||||||
540 | |||||||
541 | void CodeSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
542 | os << "CodeSpaceRegion"; | ||||||
543 | } | ||||||
544 | |||||||
545 | void StaticGlobalSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
546 | os << "StaticGlobalsMemSpace{" << CR << '}'; | ||||||
547 | } | ||||||
548 | |||||||
549 | void GlobalInternalSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
550 | os << "GlobalInternalSpaceRegion"; | ||||||
551 | } | ||||||
552 | |||||||
553 | void GlobalSystemSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
554 | os << "GlobalSystemSpaceRegion"; | ||||||
555 | } | ||||||
556 | |||||||
557 | void GlobalImmutableSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
558 | os << "GlobalImmutableSpaceRegion"; | ||||||
559 | } | ||||||
560 | |||||||
561 | void HeapSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
562 | os << "HeapSpaceRegion"; | ||||||
563 | } | ||||||
564 | |||||||
565 | void UnknownSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
566 | os << "UnknownSpaceRegion"; | ||||||
567 | } | ||||||
568 | |||||||
569 | void StackArgumentsSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
570 | os << "StackArgumentsSpaceRegion"; | ||||||
571 | } | ||||||
572 | |||||||
573 | void StackLocalsSpaceRegion::dumpToStream(raw_ostream &os) const { | ||||||
574 | os << "StackLocalsSpaceRegion"; | ||||||
575 | } | ||||||
576 | |||||||
577 | void ParamVarRegion::dumpToStream(raw_ostream &os) const { | ||||||
578 | const ParmVarDecl *PVD = getDecl(); | ||||||
579 | assert(PVD &&((PVD && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("PVD && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 581, __PRETTY_FUNCTION__)) | ||||||
580 | "`ParamVarRegion` support functions without `Decl` not implemented"((PVD && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("PVD && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 581, __PRETTY_FUNCTION__)) | ||||||
581 | " yet.")((PVD && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("PVD && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 581, __PRETTY_FUNCTION__)); | ||||||
582 | if (const IdentifierInfo *ID = PVD->getIdentifier()) { | ||||||
583 | os << ID->getName(); | ||||||
584 | } else { | ||||||
585 | os << "ParamVarRegion{P" << PVD->getID() << '}'; | ||||||
586 | } | ||||||
587 | } | ||||||
588 | |||||||
589 | bool MemRegion::canPrintPretty() const { | ||||||
590 | return canPrintPrettyAsExpr(); | ||||||
591 | } | ||||||
592 | |||||||
593 | bool MemRegion::canPrintPrettyAsExpr() const { | ||||||
594 | return false; | ||||||
595 | } | ||||||
596 | |||||||
597 | void MemRegion::printPretty(raw_ostream &os) const { | ||||||
598 | assert(canPrintPretty() && "This region cannot be printed pretty.")((canPrintPretty() && "This region cannot be printed pretty." ) ? static_cast<void> (0) : __assert_fail ("canPrintPretty() && \"This region cannot be printed pretty.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 598, __PRETTY_FUNCTION__)); | ||||||
599 | os << "'"; | ||||||
600 | printPrettyAsExpr(os); | ||||||
601 | os << "'"; | ||||||
602 | } | ||||||
603 | |||||||
604 | void MemRegion::printPrettyAsExpr(raw_ostream &) const { | ||||||
605 | llvm_unreachable("This region cannot be printed pretty.")::llvm::llvm_unreachable_internal("This region cannot be printed pretty." , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 605); | ||||||
606 | } | ||||||
607 | |||||||
608 | bool NonParamVarRegion::canPrintPrettyAsExpr() const { return true; } | ||||||
609 | |||||||
610 | void NonParamVarRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
611 | os << getDecl()->getName(); | ||||||
612 | } | ||||||
613 | |||||||
614 | bool ParamVarRegion::canPrintPrettyAsExpr() const { return true; } | ||||||
615 | |||||||
616 | void ParamVarRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
617 | assert(getDecl() &&((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 619, __PRETTY_FUNCTION__)) | ||||||
618 | "`ParamVarRegion` support functions without `Decl` not implemented"((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 619, __PRETTY_FUNCTION__)) | ||||||
619 | " yet.")((getDecl() && "`ParamVarRegion` support functions without `Decl` not implemented" " yet.") ? static_cast<void> (0) : __assert_fail ("getDecl() && \"`ParamVarRegion` support functions without `Decl` not implemented\" \" yet.\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 619, __PRETTY_FUNCTION__)); | ||||||
620 | os << getDecl()->getName(); | ||||||
621 | } | ||||||
622 | |||||||
623 | bool ObjCIvarRegion::canPrintPrettyAsExpr() const { | ||||||
624 | return true; | ||||||
625 | } | ||||||
626 | |||||||
627 | void ObjCIvarRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
628 | os << getDecl()->getName(); | ||||||
629 | } | ||||||
630 | |||||||
631 | bool FieldRegion::canPrintPretty() const { | ||||||
632 | return true; | ||||||
633 | } | ||||||
634 | |||||||
635 | bool FieldRegion::canPrintPrettyAsExpr() const { | ||||||
636 | return superRegion->canPrintPrettyAsExpr(); | ||||||
637 | } | ||||||
638 | |||||||
639 | void FieldRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
640 | assert(canPrintPrettyAsExpr())((canPrintPrettyAsExpr()) ? static_cast<void> (0) : __assert_fail ("canPrintPrettyAsExpr()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 640, __PRETTY_FUNCTION__)); | ||||||
641 | superRegion->printPrettyAsExpr(os); | ||||||
642 | os << "." << getDecl()->getName(); | ||||||
643 | } | ||||||
644 | |||||||
645 | void FieldRegion::printPretty(raw_ostream &os) const { | ||||||
646 | if (canPrintPrettyAsExpr()) { | ||||||
647 | os << "\'"; | ||||||
648 | printPrettyAsExpr(os); | ||||||
649 | os << "'"; | ||||||
650 | } else { | ||||||
651 | os << "field " << "\'" << getDecl()->getName() << "'"; | ||||||
652 | } | ||||||
653 | } | ||||||
654 | |||||||
655 | bool CXXBaseObjectRegion::canPrintPrettyAsExpr() const { | ||||||
656 | return superRegion->canPrintPrettyAsExpr(); | ||||||
657 | } | ||||||
658 | |||||||
659 | void CXXBaseObjectRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
660 | superRegion->printPrettyAsExpr(os); | ||||||
661 | } | ||||||
662 | |||||||
663 | bool CXXDerivedObjectRegion::canPrintPrettyAsExpr() const { | ||||||
664 | return superRegion->canPrintPrettyAsExpr(); | ||||||
665 | } | ||||||
666 | |||||||
667 | void CXXDerivedObjectRegion::printPrettyAsExpr(raw_ostream &os) const { | ||||||
668 | superRegion->printPrettyAsExpr(os); | ||||||
669 | } | ||||||
670 | |||||||
671 | std::string MemRegion::getDescriptiveName(bool UseQuotes) const { | ||||||
672 | std::string VariableName; | ||||||
673 | std::string ArrayIndices; | ||||||
674 | const MemRegion *R = this; | ||||||
675 | SmallString<50> buf; | ||||||
676 | llvm::raw_svector_ostream os(buf); | ||||||
677 | |||||||
678 | // Obtain array indices to add them to the variable name. | ||||||
679 | const ElementRegion *ER = nullptr; | ||||||
680 | while ((ER = R->getAs<ElementRegion>())) { | ||||||
681 | // Index is a ConcreteInt. | ||||||
682 | if (auto CI = ER->getIndex().getAs<nonloc::ConcreteInt>()) { | ||||||
683 | llvm::SmallString<2> Idx; | ||||||
684 | CI->getValue().toString(Idx); | ||||||
685 | ArrayIndices = (llvm::Twine("[") + Idx.str() + "]" + ArrayIndices).str(); | ||||||
686 | } | ||||||
687 | // If not a ConcreteInt, try to obtain the variable | ||||||
688 | // name by calling 'getDescriptiveName' recursively. | ||||||
689 | else { | ||||||
690 | std::string Idx = ER->getDescriptiveName(false); | ||||||
691 | if (!Idx.empty()) { | ||||||
692 | ArrayIndices = (llvm::Twine("[") + Idx + "]" + ArrayIndices).str(); | ||||||
693 | } | ||||||
694 | } | ||||||
695 | R = ER->getSuperRegion(); | ||||||
696 | } | ||||||
697 | |||||||
698 | // Get variable name. | ||||||
699 | if (R && R->canPrintPrettyAsExpr()) { | ||||||
700 | R->printPrettyAsExpr(os); | ||||||
701 | if (UseQuotes) | ||||||
702 | return (llvm::Twine("'") + os.str() + ArrayIndices + "'").str(); | ||||||
703 | else | ||||||
704 | return (llvm::Twine(os.str()) + ArrayIndices).str(); | ||||||
705 | } | ||||||
706 | |||||||
707 | return VariableName; | ||||||
708 | } | ||||||
709 | |||||||
710 | SourceRange MemRegion::sourceRange() const { | ||||||
711 | const auto *const VR = dyn_cast<VarRegion>(this->getBaseRegion()); | ||||||
712 | const auto *const FR = dyn_cast<FieldRegion>(this); | ||||||
713 | |||||||
714 | // Check for more specific regions first. | ||||||
715 | // FieldRegion | ||||||
716 | if (FR) { | ||||||
717 | return FR->getDecl()->getSourceRange(); | ||||||
718 | } | ||||||
719 | // VarRegion | ||||||
720 | else if (VR) { | ||||||
721 | return VR->getDecl()->getSourceRange(); | ||||||
722 | } | ||||||
723 | // Return invalid source range (can be checked by client). | ||||||
724 | else | ||||||
725 | return {}; | ||||||
726 | } | ||||||
727 | |||||||
728 | //===----------------------------------------------------------------------===// | ||||||
729 | // MemRegionManager methods. | ||||||
730 | //===----------------------------------------------------------------------===// | ||||||
731 | |||||||
732 | static DefinedOrUnknownSVal getTypeSize(QualType Ty, ASTContext &Ctx, | ||||||
733 | SValBuilder &SVB) { | ||||||
734 | CharUnits Size = Ctx.getTypeSizeInChars(Ty); | ||||||
735 | QualType SizeTy = SVB.getArrayIndexType(); | ||||||
736 | return SVB.makeIntVal(Size.getQuantity(), SizeTy); | ||||||
737 | } | ||||||
738 | |||||||
739 | DefinedOrUnknownSVal MemRegionManager::getStaticSize(const MemRegion *MR, | ||||||
740 | SValBuilder &SVB) const { | ||||||
741 | const auto *SR = cast<SubRegion>(MR); | ||||||
742 | SymbolManager &SymMgr = SVB.getSymbolManager(); | ||||||
743 | |||||||
744 | switch (SR->getKind()) { | ||||||
745 | case MemRegion::AllocaRegionKind: | ||||||
746 | case MemRegion::SymbolicRegionKind: | ||||||
747 | return nonloc::SymbolVal(SymMgr.getExtentSymbol(SR)); | ||||||
748 | case MemRegion::StringRegionKind: | ||||||
749 | return SVB.makeIntVal( | ||||||
750 | cast<StringRegion>(SR)->getStringLiteral()->getByteLength() + 1, | ||||||
751 | SVB.getArrayIndexType()); | ||||||
752 | case MemRegion::CompoundLiteralRegionKind: | ||||||
753 | case MemRegion::CXXBaseObjectRegionKind: | ||||||
754 | case MemRegion::CXXDerivedObjectRegionKind: | ||||||
755 | case MemRegion::CXXTempObjectRegionKind: | ||||||
756 | case MemRegion::CXXThisRegionKind: | ||||||
757 | case MemRegion::ObjCIvarRegionKind: | ||||||
758 | case MemRegion::NonParamVarRegionKind: | ||||||
759 | case MemRegion::ParamVarRegionKind: | ||||||
760 | case MemRegion::ElementRegionKind: | ||||||
761 | case MemRegion::ObjCStringRegionKind: { | ||||||
762 | QualType Ty = cast<TypedValueRegion>(SR)->getDesugaredValueType(Ctx); | ||||||
763 | if (isa<VariableArrayType>(Ty)) | ||||||
764 | return nonloc::SymbolVal(SymMgr.getExtentSymbol(SR)); | ||||||
765 | |||||||
766 | if (Ty->isIncompleteType()) | ||||||
767 | return UnknownVal(); | ||||||
768 | |||||||
769 | return getTypeSize(Ty, Ctx, SVB); | ||||||
770 | } | ||||||
771 | case MemRegion::FieldRegionKind: { | ||||||
772 | // Force callers to deal with bitfields explicitly. | ||||||
773 | if (cast<FieldRegion>(SR)->getDecl()->isBitField()) | ||||||
774 | return UnknownVal(); | ||||||
775 | |||||||
776 | QualType Ty = cast<TypedValueRegion>(SR)->getDesugaredValueType(Ctx); | ||||||
777 | DefinedOrUnknownSVal Size = getTypeSize(Ty, Ctx, SVB); | ||||||
778 | |||||||
779 | // A zero-length array at the end of a struct often stands for dynamically | ||||||
780 | // allocated extra memory. | ||||||
781 | if (Size.isZeroConstant()) { | ||||||
782 | if (isa<ConstantArrayType>(Ty)) | ||||||
783 | return UnknownVal(); | ||||||
784 | } | ||||||
785 | |||||||
786 | return Size; | ||||||
787 | } | ||||||
788 | // FIXME: The following are being used in 'SimpleSValBuilder' and in | ||||||
789 | // 'ArrayBoundChecker::checkLocation' because there is no symbol to | ||||||
790 | // represent the regions more appropriately. | ||||||
791 | case MemRegion::BlockDataRegionKind: | ||||||
792 | case MemRegion::BlockCodeRegionKind: | ||||||
793 | case MemRegion::FunctionCodeRegionKind: | ||||||
794 | return nonloc::SymbolVal(SymMgr.getExtentSymbol(SR)); | ||||||
795 | default: | ||||||
796 | llvm_unreachable("Unhandled region")::llvm::llvm_unreachable_internal("Unhandled region", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 796); | ||||||
797 | } | ||||||
798 | } | ||||||
799 | |||||||
800 | template <typename REG> | ||||||
801 | const REG *MemRegionManager::LazyAllocate(REG*& region) { | ||||||
802 | if (!region) { | ||||||
803 | region = A.Allocate<REG>(); | ||||||
804 | new (region) REG(*this); | ||||||
805 | } | ||||||
806 | |||||||
807 | return region; | ||||||
808 | } | ||||||
809 | |||||||
810 | template <typename REG, typename ARG> | ||||||
811 | const REG *MemRegionManager::LazyAllocate(REG*& region, ARG a) { | ||||||
812 | if (!region) { | ||||||
813 | region = A.Allocate<REG>(); | ||||||
814 | new (region) REG(this, a); | ||||||
815 | } | ||||||
816 | |||||||
817 | return region; | ||||||
818 | } | ||||||
819 | |||||||
820 | const StackLocalsSpaceRegion* | ||||||
821 | MemRegionManager::getStackLocalsRegion(const StackFrameContext *STC) { | ||||||
822 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 822, __PRETTY_FUNCTION__)); | ||||||
823 | StackLocalsSpaceRegion *&R = StackLocalsSpaceRegions[STC]; | ||||||
824 | |||||||
825 | if (R) | ||||||
826 | return R; | ||||||
827 | |||||||
828 | R = A.Allocate<StackLocalsSpaceRegion>(); | ||||||
829 | new (R) StackLocalsSpaceRegion(*this, STC); | ||||||
830 | return R; | ||||||
831 | } | ||||||
832 | |||||||
833 | const StackArgumentsSpaceRegion * | ||||||
834 | MemRegionManager::getStackArgumentsRegion(const StackFrameContext *STC) { | ||||||
835 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 835, __PRETTY_FUNCTION__)); | ||||||
836 | StackArgumentsSpaceRegion *&R = StackArgumentsSpaceRegions[STC]; | ||||||
837 | |||||||
838 | if (R) | ||||||
839 | return R; | ||||||
840 | |||||||
841 | R = A.Allocate<StackArgumentsSpaceRegion>(); | ||||||
842 | new (R) StackArgumentsSpaceRegion(*this, STC); | ||||||
843 | return R; | ||||||
844 | } | ||||||
845 | |||||||
846 | const GlobalsSpaceRegion | ||||||
847 | *MemRegionManager::getGlobalsRegion(MemRegion::Kind K, | ||||||
848 | const CodeTextRegion *CR) { | ||||||
849 | if (!CR) { | ||||||
850 | if (K == MemRegion::GlobalSystemSpaceRegionKind) | ||||||
851 | return LazyAllocate(SystemGlobals); | ||||||
852 | if (K == MemRegion::GlobalImmutableSpaceRegionKind) | ||||||
853 | return LazyAllocate(ImmutableGlobals); | ||||||
854 | assert(K == MemRegion::GlobalInternalSpaceRegionKind)((K == MemRegion::GlobalInternalSpaceRegionKind) ? static_cast <void> (0) : __assert_fail ("K == MemRegion::GlobalInternalSpaceRegionKind" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 854, __PRETTY_FUNCTION__)); | ||||||
855 | return LazyAllocate(InternalGlobals); | ||||||
856 | } | ||||||
857 | |||||||
858 | assert(K == MemRegion::StaticGlobalSpaceRegionKind)((K == MemRegion::StaticGlobalSpaceRegionKind) ? static_cast< void> (0) : __assert_fail ("K == MemRegion::StaticGlobalSpaceRegionKind" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 858, __PRETTY_FUNCTION__)); | ||||||
859 | StaticGlobalSpaceRegion *&R = StaticsGlobalSpaceRegions[CR]; | ||||||
860 | if (R) | ||||||
861 | return R; | ||||||
862 | |||||||
863 | R = A.Allocate<StaticGlobalSpaceRegion>(); | ||||||
864 | new (R) StaticGlobalSpaceRegion(*this, CR); | ||||||
865 | return R; | ||||||
866 | } | ||||||
867 | |||||||
868 | const HeapSpaceRegion *MemRegionManager::getHeapRegion() { | ||||||
869 | return LazyAllocate(heap); | ||||||
870 | } | ||||||
871 | |||||||
872 | const UnknownSpaceRegion *MemRegionManager::getUnknownRegion() { | ||||||
873 | return LazyAllocate(unknown); | ||||||
874 | } | ||||||
875 | |||||||
876 | const CodeSpaceRegion *MemRegionManager::getCodeRegion() { | ||||||
877 | return LazyAllocate(code); | ||||||
878 | } | ||||||
879 | |||||||
880 | //===----------------------------------------------------------------------===// | ||||||
881 | // Constructing regions. | ||||||
882 | //===----------------------------------------------------------------------===// | ||||||
883 | |||||||
884 | const StringRegion *MemRegionManager::getStringRegion(const StringLiteral *Str){ | ||||||
885 | return getSubRegion<StringRegion>( | ||||||
886 | Str, cast<GlobalInternalSpaceRegion>(getGlobalsRegion())); | ||||||
887 | } | ||||||
888 | |||||||
889 | const ObjCStringRegion * | ||||||
890 | MemRegionManager::getObjCStringRegion(const ObjCStringLiteral *Str){ | ||||||
891 | return getSubRegion<ObjCStringRegion>( | ||||||
892 | Str, cast<GlobalInternalSpaceRegion>(getGlobalsRegion())); | ||||||
893 | } | ||||||
894 | |||||||
895 | /// Look through a chain of LocationContexts to either find the | ||||||
896 | /// StackFrameContext that matches a DeclContext, or find a VarRegion | ||||||
897 | /// for a variable captured by a block. | ||||||
898 | static llvm::PointerUnion<const StackFrameContext *, const VarRegion *> | ||||||
899 | getStackOrCaptureRegionForDeclContext(const LocationContext *LC, | ||||||
900 | const DeclContext *DC, | ||||||
901 | const VarDecl *VD) { | ||||||
902 | while (LC) { | ||||||
903 | if (const auto *SFC = dyn_cast<StackFrameContext>(LC)) { | ||||||
904 | if (cast<DeclContext>(SFC->getDecl()) == DC) | ||||||
905 | return SFC; | ||||||
906 | } | ||||||
907 | if (const auto *BC = dyn_cast<BlockInvocationContext>(LC)) { | ||||||
908 | const auto *BR = static_cast<const BlockDataRegion *>(BC->getData()); | ||||||
909 | // FIXME: This can be made more efficient. | ||||||
910 | for (BlockDataRegion::referenced_vars_iterator | ||||||
911 | I = BR->referenced_vars_begin(), | ||||||
912 | E = BR->referenced_vars_end(); I != E; ++I) { | ||||||
913 | const TypedValueRegion *OrigR = I.getOriginalRegion(); | ||||||
914 | if (const auto *VR = dyn_cast<VarRegion>(OrigR)) { | ||||||
915 | if (VR->getDecl() == VD) | ||||||
916 | return cast<VarRegion>(I.getCapturedRegion()); | ||||||
917 | } | ||||||
918 | } | ||||||
919 | } | ||||||
920 | |||||||
921 | LC = LC->getParent(); | ||||||
922 | } | ||||||
923 | return (const StackFrameContext *)nullptr; | ||||||
924 | } | ||||||
925 | |||||||
926 | const VarRegion *MemRegionManager::getVarRegion(const VarDecl *D, | ||||||
927 | const LocationContext *LC) { | ||||||
928 | const auto *PVD = dyn_cast<ParmVarDecl>(D); | ||||||
929 | if (PVD
| ||||||
930 | unsigned Index = PVD->getFunctionScopeIndex(); | ||||||
931 | const StackFrameContext *SFC = LC->getStackFrame(); | ||||||
| |||||||
932 | const Stmt *CallSite = SFC->getCallSite(); | ||||||
933 | if (CallSite) { | ||||||
934 | const Decl *D = SFC->getDecl(); | ||||||
935 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
936 | if (Index < FD->param_size() && FD->parameters()[Index] == PVD) | ||||||
937 | return getSubRegion<ParamVarRegion>(cast<Expr>(CallSite), Index, | ||||||
938 | getStackArgumentsRegion(SFC)); | ||||||
939 | } else if (const auto *BD = dyn_cast<BlockDecl>(D)) { | ||||||
940 | if (Index < BD->param_size() && BD->parameters()[Index] == PVD) | ||||||
941 | return getSubRegion<ParamVarRegion>(cast<Expr>(CallSite), Index, | ||||||
942 | getStackArgumentsRegion(SFC)); | ||||||
943 | } else { | ||||||
944 | return getSubRegion<ParamVarRegion>(cast<Expr>(CallSite), Index, | ||||||
945 | getStackArgumentsRegion(SFC)); | ||||||
946 | } | ||||||
947 | } | ||||||
948 | } | ||||||
949 | |||||||
950 | D = D->getCanonicalDecl(); | ||||||
951 | const MemRegion *sReg = nullptr; | ||||||
952 | |||||||
953 | if (D->hasGlobalStorage() && !D->isStaticLocal()) { | ||||||
954 | |||||||
955 | // First handle the globals defined in system headers. | ||||||
956 | if (Ctx.getSourceManager().isInSystemHeader(D->getLocation())) { | ||||||
957 | // Whitelist the system globals which often DO GET modified, assume the | ||||||
958 | // rest are immutable. | ||||||
959 | if (D->getName().find("errno") != StringRef::npos) | ||||||
960 | sReg = getGlobalsRegion(MemRegion::GlobalSystemSpaceRegionKind); | ||||||
961 | else | ||||||
962 | sReg = getGlobalsRegion(MemRegion::GlobalImmutableSpaceRegionKind); | ||||||
963 | |||||||
964 | // Treat other globals as GlobalInternal unless they are constants. | ||||||
965 | } else { | ||||||
966 | QualType GQT = D->getType(); | ||||||
967 | const Type *GT = GQT.getTypePtrOrNull(); | ||||||
968 | // TODO: We could walk the complex types here and see if everything is | ||||||
969 | // constified. | ||||||
970 | if (GT && GQT.isConstQualified() && GT->isArithmeticType()) | ||||||
971 | sReg = getGlobalsRegion(MemRegion::GlobalImmutableSpaceRegionKind); | ||||||
972 | else | ||||||
973 | sReg = getGlobalsRegion(); | ||||||
974 | } | ||||||
975 | |||||||
976 | // Finally handle static locals. | ||||||
977 | } else { | ||||||
978 | // FIXME: Once we implement scope handling, we will need to properly lookup | ||||||
979 | // 'D' to the proper LocationContext. | ||||||
980 | const DeclContext *DC = D->getDeclContext(); | ||||||
981 | llvm::PointerUnion<const StackFrameContext *, const VarRegion *> V = | ||||||
982 | getStackOrCaptureRegionForDeclContext(LC, DC, D); | ||||||
983 | |||||||
984 | if (V.is<const VarRegion*>()) | ||||||
985 | return V.get<const VarRegion*>(); | ||||||
986 | |||||||
987 | const auto *STC = V.get<const StackFrameContext *>(); | ||||||
988 | |||||||
989 | if (!STC) { | ||||||
990 | // FIXME: Assign a more sensible memory space to static locals | ||||||
991 | // we see from within blocks that we analyze as top-level declarations. | ||||||
992 | sReg = getUnknownRegion(); | ||||||
993 | } else { | ||||||
994 | if (D->hasLocalStorage()) { | ||||||
995 | sReg = isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D) | ||||||
996 | ? static_cast<const MemRegion*>(getStackArgumentsRegion(STC)) | ||||||
997 | : static_cast<const MemRegion*>(getStackLocalsRegion(STC)); | ||||||
998 | } | ||||||
999 | else { | ||||||
1000 | assert(D->isStaticLocal())((D->isStaticLocal()) ? static_cast<void> (0) : __assert_fail ("D->isStaticLocal()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1000, __PRETTY_FUNCTION__)); | ||||||
1001 | const Decl *STCD = STC->getDecl(); | ||||||
1002 | if (isa<FunctionDecl>(STCD) || isa<ObjCMethodDecl>(STCD)) | ||||||
1003 | sReg = getGlobalsRegion(MemRegion::StaticGlobalSpaceRegionKind, | ||||||
1004 | getFunctionCodeRegion(cast<NamedDecl>(STCD))); | ||||||
1005 | else if (const auto *BD = dyn_cast<BlockDecl>(STCD)) { | ||||||
1006 | // FIXME: The fallback type here is totally bogus -- though it should | ||||||
1007 | // never be queried, it will prevent uniquing with the real | ||||||
1008 | // BlockCodeRegion. Ideally we'd fix the AST so that we always had a | ||||||
1009 | // signature. | ||||||
1010 | QualType T; | ||||||
1011 | if (const TypeSourceInfo *TSI = BD->getSignatureAsWritten()) | ||||||
1012 | T = TSI->getType(); | ||||||
1013 | if (T.isNull()) | ||||||
1014 | T = getContext().VoidTy; | ||||||
1015 | if (!T->getAs<FunctionType>()) | ||||||
1016 | T = getContext().getFunctionNoProtoType(T); | ||||||
1017 | T = getContext().getBlockPointerType(T); | ||||||
1018 | |||||||
1019 | const BlockCodeRegion *BTR = | ||||||
1020 | getBlockCodeRegion(BD, Ctx.getCanonicalType(T), | ||||||
1021 | STC->getAnalysisDeclContext()); | ||||||
1022 | sReg = getGlobalsRegion(MemRegion::StaticGlobalSpaceRegionKind, | ||||||
1023 | BTR); | ||||||
1024 | } | ||||||
1025 | else { | ||||||
1026 | sReg = getGlobalsRegion(); | ||||||
1027 | } | ||||||
1028 | } | ||||||
1029 | } | ||||||
1030 | } | ||||||
1031 | |||||||
1032 | return getSubRegion<NonParamVarRegion>(D, sReg); | ||||||
1033 | } | ||||||
1034 | |||||||
1035 | const NonParamVarRegion * | ||||||
1036 | MemRegionManager::getNonParamVarRegion(const VarDecl *D, | ||||||
1037 | const MemRegion *superR) { | ||||||
1038 | D = D->getCanonicalDecl(); | ||||||
1039 | return getSubRegion<NonParamVarRegion>(D, superR); | ||||||
1040 | } | ||||||
1041 | |||||||
1042 | const ParamVarRegion * | ||||||
1043 | MemRegionManager::getParamVarRegion(const Expr *OriginExpr, unsigned Index, | ||||||
1044 | const LocationContext *LC) { | ||||||
1045 | const StackFrameContext *SFC = LC->getStackFrame(); | ||||||
1046 | assert(SFC)((SFC) ? static_cast<void> (0) : __assert_fail ("SFC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1046, __PRETTY_FUNCTION__)); | ||||||
1047 | return getSubRegion<ParamVarRegion>(OriginExpr, Index, | ||||||
1048 | getStackArgumentsRegion(SFC)); | ||||||
1049 | } | ||||||
1050 | |||||||
1051 | const BlockDataRegion * | ||||||
1052 | MemRegionManager::getBlockDataRegion(const BlockCodeRegion *BC, | ||||||
1053 | const LocationContext *LC, | ||||||
1054 | unsigned blockCount) { | ||||||
1055 | const MemSpaceRegion *sReg = nullptr; | ||||||
1056 | const BlockDecl *BD = BC->getDecl(); | ||||||
1057 | if (!BD->hasCaptures()) { | ||||||
1058 | // This handles 'static' blocks. | ||||||
1059 | sReg = getGlobalsRegion(MemRegion::GlobalImmutableSpaceRegionKind); | ||||||
1060 | } | ||||||
1061 | else { | ||||||
1062 | if (LC) { | ||||||
1063 | // FIXME: Once we implement scope handling, we want the parent region | ||||||
1064 | // to be the scope. | ||||||
1065 | const StackFrameContext *STC = LC->getStackFrame(); | ||||||
1066 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1066, __PRETTY_FUNCTION__)); | ||||||
1067 | sReg = getStackLocalsRegion(STC); | ||||||
1068 | } | ||||||
1069 | else { | ||||||
1070 | // We allow 'LC' to be NULL for cases where want BlockDataRegions | ||||||
1071 | // without context-sensitivity. | ||||||
1072 | sReg = getUnknownRegion(); | ||||||
1073 | } | ||||||
1074 | } | ||||||
1075 | |||||||
1076 | return getSubRegion<BlockDataRegion>(BC, LC, blockCount, sReg); | ||||||
1077 | } | ||||||
1078 | |||||||
1079 | const CXXTempObjectRegion * | ||||||
1080 | MemRegionManager::getCXXStaticTempObjectRegion(const Expr *Ex) { | ||||||
1081 | return getSubRegion<CXXTempObjectRegion>( | ||||||
1082 | Ex, getGlobalsRegion(MemRegion::GlobalInternalSpaceRegionKind, nullptr)); | ||||||
1083 | } | ||||||
1084 | |||||||
1085 | const CompoundLiteralRegion* | ||||||
1086 | MemRegionManager::getCompoundLiteralRegion(const CompoundLiteralExpr *CL, | ||||||
1087 | const LocationContext *LC) { | ||||||
1088 | const MemSpaceRegion *sReg = nullptr; | ||||||
1089 | |||||||
1090 | if (CL->isFileScope()) | ||||||
1091 | sReg = getGlobalsRegion(); | ||||||
1092 | else { | ||||||
1093 | const StackFrameContext *STC = LC->getStackFrame(); | ||||||
1094 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1094, __PRETTY_FUNCTION__)); | ||||||
1095 | sReg = getStackLocalsRegion(STC); | ||||||
1096 | } | ||||||
1097 | |||||||
1098 | return getSubRegion<CompoundLiteralRegion>(CL, sReg); | ||||||
1099 | } | ||||||
1100 | |||||||
1101 | const ElementRegion* | ||||||
1102 | MemRegionManager::getElementRegion(QualType elementType, NonLoc Idx, | ||||||
1103 | const SubRegion* superRegion, | ||||||
1104 | ASTContext &Ctx){ | ||||||
1105 | QualType T = Ctx.getCanonicalType(elementType).getUnqualifiedType(); | ||||||
1106 | |||||||
1107 | llvm::FoldingSetNodeID ID; | ||||||
1108 | ElementRegion::ProfileRegion(ID, T, Idx, superRegion); | ||||||
1109 | |||||||
1110 | void *InsertPos; | ||||||
1111 | MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos); | ||||||
1112 | auto *R = cast_or_null<ElementRegion>(data); | ||||||
1113 | |||||||
1114 | if (!R) { | ||||||
1115 | R = A.Allocate<ElementRegion>(); | ||||||
1116 | new (R) ElementRegion(T, Idx, superRegion); | ||||||
1117 | Regions.InsertNode(R, InsertPos); | ||||||
1118 | } | ||||||
1119 | |||||||
1120 | return R; | ||||||
1121 | } | ||||||
1122 | |||||||
1123 | const FunctionCodeRegion * | ||||||
1124 | MemRegionManager::getFunctionCodeRegion(const NamedDecl *FD) { | ||||||
1125 | // To think: should we canonicalize the declaration here? | ||||||
1126 | return getSubRegion<FunctionCodeRegion>(FD, getCodeRegion()); | ||||||
1127 | } | ||||||
1128 | |||||||
1129 | const BlockCodeRegion * | ||||||
1130 | MemRegionManager::getBlockCodeRegion(const BlockDecl *BD, CanQualType locTy, | ||||||
1131 | AnalysisDeclContext *AC) { | ||||||
1132 | return getSubRegion<BlockCodeRegion>(BD, locTy, AC, getCodeRegion()); | ||||||
1133 | } | ||||||
1134 | |||||||
1135 | /// getSymbolicRegion - Retrieve or create a "symbolic" memory region. | ||||||
1136 | const SymbolicRegion *MemRegionManager::getSymbolicRegion(SymbolRef sym) { | ||||||
1137 | return getSubRegion<SymbolicRegion>(sym, getUnknownRegion()); | ||||||
1138 | } | ||||||
1139 | |||||||
1140 | const SymbolicRegion *MemRegionManager::getSymbolicHeapRegion(SymbolRef Sym) { | ||||||
1141 | return getSubRegion<SymbolicRegion>(Sym, getHeapRegion()); | ||||||
1142 | } | ||||||
1143 | |||||||
1144 | const FieldRegion* | ||||||
1145 | MemRegionManager::getFieldRegion(const FieldDecl *d, | ||||||
1146 | const SubRegion* superRegion){ | ||||||
1147 | return getSubRegion<FieldRegion>(d, superRegion); | ||||||
1148 | } | ||||||
1149 | |||||||
1150 | const ObjCIvarRegion* | ||||||
1151 | MemRegionManager::getObjCIvarRegion(const ObjCIvarDecl *d, | ||||||
1152 | const SubRegion* superRegion) { | ||||||
1153 | return getSubRegion<ObjCIvarRegion>(d, superRegion); | ||||||
1154 | } | ||||||
1155 | |||||||
1156 | const CXXTempObjectRegion* | ||||||
1157 | MemRegionManager::getCXXTempObjectRegion(Expr const *E, | ||||||
1158 | LocationContext const *LC) { | ||||||
1159 | const StackFrameContext *SFC = LC->getStackFrame(); | ||||||
1160 | assert(SFC)((SFC) ? static_cast<void> (0) : __assert_fail ("SFC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1160, __PRETTY_FUNCTION__)); | ||||||
1161 | return getSubRegion<CXXTempObjectRegion>(E, getStackLocalsRegion(SFC)); | ||||||
1162 | } | ||||||
1163 | |||||||
1164 | /// Checks whether \p BaseClass is a valid virtual or direct non-virtual base | ||||||
1165 | /// class of the type of \p Super. | ||||||
1166 | static bool isValidBaseClass(const CXXRecordDecl *BaseClass, | ||||||
1167 | const TypedValueRegion *Super, | ||||||
1168 | bool IsVirtual) { | ||||||
1169 | BaseClass = BaseClass->getCanonicalDecl(); | ||||||
1170 | |||||||
1171 | const CXXRecordDecl *Class = Super->getValueType()->getAsCXXRecordDecl(); | ||||||
1172 | if (!Class) | ||||||
1173 | return true; | ||||||
1174 | |||||||
1175 | if (IsVirtual) | ||||||
1176 | return Class->isVirtuallyDerivedFrom(BaseClass); | ||||||
1177 | |||||||
1178 | for (const auto &I : Class->bases()) { | ||||||
1179 | if (I.getType()->getAsCXXRecordDecl()->getCanonicalDecl() == BaseClass) | ||||||
1180 | return true; | ||||||
1181 | } | ||||||
1182 | |||||||
1183 | return false; | ||||||
1184 | } | ||||||
1185 | |||||||
1186 | const CXXBaseObjectRegion * | ||||||
1187 | MemRegionManager::getCXXBaseObjectRegion(const CXXRecordDecl *RD, | ||||||
1188 | const SubRegion *Super, | ||||||
1189 | bool IsVirtual) { | ||||||
1190 | if (isa<TypedValueRegion>(Super)) { | ||||||
1191 | assert(isValidBaseClass(RD, cast<TypedValueRegion>(Super), IsVirtual))((isValidBaseClass(RD, cast<TypedValueRegion>(Super), IsVirtual )) ? static_cast<void> (0) : __assert_fail ("isValidBaseClass(RD, cast<TypedValueRegion>(Super), IsVirtual)" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1191, __PRETTY_FUNCTION__)); | ||||||
1192 | (void)&isValidBaseClass; | ||||||
1193 | |||||||
1194 | if (IsVirtual) { | ||||||
1195 | // Virtual base regions should not be layered, since the layout rules | ||||||
1196 | // are different. | ||||||
1197 | while (const auto *Base = dyn_cast<CXXBaseObjectRegion>(Super)) | ||||||
1198 | Super = cast<SubRegion>(Base->getSuperRegion()); | ||||||
1199 | assert(Super && !isa<MemSpaceRegion>(Super))((Super && !isa<MemSpaceRegion>(Super)) ? static_cast <void> (0) : __assert_fail ("Super && !isa<MemSpaceRegion>(Super)" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1199, __PRETTY_FUNCTION__)); | ||||||
1200 | } | ||||||
1201 | } | ||||||
1202 | |||||||
1203 | return getSubRegion<CXXBaseObjectRegion>(RD, IsVirtual, Super); | ||||||
1204 | } | ||||||
1205 | |||||||
1206 | const CXXDerivedObjectRegion * | ||||||
1207 | MemRegionManager::getCXXDerivedObjectRegion(const CXXRecordDecl *RD, | ||||||
1208 | const SubRegion *Super) { | ||||||
1209 | return getSubRegion<CXXDerivedObjectRegion>(RD, Super); | ||||||
1210 | } | ||||||
1211 | |||||||
1212 | const CXXThisRegion* | ||||||
1213 | MemRegionManager::getCXXThisRegion(QualType thisPointerTy, | ||||||
1214 | const LocationContext *LC) { | ||||||
1215 | const auto *PT = thisPointerTy->getAs<PointerType>(); | ||||||
1216 | assert(PT)((PT) ? static_cast<void> (0) : __assert_fail ("PT", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1216, __PRETTY_FUNCTION__)); | ||||||
1217 | // Inside the body of the operator() of a lambda a this expr might refer to an | ||||||
1218 | // object in one of the parent location contexts. | ||||||
1219 | const auto *D = dyn_cast<CXXMethodDecl>(LC->getDecl()); | ||||||
1220 | // FIXME: when operator() of lambda is analyzed as a top level function and | ||||||
1221 | // 'this' refers to a this to the enclosing scope, there is no right region to | ||||||
1222 | // return. | ||||||
1223 | while (!LC->inTopFrame() && (!D || D->isStatic() || | ||||||
1224 | PT != D->getThisType()->getAs<PointerType>())) { | ||||||
1225 | LC = LC->getParent(); | ||||||
1226 | D = dyn_cast<CXXMethodDecl>(LC->getDecl()); | ||||||
1227 | } | ||||||
1228 | const StackFrameContext *STC = LC->getStackFrame(); | ||||||
1229 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1229, __PRETTY_FUNCTION__)); | ||||||
1230 | return getSubRegion<CXXThisRegion>(PT, getStackArgumentsRegion(STC)); | ||||||
1231 | } | ||||||
1232 | |||||||
1233 | const AllocaRegion* | ||||||
1234 | MemRegionManager::getAllocaRegion(const Expr *E, unsigned cnt, | ||||||
1235 | const LocationContext *LC) { | ||||||
1236 | const StackFrameContext *STC = LC->getStackFrame(); | ||||||
1237 | assert(STC)((STC) ? static_cast<void> (0) : __assert_fail ("STC", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1237, __PRETTY_FUNCTION__)); | ||||||
1238 | return getSubRegion<AllocaRegion>(E, cnt, getStackLocalsRegion(STC)); | ||||||
1239 | } | ||||||
1240 | |||||||
1241 | const MemSpaceRegion *MemRegion::getMemorySpace() const { | ||||||
1242 | const MemRegion *R = this; | ||||||
1243 | const auto *SR = dyn_cast<SubRegion>(this); | ||||||
1244 | |||||||
1245 | while (SR) { | ||||||
1246 | R = SR->getSuperRegion(); | ||||||
1247 | SR = dyn_cast<SubRegion>(R); | ||||||
1248 | } | ||||||
1249 | |||||||
1250 | return dyn_cast<MemSpaceRegion>(R); | ||||||
1251 | } | ||||||
1252 | |||||||
1253 | bool MemRegion::hasStackStorage() const { | ||||||
1254 | return isa<StackSpaceRegion>(getMemorySpace()); | ||||||
1255 | } | ||||||
1256 | |||||||
1257 | bool MemRegion::hasStackNonParametersStorage() const { | ||||||
1258 | return isa<StackLocalsSpaceRegion>(getMemorySpace()); | ||||||
1259 | } | ||||||
1260 | |||||||
1261 | bool MemRegion::hasStackParametersStorage() const { | ||||||
1262 | return isa<StackArgumentsSpaceRegion>(getMemorySpace()); | ||||||
1263 | } | ||||||
1264 | |||||||
1265 | bool MemRegion::hasGlobalsOrParametersStorage() const { | ||||||
1266 | const MemSpaceRegion *MS = getMemorySpace(); | ||||||
1267 | return isa<StackArgumentsSpaceRegion>(MS) || | ||||||
1268 | isa<GlobalsSpaceRegion>(MS); | ||||||
1269 | } | ||||||
1270 | |||||||
1271 | // getBaseRegion strips away all elements and fields, and get the base region | ||||||
1272 | // of them. | ||||||
1273 | const MemRegion *MemRegion::getBaseRegion() const { | ||||||
1274 | const MemRegion *R = this; | ||||||
1275 | while (true) { | ||||||
1276 | switch (R->getKind()) { | ||||||
1277 | case MemRegion::ElementRegionKind: | ||||||
1278 | case MemRegion::FieldRegionKind: | ||||||
1279 | case MemRegion::ObjCIvarRegionKind: | ||||||
1280 | case MemRegion::CXXBaseObjectRegionKind: | ||||||
1281 | case MemRegion::CXXDerivedObjectRegionKind: | ||||||
1282 | R = cast<SubRegion>(R)->getSuperRegion(); | ||||||
1283 | continue; | ||||||
1284 | default: | ||||||
1285 | break; | ||||||
1286 | } | ||||||
1287 | break; | ||||||
1288 | } | ||||||
1289 | return R; | ||||||
1290 | } | ||||||
1291 | |||||||
1292 | // getgetMostDerivedObjectRegion gets the region of the root class of a C++ | ||||||
1293 | // class hierarchy. | ||||||
1294 | const MemRegion *MemRegion::getMostDerivedObjectRegion() const { | ||||||
1295 | const MemRegion *R = this; | ||||||
1296 | while (const auto *BR = dyn_cast<CXXBaseObjectRegion>(R)) | ||||||
1297 | R = BR->getSuperRegion(); | ||||||
1298 | return R; | ||||||
1299 | } | ||||||
1300 | |||||||
1301 | bool MemRegion::isSubRegionOf(const MemRegion *) const { | ||||||
1302 | return false; | ||||||
1303 | } | ||||||
1304 | |||||||
1305 | //===----------------------------------------------------------------------===// | ||||||
1306 | // View handling. | ||||||
1307 | //===----------------------------------------------------------------------===// | ||||||
1308 | |||||||
1309 | const MemRegion *MemRegion::StripCasts(bool StripBaseAndDerivedCasts) const { | ||||||
1310 | const MemRegion *R = this; | ||||||
1311 | while (true) { | ||||||
1312 | switch (R->getKind()) { | ||||||
1313 | case ElementRegionKind: { | ||||||
1314 | const auto *ER = cast<ElementRegion>(R); | ||||||
1315 | if (!ER->getIndex().isZeroConstant()) | ||||||
1316 | return R; | ||||||
1317 | R = ER->getSuperRegion(); | ||||||
1318 | break; | ||||||
1319 | } | ||||||
1320 | case CXXBaseObjectRegionKind: | ||||||
1321 | case CXXDerivedObjectRegionKind: | ||||||
1322 | if (!StripBaseAndDerivedCasts) | ||||||
1323 | return R; | ||||||
1324 | R = cast<TypedValueRegion>(R)->getSuperRegion(); | ||||||
1325 | break; | ||||||
1326 | default: | ||||||
1327 | return R; | ||||||
1328 | } | ||||||
1329 | } | ||||||
1330 | } | ||||||
1331 | |||||||
1332 | const SymbolicRegion *MemRegion::getSymbolicBase() const { | ||||||
1333 | const auto *SubR = dyn_cast<SubRegion>(this); | ||||||
1334 | |||||||
1335 | while (SubR) { | ||||||
1336 | if (const auto *SymR = dyn_cast<SymbolicRegion>(SubR)) | ||||||
1337 | return SymR; | ||||||
1338 | SubR = dyn_cast<SubRegion>(SubR->getSuperRegion()); | ||||||
1339 | } | ||||||
1340 | return nullptr; | ||||||
1341 | } | ||||||
1342 | |||||||
1343 | RegionRawOffset ElementRegion::getAsArrayOffset() const { | ||||||
1344 | int64_t offset = 0; | ||||||
1345 | const ElementRegion *ER = this; | ||||||
1346 | const MemRegion *superR = nullptr; | ||||||
1347 | ASTContext &C = getContext(); | ||||||
1348 | |||||||
1349 | // FIXME: Handle multi-dimensional arrays. | ||||||
1350 | |||||||
1351 | while (ER) { | ||||||
1352 | superR = ER->getSuperRegion(); | ||||||
1353 | |||||||
1354 | // FIXME: generalize to symbolic offsets. | ||||||
1355 | SVal index = ER->getIndex(); | ||||||
1356 | if (auto CI = index.getAs<nonloc::ConcreteInt>()) { | ||||||
1357 | // Update the offset. | ||||||
1358 | int64_t i = CI->getValue().getSExtValue(); | ||||||
1359 | |||||||
1360 | if (i != 0) { | ||||||
1361 | QualType elemType = ER->getElementType(); | ||||||
1362 | |||||||
1363 | // If we are pointing to an incomplete type, go no further. | ||||||
1364 | if (elemType->isIncompleteType()) { | ||||||
1365 | superR = ER; | ||||||
1366 | break; | ||||||
1367 | } | ||||||
1368 | |||||||
1369 | int64_t size = C.getTypeSizeInChars(elemType).getQuantity(); | ||||||
1370 | if (auto NewOffset = llvm::checkedMulAdd(i, size, offset)) { | ||||||
1371 | offset = *NewOffset; | ||||||
1372 | } else { | ||||||
1373 | LLVM_DEBUG(llvm::dbgs() << "MemRegion::getAsArrayOffset: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MemRegion")) { llvm::dbgs() << "MemRegion::getAsArrayOffset: " << "offset overflowing, returning unknown\n"; } } while (false) | ||||||
1374 | << "offset overflowing, returning unknown\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("MemRegion")) { llvm::dbgs() << "MemRegion::getAsArrayOffset: " << "offset overflowing, returning unknown\n"; } } while (false); | ||||||
1375 | |||||||
1376 | return nullptr; | ||||||
1377 | } | ||||||
1378 | } | ||||||
1379 | |||||||
1380 | // Go to the next ElementRegion (if any). | ||||||
1381 | ER = dyn_cast<ElementRegion>(superR); | ||||||
1382 | continue; | ||||||
1383 | } | ||||||
1384 | |||||||
1385 | return nullptr; | ||||||
1386 | } | ||||||
1387 | |||||||
1388 | assert(superR && "super region cannot be NULL")((superR && "super region cannot be NULL") ? static_cast <void> (0) : __assert_fail ("superR && \"super region cannot be NULL\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1388, __PRETTY_FUNCTION__)); | ||||||
1389 | return RegionRawOffset(superR, CharUnits::fromQuantity(offset)); | ||||||
1390 | } | ||||||
1391 | |||||||
1392 | /// Returns true if \p Base is an immediate base class of \p Child | ||||||
1393 | static bool isImmediateBase(const CXXRecordDecl *Child, | ||||||
1394 | const CXXRecordDecl *Base) { | ||||||
1395 | assert(Child && "Child must not be null")((Child && "Child must not be null") ? static_cast< void> (0) : __assert_fail ("Child && \"Child must not be null\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1395, __PRETTY_FUNCTION__)); | ||||||
1396 | // Note that we do NOT canonicalize the base class here, because | ||||||
1397 | // ASTRecordLayout doesn't either. If that leads us down the wrong path, | ||||||
1398 | // so be it; at least we won't crash. | ||||||
1399 | for (const auto &I : Child->bases()) { | ||||||
1400 | if (I.getType()->getAsCXXRecordDecl() == Base) | ||||||
1401 | return true; | ||||||
1402 | } | ||||||
1403 | |||||||
1404 | return false; | ||||||
1405 | } | ||||||
1406 | |||||||
1407 | static RegionOffset calculateOffset(const MemRegion *R) { | ||||||
1408 | const MemRegion *SymbolicOffsetBase = nullptr; | ||||||
1409 | int64_t Offset = 0; | ||||||
1410 | |||||||
1411 | while (true) { | ||||||
1412 | switch (R->getKind()) { | ||||||
1413 | case MemRegion::CodeSpaceRegionKind: | ||||||
1414 | case MemRegion::StackLocalsSpaceRegionKind: | ||||||
1415 | case MemRegion::StackArgumentsSpaceRegionKind: | ||||||
1416 | case MemRegion::HeapSpaceRegionKind: | ||||||
1417 | case MemRegion::UnknownSpaceRegionKind: | ||||||
1418 | case MemRegion::StaticGlobalSpaceRegionKind: | ||||||
1419 | case MemRegion::GlobalInternalSpaceRegionKind: | ||||||
1420 | case MemRegion::GlobalSystemSpaceRegionKind: | ||||||
1421 | case MemRegion::GlobalImmutableSpaceRegionKind: | ||||||
1422 | // Stores can bind directly to a region space to set a default value. | ||||||
1423 | assert(Offset == 0 && !SymbolicOffsetBase)((Offset == 0 && !SymbolicOffsetBase) ? static_cast< void> (0) : __assert_fail ("Offset == 0 && !SymbolicOffsetBase" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1423, __PRETTY_FUNCTION__)); | ||||||
1424 | goto Finish; | ||||||
1425 | |||||||
1426 | case MemRegion::FunctionCodeRegionKind: | ||||||
1427 | case MemRegion::BlockCodeRegionKind: | ||||||
1428 | case MemRegion::BlockDataRegionKind: | ||||||
1429 | // These will never have bindings, but may end up having values requested | ||||||
1430 | // if the user does some strange casting. | ||||||
1431 | if (Offset != 0) | ||||||
1432 | SymbolicOffsetBase = R; | ||||||
1433 | goto Finish; | ||||||
1434 | |||||||
1435 | case MemRegion::SymbolicRegionKind: | ||||||
1436 | case MemRegion::AllocaRegionKind: | ||||||
1437 | case MemRegion::CompoundLiteralRegionKind: | ||||||
1438 | case MemRegion::CXXThisRegionKind: | ||||||
1439 | case MemRegion::StringRegionKind: | ||||||
1440 | case MemRegion::ObjCStringRegionKind: | ||||||
1441 | case MemRegion::NonParamVarRegionKind: | ||||||
1442 | case MemRegion::ParamVarRegionKind: | ||||||
1443 | case MemRegion::CXXTempObjectRegionKind: | ||||||
1444 | // Usual base regions. | ||||||
1445 | goto Finish; | ||||||
1446 | |||||||
1447 | case MemRegion::ObjCIvarRegionKind: | ||||||
1448 | // This is a little strange, but it's a compromise between | ||||||
1449 | // ObjCIvarRegions having unknown compile-time offsets (when using the | ||||||
1450 | // non-fragile runtime) and yet still being distinct, non-overlapping | ||||||
1451 | // regions. Thus we treat them as "like" base regions for the purposes | ||||||
1452 | // of computing offsets. | ||||||
1453 | goto Finish; | ||||||
1454 | |||||||
1455 | case MemRegion::CXXBaseObjectRegionKind: { | ||||||
1456 | const auto *BOR = cast<CXXBaseObjectRegion>(R); | ||||||
1457 | R = BOR->getSuperRegion(); | ||||||
1458 | |||||||
1459 | QualType Ty; | ||||||
1460 | bool RootIsSymbolic = false; | ||||||
1461 | if (const auto *TVR = dyn_cast<TypedValueRegion>(R)) { | ||||||
1462 | Ty = TVR->getDesugaredValueType(R->getContext()); | ||||||
1463 | } else if (const auto *SR = dyn_cast<SymbolicRegion>(R)) { | ||||||
1464 | // If our base region is symbolic, we don't know what type it really is. | ||||||
1465 | // Pretend the type of the symbol is the true dynamic type. | ||||||
1466 | // (This will at least be self-consistent for the life of the symbol.) | ||||||
1467 | Ty = SR->getSymbol()->getType()->getPointeeType(); | ||||||
1468 | RootIsSymbolic = true; | ||||||
1469 | } | ||||||
1470 | |||||||
1471 | const CXXRecordDecl *Child = Ty->getAsCXXRecordDecl(); | ||||||
1472 | if (!Child) { | ||||||
1473 | // We cannot compute the offset of the base class. | ||||||
1474 | SymbolicOffsetBase = R; | ||||||
1475 | } else { | ||||||
1476 | if (RootIsSymbolic) { | ||||||
1477 | // Base layers on symbolic regions may not be type-correct. | ||||||
1478 | // Double-check the inheritance here, and revert to a symbolic offset | ||||||
1479 | // if it's invalid (e.g. due to a reinterpret_cast). | ||||||
1480 | if (BOR->isVirtual()) { | ||||||
1481 | if (!Child->isVirtuallyDerivedFrom(BOR->getDecl())) | ||||||
1482 | SymbolicOffsetBase = R; | ||||||
1483 | } else { | ||||||
1484 | if (!isImmediateBase(Child, BOR->getDecl())) | ||||||
1485 | SymbolicOffsetBase = R; | ||||||
1486 | } | ||||||
1487 | } | ||||||
1488 | } | ||||||
1489 | |||||||
1490 | // Don't bother calculating precise offsets if we already have a | ||||||
1491 | // symbolic offset somewhere in the chain. | ||||||
1492 | if (SymbolicOffsetBase) | ||||||
1493 | continue; | ||||||
1494 | |||||||
1495 | CharUnits BaseOffset; | ||||||
1496 | const ASTRecordLayout &Layout = R->getContext().getASTRecordLayout(Child); | ||||||
1497 | if (BOR->isVirtual()) | ||||||
1498 | BaseOffset = Layout.getVBaseClassOffset(BOR->getDecl()); | ||||||
1499 | else | ||||||
1500 | BaseOffset = Layout.getBaseClassOffset(BOR->getDecl()); | ||||||
1501 | |||||||
1502 | // The base offset is in chars, not in bits. | ||||||
1503 | Offset += BaseOffset.getQuantity() * R->getContext().getCharWidth(); | ||||||
1504 | break; | ||||||
1505 | } | ||||||
1506 | |||||||
1507 | case MemRegion::CXXDerivedObjectRegionKind: { | ||||||
1508 | // TODO: Store the base type in the CXXDerivedObjectRegion and use it. | ||||||
1509 | goto Finish; | ||||||
1510 | } | ||||||
1511 | |||||||
1512 | case MemRegion::ElementRegionKind: { | ||||||
1513 | const auto *ER = cast<ElementRegion>(R); | ||||||
1514 | R = ER->getSuperRegion(); | ||||||
1515 | |||||||
1516 | QualType EleTy = ER->getValueType(); | ||||||
1517 | if (EleTy->isIncompleteType()) { | ||||||
1518 | // We cannot compute the offset of the base class. | ||||||
1519 | SymbolicOffsetBase = R; | ||||||
1520 | continue; | ||||||
1521 | } | ||||||
1522 | |||||||
1523 | SVal Index = ER->getIndex(); | ||||||
1524 | if (Optional<nonloc::ConcreteInt> CI = | ||||||
1525 | Index.getAs<nonloc::ConcreteInt>()) { | ||||||
1526 | // Don't bother calculating precise offsets if we already have a | ||||||
1527 | // symbolic offset somewhere in the chain. | ||||||
1528 | if (SymbolicOffsetBase) | ||||||
1529 | continue; | ||||||
1530 | |||||||
1531 | int64_t i = CI->getValue().getSExtValue(); | ||||||
1532 | // This type size is in bits. | ||||||
1533 | Offset += i * R->getContext().getTypeSize(EleTy); | ||||||
1534 | } else { | ||||||
1535 | // We cannot compute offset for non-concrete index. | ||||||
1536 | SymbolicOffsetBase = R; | ||||||
1537 | } | ||||||
1538 | break; | ||||||
1539 | } | ||||||
1540 | case MemRegion::FieldRegionKind: { | ||||||
1541 | const auto *FR = cast<FieldRegion>(R); | ||||||
1542 | R = FR->getSuperRegion(); | ||||||
1543 | assert(R)((R) ? static_cast<void> (0) : __assert_fail ("R", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1543, __PRETTY_FUNCTION__)); | ||||||
1544 | |||||||
1545 | const RecordDecl *RD = FR->getDecl()->getParent(); | ||||||
1546 | if (RD->isUnion() || !RD->isCompleteDefinition()) { | ||||||
1547 | // We cannot compute offset for incomplete type. | ||||||
1548 | // For unions, we could treat everything as offset 0, but we'd rather | ||||||
1549 | // treat each field as a symbolic offset so they aren't stored on top | ||||||
1550 | // of each other, since we depend on things in typed regions actually | ||||||
1551 | // matching their types. | ||||||
1552 | SymbolicOffsetBase = R; | ||||||
1553 | } | ||||||
1554 | |||||||
1555 | // Don't bother calculating precise offsets if we already have a | ||||||
1556 | // symbolic offset somewhere in the chain. | ||||||
1557 | if (SymbolicOffsetBase) | ||||||
1558 | continue; | ||||||
1559 | |||||||
1560 | // Get the field number. | ||||||
1561 | unsigned idx = 0; | ||||||
1562 | for (RecordDecl::field_iterator FI = RD->field_begin(), | ||||||
1563 | FE = RD->field_end(); FI != FE; ++FI, ++idx) { | ||||||
1564 | if (FR->getDecl() == *FI) | ||||||
1565 | break; | ||||||
1566 | } | ||||||
1567 | const ASTRecordLayout &Layout = R->getContext().getASTRecordLayout(RD); | ||||||
1568 | // This is offset in bits. | ||||||
1569 | Offset += Layout.getFieldOffset(idx); | ||||||
1570 | break; | ||||||
1571 | } | ||||||
1572 | } | ||||||
1573 | } | ||||||
1574 | |||||||
1575 | Finish: | ||||||
1576 | if (SymbolicOffsetBase) | ||||||
1577 | return RegionOffset(SymbolicOffsetBase, RegionOffset::Symbolic); | ||||||
1578 | return RegionOffset(R, Offset); | ||||||
1579 | } | ||||||
1580 | |||||||
1581 | RegionOffset MemRegion::getAsOffset() const { | ||||||
1582 | if (!cachedOffset) | ||||||
1583 | cachedOffset = calculateOffset(this); | ||||||
1584 | return *cachedOffset; | ||||||
1585 | } | ||||||
1586 | |||||||
1587 | //===----------------------------------------------------------------------===// | ||||||
1588 | // BlockDataRegion | ||||||
1589 | //===----------------------------------------------------------------------===// | ||||||
1590 | |||||||
1591 | std::pair<const VarRegion *, const VarRegion *> | ||||||
1592 | BlockDataRegion::getCaptureRegions(const VarDecl *VD) { | ||||||
1593 | MemRegionManager &MemMgr = getMemRegionManager(); | ||||||
1594 | const VarRegion *VR = nullptr; | ||||||
1595 | const VarRegion *OriginalVR = nullptr; | ||||||
1596 | |||||||
1597 | if (!VD->hasAttr<BlocksAttr>() && VD->hasLocalStorage()) { | ||||||
1598 | VR = MemMgr.getNonParamVarRegion(VD, this); | ||||||
1599 | OriginalVR = MemMgr.getVarRegion(VD, LC); | ||||||
1600 | } | ||||||
1601 | else { | ||||||
1602 | if (LC) { | ||||||
1603 | VR = MemMgr.getVarRegion(VD, LC); | ||||||
1604 | OriginalVR = VR; | ||||||
1605 | } | ||||||
1606 | else { | ||||||
1607 | VR = MemMgr.getNonParamVarRegion(VD, MemMgr.getUnknownRegion()); | ||||||
1608 | OriginalVR = MemMgr.getVarRegion(VD, LC); | ||||||
1609 | } | ||||||
1610 | } | ||||||
1611 | return std::make_pair(VR, OriginalVR); | ||||||
1612 | } | ||||||
1613 | |||||||
1614 | void BlockDataRegion::LazyInitializeReferencedVars() { | ||||||
1615 | if (ReferencedVars) | ||||||
1616 | return; | ||||||
1617 | |||||||
1618 | AnalysisDeclContext *AC = getCodeRegion()->getAnalysisDeclContext(); | ||||||
1619 | const auto &ReferencedBlockVars = AC->getReferencedBlockVars(BC->getDecl()); | ||||||
1620 | auto NumBlockVars = | ||||||
1621 | std::distance(ReferencedBlockVars.begin(), ReferencedBlockVars.end()); | ||||||
1622 | |||||||
1623 | if (NumBlockVars == 0) { | ||||||
1624 | ReferencedVars = (void*) 0x1; | ||||||
1625 | return; | ||||||
1626 | } | ||||||
1627 | |||||||
1628 | MemRegionManager &MemMgr = getMemRegionManager(); | ||||||
1629 | llvm::BumpPtrAllocator &A = MemMgr.getAllocator(); | ||||||
1630 | BumpVectorContext BC(A); | ||||||
1631 | |||||||
1632 | using VarVec = BumpVector<const MemRegion *>; | ||||||
1633 | |||||||
1634 | auto *BV = A.Allocate<VarVec>(); | ||||||
1635 | new (BV) VarVec(BC, NumBlockVars); | ||||||
1636 | auto *BVOriginal = A.Allocate<VarVec>(); | ||||||
1637 | new (BVOriginal) VarVec(BC, NumBlockVars); | ||||||
1638 | |||||||
1639 | for (const auto *VD : ReferencedBlockVars) { | ||||||
1640 | const VarRegion *VR = nullptr; | ||||||
1641 | const VarRegion *OriginalVR = nullptr; | ||||||
1642 | std::tie(VR, OriginalVR) = getCaptureRegions(VD); | ||||||
1643 | assert(VR)((VR) ? static_cast<void> (0) : __assert_fail ("VR", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1643, __PRETTY_FUNCTION__)); | ||||||
1644 | assert(OriginalVR)((OriginalVR) ? static_cast<void> (0) : __assert_fail ( "OriginalVR", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1644, __PRETTY_FUNCTION__)); | ||||||
1645 | BV->push_back(VR, BC); | ||||||
1646 | BVOriginal->push_back(OriginalVR, BC); | ||||||
1647 | } | ||||||
1648 | |||||||
1649 | ReferencedVars = BV; | ||||||
1650 | OriginalVars = BVOriginal; | ||||||
1651 | } | ||||||
1652 | |||||||
1653 | BlockDataRegion::referenced_vars_iterator | ||||||
1654 | BlockDataRegion::referenced_vars_begin() const { | ||||||
1655 | const_cast<BlockDataRegion*>(this)->LazyInitializeReferencedVars(); | ||||||
1656 | |||||||
1657 | auto *Vec = static_cast<BumpVector<const MemRegion *> *>(ReferencedVars); | ||||||
1658 | |||||||
1659 | if (Vec == (void*) 0x1) | ||||||
1660 | return BlockDataRegion::referenced_vars_iterator(nullptr, nullptr); | ||||||
1661 | |||||||
1662 | auto *VecOriginal = | ||||||
1663 | static_cast<BumpVector<const MemRegion *> *>(OriginalVars); | ||||||
1664 | |||||||
1665 | return BlockDataRegion::referenced_vars_iterator(Vec->begin(), | ||||||
1666 | VecOriginal->begin()); | ||||||
1667 | } | ||||||
1668 | |||||||
1669 | BlockDataRegion::referenced_vars_iterator | ||||||
1670 | BlockDataRegion::referenced_vars_end() const { | ||||||
1671 | const_cast<BlockDataRegion*>(this)->LazyInitializeReferencedVars(); | ||||||
1672 | |||||||
1673 | auto *Vec = static_cast<BumpVector<const MemRegion *> *>(ReferencedVars); | ||||||
1674 | |||||||
1675 | if (Vec == (void*) 0x1) | ||||||
1676 | return BlockDataRegion::referenced_vars_iterator(nullptr, nullptr); | ||||||
1677 | |||||||
1678 | auto *VecOriginal = | ||||||
1679 | static_cast<BumpVector<const MemRegion *> *>(OriginalVars); | ||||||
1680 | |||||||
1681 | return BlockDataRegion::referenced_vars_iterator(Vec->end(), | ||||||
1682 | VecOriginal->end()); | ||||||
1683 | } | ||||||
1684 | |||||||
1685 | const VarRegion *BlockDataRegion::getOriginalRegion(const VarRegion *R) const { | ||||||
1686 | for (referenced_vars_iterator I = referenced_vars_begin(), | ||||||
| |||||||
1687 | E = referenced_vars_end(); | ||||||
1688 | I != E; ++I) { | ||||||
1689 | if (I.getCapturedRegion() == R) | ||||||
1690 | return I.getOriginalRegion(); | ||||||
1691 | } | ||||||
1692 | return nullptr; | ||||||
1693 | } | ||||||
1694 | |||||||
1695 | //===----------------------------------------------------------------------===// | ||||||
1696 | // RegionAndSymbolInvalidationTraits | ||||||
1697 | //===----------------------------------------------------------------------===// | ||||||
1698 | |||||||
1699 | void RegionAndSymbolInvalidationTraits::setTrait(SymbolRef Sym, | ||||||
1700 | InvalidationKinds IK) { | ||||||
1701 | SymTraitsMap[Sym] |= IK; | ||||||
1702 | } | ||||||
1703 | |||||||
1704 | void RegionAndSymbolInvalidationTraits::setTrait(const MemRegion *MR, | ||||||
1705 | InvalidationKinds IK) { | ||||||
1706 | assert(MR)((MR) ? static_cast<void> (0) : __assert_fail ("MR", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/lib/StaticAnalyzer/Core/MemRegion.cpp" , 1706, __PRETTY_FUNCTION__)); | ||||||
1707 | if (const auto *SR = dyn_cast<SymbolicRegion>(MR)) | ||||||
1708 | setTrait(SR->getSymbol(), IK); | ||||||
1709 | else | ||||||
1710 | MRTraitsMap[MR] |= IK; | ||||||
1711 | } | ||||||
1712 | |||||||
1713 | bool RegionAndSymbolInvalidationTraits::hasTrait(SymbolRef Sym, | ||||||
1714 | InvalidationKinds IK) const { | ||||||
1715 | const_symbol_iterator I = SymTraitsMap.find(Sym); | ||||||
1716 | if (I != SymTraitsMap.end()) | ||||||
1717 | return I->second & IK; | ||||||
1718 | |||||||
1719 | return false; | ||||||
1720 | } | ||||||
1721 | |||||||
1722 | bool RegionAndSymbolInvalidationTraits::hasTrait(const MemRegion *MR, | ||||||
1723 | InvalidationKinds IK) const { | ||||||
1724 | if (!MR) | ||||||
1725 | return false; | ||||||
1726 | |||||||
1727 | if (const auto *SR = dyn_cast<SymbolicRegion>(MR)) | ||||||
1728 | return hasTrait(SR->getSymbol(), IK); | ||||||
1729 | |||||||
1730 | const_region_iterator I = MRTraitsMap.find(MR); | ||||||
1731 | if (I != MRTraitsMap.end()) | ||||||
1732 | return I->second & IK; | ||||||
1733 | |||||||
1734 | return false; | ||||||
1735 | } |
1 | //===- DeclBase.h - Base Classes for representing declarations --*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the Decl and DeclContext interfaces. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_DECLBASE_H |
14 | #define LLVM_CLANG_AST_DECLBASE_H |
15 | |
16 | #include "clang/AST/ASTDumperUtils.h" |
17 | #include "clang/AST/AttrIterator.h" |
18 | #include "clang/AST/DeclarationName.h" |
19 | #include "clang/Basic/IdentifierTable.h" |
20 | #include "clang/Basic/LLVM.h" |
21 | #include "clang/Basic/SourceLocation.h" |
22 | #include "clang/Basic/Specifiers.h" |
23 | #include "llvm/ADT/ArrayRef.h" |
24 | #include "llvm/ADT/PointerIntPair.h" |
25 | #include "llvm/ADT/PointerUnion.h" |
26 | #include "llvm/ADT/iterator.h" |
27 | #include "llvm/ADT/iterator_range.h" |
28 | #include "llvm/Support/Casting.h" |
29 | #include "llvm/Support/Compiler.h" |
30 | #include "llvm/Support/PrettyStackTrace.h" |
31 | #include "llvm/Support/VersionTuple.h" |
32 | #include <algorithm> |
33 | #include <cassert> |
34 | #include <cstddef> |
35 | #include <iterator> |
36 | #include <string> |
37 | #include <type_traits> |
38 | #include <utility> |
39 | |
40 | namespace clang { |
41 | |
42 | class ASTContext; |
43 | class ASTMutationListener; |
44 | class Attr; |
45 | class BlockDecl; |
46 | class DeclContext; |
47 | class ExternalSourceSymbolAttr; |
48 | class FunctionDecl; |
49 | class FunctionType; |
50 | class IdentifierInfo; |
51 | enum Linkage : unsigned char; |
52 | class LinkageSpecDecl; |
53 | class Module; |
54 | class NamedDecl; |
55 | class ObjCCategoryDecl; |
56 | class ObjCCategoryImplDecl; |
57 | class ObjCContainerDecl; |
58 | class ObjCImplDecl; |
59 | class ObjCImplementationDecl; |
60 | class ObjCInterfaceDecl; |
61 | class ObjCMethodDecl; |
62 | class ObjCProtocolDecl; |
63 | struct PrintingPolicy; |
64 | class RecordDecl; |
65 | class SourceManager; |
66 | class Stmt; |
67 | class StoredDeclsMap; |
68 | class TemplateDecl; |
69 | class TemplateParameterList; |
70 | class TranslationUnitDecl; |
71 | class UsingDirectiveDecl; |
72 | |
73 | /// Captures the result of checking the availability of a |
74 | /// declaration. |
75 | enum AvailabilityResult { |
76 | AR_Available = 0, |
77 | AR_NotYetIntroduced, |
78 | AR_Deprecated, |
79 | AR_Unavailable |
80 | }; |
81 | |
82 | /// Decl - This represents one declaration (or definition), e.g. a variable, |
83 | /// typedef, function, struct, etc. |
84 | /// |
85 | /// Note: There are objects tacked on before the *beginning* of Decl |
86 | /// (and its subclasses) in its Decl::operator new(). Proper alignment |
87 | /// of all subclasses (not requiring more than the alignment of Decl) is |
88 | /// asserted in DeclBase.cpp. |
89 | class alignas(8) Decl { |
90 | public: |
91 | /// Lists the kind of concrete classes of Decl. |
92 | enum Kind { |
93 | #define DECL(DERIVED, BASE) DERIVED, |
94 | #define ABSTRACT_DECL(DECL) |
95 | #define DECL_RANGE(BASE, START, END) \ |
96 | first##BASE = START, last##BASE = END, |
97 | #define LAST_DECL_RANGE(BASE, START, END) \ |
98 | first##BASE = START, last##BASE = END |
99 | #include "clang/AST/DeclNodes.inc" |
100 | }; |
101 | |
102 | /// A placeholder type used to construct an empty shell of a |
103 | /// decl-derived type that will be filled in later (e.g., by some |
104 | /// deserialization method). |
105 | struct EmptyShell {}; |
106 | |
107 | /// IdentifierNamespace - The different namespaces in which |
108 | /// declarations may appear. According to C99 6.2.3, there are |
109 | /// four namespaces, labels, tags, members and ordinary |
110 | /// identifiers. C++ describes lookup completely differently: |
111 | /// certain lookups merely "ignore" certain kinds of declarations, |
112 | /// usually based on whether the declaration is of a type, etc. |
113 | /// |
114 | /// These are meant as bitmasks, so that searches in |
115 | /// C++ can look into the "tag" namespace during ordinary lookup. |
116 | /// |
117 | /// Decl currently provides 15 bits of IDNS bits. |
118 | enum IdentifierNamespace { |
119 | /// Labels, declared with 'x:' and referenced with 'goto x'. |
120 | IDNS_Label = 0x0001, |
121 | |
122 | /// Tags, declared with 'struct foo;' and referenced with |
123 | /// 'struct foo'. All tags are also types. This is what |
124 | /// elaborated-type-specifiers look for in C. |
125 | /// This also contains names that conflict with tags in the |
126 | /// same scope but that are otherwise ordinary names (non-type |
127 | /// template parameters and indirect field declarations). |
128 | IDNS_Tag = 0x0002, |
129 | |
130 | /// Types, declared with 'struct foo', typedefs, etc. |
131 | /// This is what elaborated-type-specifiers look for in C++, |
132 | /// but note that it's ill-formed to find a non-tag. |
133 | IDNS_Type = 0x0004, |
134 | |
135 | /// Members, declared with object declarations within tag |
136 | /// definitions. In C, these can only be found by "qualified" |
137 | /// lookup in member expressions. In C++, they're found by |
138 | /// normal lookup. |
139 | IDNS_Member = 0x0008, |
140 | |
141 | /// Namespaces, declared with 'namespace foo {}'. |
142 | /// Lookup for nested-name-specifiers find these. |
143 | IDNS_Namespace = 0x0010, |
144 | |
145 | /// Ordinary names. In C, everything that's not a label, tag, |
146 | /// member, or function-local extern ends up here. |
147 | IDNS_Ordinary = 0x0020, |
148 | |
149 | /// Objective C \@protocol. |
150 | IDNS_ObjCProtocol = 0x0040, |
151 | |
152 | /// This declaration is a friend function. A friend function |
153 | /// declaration is always in this namespace but may also be in |
154 | /// IDNS_Ordinary if it was previously declared. |
155 | IDNS_OrdinaryFriend = 0x0080, |
156 | |
157 | /// This declaration is a friend class. A friend class |
158 | /// declaration is always in this namespace but may also be in |
159 | /// IDNS_Tag|IDNS_Type if it was previously declared. |
160 | IDNS_TagFriend = 0x0100, |
161 | |
162 | /// This declaration is a using declaration. A using declaration |
163 | /// *introduces* a number of other declarations into the current |
164 | /// scope, and those declarations use the IDNS of their targets, |
165 | /// but the actual using declarations go in this namespace. |
166 | IDNS_Using = 0x0200, |
167 | |
168 | /// This declaration is a C++ operator declared in a non-class |
169 | /// context. All such operators are also in IDNS_Ordinary. |
170 | /// C++ lexical operator lookup looks for these. |
171 | IDNS_NonMemberOperator = 0x0400, |
172 | |
173 | /// This declaration is a function-local extern declaration of a |
174 | /// variable or function. This may also be IDNS_Ordinary if it |
175 | /// has been declared outside any function. These act mostly like |
176 | /// invisible friend declarations, but are also visible to unqualified |
177 | /// lookup within the scope of the declaring function. |
178 | IDNS_LocalExtern = 0x0800, |
179 | |
180 | /// This declaration is an OpenMP user defined reduction construction. |
181 | IDNS_OMPReduction = 0x1000, |
182 | |
183 | /// This declaration is an OpenMP user defined mapper. |
184 | IDNS_OMPMapper = 0x2000, |
185 | }; |
186 | |
187 | /// ObjCDeclQualifier - 'Qualifiers' written next to the return and |
188 | /// parameter types in method declarations. Other than remembering |
189 | /// them and mangling them into the method's signature string, these |
190 | /// are ignored by the compiler; they are consumed by certain |
191 | /// remote-messaging frameworks. |
192 | /// |
193 | /// in, inout, and out are mutually exclusive and apply only to |
194 | /// method parameters. bycopy and byref are mutually exclusive and |
195 | /// apply only to method parameters (?). oneway applies only to |
196 | /// results. All of these expect their corresponding parameter to |
197 | /// have a particular type. None of this is currently enforced by |
198 | /// clang. |
199 | /// |
200 | /// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier. |
201 | enum ObjCDeclQualifier { |
202 | OBJC_TQ_None = 0x0, |
203 | OBJC_TQ_In = 0x1, |
204 | OBJC_TQ_Inout = 0x2, |
205 | OBJC_TQ_Out = 0x4, |
206 | OBJC_TQ_Bycopy = 0x8, |
207 | OBJC_TQ_Byref = 0x10, |
208 | OBJC_TQ_Oneway = 0x20, |
209 | |
210 | /// The nullability qualifier is set when the nullability of the |
211 | /// result or parameter was expressed via a context-sensitive |
212 | /// keyword. |
213 | OBJC_TQ_CSNullability = 0x40 |
214 | }; |
215 | |
216 | /// The kind of ownership a declaration has, for visibility purposes. |
217 | /// This enumeration is designed such that higher values represent higher |
218 | /// levels of name hiding. |
219 | enum class ModuleOwnershipKind : unsigned { |
220 | /// This declaration is not owned by a module. |
221 | Unowned, |
222 | |
223 | /// This declaration has an owning module, but is globally visible |
224 | /// (typically because its owning module is visible and we know that |
225 | /// modules cannot later become hidden in this compilation). |
226 | /// After serialization and deserialization, this will be converted |
227 | /// to VisibleWhenImported. |
228 | Visible, |
229 | |
230 | /// This declaration has an owning module, and is visible when that |
231 | /// module is imported. |
232 | VisibleWhenImported, |
233 | |
234 | /// This declaration has an owning module, but is only visible to |
235 | /// lookups that occur within that module. |
236 | ModulePrivate |
237 | }; |
238 | |
239 | protected: |
240 | /// The next declaration within the same lexical |
241 | /// DeclContext. These pointers form the linked list that is |
242 | /// traversed via DeclContext's decls_begin()/decls_end(). |
243 | /// |
244 | /// The extra two bits are used for the ModuleOwnershipKind. |
245 | llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits; |
246 | |
247 | private: |
248 | friend class DeclContext; |
249 | |
250 | struct MultipleDC { |
251 | DeclContext *SemanticDC; |
252 | DeclContext *LexicalDC; |
253 | }; |
254 | |
255 | /// DeclCtx - Holds either a DeclContext* or a MultipleDC*. |
256 | /// For declarations that don't contain C++ scope specifiers, it contains |
257 | /// the DeclContext where the Decl was declared. |
258 | /// For declarations with C++ scope specifiers, it contains a MultipleDC* |
259 | /// with the context where it semantically belongs (SemanticDC) and the |
260 | /// context where it was lexically declared (LexicalDC). |
261 | /// e.g.: |
262 | /// |
263 | /// namespace A { |
264 | /// void f(); // SemanticDC == LexicalDC == 'namespace A' |
265 | /// } |
266 | /// void A::f(); // SemanticDC == namespace 'A' |
267 | /// // LexicalDC == global namespace |
268 | llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx; |
269 | |
270 | bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); } |
271 | bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); } |
272 | |
273 | MultipleDC *getMultipleDC() const { |
274 | return DeclCtx.get<MultipleDC*>(); |
275 | } |
276 | |
277 | DeclContext *getSemanticDC() const { |
278 | return DeclCtx.get<DeclContext*>(); |
279 | } |
280 | |
281 | /// Loc - The location of this decl. |
282 | SourceLocation Loc; |
283 | |
284 | /// DeclKind - This indicates which class this is. |
285 | unsigned DeclKind : 7; |
286 | |
287 | /// InvalidDecl - This indicates a semantic error occurred. |
288 | unsigned InvalidDecl : 1; |
289 | |
290 | /// HasAttrs - This indicates whether the decl has attributes or not. |
291 | unsigned HasAttrs : 1; |
292 | |
293 | /// Implicit - Whether this declaration was implicitly generated by |
294 | /// the implementation rather than explicitly written by the user. |
295 | unsigned Implicit : 1; |
296 | |
297 | /// Whether this declaration was "used", meaning that a definition is |
298 | /// required. |
299 | unsigned Used : 1; |
300 | |
301 | /// Whether this declaration was "referenced". |
302 | /// The difference with 'Used' is whether the reference appears in a |
303 | /// evaluated context or not, e.g. functions used in uninstantiated templates |
304 | /// are regarded as "referenced" but not "used". |
305 | unsigned Referenced : 1; |
306 | |
307 | /// Whether this declaration is a top-level declaration (function, |
308 | /// global variable, etc.) that is lexically inside an objc container |
309 | /// definition. |
310 | unsigned TopLevelDeclInObjCContainer : 1; |
311 | |
312 | /// Whether statistic collection is enabled. |
313 | static bool StatisticsEnabled; |
314 | |
315 | protected: |
316 | friend class ASTDeclReader; |
317 | friend class ASTDeclWriter; |
318 | friend class ASTNodeImporter; |
319 | friend class ASTReader; |
320 | friend class CXXClassMemberWrapper; |
321 | friend class LinkageComputer; |
322 | template<typename decl_type> friend class Redeclarable; |
323 | |
324 | /// Access - Used by C++ decls for the access specifier. |
325 | // NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum |
326 | unsigned Access : 2; |
327 | |
328 | /// Whether this declaration was loaded from an AST file. |
329 | unsigned FromASTFile : 1; |
330 | |
331 | /// IdentifierNamespace - This specifies what IDNS_* namespace this lives in. |
332 | unsigned IdentifierNamespace : 14; |
333 | |
334 | /// If 0, we have not computed the linkage of this declaration. |
335 | /// Otherwise, it is the linkage + 1. |
336 | mutable unsigned CacheValidAndLinkage : 3; |
337 | |
338 | /// Allocate memory for a deserialized declaration. |
339 | /// |
340 | /// This routine must be used to allocate memory for any declaration that is |
341 | /// deserialized from a module file. |
342 | /// |
343 | /// \param Size The size of the allocated object. |
344 | /// \param Ctx The context in which we will allocate memory. |
345 | /// \param ID The global ID of the deserialized declaration. |
346 | /// \param Extra The amount of extra space to allocate after the object. |
347 | void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID, |
348 | std::size_t Extra = 0); |
349 | |
350 | /// Allocate memory for a non-deserialized declaration. |
351 | void *operator new(std::size_t Size, const ASTContext &Ctx, |
352 | DeclContext *Parent, std::size_t Extra = 0); |
353 | |
354 | private: |
355 | bool AccessDeclContextSanity() const; |
356 | |
357 | /// Get the module ownership kind to use for a local lexical child of \p DC, |
358 | /// which may be either a local or (rarely) an imported declaration. |
359 | static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) { |
360 | if (DC) { |
361 | auto *D = cast<Decl>(DC); |
362 | auto MOK = D->getModuleOwnershipKind(); |
363 | if (MOK != ModuleOwnershipKind::Unowned && |
364 | (!D->isFromASTFile() || D->hasLocalOwningModuleStorage())) |
365 | return MOK; |
366 | // If D is not local and we have no local module storage, then we don't |
367 | // need to track module ownership at all. |
368 | } |
369 | return ModuleOwnershipKind::Unowned; |
370 | } |
371 | |
372 | public: |
373 | Decl() = delete; |
374 | Decl(const Decl&) = delete; |
375 | Decl(Decl &&) = delete; |
376 | Decl &operator=(const Decl&) = delete; |
377 | Decl &operator=(Decl&&) = delete; |
378 | |
379 | protected: |
380 | Decl(Kind DK, DeclContext *DC, SourceLocation L) |
381 | : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)), |
382 | DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false), |
383 | Implicit(false), Used(false), Referenced(false), |
384 | TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0), |
385 | IdentifierNamespace(getIdentifierNamespaceForKind(DK)), |
386 | CacheValidAndLinkage(0) { |
387 | if (StatisticsEnabled) add(DK); |
388 | } |
389 | |
390 | Decl(Kind DK, EmptyShell Empty) |
391 | : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false), |
392 | Used(false), Referenced(false), TopLevelDeclInObjCContainer(false), |
393 | Access(AS_none), FromASTFile(0), |
394 | IdentifierNamespace(getIdentifierNamespaceForKind(DK)), |
395 | CacheValidAndLinkage(0) { |
396 | if (StatisticsEnabled) add(DK); |
397 | } |
398 | |
399 | virtual ~Decl(); |
400 | |
401 | /// Update a potentially out-of-date declaration. |
402 | void updateOutOfDate(IdentifierInfo &II) const; |
403 | |
404 | Linkage getCachedLinkage() const { |
405 | return Linkage(CacheValidAndLinkage - 1); |
406 | } |
407 | |
408 | void setCachedLinkage(Linkage L) const { |
409 | CacheValidAndLinkage = L + 1; |
410 | } |
411 | |
412 | bool hasCachedLinkage() const { |
413 | return CacheValidAndLinkage; |
414 | } |
415 | |
416 | public: |
417 | /// Source range that this declaration covers. |
418 | virtual SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
419 | return SourceRange(getLocation(), getLocation()); |
420 | } |
421 | |
422 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
423 | return getSourceRange().getBegin(); |
424 | } |
425 | |
426 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
427 | return getSourceRange().getEnd(); |
428 | } |
429 | |
430 | SourceLocation getLocation() const { return Loc; } |
431 | void setLocation(SourceLocation L) { Loc = L; } |
432 | |
433 | Kind getKind() const { return static_cast<Kind>(DeclKind); } |
434 | const char *getDeclKindName() const; |
435 | |
436 | Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); } |
437 | const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();} |
438 | |
439 | DeclContext *getDeclContext() { |
440 | if (isInSemaDC()) |
441 | return getSemanticDC(); |
442 | return getMultipleDC()->SemanticDC; |
443 | } |
444 | const DeclContext *getDeclContext() const { |
445 | return const_cast<Decl*>(this)->getDeclContext(); |
446 | } |
447 | |
448 | /// Find the innermost non-closure ancestor of this declaration, |
449 | /// walking up through blocks, lambdas, etc. If that ancestor is |
450 | /// not a code context (!isFunctionOrMethod()), returns null. |
451 | /// |
452 | /// A declaration may be its own non-closure context. |
453 | Decl *getNonClosureContext(); |
454 | const Decl *getNonClosureContext() const { |
455 | return const_cast<Decl*>(this)->getNonClosureContext(); |
456 | } |
457 | |
458 | TranslationUnitDecl *getTranslationUnitDecl(); |
459 | const TranslationUnitDecl *getTranslationUnitDecl() const { |
460 | return const_cast<Decl*>(this)->getTranslationUnitDecl(); |
461 | } |
462 | |
463 | bool isInAnonymousNamespace() const; |
464 | |
465 | bool isInStdNamespace() const; |
466 | |
467 | ASTContext &getASTContext() const LLVM_READONLY__attribute__((__pure__)); |
468 | |
469 | /// Helper to get the language options from the ASTContext. |
470 | /// Defined out of line to avoid depending on ASTContext.h. |
471 | const LangOptions &getLangOpts() const LLVM_READONLY__attribute__((__pure__)); |
472 | |
473 | void setAccess(AccessSpecifier AS) { |
474 | Access = AS; |
475 | assert(AccessDeclContextSanity())((AccessDeclContextSanity()) ? static_cast<void> (0) : __assert_fail ("AccessDeclContextSanity()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 475, __PRETTY_FUNCTION__)); |
476 | } |
477 | |
478 | AccessSpecifier getAccess() const { |
479 | assert(AccessDeclContextSanity())((AccessDeclContextSanity()) ? static_cast<void> (0) : __assert_fail ("AccessDeclContextSanity()", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 479, __PRETTY_FUNCTION__)); |
480 | return AccessSpecifier(Access); |
481 | } |
482 | |
483 | /// Retrieve the access specifier for this declaration, even though |
484 | /// it may not yet have been properly set. |
485 | AccessSpecifier getAccessUnsafe() const { |
486 | return AccessSpecifier(Access); |
487 | } |
488 | |
489 | bool hasAttrs() const { return HasAttrs; } |
490 | |
491 | void setAttrs(const AttrVec& Attrs) { |
492 | return setAttrsImpl(Attrs, getASTContext()); |
493 | } |
494 | |
495 | AttrVec &getAttrs() { |
496 | return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs()); |
497 | } |
498 | |
499 | const AttrVec &getAttrs() const; |
500 | void dropAttrs(); |
501 | void addAttr(Attr *A); |
502 | |
503 | using attr_iterator = AttrVec::const_iterator; |
504 | using attr_range = llvm::iterator_range<attr_iterator>; |
505 | |
506 | attr_range attrs() const { |
507 | return attr_range(attr_begin(), attr_end()); |
508 | } |
509 | |
510 | attr_iterator attr_begin() const { |
511 | return hasAttrs() ? getAttrs().begin() : nullptr; |
512 | } |
513 | attr_iterator attr_end() const { |
514 | return hasAttrs() ? getAttrs().end() : nullptr; |
515 | } |
516 | |
517 | template <typename T> |
518 | void dropAttr() { |
519 | if (!HasAttrs) return; |
520 | |
521 | AttrVec &Vec = getAttrs(); |
522 | llvm::erase_if(Vec, [](Attr *A) { return isa<T>(A); }); |
523 | |
524 | if (Vec.empty()) |
525 | HasAttrs = false; |
526 | } |
527 | |
528 | template <typename T> |
529 | llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const { |
530 | return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>()); |
531 | } |
532 | |
533 | template <typename T> |
534 | specific_attr_iterator<T> specific_attr_begin() const { |
535 | return specific_attr_iterator<T>(attr_begin()); |
536 | } |
537 | |
538 | template <typename T> |
539 | specific_attr_iterator<T> specific_attr_end() const { |
540 | return specific_attr_iterator<T>(attr_end()); |
541 | } |
542 | |
543 | template<typename T> T *getAttr() const { |
544 | return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr; |
545 | } |
546 | |
547 | template<typename T> bool hasAttr() const { |
548 | return hasAttrs() && hasSpecificAttr<T>(getAttrs()); |
549 | } |
550 | |
551 | /// getMaxAlignment - return the maximum alignment specified by attributes |
552 | /// on this decl, 0 if there are none. |
553 | unsigned getMaxAlignment() const; |
554 | |
555 | /// setInvalidDecl - Indicates the Decl had a semantic error. This |
556 | /// allows for graceful error recovery. |
557 | void setInvalidDecl(bool Invalid = true); |
558 | bool isInvalidDecl() const { return (bool) InvalidDecl; } |
559 | |
560 | /// isImplicit - Indicates whether the declaration was implicitly |
561 | /// generated by the implementation. If false, this declaration |
562 | /// was written explicitly in the source code. |
563 | bool isImplicit() const { return Implicit; } |
564 | void setImplicit(bool I = true) { Implicit = I; } |
565 | |
566 | /// Whether *any* (re-)declaration of the entity was used, meaning that |
567 | /// a definition is required. |
568 | /// |
569 | /// \param CheckUsedAttr When true, also consider the "used" attribute |
570 | /// (in addition to the "used" bit set by \c setUsed()) when determining |
571 | /// whether the function is used. |
572 | bool isUsed(bool CheckUsedAttr = true) const; |
573 | |
574 | /// Set whether the declaration is used, in the sense of odr-use. |
575 | /// |
576 | /// This should only be used immediately after creating a declaration. |
577 | /// It intentionally doesn't notify any listeners. |
578 | void setIsUsed() { getCanonicalDecl()->Used = true; } |
579 | |
580 | /// Mark the declaration used, in the sense of odr-use. |
581 | /// |
582 | /// This notifies any mutation listeners in addition to setting a bit |
583 | /// indicating the declaration is used. |
584 | void markUsed(ASTContext &C); |
585 | |
586 | /// Whether any declaration of this entity was referenced. |
587 | bool isReferenced() const; |
588 | |
589 | /// Whether this declaration was referenced. This should not be relied |
590 | /// upon for anything other than debugging. |
591 | bool isThisDeclarationReferenced() const { return Referenced; } |
592 | |
593 | void setReferenced(bool R = true) { Referenced = R; } |
594 | |
595 | /// Whether this declaration is a top-level declaration (function, |
596 | /// global variable, etc.) that is lexically inside an objc container |
597 | /// definition. |
598 | bool isTopLevelDeclInObjCContainer() const { |
599 | return TopLevelDeclInObjCContainer; |
600 | } |
601 | |
602 | void setTopLevelDeclInObjCContainer(bool V = true) { |
603 | TopLevelDeclInObjCContainer = V; |
604 | } |
605 | |
606 | /// Looks on this and related declarations for an applicable |
607 | /// external source symbol attribute. |
608 | ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const; |
609 | |
610 | /// Whether this declaration was marked as being private to the |
611 | /// module in which it was defined. |
612 | bool isModulePrivate() const { |
613 | return getModuleOwnershipKind() == ModuleOwnershipKind::ModulePrivate; |
614 | } |
615 | |
616 | /// Return true if this declaration has an attribute which acts as |
617 | /// definition of the entity, such as 'alias' or 'ifunc'. |
618 | bool hasDefiningAttr() const; |
619 | |
620 | /// Return this declaration's defining attribute if it has one. |
621 | const Attr *getDefiningAttr() const; |
622 | |
623 | protected: |
624 | /// Specify that this declaration was marked as being private |
625 | /// to the module in which it was defined. |
626 | void setModulePrivate() { |
627 | // The module-private specifier has no effect on unowned declarations. |
628 | // FIXME: We should track this in some way for source fidelity. |
629 | if (getModuleOwnershipKind() == ModuleOwnershipKind::Unowned) |
630 | return; |
631 | setModuleOwnershipKind(ModuleOwnershipKind::ModulePrivate); |
632 | } |
633 | |
634 | public: |
635 | /// Set the FromASTFile flag. This indicates that this declaration |
636 | /// was deserialized and not parsed from source code and enables |
637 | /// features such as module ownership information. |
638 | void setFromASTFile() { |
639 | FromASTFile = true; |
640 | } |
641 | |
642 | /// Set the owning module ID. This may only be called for |
643 | /// deserialized Decls. |
644 | void setOwningModuleID(unsigned ID) { |
645 | assert(isFromASTFile() && "Only works on a deserialized declaration")((isFromASTFile() && "Only works on a deserialized declaration" ) ? static_cast<void> (0) : __assert_fail ("isFromASTFile() && \"Only works on a deserialized declaration\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 645, __PRETTY_FUNCTION__)); |
646 | *((unsigned*)this - 2) = ID; |
647 | } |
648 | |
649 | public: |
650 | /// Determine the availability of the given declaration. |
651 | /// |
652 | /// This routine will determine the most restrictive availability of |
653 | /// the given declaration (e.g., preferring 'unavailable' to |
654 | /// 'deprecated'). |
655 | /// |
656 | /// \param Message If non-NULL and the result is not \c |
657 | /// AR_Available, will be set to a (possibly empty) message |
658 | /// describing why the declaration has not been introduced, is |
659 | /// deprecated, or is unavailable. |
660 | /// |
661 | /// \param EnclosingVersion The version to compare with. If empty, assume the |
662 | /// deployment target version. |
663 | /// |
664 | /// \param RealizedPlatform If non-NULL and the availability result is found |
665 | /// in an available attribute it will set to the platform which is written in |
666 | /// the available attribute. |
667 | AvailabilityResult |
668 | getAvailability(std::string *Message = nullptr, |
669 | VersionTuple EnclosingVersion = VersionTuple(), |
670 | StringRef *RealizedPlatform = nullptr) const; |
671 | |
672 | /// Retrieve the version of the target platform in which this |
673 | /// declaration was introduced. |
674 | /// |
675 | /// \returns An empty version tuple if this declaration has no 'introduced' |
676 | /// availability attributes, or the version tuple that's specified in the |
677 | /// attribute otherwise. |
678 | VersionTuple getVersionIntroduced() const; |
679 | |
680 | /// Determine whether this declaration is marked 'deprecated'. |
681 | /// |
682 | /// \param Message If non-NULL and the declaration is deprecated, |
683 | /// this will be set to the message describing why the declaration |
684 | /// was deprecated (which may be empty). |
685 | bool isDeprecated(std::string *Message = nullptr) const { |
686 | return getAvailability(Message) == AR_Deprecated; |
687 | } |
688 | |
689 | /// Determine whether this declaration is marked 'unavailable'. |
690 | /// |
691 | /// \param Message If non-NULL and the declaration is unavailable, |
692 | /// this will be set to the message describing why the declaration |
693 | /// was made unavailable (which may be empty). |
694 | bool isUnavailable(std::string *Message = nullptr) const { |
695 | return getAvailability(Message) == AR_Unavailable; |
696 | } |
697 | |
698 | /// Determine whether this is a weak-imported symbol. |
699 | /// |
700 | /// Weak-imported symbols are typically marked with the |
701 | /// 'weak_import' attribute, but may also be marked with an |
702 | /// 'availability' attribute where we're targing a platform prior to |
703 | /// the introduction of this feature. |
704 | bool isWeakImported() const; |
705 | |
706 | /// Determines whether this symbol can be weak-imported, |
707 | /// e.g., whether it would be well-formed to add the weak_import |
708 | /// attribute. |
709 | /// |
710 | /// \param IsDefinition Set to \c true to indicate that this |
711 | /// declaration cannot be weak-imported because it has a definition. |
712 | bool canBeWeakImported(bool &IsDefinition) const; |
713 | |
714 | /// Determine whether this declaration came from an AST file (such as |
715 | /// a precompiled header or module) rather than having been parsed. |
716 | bool isFromASTFile() const { return FromASTFile; } |
717 | |
718 | /// Retrieve the global declaration ID associated with this |
719 | /// declaration, which specifies where this Decl was loaded from. |
720 | unsigned getGlobalID() const { |
721 | if (isFromASTFile()) |
722 | return *((const unsigned*)this - 1); |
723 | return 0; |
724 | } |
725 | |
726 | /// Retrieve the global ID of the module that owns this particular |
727 | /// declaration. |
728 | unsigned getOwningModuleID() const { |
729 | if (isFromASTFile()) |
730 | return *((const unsigned*)this - 2); |
731 | return 0; |
732 | } |
733 | |
734 | private: |
735 | Module *getOwningModuleSlow() const; |
736 | |
737 | protected: |
738 | bool hasLocalOwningModuleStorage() const; |
739 | |
740 | public: |
741 | /// Get the imported owning module, if this decl is from an imported |
742 | /// (non-local) module. |
743 | Module *getImportedOwningModule() const { |
744 | if (!isFromASTFile() || !hasOwningModule()) |
745 | return nullptr; |
746 | |
747 | return getOwningModuleSlow(); |
748 | } |
749 | |
750 | /// Get the local owning module, if known. Returns nullptr if owner is |
751 | /// not yet known or declaration is not from a module. |
752 | Module *getLocalOwningModule() const { |
753 | if (isFromASTFile() || !hasOwningModule()) |
754 | return nullptr; |
755 | |
756 | assert(hasLocalOwningModuleStorage() &&((hasLocalOwningModuleStorage() && "owned local decl but no local module storage" ) ? static_cast<void> (0) : __assert_fail ("hasLocalOwningModuleStorage() && \"owned local decl but no local module storage\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 757, __PRETTY_FUNCTION__)) |
757 | "owned local decl but no local module storage")((hasLocalOwningModuleStorage() && "owned local decl but no local module storage" ) ? static_cast<void> (0) : __assert_fail ("hasLocalOwningModuleStorage() && \"owned local decl but no local module storage\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 757, __PRETTY_FUNCTION__)); |
758 | return reinterpret_cast<Module *const *>(this)[-1]; |
759 | } |
760 | void setLocalOwningModule(Module *M) { |
761 | assert(!isFromASTFile() && hasOwningModule() &&((!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage () && "should not have a cached owning module") ? static_cast <void> (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 763, __PRETTY_FUNCTION__)) |
762 | hasLocalOwningModuleStorage() &&((!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage () && "should not have a cached owning module") ? static_cast <void> (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 763, __PRETTY_FUNCTION__)) |
763 | "should not have a cached owning module")((!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage () && "should not have a cached owning module") ? static_cast <void> (0) : __assert_fail ("!isFromASTFile() && hasOwningModule() && hasLocalOwningModuleStorage() && \"should not have a cached owning module\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 763, __PRETTY_FUNCTION__)); |
764 | reinterpret_cast<Module **>(this)[-1] = M; |
765 | } |
766 | |
767 | /// Is this declaration owned by some module? |
768 | bool hasOwningModule() const { |
769 | return getModuleOwnershipKind() != ModuleOwnershipKind::Unowned; |
770 | } |
771 | |
772 | /// Get the module that owns this declaration (for visibility purposes). |
773 | Module *getOwningModule() const { |
774 | return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule(); |
775 | } |
776 | |
777 | /// Get the module that owns this declaration for linkage purposes. |
778 | /// There only ever is such a module under the C++ Modules TS. |
779 | /// |
780 | /// \param IgnoreLinkage Ignore the linkage of the entity; assume that |
781 | /// all declarations in a global module fragment are unowned. |
782 | Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const; |
783 | |
784 | /// Determine whether this declaration is definitely visible to name lookup, |
785 | /// independent of whether the owning module is visible. |
786 | /// Note: The declaration may be visible even if this returns \c false if the |
787 | /// owning module is visible within the query context. This is a low-level |
788 | /// helper function; most code should be calling Sema::isVisible() instead. |
789 | bool isUnconditionallyVisible() const { |
790 | return (int)getModuleOwnershipKind() <= (int)ModuleOwnershipKind::Visible; |
791 | } |
792 | |
793 | /// Set that this declaration is globally visible, even if it came from a |
794 | /// module that is not visible. |
795 | void setVisibleDespiteOwningModule() { |
796 | if (!isUnconditionallyVisible()) |
797 | setModuleOwnershipKind(ModuleOwnershipKind::Visible); |
798 | } |
799 | |
800 | /// Get the kind of module ownership for this declaration. |
801 | ModuleOwnershipKind getModuleOwnershipKind() const { |
802 | return NextInContextAndBits.getInt(); |
803 | } |
804 | |
805 | /// Set whether this declaration is hidden from name lookup. |
806 | void setModuleOwnershipKind(ModuleOwnershipKind MOK) { |
807 | assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&((!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile () && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? static_cast<void> (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 810, __PRETTY_FUNCTION__)) |
808 | MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&((!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile () && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? static_cast<void> (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 810, __PRETTY_FUNCTION__)) |
809 | !hasLocalOwningModuleStorage()) &&((!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile () && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? static_cast<void> (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 810, __PRETTY_FUNCTION__)) |
810 | "no storage available for owning module for this declaration")((!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile () && !hasLocalOwningModuleStorage()) && "no storage available for owning module for this declaration" ) ? static_cast<void> (0) : __assert_fail ("!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned && MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() && !hasLocalOwningModuleStorage()) && \"no storage available for owning module for this declaration\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 810, __PRETTY_FUNCTION__)); |
811 | NextInContextAndBits.setInt(MOK); |
812 | } |
813 | |
814 | unsigned getIdentifierNamespace() const { |
815 | return IdentifierNamespace; |
816 | } |
817 | |
818 | bool isInIdentifierNamespace(unsigned NS) const { |
819 | return getIdentifierNamespace() & NS; |
820 | } |
821 | |
822 | static unsigned getIdentifierNamespaceForKind(Kind DK); |
823 | |
824 | bool hasTagIdentifierNamespace() const { |
825 | return isTagIdentifierNamespace(getIdentifierNamespace()); |
826 | } |
827 | |
828 | static bool isTagIdentifierNamespace(unsigned NS) { |
829 | // TagDecls have Tag and Type set and may also have TagFriend. |
830 | return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type); |
831 | } |
832 | |
833 | /// getLexicalDeclContext - The declaration context where this Decl was |
834 | /// lexically declared (LexicalDC). May be different from |
835 | /// getDeclContext() (SemanticDC). |
836 | /// e.g.: |
837 | /// |
838 | /// namespace A { |
839 | /// void f(); // SemanticDC == LexicalDC == 'namespace A' |
840 | /// } |
841 | /// void A::f(); // SemanticDC == namespace 'A' |
842 | /// // LexicalDC == global namespace |
843 | DeclContext *getLexicalDeclContext() { |
844 | if (isInSemaDC()) |
845 | return getSemanticDC(); |
846 | return getMultipleDC()->LexicalDC; |
847 | } |
848 | const DeclContext *getLexicalDeclContext() const { |
849 | return const_cast<Decl*>(this)->getLexicalDeclContext(); |
850 | } |
851 | |
852 | /// Determine whether this declaration is declared out of line (outside its |
853 | /// semantic context). |
854 | virtual bool isOutOfLine() const; |
855 | |
856 | /// setDeclContext - Set both the semantic and lexical DeclContext |
857 | /// to DC. |
858 | void setDeclContext(DeclContext *DC); |
859 | |
860 | void setLexicalDeclContext(DeclContext *DC); |
861 | |
862 | /// Determine whether this declaration is a templated entity (whether it is |
863 | // within the scope of a template parameter). |
864 | bool isTemplated() const; |
865 | |
866 | /// Determine the number of levels of template parameter surrounding this |
867 | /// declaration. |
868 | unsigned getTemplateDepth() const; |
869 | |
870 | /// isDefinedOutsideFunctionOrMethod - This predicate returns true if this |
871 | /// scoped decl is defined outside the current function or method. This is |
872 | /// roughly global variables and functions, but also handles enums (which |
873 | /// could be defined inside or outside a function etc). |
874 | bool isDefinedOutsideFunctionOrMethod() const { |
875 | return getParentFunctionOrMethod() == nullptr; |
876 | } |
877 | |
878 | /// Determine whether a substitution into this declaration would occur as |
879 | /// part of a substitution into a dependent local scope. Such a substitution |
880 | /// transitively substitutes into all constructs nested within this |
881 | /// declaration. |
882 | /// |
883 | /// This recognizes non-defining declarations as well as members of local |
884 | /// classes and lambdas: |
885 | /// \code |
886 | /// template<typename T> void foo() { void bar(); } |
887 | /// template<typename T> void foo2() { class ABC { void bar(); }; } |
888 | /// template<typename T> inline int x = [](){ return 0; }(); |
889 | /// \endcode |
890 | bool isInLocalScopeForInstantiation() const; |
891 | |
892 | /// If this decl is defined inside a function/method/block it returns |
893 | /// the corresponding DeclContext, otherwise it returns null. |
894 | const DeclContext *getParentFunctionOrMethod() const; |
895 | DeclContext *getParentFunctionOrMethod() { |
896 | return const_cast<DeclContext*>( |
897 | const_cast<const Decl*>(this)->getParentFunctionOrMethod()); |
898 | } |
899 | |
900 | /// Retrieves the "canonical" declaration of the given declaration. |
901 | virtual Decl *getCanonicalDecl() { return this; } |
902 | const Decl *getCanonicalDecl() const { |
903 | return const_cast<Decl*>(this)->getCanonicalDecl(); |
904 | } |
905 | |
906 | /// Whether this particular Decl is a canonical one. |
907 | bool isCanonicalDecl() const { return getCanonicalDecl() == this; } |
908 | |
909 | protected: |
910 | /// Returns the next redeclaration or itself if this is the only decl. |
911 | /// |
912 | /// Decl subclasses that can be redeclared should override this method so that |
913 | /// Decl::redecl_iterator can iterate over them. |
914 | virtual Decl *getNextRedeclarationImpl() { return this; } |
915 | |
916 | /// Implementation of getPreviousDecl(), to be overridden by any |
917 | /// subclass that has a redeclaration chain. |
918 | virtual Decl *getPreviousDeclImpl() { return nullptr; } |
919 | |
920 | /// Implementation of getMostRecentDecl(), to be overridden by any |
921 | /// subclass that has a redeclaration chain. |
922 | virtual Decl *getMostRecentDeclImpl() { return this; } |
923 | |
924 | public: |
925 | /// Iterates through all the redeclarations of the same decl. |
926 | class redecl_iterator { |
927 | /// Current - The current declaration. |
928 | Decl *Current = nullptr; |
929 | Decl *Starter; |
930 | |
931 | public: |
932 | using value_type = Decl *; |
933 | using reference = const value_type &; |
934 | using pointer = const value_type *; |
935 | using iterator_category = std::forward_iterator_tag; |
936 | using difference_type = std::ptrdiff_t; |
937 | |
938 | redecl_iterator() = default; |
939 | explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {} |
940 | |
941 | reference operator*() const { return Current; } |
942 | value_type operator->() const { return Current; } |
943 | |
944 | redecl_iterator& operator++() { |
945 | assert(Current && "Advancing while iterator has reached end")((Current && "Advancing while iterator has reached end" ) ? static_cast<void> (0) : __assert_fail ("Current && \"Advancing while iterator has reached end\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 945, __PRETTY_FUNCTION__)); |
946 | // Get either previous decl or latest decl. |
947 | Decl *Next = Current->getNextRedeclarationImpl(); |
948 | assert(Next && "Should return next redeclaration or itself, never null!")((Next && "Should return next redeclaration or itself, never null!" ) ? static_cast<void> (0) : __assert_fail ("Next && \"Should return next redeclaration or itself, never null!\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 948, __PRETTY_FUNCTION__)); |
949 | Current = (Next != Starter) ? Next : nullptr; |
950 | return *this; |
951 | } |
952 | |
953 | redecl_iterator operator++(int) { |
954 | redecl_iterator tmp(*this); |
955 | ++(*this); |
956 | return tmp; |
957 | } |
958 | |
959 | friend bool operator==(redecl_iterator x, redecl_iterator y) { |
960 | return x.Current == y.Current; |
961 | } |
962 | |
963 | friend bool operator!=(redecl_iterator x, redecl_iterator y) { |
964 | return x.Current != y.Current; |
965 | } |
966 | }; |
967 | |
968 | using redecl_range = llvm::iterator_range<redecl_iterator>; |
969 | |
970 | /// Returns an iterator range for all the redeclarations of the same |
971 | /// decl. It will iterate at least once (when this decl is the only one). |
972 | redecl_range redecls() const { |
973 | return redecl_range(redecls_begin(), redecls_end()); |
974 | } |
975 | |
976 | redecl_iterator redecls_begin() const { |
977 | return redecl_iterator(const_cast<Decl *>(this)); |
978 | } |
979 | |
980 | redecl_iterator redecls_end() const { return redecl_iterator(); } |
981 | |
982 | /// Retrieve the previous declaration that declares the same entity |
983 | /// as this declaration, or NULL if there is no previous declaration. |
984 | Decl *getPreviousDecl() { return getPreviousDeclImpl(); } |
985 | |
986 | /// Retrieve the previous declaration that declares the same entity |
987 | /// as this declaration, or NULL if there is no previous declaration. |
988 | const Decl *getPreviousDecl() const { |
989 | return const_cast<Decl *>(this)->getPreviousDeclImpl(); |
990 | } |
991 | |
992 | /// True if this is the first declaration in its redeclaration chain. |
993 | bool isFirstDecl() const { |
994 | return getPreviousDecl() == nullptr; |
995 | } |
996 | |
997 | /// Retrieve the most recent declaration that declares the same entity |
998 | /// as this declaration (which may be this declaration). |
999 | Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); } |
1000 | |
1001 | /// Retrieve the most recent declaration that declares the same entity |
1002 | /// as this declaration (which may be this declaration). |
1003 | const Decl *getMostRecentDecl() const { |
1004 | return const_cast<Decl *>(this)->getMostRecentDeclImpl(); |
1005 | } |
1006 | |
1007 | /// getBody - If this Decl represents a declaration for a body of code, |
1008 | /// such as a function or method definition, this method returns the |
1009 | /// top-level Stmt* of that body. Otherwise this method returns null. |
1010 | virtual Stmt* getBody() const { return nullptr; } |
1011 | |
1012 | /// Returns true if this \c Decl represents a declaration for a body of |
1013 | /// code, such as a function or method definition. |
1014 | /// Note that \c hasBody can also return true if any redeclaration of this |
1015 | /// \c Decl represents a declaration for a body of code. |
1016 | virtual bool hasBody() const { return getBody() != nullptr; } |
1017 | |
1018 | /// getBodyRBrace - Gets the right brace of the body, if a body exists. |
1019 | /// This works whether the body is a CompoundStmt or a CXXTryStmt. |
1020 | SourceLocation getBodyRBrace() const; |
1021 | |
1022 | // global temp stats (until we have a per-module visitor) |
1023 | static void add(Kind k); |
1024 | static void EnableStatistics(); |
1025 | static void PrintStats(); |
1026 | |
1027 | /// isTemplateParameter - Determines whether this declaration is a |
1028 | /// template parameter. |
1029 | bool isTemplateParameter() const; |
1030 | |
1031 | /// isTemplateParameter - Determines whether this declaration is a |
1032 | /// template parameter pack. |
1033 | bool isTemplateParameterPack() const; |
1034 | |
1035 | /// Whether this declaration is a parameter pack. |
1036 | bool isParameterPack() const; |
1037 | |
1038 | /// returns true if this declaration is a template |
1039 | bool isTemplateDecl() const; |
1040 | |
1041 | /// Whether this declaration is a function or function template. |
1042 | bool isFunctionOrFunctionTemplate() const { |
1043 | return (DeclKind >= Decl::firstFunction && |
1044 | DeclKind <= Decl::lastFunction) || |
1045 | DeclKind == FunctionTemplate; |
1046 | } |
1047 | |
1048 | /// If this is a declaration that describes some template, this |
1049 | /// method returns that template declaration. |
1050 | /// |
1051 | /// Note that this returns nullptr for partial specializations, because they |
1052 | /// are not modeled as TemplateDecls. Use getDescribedTemplateParams to handle |
1053 | /// those cases. |
1054 | TemplateDecl *getDescribedTemplate() const; |
1055 | |
1056 | /// If this is a declaration that describes some template or partial |
1057 | /// specialization, this returns the corresponding template parameter list. |
1058 | const TemplateParameterList *getDescribedTemplateParams() const; |
1059 | |
1060 | /// Returns the function itself, or the templated function if this is a |
1061 | /// function template. |
1062 | FunctionDecl *getAsFunction() LLVM_READONLY__attribute__((__pure__)); |
1063 | |
1064 | const FunctionDecl *getAsFunction() const { |
1065 | return const_cast<Decl *>(this)->getAsFunction(); |
1066 | } |
1067 | |
1068 | /// Changes the namespace of this declaration to reflect that it's |
1069 | /// a function-local extern declaration. |
1070 | /// |
1071 | /// These declarations appear in the lexical context of the extern |
1072 | /// declaration, but in the semantic context of the enclosing namespace |
1073 | /// scope. |
1074 | void setLocalExternDecl() { |
1075 | Decl *Prev = getPreviousDecl(); |
1076 | IdentifierNamespace &= ~IDNS_Ordinary; |
1077 | |
1078 | // It's OK for the declaration to still have the "invisible friend" flag or |
1079 | // the "conflicts with tag declarations in this scope" flag for the outer |
1080 | // scope. |
1081 | assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&(((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag )) == 0 && "namespace is not ordinary") ? static_cast <void> (0) : __assert_fail ("(IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && \"namespace is not ordinary\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1082, __PRETTY_FUNCTION__)) |
1082 | "namespace is not ordinary")(((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag )) == 0 && "namespace is not ordinary") ? static_cast <void> (0) : __assert_fail ("(IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 && \"namespace is not ordinary\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1082, __PRETTY_FUNCTION__)); |
1083 | |
1084 | IdentifierNamespace |= IDNS_LocalExtern; |
1085 | if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary) |
1086 | IdentifierNamespace |= IDNS_Ordinary; |
1087 | } |
1088 | |
1089 | /// Determine whether this is a block-scope declaration with linkage. |
1090 | /// This will either be a local variable declaration declared 'extern', or a |
1091 | /// local function declaration. |
1092 | bool isLocalExternDecl() { |
1093 | return IdentifierNamespace & IDNS_LocalExtern; |
1094 | } |
1095 | |
1096 | /// Changes the namespace of this declaration to reflect that it's |
1097 | /// the object of a friend declaration. |
1098 | /// |
1099 | /// These declarations appear in the lexical context of the friending |
1100 | /// class, but in the semantic context of the actual entity. This property |
1101 | /// applies only to a specific decl object; other redeclarations of the |
1102 | /// same entity may not (and probably don't) share this property. |
1103 | void setObjectOfFriendDecl(bool PerformFriendInjection = false) { |
1104 | unsigned OldNS = IdentifierNamespace; |
1105 | assert((OldNS & (IDNS_Tag | IDNS_Ordinary |(((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes neither ordinary nor tag" ) ? static_cast<void> (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1108, __PRETTY_FUNCTION__)) |
1106 | IDNS_TagFriend | IDNS_OrdinaryFriend |(((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes neither ordinary nor tag" ) ? static_cast<void> (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1108, __PRETTY_FUNCTION__)) |
1107 | IDNS_LocalExtern | IDNS_NonMemberOperator)) &&(((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes neither ordinary nor tag" ) ? static_cast<void> (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1108, __PRETTY_FUNCTION__)) |
1108 | "namespace includes neither ordinary nor tag")(((OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && "namespace includes neither ordinary nor tag" ) ? static_cast<void> (0) : __assert_fail ("(OldNS & (IDNS_Tag | IDNS_Ordinary | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes neither ordinary nor tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1108, __PRETTY_FUNCTION__)); |
1109 | assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |((!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes other than ordinary or tag" ) ? static_cast<void> (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1112, __PRETTY_FUNCTION__)) |
1110 | IDNS_TagFriend | IDNS_OrdinaryFriend |((!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes other than ordinary or tag" ) ? static_cast<void> (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1112, __PRETTY_FUNCTION__)) |
1111 | IDNS_LocalExtern | IDNS_NonMemberOperator)) &&((!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes other than ordinary or tag" ) ? static_cast<void> (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1112, __PRETTY_FUNCTION__)) |
1112 | "namespace includes other than ordinary or tag")((!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator )) && "namespace includes other than ordinary or tag" ) ? static_cast<void> (0) : __assert_fail ("!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type | IDNS_TagFriend | IDNS_OrdinaryFriend | IDNS_LocalExtern | IDNS_NonMemberOperator)) && \"namespace includes other than ordinary or tag\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1112, __PRETTY_FUNCTION__)); |
1113 | |
1114 | Decl *Prev = getPreviousDecl(); |
1115 | IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type); |
1116 | |
1117 | if (OldNS & (IDNS_Tag | IDNS_TagFriend)) { |
1118 | IdentifierNamespace |= IDNS_TagFriend; |
1119 | if (PerformFriendInjection || |
1120 | (Prev && Prev->getIdentifierNamespace() & IDNS_Tag)) |
1121 | IdentifierNamespace |= IDNS_Tag | IDNS_Type; |
1122 | } |
1123 | |
1124 | if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend | |
1125 | IDNS_LocalExtern | IDNS_NonMemberOperator)) { |
1126 | IdentifierNamespace |= IDNS_OrdinaryFriend; |
1127 | if (PerformFriendInjection || |
1128 | (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)) |
1129 | IdentifierNamespace |= IDNS_Ordinary; |
1130 | } |
1131 | } |
1132 | |
1133 | enum FriendObjectKind { |
1134 | FOK_None, ///< Not a friend object. |
1135 | FOK_Declared, ///< A friend of a previously-declared entity. |
1136 | FOK_Undeclared ///< A friend of a previously-undeclared entity. |
1137 | }; |
1138 | |
1139 | /// Determines whether this declaration is the object of a |
1140 | /// friend declaration and, if so, what kind. |
1141 | /// |
1142 | /// There is currently no direct way to find the associated FriendDecl. |
1143 | FriendObjectKind getFriendObjectKind() const { |
1144 | unsigned mask = |
1145 | (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend)); |
1146 | if (!mask) return FOK_None; |
1147 | return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared |
1148 | : FOK_Undeclared); |
1149 | } |
1150 | |
1151 | /// Specifies that this declaration is a C++ overloaded non-member. |
1152 | void setNonMemberOperator() { |
1153 | assert(getKind() == Function || getKind() == FunctionTemplate)((getKind() == Function || getKind() == FunctionTemplate) ? static_cast <void> (0) : __assert_fail ("getKind() == Function || getKind() == FunctionTemplate" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1153, __PRETTY_FUNCTION__)); |
1154 | assert((IdentifierNamespace & IDNS_Ordinary) &&(((IdentifierNamespace & IDNS_Ordinary) && "visible non-member operators should be in ordinary namespace" ) ? static_cast<void> (0) : __assert_fail ("(IdentifierNamespace & IDNS_Ordinary) && \"visible non-member operators should be in ordinary namespace\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1155, __PRETTY_FUNCTION__)) |
1155 | "visible non-member operators should be in ordinary namespace")(((IdentifierNamespace & IDNS_Ordinary) && "visible non-member operators should be in ordinary namespace" ) ? static_cast<void> (0) : __assert_fail ("(IdentifierNamespace & IDNS_Ordinary) && \"visible non-member operators should be in ordinary namespace\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 1155, __PRETTY_FUNCTION__)); |
1156 | IdentifierNamespace |= IDNS_NonMemberOperator; |
1157 | } |
1158 | |
1159 | static bool classofKind(Kind K) { return true; } |
1160 | static DeclContext *castToDeclContext(const Decl *); |
1161 | static Decl *castFromDeclContext(const DeclContext *); |
1162 | |
1163 | void print(raw_ostream &Out, unsigned Indentation = 0, |
1164 | bool PrintInstantiation = false) const; |
1165 | void print(raw_ostream &Out, const PrintingPolicy &Policy, |
1166 | unsigned Indentation = 0, bool PrintInstantiation = false) const; |
1167 | static void printGroup(Decl** Begin, unsigned NumDecls, |
1168 | raw_ostream &Out, const PrintingPolicy &Policy, |
1169 | unsigned Indentation = 0); |
1170 | |
1171 | // Debuggers don't usually respect default arguments. |
1172 | void dump() const; |
1173 | |
1174 | // Same as dump(), but forces color printing. |
1175 | void dumpColor() const; |
1176 | |
1177 | void dump(raw_ostream &Out, bool Deserialize = false, |
1178 | ASTDumpOutputFormat OutputFormat = ADOF_Default) const; |
1179 | |
1180 | /// \return Unique reproducible object identifier |
1181 | int64_t getID() const; |
1182 | |
1183 | /// Looks through the Decl's underlying type to extract a FunctionType |
1184 | /// when possible. Will return null if the type underlying the Decl does not |
1185 | /// have a FunctionType. |
1186 | const FunctionType *getFunctionType(bool BlocksToo = true) const; |
1187 | |
1188 | private: |
1189 | void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx); |
1190 | void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC, |
1191 | ASTContext &Ctx); |
1192 | |
1193 | protected: |
1194 | ASTMutationListener *getASTMutationListener() const; |
1195 | }; |
1196 | |
1197 | /// Determine whether two declarations declare the same entity. |
1198 | inline bool declaresSameEntity(const Decl *D1, const Decl *D2) { |
1199 | if (!D1 || !D2) |
1200 | return false; |
1201 | |
1202 | if (D1 == D2) |
1203 | return true; |
1204 | |
1205 | return D1->getCanonicalDecl() == D2->getCanonicalDecl(); |
1206 | } |
1207 | |
1208 | /// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when |
1209 | /// doing something to a specific decl. |
1210 | class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry { |
1211 | const Decl *TheDecl; |
1212 | SourceLocation Loc; |
1213 | SourceManager &SM; |
1214 | const char *Message; |
1215 | |
1216 | public: |
1217 | PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L, |
1218 | SourceManager &sm, const char *Msg) |
1219 | : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {} |
1220 | |
1221 | void print(raw_ostream &OS) const override; |
1222 | }; |
1223 | |
1224 | /// The results of name lookup within a DeclContext. This is either a |
1225 | /// single result (with no stable storage) or a collection of results (with |
1226 | /// stable storage provided by the lookup table). |
1227 | class DeclContextLookupResult { |
1228 | using ResultTy = ArrayRef<NamedDecl *>; |
1229 | |
1230 | ResultTy Result; |
1231 | |
1232 | // If there is only one lookup result, it would be invalidated by |
1233 | // reallocations of the name table, so store it separately. |
1234 | NamedDecl *Single = nullptr; |
1235 | |
1236 | static NamedDecl *const SingleElementDummyList; |
1237 | |
1238 | public: |
1239 | DeclContextLookupResult() = default; |
1240 | DeclContextLookupResult(ArrayRef<NamedDecl *> Result) |
1241 | : Result(Result) {} |
1242 | DeclContextLookupResult(NamedDecl *Single) |
1243 | : Result(SingleElementDummyList), Single(Single) {} |
1244 | |
1245 | class iterator; |
1246 | |
1247 | using IteratorBase = |
1248 | llvm::iterator_adaptor_base<iterator, ResultTy::iterator, |
1249 | std::random_access_iterator_tag, NamedDecl *>; |
1250 | |
1251 | class iterator : public IteratorBase { |
1252 | value_type SingleElement; |
1253 | |
1254 | public: |
1255 | explicit iterator(pointer Pos, value_type Single = nullptr) |
1256 | : IteratorBase(Pos), SingleElement(Single) {} |
1257 | |
1258 | reference operator*() const { |
1259 | return SingleElement ? SingleElement : IteratorBase::operator*(); |
1260 | } |
1261 | }; |
1262 | |
1263 | using const_iterator = iterator; |
1264 | using pointer = iterator::pointer; |
1265 | using reference = iterator::reference; |
1266 | |
1267 | iterator begin() const { return iterator(Result.begin(), Single); } |
1268 | iterator end() const { return iterator(Result.end(), Single); } |
1269 | |
1270 | bool empty() const { return Result.empty(); } |
1271 | pointer data() const { return Single ? &Single : Result.data(); } |
1272 | size_t size() const { return Single ? 1 : Result.size(); } |
1273 | reference front() const { return Single ? Single : Result.front(); } |
1274 | reference back() const { return Single ? Single : Result.back(); } |
1275 | reference operator[](size_t N) const { return Single ? Single : Result[N]; } |
1276 | |
1277 | // FIXME: Remove this from the interface |
1278 | DeclContextLookupResult slice(size_t N) const { |
1279 | DeclContextLookupResult Sliced = Result.slice(N); |
1280 | Sliced.Single = Single; |
1281 | return Sliced; |
1282 | } |
1283 | }; |
1284 | |
1285 | /// DeclContext - This is used only as base class of specific decl types that |
1286 | /// can act as declaration contexts. These decls are (only the top classes |
1287 | /// that directly derive from DeclContext are mentioned, not their subclasses): |
1288 | /// |
1289 | /// TranslationUnitDecl |
1290 | /// ExternCContext |
1291 | /// NamespaceDecl |
1292 | /// TagDecl |
1293 | /// OMPDeclareReductionDecl |
1294 | /// OMPDeclareMapperDecl |
1295 | /// FunctionDecl |
1296 | /// ObjCMethodDecl |
1297 | /// ObjCContainerDecl |
1298 | /// LinkageSpecDecl |
1299 | /// ExportDecl |
1300 | /// BlockDecl |
1301 | /// CapturedDecl |
1302 | class DeclContext { |
1303 | /// For makeDeclVisibleInContextImpl |
1304 | friend class ASTDeclReader; |
1305 | /// For reconcileExternalVisibleStorage, CreateStoredDeclsMap, |
1306 | /// hasNeedToReconcileExternalVisibleStorage |
1307 | friend class ExternalASTSource; |
1308 | /// For CreateStoredDeclsMap |
1309 | friend class DependentDiagnostic; |
1310 | /// For hasNeedToReconcileExternalVisibleStorage, |
1311 | /// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups |
1312 | friend class ASTWriter; |
1313 | |
1314 | // We use uint64_t in the bit-fields below since some bit-fields |
1315 | // cross the unsigned boundary and this breaks the packing. |
1316 | |
1317 | /// Stores the bits used by DeclContext. |
1318 | /// If modified NumDeclContextBit, the ctor of DeclContext and the accessor |
1319 | /// methods in DeclContext should be updated appropriately. |
1320 | class DeclContextBitfields { |
1321 | friend class DeclContext; |
1322 | /// DeclKind - This indicates which class this is. |
1323 | uint64_t DeclKind : 7; |
1324 | |
1325 | /// Whether this declaration context also has some external |
1326 | /// storage that contains additional declarations that are lexically |
1327 | /// part of this context. |
1328 | mutable uint64_t ExternalLexicalStorage : 1; |
1329 | |
1330 | /// Whether this declaration context also has some external |
1331 | /// storage that contains additional declarations that are visible |
1332 | /// in this context. |
1333 | mutable uint64_t ExternalVisibleStorage : 1; |
1334 | |
1335 | /// Whether this declaration context has had externally visible |
1336 | /// storage added since the last lookup. In this case, \c LookupPtr's |
1337 | /// invariant may not hold and needs to be fixed before we perform |
1338 | /// another lookup. |
1339 | mutable uint64_t NeedToReconcileExternalVisibleStorage : 1; |
1340 | |
1341 | /// If \c true, this context may have local lexical declarations |
1342 | /// that are missing from the lookup table. |
1343 | mutable uint64_t HasLazyLocalLexicalLookups : 1; |
1344 | |
1345 | /// If \c true, the external source may have lexical declarations |
1346 | /// that are missing from the lookup table. |
1347 | mutable uint64_t HasLazyExternalLexicalLookups : 1; |
1348 | |
1349 | /// If \c true, lookups should only return identifier from |
1350 | /// DeclContext scope (for example TranslationUnit). Used in |
1351 | /// LookupQualifiedName() |
1352 | mutable uint64_t UseQualifiedLookup : 1; |
1353 | }; |
1354 | |
1355 | /// Number of bits in DeclContextBitfields. |
1356 | enum { NumDeclContextBits = 13 }; |
1357 | |
1358 | /// Stores the bits used by TagDecl. |
1359 | /// If modified NumTagDeclBits and the accessor |
1360 | /// methods in TagDecl should be updated appropriately. |
1361 | class TagDeclBitfields { |
1362 | friend class TagDecl; |
1363 | /// For the bits in DeclContextBitfields |
1364 | uint64_t : NumDeclContextBits; |
1365 | |
1366 | /// The TagKind enum. |
1367 | uint64_t TagDeclKind : 3; |
1368 | |
1369 | /// True if this is a definition ("struct foo {};"), false if it is a |
1370 | /// declaration ("struct foo;"). It is not considered a definition |
1371 | /// until the definition has been fully processed. |
1372 | uint64_t IsCompleteDefinition : 1; |
1373 | |
1374 | /// True if this is currently being defined. |
1375 | uint64_t IsBeingDefined : 1; |
1376 | |
1377 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
1378 | /// for the very first time) in the syntax of a declarator. |
1379 | uint64_t IsEmbeddedInDeclarator : 1; |
1380 | |
1381 | /// True if this tag is free standing, e.g. "struct foo;". |
1382 | uint64_t IsFreeStanding : 1; |
1383 | |
1384 | /// Indicates whether it is possible for declarations of this kind |
1385 | /// to have an out-of-date definition. |
1386 | /// |
1387 | /// This option is only enabled when modules are enabled. |
1388 | uint64_t MayHaveOutOfDateDef : 1; |
1389 | |
1390 | /// Has the full definition of this type been required by a use somewhere in |
1391 | /// the TU. |
1392 | uint64_t IsCompleteDefinitionRequired : 1; |
1393 | }; |
1394 | |
1395 | /// Number of non-inherited bits in TagDeclBitfields. |
1396 | enum { NumTagDeclBits = 9 }; |
1397 | |
1398 | /// Stores the bits used by EnumDecl. |
1399 | /// If modified NumEnumDeclBit and the accessor |
1400 | /// methods in EnumDecl should be updated appropriately. |
1401 | class EnumDeclBitfields { |
1402 | friend class EnumDecl; |
1403 | /// For the bits in DeclContextBitfields. |
1404 | uint64_t : NumDeclContextBits; |
1405 | /// For the bits in TagDeclBitfields. |
1406 | uint64_t : NumTagDeclBits; |
1407 | |
1408 | /// Width in bits required to store all the non-negative |
1409 | /// enumerators of this enum. |
1410 | uint64_t NumPositiveBits : 8; |
1411 | |
1412 | /// Width in bits required to store all the negative |
1413 | /// enumerators of this enum. |
1414 | uint64_t NumNegativeBits : 8; |
1415 | |
1416 | /// True if this tag declaration is a scoped enumeration. Only |
1417 | /// possible in C++11 mode. |
1418 | uint64_t IsScoped : 1; |
1419 | |
1420 | /// If this tag declaration is a scoped enum, |
1421 | /// then this is true if the scoped enum was declared using the class |
1422 | /// tag, false if it was declared with the struct tag. No meaning is |
1423 | /// associated if this tag declaration is not a scoped enum. |
1424 | uint64_t IsScopedUsingClassTag : 1; |
1425 | |
1426 | /// True if this is an enumeration with fixed underlying type. Only |
1427 | /// possible in C++11, Microsoft extensions, or Objective C mode. |
1428 | uint64_t IsFixed : 1; |
1429 | |
1430 | /// True if a valid hash is stored in ODRHash. |
1431 | uint64_t HasODRHash : 1; |
1432 | }; |
1433 | |
1434 | /// Number of non-inherited bits in EnumDeclBitfields. |
1435 | enum { NumEnumDeclBits = 20 }; |
1436 | |
1437 | /// Stores the bits used by RecordDecl. |
1438 | /// If modified NumRecordDeclBits and the accessor |
1439 | /// methods in RecordDecl should be updated appropriately. |
1440 | class RecordDeclBitfields { |
1441 | friend class RecordDecl; |
1442 | /// For the bits in DeclContextBitfields. |
1443 | uint64_t : NumDeclContextBits; |
1444 | /// For the bits in TagDeclBitfields. |
1445 | uint64_t : NumTagDeclBits; |
1446 | |
1447 | /// This is true if this struct ends with a flexible |
1448 | /// array member (e.g. int X[]) or if this union contains a struct that does. |
1449 | /// If so, this cannot be contained in arrays or other structs as a member. |
1450 | uint64_t HasFlexibleArrayMember : 1; |
1451 | |
1452 | /// Whether this is the type of an anonymous struct or union. |
1453 | uint64_t AnonymousStructOrUnion : 1; |
1454 | |
1455 | /// This is true if this struct has at least one member |
1456 | /// containing an Objective-C object pointer type. |
1457 | uint64_t HasObjectMember : 1; |
1458 | |
1459 | /// This is true if struct has at least one member of |
1460 | /// 'volatile' type. |
1461 | uint64_t HasVolatileMember : 1; |
1462 | |
1463 | /// Whether the field declarations of this record have been loaded |
1464 | /// from external storage. To avoid unnecessary deserialization of |
1465 | /// methods/nested types we allow deserialization of just the fields |
1466 | /// when needed. |
1467 | mutable uint64_t LoadedFieldsFromExternalStorage : 1; |
1468 | |
1469 | /// Basic properties of non-trivial C structs. |
1470 | uint64_t NonTrivialToPrimitiveDefaultInitialize : 1; |
1471 | uint64_t NonTrivialToPrimitiveCopy : 1; |
1472 | uint64_t NonTrivialToPrimitiveDestroy : 1; |
1473 | |
1474 | /// The following bits indicate whether this is or contains a C union that |
1475 | /// is non-trivial to default-initialize, destruct, or copy. These bits |
1476 | /// imply the associated basic non-triviality predicates declared above. |
1477 | uint64_t HasNonTrivialToPrimitiveDefaultInitializeCUnion : 1; |
1478 | uint64_t HasNonTrivialToPrimitiveDestructCUnion : 1; |
1479 | uint64_t HasNonTrivialToPrimitiveCopyCUnion : 1; |
1480 | |
1481 | /// Indicates whether this struct is destroyed in the callee. |
1482 | uint64_t ParamDestroyedInCallee : 1; |
1483 | |
1484 | /// Represents the way this type is passed to a function. |
1485 | uint64_t ArgPassingRestrictions : 2; |
1486 | }; |
1487 | |
1488 | /// Number of non-inherited bits in RecordDeclBitfields. |
1489 | enum { NumRecordDeclBits = 14 }; |
1490 | |
1491 | /// Stores the bits used by OMPDeclareReductionDecl. |
1492 | /// If modified NumOMPDeclareReductionDeclBits and the accessor |
1493 | /// methods in OMPDeclareReductionDecl should be updated appropriately. |
1494 | class OMPDeclareReductionDeclBitfields { |
1495 | friend class OMPDeclareReductionDecl; |
1496 | /// For the bits in DeclContextBitfields |
1497 | uint64_t : NumDeclContextBits; |
1498 | |
1499 | /// Kind of initializer, |
1500 | /// function call or omp_priv<init_expr> initializtion. |
1501 | uint64_t InitializerKind : 2; |
1502 | }; |
1503 | |
1504 | /// Number of non-inherited bits in OMPDeclareReductionDeclBitfields. |
1505 | enum { NumOMPDeclareReductionDeclBits = 2 }; |
1506 | |
1507 | /// Stores the bits used by FunctionDecl. |
1508 | /// If modified NumFunctionDeclBits and the accessor |
1509 | /// methods in FunctionDecl and CXXDeductionGuideDecl |
1510 | /// (for IsCopyDeductionCandidate) should be updated appropriately. |
1511 | class FunctionDeclBitfields { |
1512 | friend class FunctionDecl; |
1513 | /// For IsCopyDeductionCandidate |
1514 | friend class CXXDeductionGuideDecl; |
1515 | /// For the bits in DeclContextBitfields. |
1516 | uint64_t : NumDeclContextBits; |
1517 | |
1518 | uint64_t SClass : 3; |
1519 | uint64_t IsInline : 1; |
1520 | uint64_t IsInlineSpecified : 1; |
1521 | |
1522 | uint64_t IsVirtualAsWritten : 1; |
1523 | uint64_t IsPure : 1; |
1524 | uint64_t HasInheritedPrototype : 1; |
1525 | uint64_t HasWrittenPrototype : 1; |
1526 | uint64_t IsDeleted : 1; |
1527 | /// Used by CXXMethodDecl |
1528 | uint64_t IsTrivial : 1; |
1529 | |
1530 | /// This flag indicates whether this function is trivial for the purpose of |
1531 | /// calls. This is meaningful only when this function is a copy/move |
1532 | /// constructor or a destructor. |
1533 | uint64_t IsTrivialForCall : 1; |
1534 | |
1535 | uint64_t IsDefaulted : 1; |
1536 | uint64_t IsExplicitlyDefaulted : 1; |
1537 | uint64_t HasDefaultedFunctionInfo : 1; |
1538 | uint64_t HasImplicitReturnZero : 1; |
1539 | uint64_t IsLateTemplateParsed : 1; |
1540 | |
1541 | /// Kind of contexpr specifier as defined by ConstexprSpecKind. |
1542 | uint64_t ConstexprKind : 2; |
1543 | uint64_t InstantiationIsPending : 1; |
1544 | |
1545 | /// Indicates if the function uses __try. |
1546 | uint64_t UsesSEHTry : 1; |
1547 | |
1548 | /// Indicates if the function was a definition |
1549 | /// but its body was skipped. |
1550 | uint64_t HasSkippedBody : 1; |
1551 | |
1552 | /// Indicates if the function declaration will |
1553 | /// have a body, once we're done parsing it. |
1554 | uint64_t WillHaveBody : 1; |
1555 | |
1556 | /// Indicates that this function is a multiversioned |
1557 | /// function using attribute 'target'. |
1558 | uint64_t IsMultiVersion : 1; |
1559 | |
1560 | /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that |
1561 | /// the Deduction Guide is the implicitly generated 'copy |
1562 | /// deduction candidate' (is used during overload resolution). |
1563 | uint64_t IsCopyDeductionCandidate : 1; |
1564 | |
1565 | /// Store the ODRHash after first calculation. |
1566 | uint64_t HasODRHash : 1; |
1567 | |
1568 | /// Indicates if the function uses Floating Point Constrained Intrinsics |
1569 | uint64_t UsesFPIntrin : 1; |
1570 | }; |
1571 | |
1572 | /// Number of non-inherited bits in FunctionDeclBitfields. |
1573 | enum { NumFunctionDeclBits = 27 }; |
1574 | |
1575 | /// Stores the bits used by CXXConstructorDecl. If modified |
1576 | /// NumCXXConstructorDeclBits and the accessor |
1577 | /// methods in CXXConstructorDecl should be updated appropriately. |
1578 | class CXXConstructorDeclBitfields { |
1579 | friend class CXXConstructorDecl; |
1580 | /// For the bits in DeclContextBitfields. |
1581 | uint64_t : NumDeclContextBits; |
1582 | /// For the bits in FunctionDeclBitfields. |
1583 | uint64_t : NumFunctionDeclBits; |
1584 | |
1585 | /// 24 bits to fit in the remaining available space. |
1586 | /// Note that this makes CXXConstructorDeclBitfields take |
1587 | /// exactly 64 bits and thus the width of NumCtorInitializers |
1588 | /// will need to be shrunk if some bit is added to NumDeclContextBitfields, |
1589 | /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields. |
1590 | uint64_t NumCtorInitializers : 21; |
1591 | uint64_t IsInheritingConstructor : 1; |
1592 | |
1593 | /// Whether this constructor has a trail-allocated explicit specifier. |
1594 | uint64_t HasTrailingExplicitSpecifier : 1; |
1595 | /// If this constructor does't have a trail-allocated explicit specifier. |
1596 | /// Whether this constructor is explicit specified. |
1597 | uint64_t IsSimpleExplicit : 1; |
1598 | }; |
1599 | |
1600 | /// Number of non-inherited bits in CXXConstructorDeclBitfields. |
1601 | enum { |
1602 | NumCXXConstructorDeclBits = 64 - NumDeclContextBits - NumFunctionDeclBits |
1603 | }; |
1604 | |
1605 | /// Stores the bits used by ObjCMethodDecl. |
1606 | /// If modified NumObjCMethodDeclBits and the accessor |
1607 | /// methods in ObjCMethodDecl should be updated appropriately. |
1608 | class ObjCMethodDeclBitfields { |
1609 | friend class ObjCMethodDecl; |
1610 | |
1611 | /// For the bits in DeclContextBitfields. |
1612 | uint64_t : NumDeclContextBits; |
1613 | |
1614 | /// The conventional meaning of this method; an ObjCMethodFamily. |
1615 | /// This is not serialized; instead, it is computed on demand and |
1616 | /// cached. |
1617 | mutable uint64_t Family : ObjCMethodFamilyBitWidth; |
1618 | |
1619 | /// instance (true) or class (false) method. |
1620 | uint64_t IsInstance : 1; |
1621 | uint64_t IsVariadic : 1; |
1622 | |
1623 | /// True if this method is the getter or setter for an explicit property. |
1624 | uint64_t IsPropertyAccessor : 1; |
1625 | |
1626 | /// True if this method is a synthesized property accessor stub. |
1627 | uint64_t IsSynthesizedAccessorStub : 1; |
1628 | |
1629 | /// Method has a definition. |
1630 | uint64_t IsDefined : 1; |
1631 | |
1632 | /// Method redeclaration in the same interface. |
1633 | uint64_t IsRedeclaration : 1; |
1634 | |
1635 | /// Is redeclared in the same interface. |
1636 | mutable uint64_t HasRedeclaration : 1; |
1637 | |
1638 | /// \@required/\@optional |
1639 | uint64_t DeclImplementation : 2; |
1640 | |
1641 | /// in, inout, etc. |
1642 | uint64_t objcDeclQualifier : 7; |
1643 | |
1644 | /// Indicates whether this method has a related result type. |
1645 | uint64_t RelatedResultType : 1; |
1646 | |
1647 | /// Whether the locations of the selector identifiers are in a |
1648 | /// "standard" position, a enum SelectorLocationsKind. |
1649 | uint64_t SelLocsKind : 2; |
1650 | |
1651 | /// Whether this method overrides any other in the class hierarchy. |
1652 | /// |
1653 | /// A method is said to override any method in the class's |
1654 | /// base classes, its protocols, or its categories' protocols, that has |
1655 | /// the same selector and is of the same kind (class or instance). |
1656 | /// A method in an implementation is not considered as overriding the same |
1657 | /// method in the interface or its categories. |
1658 | uint64_t IsOverriding : 1; |
1659 | |
1660 | /// Indicates if the method was a definition but its body was skipped. |
1661 | uint64_t HasSkippedBody : 1; |
1662 | }; |
1663 | |
1664 | /// Number of non-inherited bits in ObjCMethodDeclBitfields. |
1665 | enum { NumObjCMethodDeclBits = 24 }; |
1666 | |
1667 | /// Stores the bits used by ObjCContainerDecl. |
1668 | /// If modified NumObjCContainerDeclBits and the accessor |
1669 | /// methods in ObjCContainerDecl should be updated appropriately. |
1670 | class ObjCContainerDeclBitfields { |
1671 | friend class ObjCContainerDecl; |
1672 | /// For the bits in DeclContextBitfields |
1673 | uint32_t : NumDeclContextBits; |
1674 | |
1675 | // Not a bitfield but this saves space. |
1676 | // Note that ObjCContainerDeclBitfields is full. |
1677 | SourceLocation AtStart; |
1678 | }; |
1679 | |
1680 | /// Number of non-inherited bits in ObjCContainerDeclBitfields. |
1681 | /// Note that here we rely on the fact that SourceLocation is 32 bits |
1682 | /// wide. We check this with the static_assert in the ctor of DeclContext. |
1683 | enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits }; |
1684 | |
1685 | /// Stores the bits used by LinkageSpecDecl. |
1686 | /// If modified NumLinkageSpecDeclBits and the accessor |
1687 | /// methods in LinkageSpecDecl should be updated appropriately. |
1688 | class LinkageSpecDeclBitfields { |
1689 | friend class LinkageSpecDecl; |
1690 | /// For the bits in DeclContextBitfields. |
1691 | uint64_t : NumDeclContextBits; |
1692 | |
1693 | /// The language for this linkage specification with values |
1694 | /// in the enum LinkageSpecDecl::LanguageIDs. |
1695 | uint64_t Language : 3; |
1696 | |
1697 | /// True if this linkage spec has braces. |
1698 | /// This is needed so that hasBraces() returns the correct result while the |
1699 | /// linkage spec body is being parsed. Once RBraceLoc has been set this is |
1700 | /// not used, so it doesn't need to be serialized. |
1701 | uint64_t HasBraces : 1; |
1702 | }; |
1703 | |
1704 | /// Number of non-inherited bits in LinkageSpecDeclBitfields. |
1705 | enum { NumLinkageSpecDeclBits = 4 }; |
1706 | |
1707 | /// Stores the bits used by BlockDecl. |
1708 | /// If modified NumBlockDeclBits and the accessor |
1709 | /// methods in BlockDecl should be updated appropriately. |
1710 | class BlockDeclBitfields { |
1711 | friend class BlockDecl; |
1712 | /// For the bits in DeclContextBitfields. |
1713 | uint64_t : NumDeclContextBits; |
1714 | |
1715 | uint64_t IsVariadic : 1; |
1716 | uint64_t CapturesCXXThis : 1; |
1717 | uint64_t BlockMissingReturnType : 1; |
1718 | uint64_t IsConversionFromLambda : 1; |
1719 | |
1720 | /// A bit that indicates this block is passed directly to a function as a |
1721 | /// non-escaping parameter. |
1722 | uint64_t DoesNotEscape : 1; |
1723 | |
1724 | /// A bit that indicates whether it's possible to avoid coying this block to |
1725 | /// the heap when it initializes or is assigned to a local variable with |
1726 | /// automatic storage. |
1727 | uint64_t CanAvoidCopyToHeap : 1; |
1728 | }; |
1729 | |
1730 | /// Number of non-inherited bits in BlockDeclBitfields. |
1731 | enum { NumBlockDeclBits = 5 }; |
1732 | |
1733 | /// Pointer to the data structure used to lookup declarations |
1734 | /// within this context (or a DependentStoredDeclsMap if this is a |
1735 | /// dependent context). We maintain the invariant that, if the map |
1736 | /// contains an entry for a DeclarationName (and we haven't lazily |
1737 | /// omitted anything), then it contains all relevant entries for that |
1738 | /// name (modulo the hasExternalDecls() flag). |
1739 | mutable StoredDeclsMap *LookupPtr = nullptr; |
1740 | |
1741 | protected: |
1742 | /// This anonymous union stores the bits belonging to DeclContext and classes |
1743 | /// deriving from it. The goal is to use otherwise wasted |
1744 | /// space in DeclContext to store data belonging to derived classes. |
1745 | /// The space saved is especially significient when pointers are aligned |
1746 | /// to 8 bytes. In this case due to alignment requirements we have a |
1747 | /// little less than 8 bytes free in DeclContext which we can use. |
1748 | /// We check that none of the classes in this union is larger than |
1749 | /// 8 bytes with static_asserts in the ctor of DeclContext. |
1750 | union { |
1751 | DeclContextBitfields DeclContextBits; |
1752 | TagDeclBitfields TagDeclBits; |
1753 | EnumDeclBitfields EnumDeclBits; |
1754 | RecordDeclBitfields RecordDeclBits; |
1755 | OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits; |
1756 | FunctionDeclBitfields FunctionDeclBits; |
1757 | CXXConstructorDeclBitfields CXXConstructorDeclBits; |
1758 | ObjCMethodDeclBitfields ObjCMethodDeclBits; |
1759 | ObjCContainerDeclBitfields ObjCContainerDeclBits; |
1760 | LinkageSpecDeclBitfields LinkageSpecDeclBits; |
1761 | BlockDeclBitfields BlockDeclBits; |
1762 | |
1763 | static_assert(sizeof(DeclContextBitfields) <= 8, |
1764 | "DeclContextBitfields is larger than 8 bytes!"); |
1765 | static_assert(sizeof(TagDeclBitfields) <= 8, |
1766 | "TagDeclBitfields is larger than 8 bytes!"); |
1767 | static_assert(sizeof(EnumDeclBitfields) <= 8, |
1768 | "EnumDeclBitfields is larger than 8 bytes!"); |
1769 | static_assert(sizeof(RecordDeclBitfields) <= 8, |
1770 | "RecordDeclBitfields is larger than 8 bytes!"); |
1771 | static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8, |
1772 | "OMPDeclareReductionDeclBitfields is larger than 8 bytes!"); |
1773 | static_assert(sizeof(FunctionDeclBitfields) <= 8, |
1774 | "FunctionDeclBitfields is larger than 8 bytes!"); |
1775 | static_assert(sizeof(CXXConstructorDeclBitfields) <= 8, |
1776 | "CXXConstructorDeclBitfields is larger than 8 bytes!"); |
1777 | static_assert(sizeof(ObjCMethodDeclBitfields) <= 8, |
1778 | "ObjCMethodDeclBitfields is larger than 8 bytes!"); |
1779 | static_assert(sizeof(ObjCContainerDeclBitfields) <= 8, |
1780 | "ObjCContainerDeclBitfields is larger than 8 bytes!"); |
1781 | static_assert(sizeof(LinkageSpecDeclBitfields) <= 8, |
1782 | "LinkageSpecDeclBitfields is larger than 8 bytes!"); |
1783 | static_assert(sizeof(BlockDeclBitfields) <= 8, |
1784 | "BlockDeclBitfields is larger than 8 bytes!"); |
1785 | }; |
1786 | |
1787 | /// FirstDecl - The first declaration stored within this declaration |
1788 | /// context. |
1789 | mutable Decl *FirstDecl = nullptr; |
1790 | |
1791 | /// LastDecl - The last declaration stored within this declaration |
1792 | /// context. FIXME: We could probably cache this value somewhere |
1793 | /// outside of the DeclContext, to reduce the size of DeclContext by |
1794 | /// another pointer. |
1795 | mutable Decl *LastDecl = nullptr; |
1796 | |
1797 | /// Build up a chain of declarations. |
1798 | /// |
1799 | /// \returns the first/last pair of declarations. |
1800 | static std::pair<Decl *, Decl *> |
1801 | BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded); |
1802 | |
1803 | DeclContext(Decl::Kind K); |
1804 | |
1805 | public: |
1806 | ~DeclContext(); |
1807 | |
1808 | Decl::Kind getDeclKind() const { |
1809 | return static_cast<Decl::Kind>(DeclContextBits.DeclKind); |
1810 | } |
1811 | |
1812 | const char *getDeclKindName() const; |
1813 | |
1814 | /// getParent - Returns the containing DeclContext. |
1815 | DeclContext *getParent() { |
1816 | return cast<Decl>(this)->getDeclContext(); |
1817 | } |
1818 | const DeclContext *getParent() const { |
1819 | return const_cast<DeclContext*>(this)->getParent(); |
1820 | } |
1821 | |
1822 | /// getLexicalParent - Returns the containing lexical DeclContext. May be |
1823 | /// different from getParent, e.g.: |
1824 | /// |
1825 | /// namespace A { |
1826 | /// struct S; |
1827 | /// } |
1828 | /// struct A::S {}; // getParent() == namespace 'A' |
1829 | /// // getLexicalParent() == translation unit |
1830 | /// |
1831 | DeclContext *getLexicalParent() { |
1832 | return cast<Decl>(this)->getLexicalDeclContext(); |
1833 | } |
1834 | const DeclContext *getLexicalParent() const { |
1835 | return const_cast<DeclContext*>(this)->getLexicalParent(); |
1836 | } |
1837 | |
1838 | DeclContext *getLookupParent(); |
1839 | |
1840 | const DeclContext *getLookupParent() const { |
1841 | return const_cast<DeclContext*>(this)->getLookupParent(); |
1842 | } |
1843 | |
1844 | ASTContext &getParentASTContext() const { |
1845 | return cast<Decl>(this)->getASTContext(); |
1846 | } |
1847 | |
1848 | bool isClosure() const { return getDeclKind() == Decl::Block; } |
1849 | |
1850 | /// Return this DeclContext if it is a BlockDecl. Otherwise, return the |
1851 | /// innermost enclosing BlockDecl or null if there are no enclosing blocks. |
1852 | const BlockDecl *getInnermostBlockDecl() const; |
1853 | |
1854 | bool isObjCContainer() const { |
1855 | switch (getDeclKind()) { |
1856 | case Decl::ObjCCategory: |
1857 | case Decl::ObjCCategoryImpl: |
1858 | case Decl::ObjCImplementation: |
1859 | case Decl::ObjCInterface: |
1860 | case Decl::ObjCProtocol: |
1861 | return true; |
1862 | default: |
1863 | return false; |
1864 | } |
1865 | } |
1866 | |
1867 | bool isFunctionOrMethod() const { |
1868 | switch (getDeclKind()) { |
1869 | case Decl::Block: |
1870 | case Decl::Captured: |
1871 | case Decl::ObjCMethod: |
1872 | return true; |
1873 | default: |
1874 | return getDeclKind() >= Decl::firstFunction && |
1875 | getDeclKind() <= Decl::lastFunction; |
1876 | } |
1877 | } |
1878 | |
1879 | /// Test whether the context supports looking up names. |
1880 | bool isLookupContext() const { |
1881 | return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec && |
1882 | getDeclKind() != Decl::Export; |
1883 | } |
1884 | |
1885 | bool isFileContext() const { |
1886 | return getDeclKind() == Decl::TranslationUnit || |
1887 | getDeclKind() == Decl::Namespace; |
1888 | } |
1889 | |
1890 | bool isTranslationUnit() const { |
1891 | return getDeclKind() == Decl::TranslationUnit; |
1892 | } |
1893 | |
1894 | bool isRecord() const { |
1895 | return getDeclKind() >= Decl::firstRecord && |
1896 | getDeclKind() <= Decl::lastRecord; |
1897 | } |
1898 | |
1899 | bool isNamespace() const { return getDeclKind() == Decl::Namespace; } |
1900 | |
1901 | bool isStdNamespace() const; |
1902 | |
1903 | bool isInlineNamespace() const; |
1904 | |
1905 | /// Determines whether this context is dependent on a |
1906 | /// template parameter. |
1907 | bool isDependentContext() const; |
1908 | |
1909 | /// isTransparentContext - Determines whether this context is a |
1910 | /// "transparent" context, meaning that the members declared in this |
1911 | /// context are semantically declared in the nearest enclosing |
1912 | /// non-transparent (opaque) context but are lexically declared in |
1913 | /// this context. For example, consider the enumerators of an |
1914 | /// enumeration type: |
1915 | /// @code |
1916 | /// enum E { |
1917 | /// Val1 |
1918 | /// }; |
1919 | /// @endcode |
1920 | /// Here, E is a transparent context, so its enumerator (Val1) will |
1921 | /// appear (semantically) that it is in the same context of E. |
1922 | /// Examples of transparent contexts include: enumerations (except for |
1923 | /// C++0x scoped enums), and C++ linkage specifications. |
1924 | bool isTransparentContext() const; |
1925 | |
1926 | /// Determines whether this context or some of its ancestors is a |
1927 | /// linkage specification context that specifies C linkage. |
1928 | bool isExternCContext() const; |
1929 | |
1930 | /// Retrieve the nearest enclosing C linkage specification context. |
1931 | const LinkageSpecDecl *getExternCContext() const; |
1932 | |
1933 | /// Determines whether this context or some of its ancestors is a |
1934 | /// linkage specification context that specifies C++ linkage. |
1935 | bool isExternCXXContext() const; |
1936 | |
1937 | /// Determine whether this declaration context is equivalent |
1938 | /// to the declaration context DC. |
1939 | bool Equals(const DeclContext *DC) const { |
1940 | return DC && this->getPrimaryContext() == DC->getPrimaryContext(); |
1941 | } |
1942 | |
1943 | /// Determine whether this declaration context encloses the |
1944 | /// declaration context DC. |
1945 | bool Encloses(const DeclContext *DC) const; |
1946 | |
1947 | /// Find the nearest non-closure ancestor of this context, |
1948 | /// i.e. the innermost semantic parent of this context which is not |
1949 | /// a closure. A context may be its own non-closure ancestor. |
1950 | Decl *getNonClosureAncestor(); |
1951 | const Decl *getNonClosureAncestor() const { |
1952 | return const_cast<DeclContext*>(this)->getNonClosureAncestor(); |
1953 | } |
1954 | |
1955 | /// getPrimaryContext - There may be many different |
1956 | /// declarations of the same entity (including forward declarations |
1957 | /// of classes, multiple definitions of namespaces, etc.), each with |
1958 | /// a different set of declarations. This routine returns the |
1959 | /// "primary" DeclContext structure, which will contain the |
1960 | /// information needed to perform name lookup into this context. |
1961 | DeclContext *getPrimaryContext(); |
1962 | const DeclContext *getPrimaryContext() const { |
1963 | return const_cast<DeclContext*>(this)->getPrimaryContext(); |
1964 | } |
1965 | |
1966 | /// getRedeclContext - Retrieve the context in which an entity conflicts with |
1967 | /// other entities of the same name, or where it is a redeclaration if the |
1968 | /// two entities are compatible. This skips through transparent contexts. |
1969 | DeclContext *getRedeclContext(); |
1970 | const DeclContext *getRedeclContext() const { |
1971 | return const_cast<DeclContext *>(this)->getRedeclContext(); |
1972 | } |
1973 | |
1974 | /// Retrieve the nearest enclosing namespace context. |
1975 | DeclContext *getEnclosingNamespaceContext(); |
1976 | const DeclContext *getEnclosingNamespaceContext() const { |
1977 | return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext(); |
1978 | } |
1979 | |
1980 | /// Retrieve the outermost lexically enclosing record context. |
1981 | RecordDecl *getOuterLexicalRecordContext(); |
1982 | const RecordDecl *getOuterLexicalRecordContext() const { |
1983 | return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext(); |
1984 | } |
1985 | |
1986 | /// Test if this context is part of the enclosing namespace set of |
1987 | /// the context NS, as defined in C++0x [namespace.def]p9. If either context |
1988 | /// isn't a namespace, this is equivalent to Equals(). |
1989 | /// |
1990 | /// The enclosing namespace set of a namespace is the namespace and, if it is |
1991 | /// inline, its enclosing namespace, recursively. |
1992 | bool InEnclosingNamespaceSetOf(const DeclContext *NS) const; |
1993 | |
1994 | /// Collects all of the declaration contexts that are semantically |
1995 | /// connected to this declaration context. |
1996 | /// |
1997 | /// For declaration contexts that have multiple semantically connected but |
1998 | /// syntactically distinct contexts, such as C++ namespaces, this routine |
1999 | /// retrieves the complete set of such declaration contexts in source order. |
2000 | /// For example, given: |
2001 | /// |
2002 | /// \code |
2003 | /// namespace N { |
2004 | /// int x; |
2005 | /// } |
2006 | /// namespace N { |
2007 | /// int y; |
2008 | /// } |
2009 | /// \endcode |
2010 | /// |
2011 | /// The \c Contexts parameter will contain both definitions of N. |
2012 | /// |
2013 | /// \param Contexts Will be cleared and set to the set of declaration |
2014 | /// contexts that are semanticaly connected to this declaration context, |
2015 | /// in source order, including this context (which may be the only result, |
2016 | /// for non-namespace contexts). |
2017 | void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts); |
2018 | |
2019 | /// decl_iterator - Iterates through the declarations stored |
2020 | /// within this context. |
2021 | class decl_iterator { |
2022 | /// Current - The current declaration. |
2023 | Decl *Current = nullptr; |
2024 | |
2025 | public: |
2026 | using value_type = Decl *; |
2027 | using reference = const value_type &; |
2028 | using pointer = const value_type *; |
2029 | using iterator_category = std::forward_iterator_tag; |
2030 | using difference_type = std::ptrdiff_t; |
2031 | |
2032 | decl_iterator() = default; |
2033 | explicit decl_iterator(Decl *C) : Current(C) {} |
2034 | |
2035 | reference operator*() const { return Current; } |
2036 | |
2037 | // This doesn't meet the iterator requirements, but it's convenient |
2038 | value_type operator->() const { return Current; } |
2039 | |
2040 | decl_iterator& operator++() { |
2041 | Current = Current->getNextDeclInContext(); |
2042 | return *this; |
2043 | } |
2044 | |
2045 | decl_iterator operator++(int) { |
2046 | decl_iterator tmp(*this); |
2047 | ++(*this); |
2048 | return tmp; |
2049 | } |
2050 | |
2051 | friend bool operator==(decl_iterator x, decl_iterator y) { |
2052 | return x.Current == y.Current; |
2053 | } |
2054 | |
2055 | friend bool operator!=(decl_iterator x, decl_iterator y) { |
2056 | return x.Current != y.Current; |
2057 | } |
2058 | }; |
2059 | |
2060 | using decl_range = llvm::iterator_range<decl_iterator>; |
2061 | |
2062 | /// decls_begin/decls_end - Iterate over the declarations stored in |
2063 | /// this context. |
2064 | decl_range decls() const { return decl_range(decls_begin(), decls_end()); } |
2065 | decl_iterator decls_begin() const; |
2066 | decl_iterator decls_end() const { return decl_iterator(); } |
2067 | bool decls_empty() const; |
2068 | |
2069 | /// noload_decls_begin/end - Iterate over the declarations stored in this |
2070 | /// context that are currently loaded; don't attempt to retrieve anything |
2071 | /// from an external source. |
2072 | decl_range noload_decls() const { |
2073 | return decl_range(noload_decls_begin(), noload_decls_end()); |
2074 | } |
2075 | decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); } |
2076 | decl_iterator noload_decls_end() const { return decl_iterator(); } |
2077 | |
2078 | /// specific_decl_iterator - Iterates over a subrange of |
2079 | /// declarations stored in a DeclContext, providing only those that |
2080 | /// are of type SpecificDecl (or a class derived from it). This |
2081 | /// iterator is used, for example, to provide iteration over just |
2082 | /// the fields within a RecordDecl (with SpecificDecl = FieldDecl). |
2083 | template<typename SpecificDecl> |
2084 | class specific_decl_iterator { |
2085 | /// Current - The current, underlying declaration iterator, which |
2086 | /// will either be NULL or will point to a declaration of |
2087 | /// type SpecificDecl. |
2088 | DeclContext::decl_iterator Current; |
2089 | |
2090 | /// SkipToNextDecl - Advances the current position up to the next |
2091 | /// declaration of type SpecificDecl that also meets the criteria |
2092 | /// required by Acceptable. |
2093 | void SkipToNextDecl() { |
2094 | while (*Current && !isa<SpecificDecl>(*Current)) |
2095 | ++Current; |
2096 | } |
2097 | |
2098 | public: |
2099 | using value_type = SpecificDecl *; |
2100 | // TODO: Add reference and pointer types (with some appropriate proxy type) |
2101 | // if we ever have a need for them. |
2102 | using reference = void; |
2103 | using pointer = void; |
2104 | using difference_type = |
2105 | std::iterator_traits<DeclContext::decl_iterator>::difference_type; |
2106 | using iterator_category = std::forward_iterator_tag; |
2107 | |
2108 | specific_decl_iterator() = default; |
2109 | |
2110 | /// specific_decl_iterator - Construct a new iterator over a |
2111 | /// subset of the declarations the range [C, |
2112 | /// end-of-declarations). If A is non-NULL, it is a pointer to a |
2113 | /// member function of SpecificDecl that should return true for |
2114 | /// all of the SpecificDecl instances that will be in the subset |
2115 | /// of iterators. For example, if you want Objective-C instance |
2116 | /// methods, SpecificDecl will be ObjCMethodDecl and A will be |
2117 | /// &ObjCMethodDecl::isInstanceMethod. |
2118 | explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) { |
2119 | SkipToNextDecl(); |
2120 | } |
2121 | |
2122 | value_type operator*() const { return cast<SpecificDecl>(*Current); } |
2123 | |
2124 | // This doesn't meet the iterator requirements, but it's convenient |
2125 | value_type operator->() const { return **this; } |
2126 | |
2127 | specific_decl_iterator& operator++() { |
2128 | ++Current; |
2129 | SkipToNextDecl(); |
2130 | return *this; |
2131 | } |
2132 | |
2133 | specific_decl_iterator operator++(int) { |
2134 | specific_decl_iterator tmp(*this); |
2135 | ++(*this); |
2136 | return tmp; |
2137 | } |
2138 | |
2139 | friend bool operator==(const specific_decl_iterator& x, |
2140 | const specific_decl_iterator& y) { |
2141 | return x.Current == y.Current; |
2142 | } |
2143 | |
2144 | friend bool operator!=(const specific_decl_iterator& x, |
2145 | const specific_decl_iterator& y) { |
2146 | return x.Current != y.Current; |
2147 | } |
2148 | }; |
2149 | |
2150 | /// Iterates over a filtered subrange of declarations stored |
2151 | /// in a DeclContext. |
2152 | /// |
2153 | /// This iterator visits only those declarations that are of type |
2154 | /// SpecificDecl (or a class derived from it) and that meet some |
2155 | /// additional run-time criteria. This iterator is used, for |
2156 | /// example, to provide access to the instance methods within an |
2157 | /// Objective-C interface (with SpecificDecl = ObjCMethodDecl and |
2158 | /// Acceptable = ObjCMethodDecl::isInstanceMethod). |
2159 | template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const> |
2160 | class filtered_decl_iterator { |
2161 | /// Current - The current, underlying declaration iterator, which |
2162 | /// will either be NULL or will point to a declaration of |
2163 | /// type SpecificDecl. |
2164 | DeclContext::decl_iterator Current; |
2165 | |
2166 | /// SkipToNextDecl - Advances the current position up to the next |
2167 | /// declaration of type SpecificDecl that also meets the criteria |
2168 | /// required by Acceptable. |
2169 | void SkipToNextDecl() { |
2170 | while (*Current && |
2171 | (!isa<SpecificDecl>(*Current) || |
2172 | (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)()))) |
2173 | ++Current; |
2174 | } |
2175 | |
2176 | public: |
2177 | using value_type = SpecificDecl *; |
2178 | // TODO: Add reference and pointer types (with some appropriate proxy type) |
2179 | // if we ever have a need for them. |
2180 | using reference = void; |
2181 | using pointer = void; |
2182 | using difference_type = |
2183 | std::iterator_traits<DeclContext::decl_iterator>::difference_type; |
2184 | using iterator_category = std::forward_iterator_tag; |
2185 | |
2186 | filtered_decl_iterator() = default; |
2187 | |
2188 | /// filtered_decl_iterator - Construct a new iterator over a |
2189 | /// subset of the declarations the range [C, |
2190 | /// end-of-declarations). If A is non-NULL, it is a pointer to a |
2191 | /// member function of SpecificDecl that should return true for |
2192 | /// all of the SpecificDecl instances that will be in the subset |
2193 | /// of iterators. For example, if you want Objective-C instance |
2194 | /// methods, SpecificDecl will be ObjCMethodDecl and A will be |
2195 | /// &ObjCMethodDecl::isInstanceMethod. |
2196 | explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) { |
2197 | SkipToNextDecl(); |
2198 | } |
2199 | |
2200 | value_type operator*() const { return cast<SpecificDecl>(*Current); } |
2201 | value_type operator->() const { return cast<SpecificDecl>(*Current); } |
2202 | |
2203 | filtered_decl_iterator& operator++() { |
2204 | ++Current; |
2205 | SkipToNextDecl(); |
2206 | return *this; |
2207 | } |
2208 | |
2209 | filtered_decl_iterator operator++(int) { |
2210 | filtered_decl_iterator tmp(*this); |
2211 | ++(*this); |
2212 | return tmp; |
2213 | } |
2214 | |
2215 | friend bool operator==(const filtered_decl_iterator& x, |
2216 | const filtered_decl_iterator& y) { |
2217 | return x.Current == y.Current; |
2218 | } |
2219 | |
2220 | friend bool operator!=(const filtered_decl_iterator& x, |
2221 | const filtered_decl_iterator& y) { |
2222 | return x.Current != y.Current; |
2223 | } |
2224 | }; |
2225 | |
2226 | /// Add the declaration D into this context. |
2227 | /// |
2228 | /// This routine should be invoked when the declaration D has first |
2229 | /// been declared, to place D into the context where it was |
2230 | /// (lexically) defined. Every declaration must be added to one |
2231 | /// (and only one!) context, where it can be visited via |
2232 | /// [decls_begin(), decls_end()). Once a declaration has been added |
2233 | /// to its lexical context, the corresponding DeclContext owns the |
2234 | /// declaration. |
2235 | /// |
2236 | /// If D is also a NamedDecl, it will be made visible within its |
2237 | /// semantic context via makeDeclVisibleInContext. |
2238 | void addDecl(Decl *D); |
2239 | |
2240 | /// Add the declaration D into this context, but suppress |
2241 | /// searches for external declarations with the same name. |
2242 | /// |
2243 | /// Although analogous in function to addDecl, this removes an |
2244 | /// important check. This is only useful if the Decl is being |
2245 | /// added in response to an external search; in all other cases, |
2246 | /// addDecl() is the right function to use. |
2247 | /// See the ASTImporter for use cases. |
2248 | void addDeclInternal(Decl *D); |
2249 | |
2250 | /// Add the declaration D to this context without modifying |
2251 | /// any lookup tables. |
2252 | /// |
2253 | /// This is useful for some operations in dependent contexts where |
2254 | /// the semantic context might not be dependent; this basically |
2255 | /// only happens with friends. |
2256 | void addHiddenDecl(Decl *D); |
2257 | |
2258 | /// Removes a declaration from this context. |
2259 | void removeDecl(Decl *D); |
2260 | |
2261 | /// Checks whether a declaration is in this context. |
2262 | bool containsDecl(Decl *D) const; |
2263 | |
2264 | /// Checks whether a declaration is in this context. |
2265 | /// This also loads the Decls from the external source before the check. |
2266 | bool containsDeclAndLoad(Decl *D) const; |
2267 | |
2268 | using lookup_result = DeclContextLookupResult; |
2269 | using lookup_iterator = lookup_result::iterator; |
2270 | |
2271 | /// lookup - Find the declarations (if any) with the given Name in |
2272 | /// this context. Returns a range of iterators that contains all of |
2273 | /// the declarations with this name, with object, function, member, |
2274 | /// and enumerator names preceding any tag name. Note that this |
2275 | /// routine will not look into parent contexts. |
2276 | lookup_result lookup(DeclarationName Name) const; |
2277 | |
2278 | /// Find the declarations with the given name that are visible |
2279 | /// within this context; don't attempt to retrieve anything from an |
2280 | /// external source. |
2281 | lookup_result noload_lookup(DeclarationName Name); |
2282 | |
2283 | /// A simplistic name lookup mechanism that performs name lookup |
2284 | /// into this declaration context without consulting the external source. |
2285 | /// |
2286 | /// This function should almost never be used, because it subverts the |
2287 | /// usual relationship between a DeclContext and the external source. |
2288 | /// See the ASTImporter for the (few, but important) use cases. |
2289 | /// |
2290 | /// FIXME: This is very inefficient; replace uses of it with uses of |
2291 | /// noload_lookup. |
2292 | void localUncachedLookup(DeclarationName Name, |
2293 | SmallVectorImpl<NamedDecl *> &Results); |
2294 | |
2295 | /// Makes a declaration visible within this context. |
2296 | /// |
2297 | /// This routine makes the declaration D visible to name lookup |
2298 | /// within this context and, if this is a transparent context, |
2299 | /// within its parent contexts up to the first enclosing |
2300 | /// non-transparent context. Making a declaration visible within a |
2301 | /// context does not transfer ownership of a declaration, and a |
2302 | /// declaration can be visible in many contexts that aren't its |
2303 | /// lexical context. |
2304 | /// |
2305 | /// If D is a redeclaration of an existing declaration that is |
2306 | /// visible from this context, as determined by |
2307 | /// NamedDecl::declarationReplaces, the previous declaration will be |
2308 | /// replaced with D. |
2309 | void makeDeclVisibleInContext(NamedDecl *D); |
2310 | |
2311 | /// all_lookups_iterator - An iterator that provides a view over the results |
2312 | /// of looking up every possible name. |
2313 | class all_lookups_iterator; |
2314 | |
2315 | using lookups_range = llvm::iterator_range<all_lookups_iterator>; |
2316 | |
2317 | lookups_range lookups() const; |
2318 | // Like lookups(), but avoids loading external declarations. |
2319 | // If PreserveInternalState, avoids building lookup data structures too. |
2320 | lookups_range noload_lookups(bool PreserveInternalState) const; |
2321 | |
2322 | /// Iterators over all possible lookups within this context. |
2323 | all_lookups_iterator lookups_begin() const; |
2324 | all_lookups_iterator lookups_end() const; |
2325 | |
2326 | /// Iterators over all possible lookups within this context that are |
2327 | /// currently loaded; don't attempt to retrieve anything from an external |
2328 | /// source. |
2329 | all_lookups_iterator noload_lookups_begin() const; |
2330 | all_lookups_iterator noload_lookups_end() const; |
2331 | |
2332 | struct udir_iterator; |
2333 | |
2334 | using udir_iterator_base = |
2335 | llvm::iterator_adaptor_base<udir_iterator, lookup_iterator, |
2336 | std::random_access_iterator_tag, |
2337 | UsingDirectiveDecl *>; |
2338 | |
2339 | struct udir_iterator : udir_iterator_base { |
2340 | udir_iterator(lookup_iterator I) : udir_iterator_base(I) {} |
2341 | |
2342 | UsingDirectiveDecl *operator*() const; |
2343 | }; |
2344 | |
2345 | using udir_range = llvm::iterator_range<udir_iterator>; |
2346 | |
2347 | udir_range using_directives() const; |
2348 | |
2349 | // These are all defined in DependentDiagnostic.h. |
2350 | class ddiag_iterator; |
2351 | |
2352 | using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>; |
2353 | |
2354 | inline ddiag_range ddiags() const; |
2355 | |
2356 | // Low-level accessors |
2357 | |
2358 | /// Mark that there are external lexical declarations that we need |
2359 | /// to include in our lookup table (and that are not available as external |
2360 | /// visible lookups). These extra lookup results will be found by walking |
2361 | /// the lexical declarations of this context. This should be used only if |
2362 | /// setHasExternalLexicalStorage() has been called on any decl context for |
2363 | /// which this is the primary context. |
2364 | void setMustBuildLookupTable() { |
2365 | assert(this == getPrimaryContext() &&((this == getPrimaryContext() && "should only be called on primary context" ) ? static_cast<void> (0) : __assert_fail ("this == getPrimaryContext() && \"should only be called on primary context\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 2366, __PRETTY_FUNCTION__)) |
2366 | "should only be called on primary context")((this == getPrimaryContext() && "should only be called on primary context" ) ? static_cast<void> (0) : __assert_fail ("this == getPrimaryContext() && \"should only be called on primary context\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/DeclBase.h" , 2366, __PRETTY_FUNCTION__)); |
2367 | DeclContextBits.HasLazyExternalLexicalLookups = true; |
2368 | } |
2369 | |
2370 | /// Retrieve the internal representation of the lookup structure. |
2371 | /// This may omit some names if we are lazily building the structure. |
2372 | StoredDeclsMap *getLookupPtr() const { return LookupPtr; } |
2373 | |
2374 | /// Ensure the lookup structure is fully-built and return it. |
2375 | StoredDeclsMap *buildLookup(); |
2376 | |
2377 | /// Whether this DeclContext has external storage containing |
2378 | /// additional declarations that are lexically in this context. |
2379 | bool hasExternalLexicalStorage() const { |
2380 | return DeclContextBits.ExternalLexicalStorage; |
2381 | } |
2382 | |
2383 | /// State whether this DeclContext has external storage for |
2384 | /// declarations lexically in this context. |
2385 | void setHasExternalLexicalStorage(bool ES = true) const { |
2386 | DeclContextBits.ExternalLexicalStorage = ES; |
2387 | } |
2388 | |
2389 | /// Whether this DeclContext has external storage containing |
2390 | /// additional declarations that are visible in this context. |
2391 | bool hasExternalVisibleStorage() const { |
2392 | return DeclContextBits.ExternalVisibleStorage; |
2393 | } |
2394 | |
2395 | /// State whether this DeclContext has external storage for |
2396 | /// declarations visible in this context. |
2397 | void setHasExternalVisibleStorage(bool ES = true) const { |
2398 | DeclContextBits.ExternalVisibleStorage = ES; |
2399 | if (ES && LookupPtr) |
2400 | DeclContextBits.NeedToReconcileExternalVisibleStorage = true; |
2401 | } |
2402 | |
2403 | /// Determine whether the given declaration is stored in the list of |
2404 | /// declarations lexically within this context. |
2405 | bool isDeclInLexicalTraversal(const Decl *D) const { |
2406 | return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl || |
2407 | D == LastDecl); |
2408 | } |
2409 | |
2410 | bool setUseQualifiedLookup(bool use = true) const { |
2411 | bool old_value = DeclContextBits.UseQualifiedLookup; |
2412 | DeclContextBits.UseQualifiedLookup = use; |
2413 | return old_value; |
2414 | } |
2415 | |
2416 | bool shouldUseQualifiedLookup() const { |
2417 | return DeclContextBits.UseQualifiedLookup; |
2418 | } |
2419 | |
2420 | static bool classof(const Decl *D); |
2421 | static bool classof(const DeclContext *D) { return true; } |
2422 | |
2423 | void dumpDeclContext() const; |
2424 | void dumpLookups() const; |
2425 | void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false, |
2426 | bool Deserialize = false) const; |
2427 | |
2428 | private: |
2429 | /// Whether this declaration context has had externally visible |
2430 | /// storage added since the last lookup. In this case, \c LookupPtr's |
2431 | /// invariant may not hold and needs to be fixed before we perform |
2432 | /// another lookup. |
2433 | bool hasNeedToReconcileExternalVisibleStorage() const { |
2434 | return DeclContextBits.NeedToReconcileExternalVisibleStorage; |
2435 | } |
2436 | |
2437 | /// State that this declaration context has had externally visible |
2438 | /// storage added since the last lookup. In this case, \c LookupPtr's |
2439 | /// invariant may not hold and needs to be fixed before we perform |
2440 | /// another lookup. |
2441 | void setNeedToReconcileExternalVisibleStorage(bool Need = true) const { |
2442 | DeclContextBits.NeedToReconcileExternalVisibleStorage = Need; |
2443 | } |
2444 | |
2445 | /// If \c true, this context may have local lexical declarations |
2446 | /// that are missing from the lookup table. |
2447 | bool hasLazyLocalLexicalLookups() const { |
2448 | return DeclContextBits.HasLazyLocalLexicalLookups; |
2449 | } |
2450 | |
2451 | /// If \c true, this context may have local lexical declarations |
2452 | /// that are missing from the lookup table. |
2453 | void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const { |
2454 | DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL; |
2455 | } |
2456 | |
2457 | /// If \c true, the external source may have lexical declarations |
2458 | /// that are missing from the lookup table. |
2459 | bool hasLazyExternalLexicalLookups() const { |
2460 | return DeclContextBits.HasLazyExternalLexicalLookups; |
2461 | } |
2462 | |
2463 | /// If \c true, the external source may have lexical declarations |
2464 | /// that are missing from the lookup table. |
2465 | void setHasLazyExternalLexicalLookups(bool HasLELL = true) const { |
2466 | DeclContextBits.HasLazyExternalLexicalLookups = HasLELL; |
2467 | } |
2468 | |
2469 | void reconcileExternalVisibleStorage() const; |
2470 | bool LoadLexicalDeclsFromExternalStorage() const; |
2471 | |
2472 | /// Makes a declaration visible within this context, but |
2473 | /// suppresses searches for external declarations with the same |
2474 | /// name. |
2475 | /// |
2476 | /// Analogous to makeDeclVisibleInContext, but for the exclusive |
2477 | /// use of addDeclInternal(). |
2478 | void makeDeclVisibleInContextInternal(NamedDecl *D); |
2479 | |
2480 | StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const; |
2481 | |
2482 | void loadLazyLocalLexicalLookups(); |
2483 | void buildLookupImpl(DeclContext *DCtx, bool Internal); |
2484 | void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal, |
2485 | bool Rediscoverable); |
2486 | void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal); |
2487 | }; |
2488 | |
2489 | inline bool Decl::isTemplateParameter() const { |
2490 | return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm || |
2491 | getKind() == TemplateTemplateParm; |
2492 | } |
2493 | |
2494 | // Specialization selected when ToTy is not a known subclass of DeclContext. |
2495 | template <class ToTy, |
2496 | bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value> |
2497 | struct cast_convert_decl_context { |
2498 | static const ToTy *doit(const DeclContext *Val) { |
2499 | return static_cast<const ToTy*>(Decl::castFromDeclContext(Val)); |
2500 | } |
2501 | |
2502 | static ToTy *doit(DeclContext *Val) { |
2503 | return static_cast<ToTy*>(Decl::castFromDeclContext(Val)); |
2504 | } |
2505 | }; |
2506 | |
2507 | // Specialization selected when ToTy is a known subclass of DeclContext. |
2508 | template <class ToTy> |
2509 | struct cast_convert_decl_context<ToTy, true> { |
2510 | static const ToTy *doit(const DeclContext *Val) { |
2511 | return static_cast<const ToTy*>(Val); |
2512 | } |
2513 | |
2514 | static ToTy *doit(DeclContext *Val) { |
2515 | return static_cast<ToTy*>(Val); |
2516 | } |
2517 | }; |
2518 | |
2519 | } // namespace clang |
2520 | |
2521 | namespace llvm { |
2522 | |
2523 | /// isa<T>(DeclContext*) |
2524 | template <typename To> |
2525 | struct isa_impl<To, ::clang::DeclContext> { |
2526 | static bool doit(const ::clang::DeclContext &Val) { |
2527 | return To::classofKind(Val.getDeclKind()); |
2528 | } |
2529 | }; |
2530 | |
2531 | /// cast<T>(DeclContext*) |
2532 | template<class ToTy> |
2533 | struct cast_convert_val<ToTy, |
2534 | const ::clang::DeclContext,const ::clang::DeclContext> { |
2535 | static const ToTy &doit(const ::clang::DeclContext &Val) { |
2536 | return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); |
2537 | } |
2538 | }; |
2539 | |
2540 | template<class ToTy> |
2541 | struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> { |
2542 | static ToTy &doit(::clang::DeclContext &Val) { |
2543 | return *::clang::cast_convert_decl_context<ToTy>::doit(&Val); |
2544 | } |
2545 | }; |
2546 | |
2547 | template<class ToTy> |
2548 | struct cast_convert_val<ToTy, |
2549 | const ::clang::DeclContext*, const ::clang::DeclContext*> { |
2550 | static const ToTy *doit(const ::clang::DeclContext *Val) { |
2551 | return ::clang::cast_convert_decl_context<ToTy>::doit(Val); |
2552 | } |
2553 | }; |
2554 | |
2555 | template<class ToTy> |
2556 | struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> { |
2557 | static ToTy *doit(::clang::DeclContext *Val) { |
2558 | return ::clang::cast_convert_decl_context<ToTy>::doit(Val); |
2559 | } |
2560 | }; |
2561 | |
2562 | /// Implement cast_convert_val for Decl -> DeclContext conversions. |
2563 | template<class FromTy> |
2564 | struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> { |
2565 | static ::clang::DeclContext &doit(const FromTy &Val) { |
2566 | return *FromTy::castToDeclContext(&Val); |
2567 | } |
2568 | }; |
2569 | |
2570 | template<class FromTy> |
2571 | struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> { |
2572 | static ::clang::DeclContext *doit(const FromTy *Val) { |
2573 | return FromTy::castToDeclContext(Val); |
2574 | } |
2575 | }; |
2576 | |
2577 | template<class FromTy> |
2578 | struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> { |
2579 | static const ::clang::DeclContext &doit(const FromTy &Val) { |
2580 | return *FromTy::castToDeclContext(&Val); |
2581 | } |
2582 | }; |
2583 | |
2584 | template<class FromTy> |
2585 | struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> { |
2586 | static const ::clang::DeclContext *doit(const FromTy *Val) { |
2587 | return FromTy::castToDeclContext(Val); |
2588 | } |
2589 | }; |
2590 | |
2591 | } // namespace llvm |
2592 | |
2593 | #endif // LLVM_CLANG_AST_DECLBASE_H |
1 | //===- Decl.h - Classes for representing declarations -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the Decl subclasses. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_DECL_H |
14 | #define LLVM_CLANG_AST_DECL_H |
15 | |
16 | #include "clang/AST/APValue.h" |
17 | #include "clang/AST/ASTContextAllocate.h" |
18 | #include "clang/AST/DeclAccessPair.h" |
19 | #include "clang/AST/DeclBase.h" |
20 | #include "clang/AST/DeclarationName.h" |
21 | #include "clang/AST/ExternalASTSource.h" |
22 | #include "clang/AST/NestedNameSpecifier.h" |
23 | #include "clang/AST/Redeclarable.h" |
24 | #include "clang/AST/Type.h" |
25 | #include "clang/Basic/AddressSpaces.h" |
26 | #include "clang/Basic/Diagnostic.h" |
27 | #include "clang/Basic/IdentifierTable.h" |
28 | #include "clang/Basic/LLVM.h" |
29 | #include "clang/Basic/Linkage.h" |
30 | #include "clang/Basic/OperatorKinds.h" |
31 | #include "clang/Basic/PartialDiagnostic.h" |
32 | #include "clang/Basic/PragmaKinds.h" |
33 | #include "clang/Basic/SourceLocation.h" |
34 | #include "clang/Basic/Specifiers.h" |
35 | #include "clang/Basic/Visibility.h" |
36 | #include "llvm/ADT/APSInt.h" |
37 | #include "llvm/ADT/ArrayRef.h" |
38 | #include "llvm/ADT/Optional.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/StringRef.h" |
42 | #include "llvm/ADT/iterator_range.h" |
43 | #include "llvm/Support/Casting.h" |
44 | #include "llvm/Support/Compiler.h" |
45 | #include "llvm/Support/TrailingObjects.h" |
46 | #include <cassert> |
47 | #include <cstddef> |
48 | #include <cstdint> |
49 | #include <string> |
50 | #include <utility> |
51 | |
52 | namespace clang { |
53 | |
54 | class ASTContext; |
55 | struct ASTTemplateArgumentListInfo; |
56 | class Attr; |
57 | class CompoundStmt; |
58 | class DependentFunctionTemplateSpecializationInfo; |
59 | class EnumDecl; |
60 | class Expr; |
61 | class FunctionTemplateDecl; |
62 | class FunctionTemplateSpecializationInfo; |
63 | class FunctionTypeLoc; |
64 | class LabelStmt; |
65 | class MemberSpecializationInfo; |
66 | class Module; |
67 | class NamespaceDecl; |
68 | class ParmVarDecl; |
69 | class RecordDecl; |
70 | class Stmt; |
71 | class StringLiteral; |
72 | class TagDecl; |
73 | class TemplateArgumentList; |
74 | class TemplateArgumentListInfo; |
75 | class TemplateParameterList; |
76 | class TypeAliasTemplateDecl; |
77 | class TypeLoc; |
78 | class UnresolvedSetImpl; |
79 | class VarTemplateDecl; |
80 | |
81 | /// The top declaration context. |
82 | class TranslationUnitDecl : public Decl, public DeclContext { |
83 | ASTContext &Ctx; |
84 | |
85 | /// The (most recently entered) anonymous namespace for this |
86 | /// translation unit, if one has been created. |
87 | NamespaceDecl *AnonymousNamespace = nullptr; |
88 | |
89 | explicit TranslationUnitDecl(ASTContext &ctx); |
90 | |
91 | virtual void anchor(); |
92 | |
93 | public: |
94 | ASTContext &getASTContext() const { return Ctx; } |
95 | |
96 | NamespaceDecl *getAnonymousNamespace() const { return AnonymousNamespace; } |
97 | void setAnonymousNamespace(NamespaceDecl *D) { AnonymousNamespace = D; } |
98 | |
99 | static TranslationUnitDecl *Create(ASTContext &C); |
100 | |
101 | // Implement isa/cast/dyncast/etc. |
102 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
103 | static bool classofKind(Kind K) { return K == TranslationUnit; } |
104 | static DeclContext *castToDeclContext(const TranslationUnitDecl *D) { |
105 | return static_cast<DeclContext *>(const_cast<TranslationUnitDecl*>(D)); |
106 | } |
107 | static TranslationUnitDecl *castFromDeclContext(const DeclContext *DC) { |
108 | return static_cast<TranslationUnitDecl *>(const_cast<DeclContext*>(DC)); |
109 | } |
110 | }; |
111 | |
112 | /// Represents a `#pragma comment` line. Always a child of |
113 | /// TranslationUnitDecl. |
114 | class PragmaCommentDecl final |
115 | : public Decl, |
116 | private llvm::TrailingObjects<PragmaCommentDecl, char> { |
117 | friend class ASTDeclReader; |
118 | friend class ASTDeclWriter; |
119 | friend TrailingObjects; |
120 | |
121 | PragmaMSCommentKind CommentKind; |
122 | |
123 | PragmaCommentDecl(TranslationUnitDecl *TU, SourceLocation CommentLoc, |
124 | PragmaMSCommentKind CommentKind) |
125 | : Decl(PragmaComment, TU, CommentLoc), CommentKind(CommentKind) {} |
126 | |
127 | virtual void anchor(); |
128 | |
129 | public: |
130 | static PragmaCommentDecl *Create(const ASTContext &C, TranslationUnitDecl *DC, |
131 | SourceLocation CommentLoc, |
132 | PragmaMSCommentKind CommentKind, |
133 | StringRef Arg); |
134 | static PragmaCommentDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
135 | unsigned ArgSize); |
136 | |
137 | PragmaMSCommentKind getCommentKind() const { return CommentKind; } |
138 | |
139 | StringRef getArg() const { return getTrailingObjects<char>(); } |
140 | |
141 | // Implement isa/cast/dyncast/etc. |
142 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
143 | static bool classofKind(Kind K) { return K == PragmaComment; } |
144 | }; |
145 | |
146 | /// Represents a `#pragma detect_mismatch` line. Always a child of |
147 | /// TranslationUnitDecl. |
148 | class PragmaDetectMismatchDecl final |
149 | : public Decl, |
150 | private llvm::TrailingObjects<PragmaDetectMismatchDecl, char> { |
151 | friend class ASTDeclReader; |
152 | friend class ASTDeclWriter; |
153 | friend TrailingObjects; |
154 | |
155 | size_t ValueStart; |
156 | |
157 | PragmaDetectMismatchDecl(TranslationUnitDecl *TU, SourceLocation Loc, |
158 | size_t ValueStart) |
159 | : Decl(PragmaDetectMismatch, TU, Loc), ValueStart(ValueStart) {} |
160 | |
161 | virtual void anchor(); |
162 | |
163 | public: |
164 | static PragmaDetectMismatchDecl *Create(const ASTContext &C, |
165 | TranslationUnitDecl *DC, |
166 | SourceLocation Loc, StringRef Name, |
167 | StringRef Value); |
168 | static PragmaDetectMismatchDecl * |
169 | CreateDeserialized(ASTContext &C, unsigned ID, unsigned NameValueSize); |
170 | |
171 | StringRef getName() const { return getTrailingObjects<char>(); } |
172 | StringRef getValue() const { return getTrailingObjects<char>() + ValueStart; } |
173 | |
174 | // Implement isa/cast/dyncast/etc. |
175 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
176 | static bool classofKind(Kind K) { return K == PragmaDetectMismatch; } |
177 | }; |
178 | |
179 | /// Declaration context for names declared as extern "C" in C++. This |
180 | /// is neither the semantic nor lexical context for such declarations, but is |
181 | /// used to check for conflicts with other extern "C" declarations. Example: |
182 | /// |
183 | /// \code |
184 | /// namespace N { extern "C" void f(); } // #1 |
185 | /// void N::f() {} // #2 |
186 | /// namespace M { extern "C" void f(); } // #3 |
187 | /// \endcode |
188 | /// |
189 | /// The semantic context of #1 is namespace N and its lexical context is the |
190 | /// LinkageSpecDecl; the semantic context of #2 is namespace N and its lexical |
191 | /// context is the TU. However, both declarations are also visible in the |
192 | /// extern "C" context. |
193 | /// |
194 | /// The declaration at #3 finds it is a redeclaration of \c N::f through |
195 | /// lookup in the extern "C" context. |
196 | class ExternCContextDecl : public Decl, public DeclContext { |
197 | explicit ExternCContextDecl(TranslationUnitDecl *TU) |
198 | : Decl(ExternCContext, TU, SourceLocation()), |
199 | DeclContext(ExternCContext) {} |
200 | |
201 | virtual void anchor(); |
202 | |
203 | public: |
204 | static ExternCContextDecl *Create(const ASTContext &C, |
205 | TranslationUnitDecl *TU); |
206 | |
207 | // Implement isa/cast/dyncast/etc. |
208 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
209 | static bool classofKind(Kind K) { return K == ExternCContext; } |
210 | static DeclContext *castToDeclContext(const ExternCContextDecl *D) { |
211 | return static_cast<DeclContext *>(const_cast<ExternCContextDecl*>(D)); |
212 | } |
213 | static ExternCContextDecl *castFromDeclContext(const DeclContext *DC) { |
214 | return static_cast<ExternCContextDecl *>(const_cast<DeclContext*>(DC)); |
215 | } |
216 | }; |
217 | |
218 | /// This represents a decl that may have a name. Many decls have names such |
219 | /// as ObjCMethodDecl, but not \@class, etc. |
220 | /// |
221 | /// Note that not every NamedDecl is actually named (e.g., a struct might |
222 | /// be anonymous), and not every name is an identifier. |
223 | class NamedDecl : public Decl { |
224 | /// The name of this declaration, which is typically a normal |
225 | /// identifier but may also be a special kind of name (C++ |
226 | /// constructor, Objective-C selector, etc.) |
227 | DeclarationName Name; |
228 | |
229 | virtual void anchor(); |
230 | |
231 | private: |
232 | NamedDecl *getUnderlyingDeclImpl() LLVM_READONLY__attribute__((__pure__)); |
233 | |
234 | protected: |
235 | NamedDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N) |
236 | : Decl(DK, DC, L), Name(N) {} |
237 | |
238 | public: |
239 | /// Get the identifier that names this declaration, if there is one. |
240 | /// |
241 | /// This will return NULL if this declaration has no name (e.g., for |
242 | /// an unnamed class) or if the name is a special name (C++ constructor, |
243 | /// Objective-C selector, etc.). |
244 | IdentifierInfo *getIdentifier() const { return Name.getAsIdentifierInfo(); } |
245 | |
246 | /// Get the name of identifier for this declaration as a StringRef. |
247 | /// |
248 | /// This requires that the declaration have a name and that it be a simple |
249 | /// identifier. |
250 | StringRef getName() const { |
251 | assert(Name.isIdentifier() && "Name is not a simple identifier")((Name.isIdentifier() && "Name is not a simple identifier" ) ? static_cast<void> (0) : __assert_fail ("Name.isIdentifier() && \"Name is not a simple identifier\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 251, __PRETTY_FUNCTION__)); |
252 | return getIdentifier() ? getIdentifier()->getName() : ""; |
253 | } |
254 | |
255 | /// Get a human-readable name for the declaration, even if it is one of the |
256 | /// special kinds of names (C++ constructor, Objective-C selector, etc). |
257 | /// |
258 | /// Creating this name requires expensive string manipulation, so it should |
259 | /// be called only when performance doesn't matter. For simple declarations, |
260 | /// getNameAsCString() should suffice. |
261 | // |
262 | // FIXME: This function should be renamed to indicate that it is not just an |
263 | // alternate form of getName(), and clients should move as appropriate. |
264 | // |
265 | // FIXME: Deprecated, move clients to getName(). |
266 | std::string getNameAsString() const { return Name.getAsString(); } |
267 | |
268 | /// Pretty-print the unqualified name of this declaration. Can be overloaded |
269 | /// by derived classes to provide a more user-friendly name when appropriate. |
270 | virtual void printName(raw_ostream &os) const; |
271 | |
272 | /// Get the actual, stored name of the declaration, which may be a special |
273 | /// name. |
274 | /// |
275 | /// Note that generally in diagnostics, the non-null \p NamedDecl* itself |
276 | /// should be sent into the diagnostic instead of using the result of |
277 | /// \p getDeclName(). |
278 | /// |
279 | /// A \p DeclarationName in a diagnostic will just be streamed to the output, |
280 | /// which will directly result in a call to \p DeclarationName::print. |
281 | /// |
282 | /// A \p NamedDecl* in a diagnostic will also ultimately result in a call to |
283 | /// \p DeclarationName::print, but with two customisation points along the |
284 | /// way (\p getNameForDiagnostic and \p printName). These are used to print |
285 | /// the template arguments if any, and to provide a user-friendly name for |
286 | /// some entities (such as unnamed variables and anonymous records). |
287 | DeclarationName getDeclName() const { return Name; } |
288 | |
289 | /// Set the name of this declaration. |
290 | void setDeclName(DeclarationName N) { Name = N; } |
291 | |
292 | /// Returns a human-readable qualified name for this declaration, like |
293 | /// A::B::i, for i being member of namespace A::B. |
294 | /// |
295 | /// If the declaration is not a member of context which can be named (record, |
296 | /// namespace), it will return the same result as printName(). |
297 | /// |
298 | /// Creating this name is expensive, so it should be called only when |
299 | /// performance doesn't matter. |
300 | void printQualifiedName(raw_ostream &OS) const; |
301 | void printQualifiedName(raw_ostream &OS, const PrintingPolicy &Policy) const; |
302 | |
303 | /// Print only the nested name specifier part of a fully-qualified name, |
304 | /// including the '::' at the end. E.g. |
305 | /// when `printQualifiedName(D)` prints "A::B::i", |
306 | /// this function prints "A::B::". |
307 | void printNestedNameSpecifier(raw_ostream &OS) const; |
308 | void printNestedNameSpecifier(raw_ostream &OS, |
309 | const PrintingPolicy &Policy) const; |
310 | |
311 | // FIXME: Remove string version. |
312 | std::string getQualifiedNameAsString() const; |
313 | |
314 | /// Appends a human-readable name for this declaration into the given stream. |
315 | /// |
316 | /// This is the method invoked by Sema when displaying a NamedDecl |
317 | /// in a diagnostic. It does not necessarily produce the same |
318 | /// result as printName(); for example, class template |
319 | /// specializations are printed with their template arguments. |
320 | virtual void getNameForDiagnostic(raw_ostream &OS, |
321 | const PrintingPolicy &Policy, |
322 | bool Qualified) const; |
323 | |
324 | /// Determine whether this declaration, if known to be well-formed within |
325 | /// its context, will replace the declaration OldD if introduced into scope. |
326 | /// |
327 | /// A declaration will replace another declaration if, for example, it is |
328 | /// a redeclaration of the same variable or function, but not if it is a |
329 | /// declaration of a different kind (function vs. class) or an overloaded |
330 | /// function. |
331 | /// |
332 | /// \param IsKnownNewer \c true if this declaration is known to be newer |
333 | /// than \p OldD (for instance, if this declaration is newly-created). |
334 | bool declarationReplaces(NamedDecl *OldD, bool IsKnownNewer = true) const; |
335 | |
336 | /// Determine whether this declaration has linkage. |
337 | bool hasLinkage() const; |
338 | |
339 | using Decl::isModulePrivate; |
340 | using Decl::setModulePrivate; |
341 | |
342 | /// Determine whether this declaration is a C++ class member. |
343 | bool isCXXClassMember() const { |
344 | const DeclContext *DC = getDeclContext(); |
345 | |
346 | // C++0x [class.mem]p1: |
347 | // The enumerators of an unscoped enumeration defined in |
348 | // the class are members of the class. |
349 | if (isa<EnumDecl>(DC)) |
350 | DC = DC->getRedeclContext(); |
351 | |
352 | return DC->isRecord(); |
353 | } |
354 | |
355 | /// Determine whether the given declaration is an instance member of |
356 | /// a C++ class. |
357 | bool isCXXInstanceMember() const; |
358 | |
359 | /// Determine what kind of linkage this entity has. |
360 | /// |
361 | /// This is not the linkage as defined by the standard or the codegen notion |
362 | /// of linkage. It is just an implementation detail that is used to compute |
363 | /// those. |
364 | Linkage getLinkageInternal() const; |
365 | |
366 | /// Get the linkage from a semantic point of view. Entities in |
367 | /// anonymous namespaces are external (in c++98). |
368 | Linkage getFormalLinkage() const { |
369 | return clang::getFormalLinkage(getLinkageInternal()); |
370 | } |
371 | |
372 | /// True if this decl has external linkage. |
373 | bool hasExternalFormalLinkage() const { |
374 | return isExternalFormalLinkage(getLinkageInternal()); |
375 | } |
376 | |
377 | bool isExternallyVisible() const { |
378 | return clang::isExternallyVisible(getLinkageInternal()); |
379 | } |
380 | |
381 | /// Determine whether this declaration can be redeclared in a |
382 | /// different translation unit. |
383 | bool isExternallyDeclarable() const { |
384 | return isExternallyVisible() && !getOwningModuleForLinkage(); |
385 | } |
386 | |
387 | /// Determines the visibility of this entity. |
388 | Visibility getVisibility() const { |
389 | return getLinkageAndVisibility().getVisibility(); |
390 | } |
391 | |
392 | /// Determines the linkage and visibility of this entity. |
393 | LinkageInfo getLinkageAndVisibility() const; |
394 | |
395 | /// Kinds of explicit visibility. |
396 | enum ExplicitVisibilityKind { |
397 | /// Do an LV computation for, ultimately, a type. |
398 | /// Visibility may be restricted by type visibility settings and |
399 | /// the visibility of template arguments. |
400 | VisibilityForType, |
401 | |
402 | /// Do an LV computation for, ultimately, a non-type declaration. |
403 | /// Visibility may be restricted by value visibility settings and |
404 | /// the visibility of template arguments. |
405 | VisibilityForValue |
406 | }; |
407 | |
408 | /// If visibility was explicitly specified for this |
409 | /// declaration, return that visibility. |
410 | Optional<Visibility> |
411 | getExplicitVisibility(ExplicitVisibilityKind kind) const; |
412 | |
413 | /// True if the computed linkage is valid. Used for consistency |
414 | /// checking. Should always return true. |
415 | bool isLinkageValid() const; |
416 | |
417 | /// True if something has required us to compute the linkage |
418 | /// of this declaration. |
419 | /// |
420 | /// Language features which can retroactively change linkage (like a |
421 | /// typedef name for linkage purposes) may need to consider this, |
422 | /// but hopefully only in transitory ways during parsing. |
423 | bool hasLinkageBeenComputed() const { |
424 | return hasCachedLinkage(); |
425 | } |
426 | |
427 | /// Looks through UsingDecls and ObjCCompatibleAliasDecls for |
428 | /// the underlying named decl. |
429 | NamedDecl *getUnderlyingDecl() { |
430 | // Fast-path the common case. |
431 | if (this->getKind() != UsingShadow && |
432 | this->getKind() != ConstructorUsingShadow && |
433 | this->getKind() != ObjCCompatibleAlias && |
434 | this->getKind() != NamespaceAlias) |
435 | return this; |
436 | |
437 | return getUnderlyingDeclImpl(); |
438 | } |
439 | const NamedDecl *getUnderlyingDecl() const { |
440 | return const_cast<NamedDecl*>(this)->getUnderlyingDecl(); |
441 | } |
442 | |
443 | NamedDecl *getMostRecentDecl() { |
444 | return cast<NamedDecl>(static_cast<Decl *>(this)->getMostRecentDecl()); |
445 | } |
446 | const NamedDecl *getMostRecentDecl() const { |
447 | return const_cast<NamedDecl*>(this)->getMostRecentDecl(); |
448 | } |
449 | |
450 | ObjCStringFormatFamily getObjCFStringFormattingFamily() const; |
451 | |
452 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
453 | static bool classofKind(Kind K) { return K >= firstNamed && K <= lastNamed; } |
454 | }; |
455 | |
456 | inline raw_ostream &operator<<(raw_ostream &OS, const NamedDecl &ND) { |
457 | ND.printName(OS); |
458 | return OS; |
459 | } |
460 | |
461 | /// Represents the declaration of a label. Labels also have a |
462 | /// corresponding LabelStmt, which indicates the position that the label was |
463 | /// defined at. For normal labels, the location of the decl is the same as the |
464 | /// location of the statement. For GNU local labels (__label__), the decl |
465 | /// location is where the __label__ is. |
466 | class LabelDecl : public NamedDecl { |
467 | LabelStmt *TheStmt; |
468 | StringRef MSAsmName; |
469 | bool MSAsmNameResolved = false; |
470 | |
471 | /// For normal labels, this is the same as the main declaration |
472 | /// label, i.e., the location of the identifier; for GNU local labels, |
473 | /// this is the location of the __label__ keyword. |
474 | SourceLocation LocStart; |
475 | |
476 | LabelDecl(DeclContext *DC, SourceLocation IdentL, IdentifierInfo *II, |
477 | LabelStmt *S, SourceLocation StartL) |
478 | : NamedDecl(Label, DC, IdentL, II), TheStmt(S), LocStart(StartL) {} |
479 | |
480 | void anchor() override; |
481 | |
482 | public: |
483 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
484 | SourceLocation IdentL, IdentifierInfo *II); |
485 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
486 | SourceLocation IdentL, IdentifierInfo *II, |
487 | SourceLocation GnuLabelL); |
488 | static LabelDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
489 | |
490 | LabelStmt *getStmt() const { return TheStmt; } |
491 | void setStmt(LabelStmt *T) { TheStmt = T; } |
492 | |
493 | bool isGnuLocal() const { return LocStart != getLocation(); } |
494 | void setLocStart(SourceLocation L) { LocStart = L; } |
495 | |
496 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
497 | return SourceRange(LocStart, getLocation()); |
498 | } |
499 | |
500 | bool isMSAsmLabel() const { return !MSAsmName.empty(); } |
501 | bool isResolvedMSAsmLabel() const { return isMSAsmLabel() && MSAsmNameResolved; } |
502 | void setMSAsmLabel(StringRef Name); |
503 | StringRef getMSAsmLabel() const { return MSAsmName; } |
504 | void setMSAsmLabelResolved() { MSAsmNameResolved = true; } |
505 | |
506 | // Implement isa/cast/dyncast/etc. |
507 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
508 | static bool classofKind(Kind K) { return K == Label; } |
509 | }; |
510 | |
511 | /// Represent a C++ namespace. |
512 | class NamespaceDecl : public NamedDecl, public DeclContext, |
513 | public Redeclarable<NamespaceDecl> |
514 | { |
515 | /// The starting location of the source range, pointing |
516 | /// to either the namespace or the inline keyword. |
517 | SourceLocation LocStart; |
518 | |
519 | /// The ending location of the source range. |
520 | SourceLocation RBraceLoc; |
521 | |
522 | /// A pointer to either the anonymous namespace that lives just inside |
523 | /// this namespace or to the first namespace in the chain (the latter case |
524 | /// only when this is not the first in the chain), along with a |
525 | /// boolean value indicating whether this is an inline namespace. |
526 | llvm::PointerIntPair<NamespaceDecl *, 1, bool> AnonOrFirstNamespaceAndInline; |
527 | |
528 | NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline, |
529 | SourceLocation StartLoc, SourceLocation IdLoc, |
530 | IdentifierInfo *Id, NamespaceDecl *PrevDecl); |
531 | |
532 | using redeclarable_base = Redeclarable<NamespaceDecl>; |
533 | |
534 | NamespaceDecl *getNextRedeclarationImpl() override; |
535 | NamespaceDecl *getPreviousDeclImpl() override; |
536 | NamespaceDecl *getMostRecentDeclImpl() override; |
537 | |
538 | public: |
539 | friend class ASTDeclReader; |
540 | friend class ASTDeclWriter; |
541 | |
542 | static NamespaceDecl *Create(ASTContext &C, DeclContext *DC, |
543 | bool Inline, SourceLocation StartLoc, |
544 | SourceLocation IdLoc, IdentifierInfo *Id, |
545 | NamespaceDecl *PrevDecl); |
546 | |
547 | static NamespaceDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
548 | |
549 | using redecl_range = redeclarable_base::redecl_range; |
550 | using redecl_iterator = redeclarable_base::redecl_iterator; |
551 | |
552 | using redeclarable_base::redecls_begin; |
553 | using redeclarable_base::redecls_end; |
554 | using redeclarable_base::redecls; |
555 | using redeclarable_base::getPreviousDecl; |
556 | using redeclarable_base::getMostRecentDecl; |
557 | using redeclarable_base::isFirstDecl; |
558 | |
559 | /// Returns true if this is an anonymous namespace declaration. |
560 | /// |
561 | /// For example: |
562 | /// \code |
563 | /// namespace { |
564 | /// ... |
565 | /// }; |
566 | /// \endcode |
567 | /// q.v. C++ [namespace.unnamed] |
568 | bool isAnonymousNamespace() const { |
569 | return !getIdentifier(); |
570 | } |
571 | |
572 | /// Returns true if this is an inline namespace declaration. |
573 | bool isInline() const { |
574 | return AnonOrFirstNamespaceAndInline.getInt(); |
575 | } |
576 | |
577 | /// Set whether this is an inline namespace declaration. |
578 | void setInline(bool Inline) { |
579 | AnonOrFirstNamespaceAndInline.setInt(Inline); |
580 | } |
581 | |
582 | /// Get the original (first) namespace declaration. |
583 | NamespaceDecl *getOriginalNamespace(); |
584 | |
585 | /// Get the original (first) namespace declaration. |
586 | const NamespaceDecl *getOriginalNamespace() const; |
587 | |
588 | /// Return true if this declaration is an original (first) declaration |
589 | /// of the namespace. This is false for non-original (subsequent) namespace |
590 | /// declarations and anonymous namespaces. |
591 | bool isOriginalNamespace() const; |
592 | |
593 | /// Retrieve the anonymous namespace nested inside this namespace, |
594 | /// if any. |
595 | NamespaceDecl *getAnonymousNamespace() const { |
596 | return getOriginalNamespace()->AnonOrFirstNamespaceAndInline.getPointer(); |
597 | } |
598 | |
599 | void setAnonymousNamespace(NamespaceDecl *D) { |
600 | getOriginalNamespace()->AnonOrFirstNamespaceAndInline.setPointer(D); |
601 | } |
602 | |
603 | /// Retrieves the canonical declaration of this namespace. |
604 | NamespaceDecl *getCanonicalDecl() override { |
605 | return getOriginalNamespace(); |
606 | } |
607 | const NamespaceDecl *getCanonicalDecl() const { |
608 | return getOriginalNamespace(); |
609 | } |
610 | |
611 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
612 | return SourceRange(LocStart, RBraceLoc); |
613 | } |
614 | |
615 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LocStart; } |
616 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
617 | void setLocStart(SourceLocation L) { LocStart = L; } |
618 | void setRBraceLoc(SourceLocation L) { RBraceLoc = L; } |
619 | |
620 | // Implement isa/cast/dyncast/etc. |
621 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
622 | static bool classofKind(Kind K) { return K == Namespace; } |
623 | static DeclContext *castToDeclContext(const NamespaceDecl *D) { |
624 | return static_cast<DeclContext *>(const_cast<NamespaceDecl*>(D)); |
625 | } |
626 | static NamespaceDecl *castFromDeclContext(const DeclContext *DC) { |
627 | return static_cast<NamespaceDecl *>(const_cast<DeclContext*>(DC)); |
628 | } |
629 | }; |
630 | |
631 | /// Represent the declaration of a variable (in which case it is |
632 | /// an lvalue) a function (in which case it is a function designator) or |
633 | /// an enum constant. |
634 | class ValueDecl : public NamedDecl { |
635 | QualType DeclType; |
636 | |
637 | void anchor() override; |
638 | |
639 | protected: |
640 | ValueDecl(Kind DK, DeclContext *DC, SourceLocation L, |
641 | DeclarationName N, QualType T) |
642 | : NamedDecl(DK, DC, L, N), DeclType(T) {} |
643 | |
644 | public: |
645 | QualType getType() const { return DeclType; } |
646 | void setType(QualType newType) { DeclType = newType; } |
647 | |
648 | /// Determine whether this symbol is weakly-imported, |
649 | /// or declared with the weak or weak-ref attr. |
650 | bool isWeak() const; |
651 | |
652 | // Implement isa/cast/dyncast/etc. |
653 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
654 | static bool classofKind(Kind K) { return K >= firstValue && K <= lastValue; } |
655 | }; |
656 | |
657 | /// A struct with extended info about a syntactic |
658 | /// name qualifier, to be used for the case of out-of-line declarations. |
659 | struct QualifierInfo { |
660 | NestedNameSpecifierLoc QualifierLoc; |
661 | |
662 | /// The number of "outer" template parameter lists. |
663 | /// The count includes all of the template parameter lists that were matched |
664 | /// against the template-ids occurring into the NNS and possibly (in the |
665 | /// case of an explicit specialization) a final "template <>". |
666 | unsigned NumTemplParamLists = 0; |
667 | |
668 | /// A new-allocated array of size NumTemplParamLists, |
669 | /// containing pointers to the "outer" template parameter lists. |
670 | /// It includes all of the template parameter lists that were matched |
671 | /// against the template-ids occurring into the NNS and possibly (in the |
672 | /// case of an explicit specialization) a final "template <>". |
673 | TemplateParameterList** TemplParamLists = nullptr; |
674 | |
675 | QualifierInfo() = default; |
676 | QualifierInfo(const QualifierInfo &) = delete; |
677 | QualifierInfo& operator=(const QualifierInfo &) = delete; |
678 | |
679 | /// Sets info about "outer" template parameter lists. |
680 | void setTemplateParameterListsInfo(ASTContext &Context, |
681 | ArrayRef<TemplateParameterList *> TPLists); |
682 | }; |
683 | |
684 | /// Represents a ValueDecl that came out of a declarator. |
685 | /// Contains type source information through TypeSourceInfo. |
686 | class DeclaratorDecl : public ValueDecl { |
687 | // A struct representing a TInfo, a trailing requires-clause and a syntactic |
688 | // qualifier, to be used for the (uncommon) case of out-of-line declarations |
689 | // and constrained function decls. |
690 | struct ExtInfo : public QualifierInfo { |
691 | TypeSourceInfo *TInfo; |
692 | Expr *TrailingRequiresClause = nullptr; |
693 | }; |
694 | |
695 | llvm::PointerUnion<TypeSourceInfo *, ExtInfo *> DeclInfo; |
696 | |
697 | /// The start of the source range for this declaration, |
698 | /// ignoring outer template declarations. |
699 | SourceLocation InnerLocStart; |
700 | |
701 | bool hasExtInfo() const { return DeclInfo.is<ExtInfo*>(); } |
702 | ExtInfo *getExtInfo() { return DeclInfo.get<ExtInfo*>(); } |
703 | const ExtInfo *getExtInfo() const { return DeclInfo.get<ExtInfo*>(); } |
704 | |
705 | protected: |
706 | DeclaratorDecl(Kind DK, DeclContext *DC, SourceLocation L, |
707 | DeclarationName N, QualType T, TypeSourceInfo *TInfo, |
708 | SourceLocation StartL) |
709 | : ValueDecl(DK, DC, L, N, T), DeclInfo(TInfo), InnerLocStart(StartL) {} |
710 | |
711 | public: |
712 | friend class ASTDeclReader; |
713 | friend class ASTDeclWriter; |
714 | |
715 | TypeSourceInfo *getTypeSourceInfo() const { |
716 | return hasExtInfo() |
717 | ? getExtInfo()->TInfo |
718 | : DeclInfo.get<TypeSourceInfo*>(); |
719 | } |
720 | |
721 | void setTypeSourceInfo(TypeSourceInfo *TI) { |
722 | if (hasExtInfo()) |
723 | getExtInfo()->TInfo = TI; |
724 | else |
725 | DeclInfo = TI; |
726 | } |
727 | |
728 | /// Return start of source range ignoring outer template declarations. |
729 | SourceLocation getInnerLocStart() const { return InnerLocStart; } |
730 | void setInnerLocStart(SourceLocation L) { InnerLocStart = L; } |
731 | |
732 | /// Return start of source range taking into account any outer template |
733 | /// declarations. |
734 | SourceLocation getOuterLocStart() const; |
735 | |
736 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
737 | |
738 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
739 | return getOuterLocStart(); |
740 | } |
741 | |
742 | /// Retrieve the nested-name-specifier that qualifies the name of this |
743 | /// declaration, if it was present in the source. |
744 | NestedNameSpecifier *getQualifier() const { |
745 | return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier() |
746 | : nullptr; |
747 | } |
748 | |
749 | /// Retrieve the nested-name-specifier (with source-location |
750 | /// information) that qualifies the name of this declaration, if it was |
751 | /// present in the source. |
752 | NestedNameSpecifierLoc getQualifierLoc() const { |
753 | return hasExtInfo() ? getExtInfo()->QualifierLoc |
754 | : NestedNameSpecifierLoc(); |
755 | } |
756 | |
757 | void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc); |
758 | |
759 | /// \brief Get the constraint-expression introduced by the trailing |
760 | /// requires-clause in the function/member declaration, or null if no |
761 | /// requires-clause was provided. |
762 | Expr *getTrailingRequiresClause() { |
763 | return hasExtInfo() ? getExtInfo()->TrailingRequiresClause |
764 | : nullptr; |
765 | } |
766 | |
767 | const Expr *getTrailingRequiresClause() const { |
768 | return hasExtInfo() ? getExtInfo()->TrailingRequiresClause |
769 | : nullptr; |
770 | } |
771 | |
772 | void setTrailingRequiresClause(Expr *TrailingRequiresClause); |
773 | |
774 | unsigned getNumTemplateParameterLists() const { |
775 | return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0; |
776 | } |
777 | |
778 | TemplateParameterList *getTemplateParameterList(unsigned index) const { |
779 | assert(index < getNumTemplateParameterLists())((index < getNumTemplateParameterLists()) ? static_cast< void> (0) : __assert_fail ("index < getNumTemplateParameterLists()" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 779, __PRETTY_FUNCTION__)); |
780 | return getExtInfo()->TemplParamLists[index]; |
781 | } |
782 | |
783 | void setTemplateParameterListsInfo(ASTContext &Context, |
784 | ArrayRef<TemplateParameterList *> TPLists); |
785 | |
786 | SourceLocation getTypeSpecStartLoc() const; |
787 | SourceLocation getTypeSpecEndLoc() const; |
788 | |
789 | // Implement isa/cast/dyncast/etc. |
790 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
791 | static bool classofKind(Kind K) { |
792 | return K >= firstDeclarator && K <= lastDeclarator; |
793 | } |
794 | }; |
795 | |
796 | /// Structure used to store a statement, the constant value to |
797 | /// which it was evaluated (if any), and whether or not the statement |
798 | /// is an integral constant expression (if known). |
799 | struct EvaluatedStmt { |
800 | /// Whether this statement was already evaluated. |
801 | bool WasEvaluated : 1; |
802 | |
803 | /// Whether this statement is being evaluated. |
804 | bool IsEvaluating : 1; |
805 | |
806 | /// Whether this variable is known to have constant initialization. This is |
807 | /// currently only computed in C++, for static / thread storage duration |
808 | /// variables that might have constant initialization and for variables that |
809 | /// are usable in constant expressions. |
810 | bool HasConstantInitialization : 1; |
811 | |
812 | /// Whether this variable is known to have constant destruction. That is, |
813 | /// whether running the destructor on the initial value is a side-effect |
814 | /// (and doesn't inspect any state that might have changed during program |
815 | /// execution). This is currently only computed if the destructor is |
816 | /// non-trivial. |
817 | bool HasConstantDestruction : 1; |
818 | |
819 | /// In C++98, whether the initializer is an ICE. This affects whether the |
820 | /// variable is usable in constant expressions. |
821 | bool HasICEInit : 1; |
822 | bool CheckedForICEInit : 1; |
823 | |
824 | Stmt *Value; |
825 | APValue Evaluated; |
826 | |
827 | EvaluatedStmt() |
828 | : WasEvaluated(false), IsEvaluating(false), |
829 | HasConstantInitialization(false), HasConstantDestruction(false), |
830 | HasICEInit(false), CheckedForICEInit(false) {} |
831 | }; |
832 | |
833 | /// Represents a variable declaration or definition. |
834 | class VarDecl : public DeclaratorDecl, public Redeclarable<VarDecl> { |
835 | public: |
836 | /// Initialization styles. |
837 | enum InitializationStyle { |
838 | /// C-style initialization with assignment |
839 | CInit, |
840 | |
841 | /// Call-style initialization (C++98) |
842 | CallInit, |
843 | |
844 | /// Direct list-initialization (C++11) |
845 | ListInit |
846 | }; |
847 | |
848 | /// Kinds of thread-local storage. |
849 | enum TLSKind { |
850 | /// Not a TLS variable. |
851 | TLS_None, |
852 | |
853 | /// TLS with a known-constant initializer. |
854 | TLS_Static, |
855 | |
856 | /// TLS with a dynamic initializer. |
857 | TLS_Dynamic |
858 | }; |
859 | |
860 | /// Return the string used to specify the storage class \p SC. |
861 | /// |
862 | /// It is illegal to call this function with SC == None. |
863 | static const char *getStorageClassSpecifierString(StorageClass SC); |
864 | |
865 | protected: |
866 | // A pointer union of Stmt * and EvaluatedStmt *. When an EvaluatedStmt, we |
867 | // have allocated the auxiliary struct of information there. |
868 | // |
869 | // TODO: It is a bit unfortunate to use a PointerUnion inside the VarDecl for |
870 | // this as *many* VarDecls are ParmVarDecls that don't have default |
871 | // arguments. We could save some space by moving this pointer union to be |
872 | // allocated in trailing space when necessary. |
873 | using InitType = llvm::PointerUnion<Stmt *, EvaluatedStmt *>; |
874 | |
875 | /// The initializer for this variable or, for a ParmVarDecl, the |
876 | /// C++ default argument. |
877 | mutable InitType Init; |
878 | |
879 | private: |
880 | friend class ASTDeclReader; |
881 | friend class ASTNodeImporter; |
882 | friend class StmtIteratorBase; |
883 | |
884 | class VarDeclBitfields { |
885 | friend class ASTDeclReader; |
886 | friend class VarDecl; |
887 | |
888 | unsigned SClass : 3; |
889 | unsigned TSCSpec : 2; |
890 | unsigned InitStyle : 2; |
891 | |
892 | /// Whether this variable is an ARC pseudo-__strong variable; see |
893 | /// isARCPseudoStrong() for details. |
894 | unsigned ARCPseudoStrong : 1; |
895 | }; |
896 | enum { NumVarDeclBits = 8 }; |
897 | |
898 | protected: |
899 | enum { NumParameterIndexBits = 8 }; |
900 | |
901 | enum DefaultArgKind { |
902 | DAK_None, |
903 | DAK_Unparsed, |
904 | DAK_Uninstantiated, |
905 | DAK_Normal |
906 | }; |
907 | |
908 | enum { NumScopeDepthOrObjCQualsBits = 7 }; |
909 | |
910 | class ParmVarDeclBitfields { |
911 | friend class ASTDeclReader; |
912 | friend class ParmVarDecl; |
913 | |
914 | unsigned : NumVarDeclBits; |
915 | |
916 | /// Whether this parameter inherits a default argument from a |
917 | /// prior declaration. |
918 | unsigned HasInheritedDefaultArg : 1; |
919 | |
920 | /// Describes the kind of default argument for this parameter. By default |
921 | /// this is none. If this is normal, then the default argument is stored in |
922 | /// the \c VarDecl initializer expression unless we were unable to parse |
923 | /// (even an invalid) expression for the default argument. |
924 | unsigned DefaultArgKind : 2; |
925 | |
926 | /// Whether this parameter undergoes K&R argument promotion. |
927 | unsigned IsKNRPromoted : 1; |
928 | |
929 | /// Whether this parameter is an ObjC method parameter or not. |
930 | unsigned IsObjCMethodParam : 1; |
931 | |
932 | /// If IsObjCMethodParam, a Decl::ObjCDeclQualifier. |
933 | /// Otherwise, the number of function parameter scopes enclosing |
934 | /// the function parameter scope in which this parameter was |
935 | /// declared. |
936 | unsigned ScopeDepthOrObjCQuals : NumScopeDepthOrObjCQualsBits; |
937 | |
938 | /// The number of parameters preceding this parameter in the |
939 | /// function parameter scope in which it was declared. |
940 | unsigned ParameterIndex : NumParameterIndexBits; |
941 | }; |
942 | |
943 | class NonParmVarDeclBitfields { |
944 | friend class ASTDeclReader; |
945 | friend class ImplicitParamDecl; |
946 | friend class VarDecl; |
947 | |
948 | unsigned : NumVarDeclBits; |
949 | |
950 | // FIXME: We need something similar to CXXRecordDecl::DefinitionData. |
951 | /// Whether this variable is a definition which was demoted due to |
952 | /// module merge. |
953 | unsigned IsThisDeclarationADemotedDefinition : 1; |
954 | |
955 | /// Whether this variable is the exception variable in a C++ catch |
956 | /// or an Objective-C @catch statement. |
957 | unsigned ExceptionVar : 1; |
958 | |
959 | /// Whether this local variable could be allocated in the return |
960 | /// slot of its function, enabling the named return value optimization |
961 | /// (NRVO). |
962 | unsigned NRVOVariable : 1; |
963 | |
964 | /// Whether this variable is the for-range-declaration in a C++0x |
965 | /// for-range statement. |
966 | unsigned CXXForRangeDecl : 1; |
967 | |
968 | /// Whether this variable is the for-in loop declaration in Objective-C. |
969 | unsigned ObjCForDecl : 1; |
970 | |
971 | /// Whether this variable is (C++1z) inline. |
972 | unsigned IsInline : 1; |
973 | |
974 | /// Whether this variable has (C++1z) inline explicitly specified. |
975 | unsigned IsInlineSpecified : 1; |
976 | |
977 | /// Whether this variable is (C++0x) constexpr. |
978 | unsigned IsConstexpr : 1; |
979 | |
980 | /// Whether this variable is the implicit variable for a lambda |
981 | /// init-capture. |
982 | unsigned IsInitCapture : 1; |
983 | |
984 | /// Whether this local extern variable's previous declaration was |
985 | /// declared in the same block scope. This controls whether we should merge |
986 | /// the type of this declaration with its previous declaration. |
987 | unsigned PreviousDeclInSameBlockScope : 1; |
988 | |
989 | /// Defines kind of the ImplicitParamDecl: 'this', 'self', 'vtt', '_cmd' or |
990 | /// something else. |
991 | unsigned ImplicitParamKind : 3; |
992 | |
993 | unsigned EscapingByref : 1; |
994 | }; |
995 | |
996 | union { |
997 | unsigned AllBits; |
998 | VarDeclBitfields VarDeclBits; |
999 | ParmVarDeclBitfields ParmVarDeclBits; |
1000 | NonParmVarDeclBitfields NonParmVarDeclBits; |
1001 | }; |
1002 | |
1003 | VarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1004 | SourceLocation IdLoc, IdentifierInfo *Id, QualType T, |
1005 | TypeSourceInfo *TInfo, StorageClass SC); |
1006 | |
1007 | using redeclarable_base = Redeclarable<VarDecl>; |
1008 | |
1009 | VarDecl *getNextRedeclarationImpl() override { |
1010 | return getNextRedeclaration(); |
1011 | } |
1012 | |
1013 | VarDecl *getPreviousDeclImpl() override { |
1014 | return getPreviousDecl(); |
1015 | } |
1016 | |
1017 | VarDecl *getMostRecentDeclImpl() override { |
1018 | return getMostRecentDecl(); |
1019 | } |
1020 | |
1021 | public: |
1022 | using redecl_range = redeclarable_base::redecl_range; |
1023 | using redecl_iterator = redeclarable_base::redecl_iterator; |
1024 | |
1025 | using redeclarable_base::redecls_begin; |
1026 | using redeclarable_base::redecls_end; |
1027 | using redeclarable_base::redecls; |
1028 | using redeclarable_base::getPreviousDecl; |
1029 | using redeclarable_base::getMostRecentDecl; |
1030 | using redeclarable_base::isFirstDecl; |
1031 | |
1032 | static VarDecl *Create(ASTContext &C, DeclContext *DC, |
1033 | SourceLocation StartLoc, SourceLocation IdLoc, |
1034 | IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, |
1035 | StorageClass S); |
1036 | |
1037 | static VarDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1038 | |
1039 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1040 | |
1041 | /// Returns the storage class as written in the source. For the |
1042 | /// computed linkage of symbol, see getLinkage. |
1043 | StorageClass getStorageClass() const { |
1044 | return (StorageClass) VarDeclBits.SClass; |
1045 | } |
1046 | void setStorageClass(StorageClass SC); |
1047 | |
1048 | void setTSCSpec(ThreadStorageClassSpecifier TSC) { |
1049 | VarDeclBits.TSCSpec = TSC; |
1050 | assert(VarDeclBits.TSCSpec == TSC && "truncation")((VarDeclBits.TSCSpec == TSC && "truncation") ? static_cast <void> (0) : __assert_fail ("VarDeclBits.TSCSpec == TSC && \"truncation\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1050, __PRETTY_FUNCTION__)); |
1051 | } |
1052 | ThreadStorageClassSpecifier getTSCSpec() const { |
1053 | return static_cast<ThreadStorageClassSpecifier>(VarDeclBits.TSCSpec); |
1054 | } |
1055 | TLSKind getTLSKind() const; |
1056 | |
1057 | /// Returns true if a variable with function scope is a non-static local |
1058 | /// variable. |
1059 | bool hasLocalStorage() const { |
1060 | if (getStorageClass() == SC_None) { |
1061 | // OpenCL v1.2 s6.5.3: The __constant or constant address space name is |
1062 | // used to describe variables allocated in global memory and which are |
1063 | // accessed inside a kernel(s) as read-only variables. As such, variables |
1064 | // in constant address space cannot have local storage. |
1065 | if (getType().getAddressSpace() == LangAS::opencl_constant) |
1066 | return false; |
1067 | // Second check is for C++11 [dcl.stc]p4. |
1068 | return !isFileVarDecl() && getTSCSpec() == TSCS_unspecified; |
1069 | } |
1070 | |
1071 | // Global Named Register (GNU extension) |
1072 | if (getStorageClass() == SC_Register && !isLocalVarDeclOrParm()) |
1073 | return false; |
1074 | |
1075 | // Return true for: Auto, Register. |
1076 | // Return false for: Extern, Static, PrivateExtern, OpenCLWorkGroupLocal. |
1077 | |
1078 | return getStorageClass() >= SC_Auto; |
1079 | } |
1080 | |
1081 | /// Returns true if a variable with function scope is a static local |
1082 | /// variable. |
1083 | bool isStaticLocal() const { |
1084 | return (getStorageClass() == SC_Static || |
1085 | // C++11 [dcl.stc]p4 |
1086 | (getStorageClass() == SC_None && getTSCSpec() == TSCS_thread_local)) |
1087 | && !isFileVarDecl(); |
1088 | } |
1089 | |
1090 | /// Returns true if a variable has extern or __private_extern__ |
1091 | /// storage. |
1092 | bool hasExternalStorage() const { |
1093 | return getStorageClass() == SC_Extern || |
1094 | getStorageClass() == SC_PrivateExtern; |
1095 | } |
1096 | |
1097 | /// Returns true for all variables that do not have local storage. |
1098 | /// |
1099 | /// This includes all global variables as well as static variables declared |
1100 | /// within a function. |
1101 | bool hasGlobalStorage() const { return !hasLocalStorage(); } |
1102 | |
1103 | /// Get the storage duration of this variable, per C++ [basic.stc]. |
1104 | StorageDuration getStorageDuration() const { |
1105 | return hasLocalStorage() ? SD_Automatic : |
1106 | getTSCSpec() ? SD_Thread : SD_Static; |
1107 | } |
1108 | |
1109 | /// Compute the language linkage. |
1110 | LanguageLinkage getLanguageLinkage() const; |
1111 | |
1112 | /// Determines whether this variable is a variable with external, C linkage. |
1113 | bool isExternC() const; |
1114 | |
1115 | /// Determines whether this variable's context is, or is nested within, |
1116 | /// a C++ extern "C" linkage spec. |
1117 | bool isInExternCContext() const; |
1118 | |
1119 | /// Determines whether this variable's context is, or is nested within, |
1120 | /// a C++ extern "C++" linkage spec. |
1121 | bool isInExternCXXContext() const; |
1122 | |
1123 | /// Returns true for local variable declarations other than parameters. |
1124 | /// Note that this includes static variables inside of functions. It also |
1125 | /// includes variables inside blocks. |
1126 | /// |
1127 | /// void foo() { int x; static int y; extern int z; } |
1128 | bool isLocalVarDecl() const { |
1129 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1130 | return false; |
1131 | if (const DeclContext *DC = getLexicalDeclContext()) |
1132 | return DC->getRedeclContext()->isFunctionOrMethod(); |
1133 | return false; |
1134 | } |
1135 | |
1136 | /// Similar to isLocalVarDecl but also includes parameters. |
1137 | bool isLocalVarDeclOrParm() const { |
1138 | return isLocalVarDecl() || getKind() == Decl::ParmVar; |
1139 | } |
1140 | |
1141 | /// Similar to isLocalVarDecl, but excludes variables declared in blocks. |
1142 | bool isFunctionOrMethodVarDecl() const { |
1143 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1144 | return false; |
1145 | const DeclContext *DC = getLexicalDeclContext()->getRedeclContext(); |
1146 | return DC->isFunctionOrMethod() && DC->getDeclKind() != Decl::Block; |
1147 | } |
1148 | |
1149 | /// Determines whether this is a static data member. |
1150 | /// |
1151 | /// This will only be true in C++, and applies to, e.g., the |
1152 | /// variable 'x' in: |
1153 | /// \code |
1154 | /// struct S { |
1155 | /// static int x; |
1156 | /// }; |
1157 | /// \endcode |
1158 | bool isStaticDataMember() const { |
1159 | // If it wasn't static, it would be a FieldDecl. |
1160 | return getKind() != Decl::ParmVar && getDeclContext()->isRecord(); |
1161 | } |
1162 | |
1163 | VarDecl *getCanonicalDecl() override; |
1164 | const VarDecl *getCanonicalDecl() const { |
1165 | return const_cast<VarDecl*>(this)->getCanonicalDecl(); |
1166 | } |
1167 | |
1168 | enum DefinitionKind { |
1169 | /// This declaration is only a declaration. |
1170 | DeclarationOnly, |
1171 | |
1172 | /// This declaration is a tentative definition. |
1173 | TentativeDefinition, |
1174 | |
1175 | /// This declaration is definitely a definition. |
1176 | Definition |
1177 | }; |
1178 | |
1179 | /// Check whether this declaration is a definition. If this could be |
1180 | /// a tentative definition (in C), don't check whether there's an overriding |
1181 | /// definition. |
1182 | DefinitionKind isThisDeclarationADefinition(ASTContext &) const; |
1183 | DefinitionKind isThisDeclarationADefinition() const { |
1184 | return isThisDeclarationADefinition(getASTContext()); |
1185 | } |
1186 | |
1187 | /// Check whether this variable is defined in this translation unit. |
1188 | DefinitionKind hasDefinition(ASTContext &) const; |
1189 | DefinitionKind hasDefinition() const { |
1190 | return hasDefinition(getASTContext()); |
1191 | } |
1192 | |
1193 | /// Get the tentative definition that acts as the real definition in a TU. |
1194 | /// Returns null if there is a proper definition available. |
1195 | VarDecl *getActingDefinition(); |
1196 | const VarDecl *getActingDefinition() const { |
1197 | return const_cast<VarDecl*>(this)->getActingDefinition(); |
1198 | } |
1199 | |
1200 | /// Get the real (not just tentative) definition for this declaration. |
1201 | VarDecl *getDefinition(ASTContext &); |
1202 | const VarDecl *getDefinition(ASTContext &C) const { |
1203 | return const_cast<VarDecl*>(this)->getDefinition(C); |
1204 | } |
1205 | VarDecl *getDefinition() { |
1206 | return getDefinition(getASTContext()); |
1207 | } |
1208 | const VarDecl *getDefinition() const { |
1209 | return const_cast<VarDecl*>(this)->getDefinition(); |
1210 | } |
1211 | |
1212 | /// Determine whether this is or was instantiated from an out-of-line |
1213 | /// definition of a static data member. |
1214 | bool isOutOfLine() const override; |
1215 | |
1216 | /// Returns true for file scoped variable declaration. |
1217 | bool isFileVarDecl() const { |
1218 | Kind K = getKind(); |
1219 | if (K == ParmVar || K == ImplicitParam) |
1220 | return false; |
1221 | |
1222 | if (getLexicalDeclContext()->getRedeclContext()->isFileContext()) |
1223 | return true; |
1224 | |
1225 | if (isStaticDataMember()) |
1226 | return true; |
1227 | |
1228 | return false; |
1229 | } |
1230 | |
1231 | /// Get the initializer for this variable, no matter which |
1232 | /// declaration it is attached to. |
1233 | const Expr *getAnyInitializer() const { |
1234 | const VarDecl *D; |
1235 | return getAnyInitializer(D); |
1236 | } |
1237 | |
1238 | /// Get the initializer for this variable, no matter which |
1239 | /// declaration it is attached to. Also get that declaration. |
1240 | const Expr *getAnyInitializer(const VarDecl *&D) const; |
1241 | |
1242 | bool hasInit() const; |
1243 | const Expr *getInit() const { |
1244 | return const_cast<VarDecl *>(this)->getInit(); |
1245 | } |
1246 | Expr *getInit(); |
1247 | |
1248 | /// Retrieve the address of the initializer expression. |
1249 | Stmt **getInitAddress(); |
1250 | |
1251 | void setInit(Expr *I); |
1252 | |
1253 | /// Get the initializing declaration of this variable, if any. This is |
1254 | /// usually the definition, except that for a static data member it can be |
1255 | /// the in-class declaration. |
1256 | VarDecl *getInitializingDeclaration(); |
1257 | const VarDecl *getInitializingDeclaration() const { |
1258 | return const_cast<VarDecl *>(this)->getInitializingDeclaration(); |
1259 | } |
1260 | |
1261 | /// Determine whether this variable's value might be usable in a |
1262 | /// constant expression, according to the relevant language standard. |
1263 | /// This only checks properties of the declaration, and does not check |
1264 | /// whether the initializer is in fact a constant expression. |
1265 | /// |
1266 | /// This corresponds to C++20 [expr.const]p3's notion of a |
1267 | /// "potentially-constant" variable. |
1268 | bool mightBeUsableInConstantExpressions(const ASTContext &C) const; |
1269 | |
1270 | /// Determine whether this variable's value can be used in a |
1271 | /// constant expression, according to the relevant language standard, |
1272 | /// including checking whether it was initialized by a constant expression. |
1273 | bool isUsableInConstantExpressions(const ASTContext &C) const; |
1274 | |
1275 | EvaluatedStmt *ensureEvaluatedStmt() const; |
1276 | EvaluatedStmt *getEvaluatedStmt() const; |
1277 | |
1278 | /// Attempt to evaluate the value of the initializer attached to this |
1279 | /// declaration, and produce notes explaining why it cannot be evaluated. |
1280 | /// Returns a pointer to the value if evaluation succeeded, 0 otherwise. |
1281 | APValue *evaluateValue() const; |
1282 | |
1283 | private: |
1284 | APValue *evaluateValueImpl(SmallVectorImpl<PartialDiagnosticAt> &Notes, |
1285 | bool IsConstantInitialization) const; |
1286 | |
1287 | public: |
1288 | /// Return the already-evaluated value of this variable's |
1289 | /// initializer, or NULL if the value is not yet known. Returns pointer |
1290 | /// to untyped APValue if the value could not be evaluated. |
1291 | APValue *getEvaluatedValue() const; |
1292 | |
1293 | /// Evaluate the destruction of this variable to determine if it constitutes |
1294 | /// constant destruction. |
1295 | /// |
1296 | /// \pre hasConstantInitialization() |
1297 | /// \return \c true if this variable has constant destruction, \c false if |
1298 | /// not. |
1299 | bool evaluateDestruction(SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1300 | |
1301 | /// Determine whether this variable has constant initialization. |
1302 | /// |
1303 | /// This is only set in two cases: when the language semantics require |
1304 | /// constant initialization (globals in C and some globals in C++), and when |
1305 | /// the variable is usable in constant expressions (constexpr, const int, and |
1306 | /// reference variables in C++). |
1307 | bool hasConstantInitialization() const; |
1308 | |
1309 | /// Determine whether the initializer of this variable is an integer constant |
1310 | /// expression. For use in C++98, where this affects whether the variable is |
1311 | /// usable in constant expressions. |
1312 | bool hasICEInitializer(const ASTContext &Context) const; |
1313 | |
1314 | /// Evaluate the initializer of this variable to determine whether it's a |
1315 | /// constant initializer. Should only be called once, after completing the |
1316 | /// definition of the variable. |
1317 | bool checkForConstantInitialization( |
1318 | SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1319 | |
1320 | void setInitStyle(InitializationStyle Style) { |
1321 | VarDeclBits.InitStyle = Style; |
1322 | } |
1323 | |
1324 | /// The style of initialization for this declaration. |
1325 | /// |
1326 | /// C-style initialization is "int x = 1;". Call-style initialization is |
1327 | /// a C++98 direct-initializer, e.g. "int x(1);". The Init expression will be |
1328 | /// the expression inside the parens or a "ClassType(a,b,c)" class constructor |
1329 | /// expression for class types. List-style initialization is C++11 syntax, |
1330 | /// e.g. "int x{1};". Clients can distinguish between different forms of |
1331 | /// initialization by checking this value. In particular, "int x = {1};" is |
1332 | /// C-style, "int x({1})" is call-style, and "int x{1};" is list-style; the |
1333 | /// Init expression in all three cases is an InitListExpr. |
1334 | InitializationStyle getInitStyle() const { |
1335 | return static_cast<InitializationStyle>(VarDeclBits.InitStyle); |
1336 | } |
1337 | |
1338 | /// Whether the initializer is a direct-initializer (list or call). |
1339 | bool isDirectInit() const { |
1340 | return getInitStyle() != CInit; |
1341 | } |
1342 | |
1343 | /// If this definition should pretend to be a declaration. |
1344 | bool isThisDeclarationADemotedDefinition() const { |
1345 | return isa<ParmVarDecl>(this) ? false : |
1346 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition; |
1347 | } |
1348 | |
1349 | /// This is a definition which should be demoted to a declaration. |
1350 | /// |
1351 | /// In some cases (mostly module merging) we can end up with two visible |
1352 | /// definitions one of which needs to be demoted to a declaration to keep |
1353 | /// the AST invariants. |
1354 | void demoteThisDefinitionToDeclaration() { |
1355 | assert(isThisDeclarationADefinition() && "Not a definition!")((isThisDeclarationADefinition() && "Not a definition!" ) ? static_cast<void> (0) : __assert_fail ("isThisDeclarationADefinition() && \"Not a definition!\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1355, __PRETTY_FUNCTION__)); |
1356 | assert(!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!")((!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!" ) ? static_cast<void> (0) : __assert_fail ("!isa<ParmVarDecl>(this) && \"Cannot demote ParmVarDecls!\"" , "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1356, __PRETTY_FUNCTION__)); |
1357 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition = 1; |
1358 | } |
1359 | |
1360 | /// Determine whether this variable is the exception variable in a |
1361 | /// C++ catch statememt or an Objective-C \@catch statement. |
1362 | bool isExceptionVariable() const { |
1363 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.ExceptionVar; |
1364 | } |
1365 | void setExceptionVariable(bool EV) { |
1366 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1366, __PRETTY_FUNCTION__)); |
1367 | NonParmVarDeclBits.ExceptionVar = EV; |
1368 | } |
1369 | |
1370 | /// Determine whether this local variable can be used with the named |
1371 | /// return value optimization (NRVO). |
1372 | /// |
1373 | /// The named return value optimization (NRVO) works by marking certain |
1374 | /// non-volatile local variables of class type as NRVO objects. These |
1375 | /// locals can be allocated within the return slot of their containing |
1376 | /// function, in which case there is no need to copy the object to the |
1377 | /// return slot when returning from the function. Within the function body, |
1378 | /// each return that returns the NRVO object will have this variable as its |
1379 | /// NRVO candidate. |
1380 | bool isNRVOVariable() const { |
1381 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.NRVOVariable; |
1382 | } |
1383 | void setNRVOVariable(bool NRVO) { |
1384 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1384, __PRETTY_FUNCTION__)); |
1385 | NonParmVarDeclBits.NRVOVariable = NRVO; |
1386 | } |
1387 | |
1388 | /// Determine whether this variable is the for-range-declaration in |
1389 | /// a C++0x for-range statement. |
1390 | bool isCXXForRangeDecl() const { |
1391 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.CXXForRangeDecl; |
1392 | } |
1393 | void setCXXForRangeDecl(bool FRD) { |
1394 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1394, __PRETTY_FUNCTION__)); |
1395 | NonParmVarDeclBits.CXXForRangeDecl = FRD; |
1396 | } |
1397 | |
1398 | /// Determine whether this variable is a for-loop declaration for a |
1399 | /// for-in statement in Objective-C. |
1400 | bool isObjCForDecl() const { |
1401 | return NonParmVarDeclBits.ObjCForDecl; |
1402 | } |
1403 | |
1404 | void setObjCForDecl(bool FRD) { |
1405 | NonParmVarDeclBits.ObjCForDecl = FRD; |
1406 | } |
1407 | |
1408 | /// Determine whether this variable is an ARC pseudo-__strong variable. A |
1409 | /// pseudo-__strong variable has a __strong-qualified type but does not |
1410 | /// actually retain the object written into it. Generally such variables are |
1411 | /// also 'const' for safety. There are 3 cases where this will be set, 1) if |
1412 | /// the variable is annotated with the objc_externally_retained attribute, 2) |
1413 | /// if its 'self' in a non-init method, or 3) if its the variable in an for-in |
1414 | /// loop. |
1415 | bool isARCPseudoStrong() const { return VarDeclBits.ARCPseudoStrong; } |
1416 | void setARCPseudoStrong(bool PS) { VarDeclBits.ARCPseudoStrong = PS; } |
1417 | |
1418 | /// Whether this variable is (C++1z) inline. |
1419 | bool isInline() const { |
1420 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInline; |
1421 | } |
1422 | bool isInlineSpecified() const { |
1423 | return isa<ParmVarDecl>(this) ? false |
1424 | : NonParmVarDeclBits.IsInlineSpecified; |
1425 | } |
1426 | void setInlineSpecified() { |
1427 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1427, __PRETTY_FUNCTION__)); |
1428 | NonParmVarDeclBits.IsInline = true; |
1429 | NonParmVarDeclBits.IsInlineSpecified = true; |
1430 | } |
1431 | void setImplicitlyInline() { |
1432 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1432, __PRETTY_FUNCTION__)); |
1433 | NonParmVarDeclBits.IsInline = true; |
1434 | } |
1435 | |
1436 | /// Whether this variable is (C++11) constexpr. |
1437 | bool isConstexpr() const { |
1438 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsConstexpr; |
1439 | } |
1440 | void setConstexpr(bool IC) { |
1441 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1441, __PRETTY_FUNCTION__)); |
1442 | NonParmVarDeclBits.IsConstexpr = IC; |
1443 | } |
1444 | |
1445 | /// Whether this variable is the implicit variable for a lambda init-capture. |
1446 | bool isInitCapture() const { |
1447 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInitCapture; |
1448 | } |
1449 | void setInitCapture(bool IC) { |
1450 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1450, __PRETTY_FUNCTION__)); |
1451 | NonParmVarDeclBits.IsInitCapture = IC; |
1452 | } |
1453 | |
1454 | /// Determine whether this variable is actually a function parameter pack or |
1455 | /// init-capture pack. |
1456 | bool isParameterPack() const; |
1457 | |
1458 | /// Whether this local extern variable declaration's previous declaration |
1459 | /// was declared in the same block scope. Only correct in C++. |
1460 | bool isPreviousDeclInSameBlockScope() const { |
1461 | return isa<ParmVarDecl>(this) |
1462 | ? false |
1463 | : NonParmVarDeclBits.PreviousDeclInSameBlockScope; |
1464 | } |
1465 | void setPreviousDeclInSameBlockScope(bool Same) { |
1466 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-12~++20210124100612+2afaf072f5c1/clang/include/clang/AST/Decl.h" , 1466, __PRETTY_FUNCTION__)); |
1467 | NonParmVarDeclBits.PreviousDeclInSameBlockScope = Same; |
1468 | } |
1469 | |
1470 | /// Indicates the capture is a __block variable that is captured by a block |
1471 | /// that can potentially escape (a block for which BlockDecl::doesNotEscape |
1472 | /// returns false). |
1473 | bool isEscapingByref() const; |
1474 | |
1475 | /// Indicates the capture is a __block variable that is never captured by an |
1476 | /// escaping block. |
1477 | bool isNonEscapingByref() const; |
1478 | |
1479 | void setEscapingByref() { |
1480 | NonParmVarDeclBits.EscapingByref = true; |
1481 | } |
1482 | |
1483 | /// Retrieve the variable declaration from which this variable could |
1484 | /// be instantiated, if it is an instantiation (rather than a non-template). |
1485 | VarDecl *getTemplateInstantiationPattern() const; |
1486 | |
1487 | /// If this variable is an instantiated static data member of a |
1488 | /// class template specialization, returns the templated static data member |
1489 | /// from which it was instantiated. |
1490 | VarDecl *getInstantiatedFromStaticDataMember() const; |
1491 | |
1492 | /// If this variable is an instantiation of a variable template or a |
1493 | /// static data member of a class template, determine what kind of |
1494 | /// template specialization or instantiation this is. |
1495 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
1496 | |
1497 | /// Get the template specialization kind of this variable for the purposes of |
1498 | /// template instantiation. This differs from getTemplateSpecializationKind() |
1499 | /// for an instantiation of a class-scope explicit specialization. |
1500 | TemplateSpecializationKind |
1501 | getTemplateSpecializationKindForInstantiation() const; |
1502 | |
1503 | /// If this variable is an instantiation of a variable template or a |
1504 | /// static data member of a class template, determine its point of |
1505 | /// instantiation. |
1506 | SourceLocation getPointOfInstantiation() const; |
1507 | |
1508 | /// If this variable is an instantiation of a static data member of a |
1509 | /// class template specialization, retrieves the member specialization |
1510 | /// information. |
1511 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
1512 | |
1513 | /// For a static data member that was instantiated from a static |
1514 | /// data member of a class template, set the template specialiation kind. |
1515 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
1516 | SourceLocation PointOfInstantiation = SourceLocation()); |
1517 | |
1518 | /// Specify that this variable is an instantiation of the |
1519 | /// static data member VD. |
1520 | void setInstantiationOfStaticDataMember(VarDecl *VD, |
1521 | TemplateSpecializationKind TSK); |
1522 | |
1523 | /// Retrieves the variable template that is described by this |
1524 | /// variable declaration. |
1525 | /// |
1526 | /// Every variable template is represented as a VarTemplateDecl and a |
1527 | /// VarDecl. The former contains template properties (such as |
1528 | /// the template parameter lists) while the latter contains the |
1529 | /// actual description of the template's |
1530 | /// contents. VarTemplateDecl::getTemplatedDecl() retrieves the |
1531 | /// VarDecl that from a VarTemplateDecl, while |
1532 | /// getDescribedVarTemplate() retrieves the VarTemplateDecl from |
1533 | /// a VarDecl. |
1534 | VarTemplateDecl *getDescribedVarTemplate() const; |
1535 | |
1536 | void setDescribedVarTemplate(VarTemplateDecl *Template); |
1537 | |
1538 | // Is this variable known to have a definition somewhere in the complete |
1539 | // program? This may be true even if the declaration has internal linkage and |
1540 | // has no definition within this source file. |
1541 | bool isKnownToBeDefined() const; |
1542 | |
1543 | /// Is destruction of this variable entirely suppressed? If so, the variable |
1544 | /// need not have a usable destructor at all. |
1545 | bool isNoDestroy(const ASTContext &) const; |
1546 | |
1547 | /// Would the destruction of this variable have any effect, and if so, what |
1548 | /// kind? |
1549 | QualType::DestructionKind needsDestruction(const ASTContext &Ctx) const; |
1550 | |
1551 | // Implement isa/cast/dyncast/etc. |
1552 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1553 | static bool classofKind(Kind K) { return K >= firstVar && K <= lastVar; } |
1554 | }; |
1555 | |
1556 | class ImplicitParamDecl : public VarDecl { |
1557 | void anchor() override; |
1558 | |
1559 | public: |
1560 | /// Defines the kind of the implicit parameter: is this an implicit parameter |
1561 | /// with pointer to 'this', 'self', '_cmd', virtual table pointers, captured |
1562 | /// context or something else. |
1563 | enum ImplicitParamKind : unsigned { |
1564 |