Bug Summary

File:clang/lib/AST/Expr.cpp
Warning:line 826, column 7
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Expr.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-11/lib/clang/11.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/include -I /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-11/lib/clang/11.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-03-09-184146-41876-1 -x c++ /build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp

/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp

1//===--- Expr.cpp - Expression AST Node Implementation --------------------===//
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 implements the Expr class and subclasses.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/Expr.h"
14#include "clang/AST/APValue.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/DeclCXX.h"
18#include "clang/AST/DeclObjC.h"
19#include "clang/AST/DeclTemplate.h"
20#include "clang/AST/DependencyFlags.h"
21#include "clang/AST/EvaluatedExprVisitor.h"
22#include "clang/AST/ExprCXX.h"
23#include "clang/AST/Mangle.h"
24#include "clang/AST/RecordLayout.h"
25#include "clang/AST/StmtVisitor.h"
26#include "clang/Basic/Builtins.h"
27#include "clang/Basic/CharInfo.h"
28#include "clang/Basic/SourceManager.h"
29#include "clang/Basic/TargetInfo.h"
30#include "clang/Lex/Lexer.h"
31#include "clang/Lex/LiteralSupport.h"
32#include "llvm/Support/ErrorHandling.h"
33#include "llvm/Support/raw_ostream.h"
34#include <algorithm>
35#include <cstring>
36using namespace clang;
37
38const Expr *Expr::getBestDynamicClassTypeExpr() const {
39 const Expr *E = this;
40 while (true) {
41 E = E->ignoreParenBaseCasts();
42
43 // Follow the RHS of a comma operator.
44 if (auto *BO = dyn_cast<BinaryOperator>(E)) {
45 if (BO->getOpcode() == BO_Comma) {
46 E = BO->getRHS();
47 continue;
48 }
49 }
50
51 // Step into initializer for materialized temporaries.
52 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
53 E = MTE->getSubExpr();
54 continue;
55 }
56
57 break;
58 }
59
60 return E;
61}
62
63const CXXRecordDecl *Expr::getBestDynamicClassType() const {
64 const Expr *E = getBestDynamicClassTypeExpr();
65 QualType DerivedType = E->getType();
66 if (const PointerType *PTy = DerivedType->getAs<PointerType>())
67 DerivedType = PTy->getPointeeType();
68
69 if (DerivedType->isDependentType())
70 return nullptr;
71
72 const RecordType *Ty = DerivedType->castAs<RecordType>();
73 Decl *D = Ty->getDecl();
74 return cast<CXXRecordDecl>(D);
75}
76
77const Expr *Expr::skipRValueSubobjectAdjustments(
78 SmallVectorImpl<const Expr *> &CommaLHSs,
79 SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
80 const Expr *E = this;
81 while (true) {
82 E = E->IgnoreParens();
83
84 if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
85 if ((CE->getCastKind() == CK_DerivedToBase ||
86 CE->getCastKind() == CK_UncheckedDerivedToBase) &&
87 E->getType()->isRecordType()) {
88 E = CE->getSubExpr();
89 auto *Derived =
90 cast<CXXRecordDecl>(E->getType()->castAs<RecordType>()->getDecl());
91 Adjustments.push_back(SubobjectAdjustment(CE, Derived));
92 continue;
93 }
94
95 if (CE->getCastKind() == CK_NoOp) {
96 E = CE->getSubExpr();
97 continue;
98 }
99 } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
100 if (!ME->isArrow()) {
101 assert(ME->getBase()->getType()->isRecordType())((ME->getBase()->getType()->isRecordType()) ? static_cast
<void> (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 101, __PRETTY_FUNCTION__))
;
102 if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
103 if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
104 E = ME->getBase();
105 Adjustments.push_back(SubobjectAdjustment(Field));
106 continue;
107 }
108 }
109 }
110 } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
111 if (BO->getOpcode() == BO_PtrMemD) {
112 assert(BO->getRHS()->isRValue())((BO->getRHS()->isRValue()) ? static_cast<void> (
0) : __assert_fail ("BO->getRHS()->isRValue()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 112, __PRETTY_FUNCTION__))
;
113 E = BO->getLHS();
114 const MemberPointerType *MPT =
115 BO->getRHS()->getType()->getAs<MemberPointerType>();
116 Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
117 continue;
118 } else if (BO->getOpcode() == BO_Comma) {
119 CommaLHSs.push_back(BO->getLHS());
120 E = BO->getRHS();
121 continue;
122 }
123 }
124
125 // Nothing changed.
126 break;
127 }
128 return E;
129}
130
131bool Expr::isKnownToHaveBooleanValue(bool Semantic) const {
132 const Expr *E = IgnoreParens();
133
134 // If this value has _Bool type, it is obvious 0/1.
135 if (E->getType()->isBooleanType()) return true;
136 // If this is a non-scalar-integer type, we don't care enough to try.
137 if (!E->getType()->isIntegralOrEnumerationType()) return false;
138
139 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
140 switch (UO->getOpcode()) {
141 case UO_Plus:
142 return UO->getSubExpr()->isKnownToHaveBooleanValue(Semantic);
143 case UO_LNot:
144 return true;
145 default:
146 return false;
147 }
148 }
149
150 // Only look through implicit casts. If the user writes
151 // '(int) (a && b)' treat it as an arbitrary int.
152 // FIXME: Should we look through any cast expression in !Semantic mode?
153 if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
154 return CE->getSubExpr()->isKnownToHaveBooleanValue(Semantic);
155
156 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
157 switch (BO->getOpcode()) {
158 default: return false;
159 case BO_LT: // Relational operators.
160 case BO_GT:
161 case BO_LE:
162 case BO_GE:
163 case BO_EQ: // Equality operators.
164 case BO_NE:
165 case BO_LAnd: // AND operator.
166 case BO_LOr: // Logical OR operator.
167 return true;
168
169 case BO_And: // Bitwise AND operator.
170 case BO_Xor: // Bitwise XOR operator.
171 case BO_Or: // Bitwise OR operator.
172 // Handle things like (x==2)|(y==12).
173 return BO->getLHS()->isKnownToHaveBooleanValue(Semantic) &&
174 BO->getRHS()->isKnownToHaveBooleanValue(Semantic);
175
176 case BO_Comma:
177 case BO_Assign:
178 return BO->getRHS()->isKnownToHaveBooleanValue(Semantic);
179 }
180 }
181
182 if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
183 return CO->getTrueExpr()->isKnownToHaveBooleanValue(Semantic) &&
184 CO->getFalseExpr()->isKnownToHaveBooleanValue(Semantic);
185
186 if (isa<ObjCBoolLiteralExpr>(E))
187 return true;
188
189 if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E))
190 return OVE->getSourceExpr()->isKnownToHaveBooleanValue(Semantic);
191
192 if (const FieldDecl *FD = E->getSourceBitField())
193 if (!Semantic && FD->getType()->isUnsignedIntegerType() &&
194 !FD->getBitWidth()->isValueDependent() &&
195 FD->getBitWidthValue(FD->getASTContext()) == 1)
196 return true;
197
198 return false;
199}
200
201// Amusing macro metaprogramming hack: check whether a class provides
202// a more specific implementation of getExprLoc().
203//
204// See also Stmt.cpp:{getBeginLoc(),getEndLoc()}.
205namespace {
206 /// This implementation is used when a class provides a custom
207 /// implementation of getExprLoc.
208 template <class E, class T>
209 SourceLocation getExprLocImpl(const Expr *expr,
210 SourceLocation (T::*v)() const) {
211 return static_cast<const E*>(expr)->getExprLoc();
212 }
213
214 /// This implementation is used when a class doesn't provide
215 /// a custom implementation of getExprLoc. Overload resolution
216 /// should pick it over the implementation above because it's
217 /// more specialized according to function template partial ordering.
218 template <class E>
219 SourceLocation getExprLocImpl(const Expr *expr,
220 SourceLocation (Expr::*v)() const) {
221 return static_cast<const E *>(expr)->getBeginLoc();
222 }
223}
224
225SourceLocation Expr::getExprLoc() const {
226 switch (getStmtClass()) {
227 case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 227)
;
228#define ABSTRACT_STMT(type)
229#define STMT(type, base) \
230 case Stmt::type##Class: break;
231#define EXPR(type, base) \
232 case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
233#include "clang/AST/StmtNodes.inc"
234 }
235 llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 235)
;
236}
237
238//===----------------------------------------------------------------------===//
239// Primary Expressions.
240//===----------------------------------------------------------------------===//
241
242static void AssertResultStorageKind(ConstantExpr::ResultStorageKind Kind) {
243 assert((Kind == ConstantExpr::RSK_APValue ||(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 245, __PRETTY_FUNCTION__))
244 Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) &&(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 245, __PRETTY_FUNCTION__))
245 "Invalid StorageKind Value")(((Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::
RSK_Int64 || Kind == ConstantExpr::RSK_None) && "Invalid StorageKind Value"
) ? static_cast<void> (0) : __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 245, __PRETTY_FUNCTION__))
;
246}
247
248ConstantExpr::ResultStorageKind
249ConstantExpr::getStorageKind(const APValue &Value) {
250 switch (Value.getKind()) {
251 case APValue::None:
252 case APValue::Indeterminate:
253 return ConstantExpr::RSK_None;
254 case APValue::Int:
255 if (!Value.getInt().needsCleanup())
256 return ConstantExpr::RSK_Int64;
257 LLVM_FALLTHROUGH[[gnu::fallthrough]];
258 default:
259 return ConstantExpr::RSK_APValue;
260 }
261}
262
263ConstantExpr::ResultStorageKind
264ConstantExpr::getStorageKind(const Type *T, const ASTContext &Context) {
265 if (T->isIntegralOrEnumerationType() && Context.getTypeInfo(T).Width <= 64)
266 return ConstantExpr::RSK_Int64;
267 return ConstantExpr::RSK_APValue;
268}
269
270void ConstantExpr::DefaultInit(ResultStorageKind StorageKind) {
271 ConstantExprBits.ResultKind = StorageKind;
272 ConstantExprBits.APValueKind = APValue::None;
273 ConstantExprBits.HasCleanup = false;
274 if (StorageKind == ConstantExpr::RSK_APValue)
275 ::new (getTrailingObjects<APValue>()) APValue();
276}
277
278ConstantExpr::ConstantExpr(Expr *subexpr, ResultStorageKind StorageKind)
279 : FullExpr(ConstantExprClass, subexpr) {
280 DefaultInit(StorageKind);
281}
282
283ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
284 ResultStorageKind StorageKind,
285 bool IsImmediateInvocation) {
286 assert(!isa<ConstantExpr>(E))((!isa<ConstantExpr>(E)) ? static_cast<void> (0) :
__assert_fail ("!isa<ConstantExpr>(E)", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 286, __PRETTY_FUNCTION__))
;
287 AssertResultStorageKind(StorageKind);
288 unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
289 StorageKind == ConstantExpr::RSK_APValue,
290 StorageKind == ConstantExpr::RSK_Int64);
291 void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
292 ConstantExpr *Self = new (Mem) ConstantExpr(E, StorageKind);
293 Self->ConstantExprBits.IsImmediateInvocation =
294 IsImmediateInvocation;
295 return Self;
296}
297
298ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
299 const APValue &Result) {
300 ResultStorageKind StorageKind = getStorageKind(Result);
301 ConstantExpr *Self = Create(Context, E, StorageKind);
302 Self->SetResult(Result, Context);
303 return Self;
304}
305
306ConstantExpr::ConstantExpr(ResultStorageKind StorageKind, EmptyShell Empty)
307 : FullExpr(ConstantExprClass, Empty) {
308 DefaultInit(StorageKind);
309}
310
311ConstantExpr *ConstantExpr::CreateEmpty(const ASTContext &Context,
312 ResultStorageKind StorageKind,
313 EmptyShell Empty) {
314 AssertResultStorageKind(StorageKind);
315 unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
316 StorageKind == ConstantExpr::RSK_APValue,
317 StorageKind == ConstantExpr::RSK_Int64);
318 void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
319 ConstantExpr *Self = new (Mem) ConstantExpr(StorageKind, Empty);
320 return Self;
321}
322
323void ConstantExpr::MoveIntoResult(APValue &Value, const ASTContext &Context) {
324 assert((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind &&(((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind
&& "Invalid storage for this value kind") ? static_cast
<void> (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 325, __PRETTY_FUNCTION__))
325 "Invalid storage for this value kind")(((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind
&& "Invalid storage for this value kind") ? static_cast
<void> (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 325, __PRETTY_FUNCTION__))
;
326 ConstantExprBits.APValueKind = Value.getKind();
327 switch (ConstantExprBits.ResultKind) {
328 case RSK_None:
329 return;
330 case RSK_Int64:
331 Int64Result() = *Value.getInt().getRawData();
332 ConstantExprBits.BitWidth = Value.getInt().getBitWidth();
333 ConstantExprBits.IsUnsigned = Value.getInt().isUnsigned();
334 return;
335 case RSK_APValue:
336 if (!ConstantExprBits.HasCleanup && Value.needsCleanup()) {
337 ConstantExprBits.HasCleanup = true;
338 Context.addDestruction(&APValueResult());
339 }
340 APValueResult() = std::move(Value);
341 return;
342 }
343 llvm_unreachable("Invalid ResultKind Bits")::llvm::llvm_unreachable_internal("Invalid ResultKind Bits", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 343)
;
344}
345
346llvm::APSInt ConstantExpr::getResultAsAPSInt() const {
347 switch (ConstantExprBits.ResultKind) {
348 case ConstantExpr::RSK_APValue:
349 return APValueResult().getInt();
350 case ConstantExpr::RSK_Int64:
351 return llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
352 ConstantExprBits.IsUnsigned);
353 default:
354 llvm_unreachable("invalid Accessor")::llvm::llvm_unreachable_internal("invalid Accessor", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 354)
;
355 }
356}
357
358APValue ConstantExpr::getAPValueResult() const {
359 switch (ConstantExprBits.ResultKind) {
360 case ConstantExpr::RSK_APValue:
361 return APValueResult();
362 case ConstantExpr::RSK_Int64:
363 return APValue(
364 llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
365 ConstantExprBits.IsUnsigned));
366 case ConstantExpr::RSK_None:
367 return APValue();
368 }
369 llvm_unreachable("invalid ResultKind")::llvm::llvm_unreachable_internal("invalid ResultKind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 369)
;
370}
371
372/// Compute the type-, value-, and instantiation-dependence of a
373/// declaration reference
374/// based on the declaration being referenced.
375static ExprDependence computeDeclRefDependence(const ASTContext &Ctx,
376 NamedDecl *D, QualType T) {
377 auto R = ExprDependence::None;
378 if (D->isParameterPack())
379 R |= ExprDependence::UnexpandedPack;
380
381 // (TD) C++ [temp.dep.expr]p3:
382 // An id-expression is type-dependent if it contains:
383 //
384 // and
385 //
386 // (VD) C++ [temp.dep.constexpr]p2:
387 // An identifier is value-dependent if it is:
388
389 // (TD) - an identifier that was declared with dependent type
390 // (VD) - a name declared with a dependent type,
391 if (T->isDependentType())
392 return R | ExprDependence::TypeValueInstantiation;
393 else if (T->isInstantiationDependentType())
394 R |= ExprDependence::Instantiation;
395
396 // (TD) - a conversion-function-id that specifies a dependent type
397 if (D->getDeclName().getNameKind()
398 == DeclarationName::CXXConversionFunctionName) {
399 QualType T = D->getDeclName().getCXXNameType();
400 if (T->isDependentType())
401 return R | ExprDependence::TypeValueInstantiation;
402
403 if (T->isInstantiationDependentType())
404 R |= ExprDependence::Instantiation;
405 }
406
407 // (VD) - the name of a non-type template parameter,
408 if (isa<NonTypeTemplateParmDecl>(D))
409 return R | ExprDependence::ValueInstantiation;
410
411 // (VD) - a constant with integral or enumeration type and is
412 // initialized with an expression that is value-dependent.
413 // (VD) - a constant with literal type and is initialized with an
414 // expression that is value-dependent [C++11].
415 // (VD) - FIXME: Missing from the standard:
416 // - an entity with reference type and is initialized with an
417 // expression that is value-dependent [C++11]
418 if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
419 if ((Ctx.getLangOpts().CPlusPlus11 ?
420 Var->getType()->isLiteralType(Ctx) :
421 Var->getType()->isIntegralOrEnumerationType()) &&
422 (Var->getType().isConstQualified() ||
423 Var->getType()->isReferenceType())) {
424 if (const Expr *Init = Var->getAnyInitializer())
425 if (Init->isValueDependent()) {
426 R |= ExprDependence::ValueInstantiation;
427 }
428 }
429
430 // (VD) - FIXME: Missing from the standard:
431 // - a member function or a static data member of the current
432 // instantiation
433 if (Var->isStaticDataMember() &&
434 Var->getDeclContext()->isDependentContext()) {
435 R |= ExprDependence::ValueInstantiation;
436 TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
437 if (TInfo->getType()->isIncompleteArrayType())
438 R |= ExprDependence::Type;
439 }
440
441 return R;
442 }
443
444 // (VD) - FIXME: Missing from the standard:
445 // - a member function or a static data member of the current
446 // instantiation
447 if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext())
448 R |= ExprDependence::ValueInstantiation;
449 return R;
450}
451
452DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D,
453 bool RefersToEnclosingVariableOrCapture, QualType T,
454 ExprValueKind VK, SourceLocation L,
455 const DeclarationNameLoc &LocInfo,
456 NonOdrUseReason NOUR)
457 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
458 D(D), DNLoc(LocInfo) {
459 DeclRefExprBits.HasQualifier = false;
460 DeclRefExprBits.HasTemplateKWAndArgsInfo = false;
461 DeclRefExprBits.HasFoundDecl = false;
462 DeclRefExprBits.HadMultipleCandidates = false;
463 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
464 RefersToEnclosingVariableOrCapture;
465 DeclRefExprBits.NonOdrUseReason = NOUR;
466 DeclRefExprBits.Loc = L;
467 addDependence(computeDeclRefDependence(Ctx, getDecl(), getType()));
468}
469
470DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
471 NestedNameSpecifierLoc QualifierLoc,
472 SourceLocation TemplateKWLoc, ValueDecl *D,
473 bool RefersToEnclosingVariableOrCapture,
474 const DeclarationNameInfo &NameInfo, NamedDecl *FoundD,
475 const TemplateArgumentListInfo *TemplateArgs,
476 QualType T, ExprValueKind VK, NonOdrUseReason NOUR)
477 : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
478 D(D), DNLoc(NameInfo.getInfo()) {
479 DeclRefExprBits.Loc = NameInfo.getLoc();
480 DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
481 if (QualifierLoc) {
482 new (getTrailingObjects<NestedNameSpecifierLoc>())
483 NestedNameSpecifierLoc(QualifierLoc);
484 auto *NNS = QualifierLoc.getNestedNameSpecifier();
485 if (NNS->isInstantiationDependent())
486 addDependence(ExprDependence::Instantiation);
487 if (NNS->containsUnexpandedParameterPack())
488 addDependence(ExprDependence::UnexpandedPack);
489 }
490 DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
491 if (FoundD)
492 *getTrailingObjects<NamedDecl *>() = FoundD;
493 DeclRefExprBits.HasTemplateKWAndArgsInfo
494 = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
495 DeclRefExprBits.RefersToEnclosingVariableOrCapture =
496 RefersToEnclosingVariableOrCapture;
497 DeclRefExprBits.NonOdrUseReason = NOUR;
498 if (TemplateArgs) {
499 auto Deps = TemplateArgumentDependence::None;
500 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
501 TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
502 Deps);
503 assert(!(Deps & TemplateArgumentDependence::Dependent) &&((!(Deps & TemplateArgumentDependence::Dependent) &&
"built a DeclRefExpr with dependent template args") ? static_cast
<void> (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 504, __PRETTY_FUNCTION__))
504 "built a DeclRefExpr with dependent template args")((!(Deps & TemplateArgumentDependence::Dependent) &&
"built a DeclRefExpr with dependent template args") ? static_cast
<void> (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 504, __PRETTY_FUNCTION__))
;
505 addDependence(toExprDependence(Deps));
506 } else if (TemplateKWLoc.isValid()) {
507 getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
508 TemplateKWLoc);
509 }
510 DeclRefExprBits.HadMultipleCandidates = 0;
511 addDependence(computeDeclRefDependence(Ctx, getDecl(), getType()));
512}
513
514DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
515 NestedNameSpecifierLoc QualifierLoc,
516 SourceLocation TemplateKWLoc, ValueDecl *D,
517 bool RefersToEnclosingVariableOrCapture,
518 SourceLocation NameLoc, QualType T,
519 ExprValueKind VK, NamedDecl *FoundD,
520 const TemplateArgumentListInfo *TemplateArgs,
521 NonOdrUseReason NOUR) {
522 return Create(Context, QualifierLoc, TemplateKWLoc, D,
523 RefersToEnclosingVariableOrCapture,
524 DeclarationNameInfo(D->getDeclName(), NameLoc),
525 T, VK, FoundD, TemplateArgs, NOUR);
526}
527
528DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
529 NestedNameSpecifierLoc QualifierLoc,
530 SourceLocation TemplateKWLoc, ValueDecl *D,
531 bool RefersToEnclosingVariableOrCapture,
532 const DeclarationNameInfo &NameInfo,
533 QualType T, ExprValueKind VK,
534 NamedDecl *FoundD,
535 const TemplateArgumentListInfo *TemplateArgs,
536 NonOdrUseReason NOUR) {
537 // Filter out cases where the found Decl is the same as the value refenenced.
538 if (D == FoundD)
539 FoundD = nullptr;
540
541 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
542 std::size_t Size =
543 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
544 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
545 QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
546 HasTemplateKWAndArgsInfo ? 1 : 0,
547 TemplateArgs ? TemplateArgs->size() : 0);
548
549 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
550 return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
551 RefersToEnclosingVariableOrCapture, NameInfo,
552 FoundD, TemplateArgs, T, VK, NOUR);
553}
554
555DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
556 bool HasQualifier,
557 bool HasFoundDecl,
558 bool HasTemplateKWAndArgsInfo,
559 unsigned NumTemplateArgs) {
560 assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)((NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo) ? static_cast
<void> (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 560, __PRETTY_FUNCTION__))
;
561 std::size_t Size =
562 totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
563 ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
564 HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
565 NumTemplateArgs);
566 void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
567 return new (Mem) DeclRefExpr(EmptyShell());
568}
569
570SourceLocation DeclRefExpr::getBeginLoc() const {
571 if (hasQualifier())
572 return getQualifierLoc().getBeginLoc();
573 return getNameInfo().getBeginLoc();
574}
575SourceLocation DeclRefExpr::getEndLoc() const {
576 if (hasExplicitTemplateArgs())
577 return getRAngleLoc();
578 return getNameInfo().getEndLoc();
579}
580
581PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK,
582 StringLiteral *SL)
583 : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
584 FNTy->isDependentType(), FNTy->isDependentType(),
585 FNTy->isInstantiationDependentType(),
586 /*ContainsUnexpandedParameterPack=*/false) {
587 PredefinedExprBits.Kind = IK;
588 assert((getIdentKind() == IK) &&(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 589, __PRETTY_FUNCTION__))
589 "IdentKind do not fit in PredefinedExprBitfields!")(((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? static_cast<void> (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 589, __PRETTY_FUNCTION__))
;
590 bool HasFunctionName = SL != nullptr;
591 PredefinedExprBits.HasFunctionName = HasFunctionName;
592 PredefinedExprBits.Loc = L;
593 if (HasFunctionName)
594 setFunctionName(SL);
595}
596
597PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName)
598 : Expr(PredefinedExprClass, Empty) {
599 PredefinedExprBits.HasFunctionName = HasFunctionName;
600}
601
602PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L,
603 QualType FNTy, IdentKind IK,
604 StringLiteral *SL) {
605 bool HasFunctionName = SL != nullptr;
606 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
607 alignof(PredefinedExpr));
608 return new (Mem) PredefinedExpr(L, FNTy, IK, SL);
609}
610
611PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx,
612 bool HasFunctionName) {
613 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
614 alignof(PredefinedExpr));
615 return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName);
616}
617
618StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) {
619 switch (IK) {
620 case Func:
621 return "__func__";
622 case Function:
623 return "__FUNCTION__";
624 case FuncDName:
625 return "__FUNCDNAME__";
626 case LFunction:
627 return "L__FUNCTION__";
628 case PrettyFunction:
629 return "__PRETTY_FUNCTION__";
630 case FuncSig:
631 return "__FUNCSIG__";
632 case LFuncSig:
633 return "L__FUNCSIG__";
634 case PrettyFunctionNoVirtual:
635 break;
636 }
637 llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 637)
;
638}
639
640// FIXME: Maybe this should use DeclPrinter with a special "print predefined
641// expr" policy instead.
642std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) {
643 ASTContext &Context = CurrentDecl->getASTContext();
644
645 if (IK == PredefinedExpr::FuncDName) {
1
Assuming 'IK' is not equal to FuncDName
2
Taking false branch
646 if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
647 std::unique_ptr<MangleContext> MC;
648 MC.reset(Context.createMangleContext());
649
650 if (MC->shouldMangleDeclName(ND)) {
651 SmallString<256> Buffer;
652 llvm::raw_svector_ostream Out(Buffer);
653 GlobalDecl GD;
654 if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
655 GD = GlobalDecl(CD, Ctor_Base);
656 else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
657 GD = GlobalDecl(DD, Dtor_Base);
658 else
659 GD = GlobalDecl(ND);
660 MC->mangleName(GD, Out);
661
662 if (!Buffer.empty() && Buffer.front() == '\01')
663 return std::string(Buffer.substr(1));
664 return std::string(Buffer.str());
665 } else
666 return std::string(ND->getIdentifier()->getName());
667 }
668 return "";
669 }
670 if (isa<BlockDecl>(CurrentDecl)) {
3
Assuming 'CurrentDecl' is not a 'BlockDecl'
4
Taking false branch
671 // For blocks we only emit something if it is enclosed in a function
672 // For top-level block we'd like to include the name of variable, but we
673 // don't have it at this point.
674 auto DC = CurrentDecl->getDeclContext();
675 if (DC->isFileContext())
676 return "";
677
678 SmallString<256> Buffer;
679 llvm::raw_svector_ostream Out(Buffer);
680 if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
681 // For nested blocks, propagate up to the parent.
682 Out << ComputeName(IK, DCBlock);
683 else if (auto *DCDecl = dyn_cast<Decl>(DC))
684 Out << ComputeName(IK, DCDecl) << "_block_invoke";
685 return std::string(Out.str());
686 }
687 if (const FunctionDecl *FD
5.1
'FD' is non-null
5.1
'FD' is non-null
= dyn_cast<FunctionDecl>(CurrentDecl)) {
5
Assuming 'CurrentDecl' is a 'FunctionDecl'
6
Taking true branch
688 if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual &&
7
Assuming 'IK' is equal to PrettyFunction
689 IK != FuncSig && IK != LFuncSig)
690 return FD->getNameAsString();
691
692 SmallString<256> Name;
693 llvm::raw_svector_ostream Out(Name);
694
695 if (const CXXMethodDecl *MD
8.1
'MD' is null
8.1
'MD' is null
= dyn_cast<CXXMethodDecl>(FD)) {
8
Assuming 'FD' is not a 'CXXMethodDecl'
9
Taking false branch
696 if (MD->isVirtual() && IK != PrettyFunctionNoVirtual)
697 Out << "virtual ";
698 if (MD->isStatic())
699 Out << "static ";
700 }
701
702 PrintingPolicy Policy(Context.getLangOpts());
703 std::string Proto;
704 llvm::raw_string_ostream POut(Proto);
705
706 const FunctionDecl *Decl = FD;
707 if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
10
Assuming 'Pattern' is null
11
Taking false branch
708 Decl = Pattern;
709 const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
12
Assuming the object is not a 'FunctionType'
13
'AFT' initialized to a null pointer value
710 const FunctionProtoType *FT = nullptr;
711 if (FD->hasWrittenPrototype())
14
Assuming the condition is false
15
Taking false branch
712 FT = dyn_cast<FunctionProtoType>(AFT);
713
714 if (IK
15.1
'IK' is not equal to FuncSig
15.1
'IK' is not equal to FuncSig
== FuncSig || IK
15.2
'IK' is not equal to LFuncSig
15.2
'IK' is not equal to LFuncSig
== LFuncSig) {
16
Taking false branch
715 switch (AFT->getCallConv()) {
716 case CC_C: POut << "__cdecl "; break;
717 case CC_X86StdCall: POut << "__stdcall "; break;
718 case CC_X86FastCall: POut << "__fastcall "; break;
719 case CC_X86ThisCall: POut << "__thiscall "; break;
720 case CC_X86VectorCall: POut << "__vectorcall "; break;
721 case CC_X86RegCall: POut << "__regcall "; break;
722 // Only bother printing the conventions that MSVC knows about.
723 default: break;
724 }
725 }
726
727 FD->printQualifiedName(POut, Policy);
728
729 POut << "(";
730 if (FT
16.1
'FT' is null
16.1
'FT' is null
) {
17
Taking false branch
731 for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
732 if (i) POut << ", ";
733 POut << Decl->getParamDecl(i)->getType().stream(Policy);
734 }
735
736 if (FT->isVariadic()) {
737 if (FD->getNumParams()) POut << ", ";
738 POut << "...";
739 } else if ((IK == FuncSig || IK == LFuncSig ||
740 !Context.getLangOpts().CPlusPlus) &&
741 !Decl->getNumParams()) {
742 POut << "void";
743 }
744 }
745 POut << ")";
746
747 if (const CXXMethodDecl *MD
18.1
'MD' is null
18.1
'MD' is null
= dyn_cast<CXXMethodDecl>(FD)) {
18
'FD' is not a 'CXXMethodDecl'
19
Taking false branch
748 assert(FT && "We must have a written prototype in this case.")((FT && "We must have a written prototype in this case."
) ? static_cast<void> (0) : __assert_fail ("FT && \"We must have a written prototype in this case.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 748, __PRETTY_FUNCTION__))
;
749 if (FT->isConst())
750 POut << " const";
751 if (FT->isVolatile())
752 POut << " volatile";
753 RefQualifierKind Ref = MD->getRefQualifier();
754 if (Ref == RQ_LValue)
755 POut << " &";
756 else if (Ref == RQ_RValue)
757 POut << " &&";
758 }
759
760 typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
761 SpecsTy Specs;
762 const DeclContext *Ctx = FD->getDeclContext();
763 while (Ctx && isa<NamedDecl>(Ctx)) {
20
Assuming 'Ctx' is null
764 const ClassTemplateSpecializationDecl *Spec
765 = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
766 if (Spec && !Spec->isExplicitSpecialization())
767 Specs.push_back(Spec);
768 Ctx = Ctx->getParent();
769 }
770
771 std::string TemplateParams;
772 llvm::raw_string_ostream TOut(TemplateParams);
773 for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
28
Loop condition is false. Execution continues on line 789
774 I != E; ++I) {
21
Calling 'operator!=<const clang::ClassTemplateSpecializationDecl **>'
27
Returning from 'operator!=<const clang::ClassTemplateSpecializationDecl **>'
775 const TemplateParameterList *Params
776 = (*I)->getSpecializedTemplate()->getTemplateParameters();
777 const TemplateArgumentList &Args = (*I)->getTemplateArgs();
778 assert(Params->size() == Args.size())((Params->size() == Args.size()) ? static_cast<void>
(0) : __assert_fail ("Params->size() == Args.size()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 778, __PRETTY_FUNCTION__))
;
779 for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
780 StringRef Param = Params->getParam(i)->getName();
781 if (Param.empty()) continue;
782 TOut << Param << " = ";
783 Args.get(i).print(Policy, TOut);
784 TOut << ", ";
785 }
786 }
787
788 FunctionTemplateSpecializationInfo *FSI
789 = FD->getTemplateSpecializationInfo();
790 if (FSI && !FSI->isExplicitSpecialization()) {
29
Assuming 'FSI' is null
791 const TemplateParameterList* Params
792 = FSI->getTemplate()->getTemplateParameters();
793 const TemplateArgumentList* Args = FSI->TemplateArguments;
794 assert(Params->size() == Args->size())((Params->size() == Args->size()) ? static_cast<void
> (0) : __assert_fail ("Params->size() == Args->size()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 794, __PRETTY_FUNCTION__))
;
795 for (unsigned i = 0, e = Params->size(); i != e; ++i) {
796 StringRef Param = Params->getParam(i)->getName();
797 if (Param.empty()) continue;
798 TOut << Param << " = ";
799 Args->get(i).print(Policy, TOut);
800 TOut << ", ";
801 }
802 }
803
804 TOut.flush();
805 if (!TemplateParams.empty()) {
30
Assuming the condition is false
31
Taking false branch
806 // remove the trailing comma and space
807 TemplateParams.resize(TemplateParams.size() - 2);
808 POut << " [" << TemplateParams << "]";
809 }
810
811 POut.flush();
812
813 // Print "auto" for all deduced return types. This includes C++1y return
814 // type deduction and lambdas. For trailing return types resolve the
815 // decltype expression. Otherwise print the real type when this is
816 // not a constructor or destructor.
817 if (isa<CXXMethodDecl>(FD) &&
32
Assuming 'FD' is not a 'CXXMethodDecl'
818 cast<CXXMethodDecl>(FD)->getParent()->isLambda())
819 Proto = "auto " + Proto;
820 else if (FT
32.1
'FT' is null
32.1
'FT' is null
&& FT->getReturnType()->getAs<DecltypeType>())
33
Taking false branch
821 FT->getReturnType()
822 ->getAs<DecltypeType>()
823 ->getUnderlyingType()
824 .getAsStringInternal(Proto, Policy);
825 else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
34
Assuming 'FD' is not a 'CXXConstructorDecl'
35
Assuming 'FD' is not a 'CXXDestructorDecl'
36
Taking true branch
826 AFT->getReturnType().getAsStringInternal(Proto, Policy);
37
Called C++ object pointer is null
827
828 Out << Proto;
829
830 return std::string(Name);
831 }
832 if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
833 for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
834 // Skip to its enclosing function or method, but not its enclosing
835 // CapturedDecl.
836 if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
837 const Decl *D = Decl::castFromDeclContext(DC);
838 return ComputeName(IK, D);
839 }
840 llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 840)
;
841 }
842 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
843 SmallString<256> Name;
844 llvm::raw_svector_ostream Out(Name);
845 Out << (MD->isInstanceMethod() ? '-' : '+');
846 Out << '[';
847
848 // For incorrect code, there might not be an ObjCInterfaceDecl. Do
849 // a null check to avoid a crash.
850 if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
851 Out << *ID;
852
853 if (const ObjCCategoryImplDecl *CID =
854 dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
855 Out << '(' << *CID << ')';
856
857 Out << ' ';
858 MD->getSelector().print(Out);
859 Out << ']';
860
861 return std::string(Name);
862 }
863 if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) {
864 // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
865 return "top level";
866 }
867 return "";
868}
869
870void APNumericStorage::setIntValue(const ASTContext &C,
871 const llvm::APInt &Val) {
872 if (hasAllocation())
873 C.Deallocate(pVal);
874
875 BitWidth = Val.getBitWidth();
876 unsigned NumWords = Val.getNumWords();
877 const uint64_t* Words = Val.getRawData();
878 if (NumWords > 1) {
879 pVal = new (C) uint64_t[NumWords];
880 std::copy(Words, Words + NumWords, pVal);
881 } else if (NumWords == 1)
882 VAL = Words[0];
883 else
884 VAL = 0;
885}
886
887IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
888 QualType type, SourceLocation l)
889 : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
890 false, false),
891 Loc(l) {
892 assert(type->isIntegerType() && "Illegal type in IntegerLiteral")((type->isIntegerType() && "Illegal type in IntegerLiteral"
) ? static_cast<void> (0) : __assert_fail ("type->isIntegerType() && \"Illegal type in IntegerLiteral\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 892, __PRETTY_FUNCTION__))
;
893 assert(V.getBitWidth() == C.getIntWidth(type) &&((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 894, __PRETTY_FUNCTION__))
894 "Integer type is not the correct size for constant.")((V.getBitWidth() == C.getIntWidth(type) && "Integer type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 894, __PRETTY_FUNCTION__))
;
895 setValue(C, V);
896}
897
898IntegerLiteral *
899IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
900 QualType type, SourceLocation l) {
901 return new (C) IntegerLiteral(C, V, type, l);
902}
903
904IntegerLiteral *
905IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
906 return new (C) IntegerLiteral(Empty);
907}
908
909FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
910 QualType type, SourceLocation l,
911 unsigned Scale)
912 : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
913 false, false),
914 Loc(l), Scale(Scale) {
915 assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral")((type->isFixedPointType() && "Illegal type in FixedPointLiteral"
) ? static_cast<void> (0) : __assert_fail ("type->isFixedPointType() && \"Illegal type in FixedPointLiteral\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 915, __PRETTY_FUNCTION__))
;
916 assert(V.getBitWidth() == C.getTypeInfo(type).Width &&((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 917, __PRETTY_FUNCTION__))
917 "Fixed point type is not the correct size for constant.")((V.getBitWidth() == C.getTypeInfo(type).Width && "Fixed point type is not the correct size for constant."
) ? static_cast<void> (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 917, __PRETTY_FUNCTION__))
;
918 setValue(C, V);
919}
920
921FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
922 const llvm::APInt &V,
923 QualType type,
924 SourceLocation l,
925 unsigned Scale) {
926 return new (C) FixedPointLiteral(C, V, type, l, Scale);
927}
928
929std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
930 // Currently the longest decimal number that can be printed is the max for an
931 // unsigned long _Accum: 4294967295.99999999976716935634613037109375
932 // which is 43 characters.
933 SmallString<64> S;
934 FixedPointValueToString(
935 S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
936 return std::string(S.str());
937}
938
939FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
940 bool isexact, QualType Type, SourceLocation L)
941 : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
942 false, false), Loc(L) {
943 setSemantics(V.getSemantics());
944 FloatingLiteralBits.IsExact = isexact;
945 setValue(C, V);
946}
947
948FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
949 : Expr(FloatingLiteralClass, Empty) {
950 setRawSemantics(llvm::APFloatBase::S_IEEEhalf);
951 FloatingLiteralBits.IsExact = false;
952}
953
954FloatingLiteral *
955FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
956 bool isexact, QualType Type, SourceLocation L) {
957 return new (C) FloatingLiteral(C, V, isexact, Type, L);
958}
959
960FloatingLiteral *
961FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
962 return new (C) FloatingLiteral(C, Empty);
963}
964
965/// getValueAsApproximateDouble - This returns the value as an inaccurate
966/// double. Note that this may cause loss of precision, but is useful for
967/// debugging dumps, etc.
968double FloatingLiteral::getValueAsApproximateDouble() const {
969 llvm::APFloat V = getValue();
970 bool ignored;
971 V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
972 &ignored);
973 return V.convertToDouble();
974}
975
976unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target,
977 StringKind SK) {
978 unsigned CharByteWidth = 0;
979 switch (SK) {
980 case Ascii:
981 case UTF8:
982 CharByteWidth = Target.getCharWidth();
983 break;
984 case Wide:
985 CharByteWidth = Target.getWCharWidth();
986 break;
987 case UTF16:
988 CharByteWidth = Target.getChar16Width();
989 break;
990 case UTF32:
991 CharByteWidth = Target.getChar32Width();
992 break;
993 }
994 assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple")(((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth & 7) == 0 && \"Assumes character size is byte multiple\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 994, __PRETTY_FUNCTION__))
;
995 CharByteWidth /= 8;
996 assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) &&(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth ==
4) && "The only supported character byte widths are 1,2 and 4!"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 997, __PRETTY_FUNCTION__))
997 "The only supported character byte widths are 1,2 and 4!")(((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth ==
4) && "The only supported character byte widths are 1,2 and 4!"
) ? static_cast<void> (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 997, __PRETTY_FUNCTION__))
;
998 return CharByteWidth;
999}
1000
1001StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str,
1002 StringKind Kind, bool Pascal, QualType Ty,
1003 const SourceLocation *Loc,
1004 unsigned NumConcatenated)
1005 : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary, false, false, false,
1006 false) {
1007 assert(Ctx.getAsConstantArrayType(Ty) &&((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!"
) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1008, __PRETTY_FUNCTION__))
1008 "StringLiteral must be of constant array type!")((Ctx.getAsConstantArrayType(Ty) && "StringLiteral must be of constant array type!"
) ? static_cast<void> (0) : __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1008, __PRETTY_FUNCTION__))
;
1009 unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind);
1010 unsigned ByteLength = Str.size();
1011 assert((ByteLength % CharByteWidth == 0) &&(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!"
) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1012, __PRETTY_FUNCTION__))
1012 "The size of the data must be a multiple of CharByteWidth!")(((ByteLength % CharByteWidth == 0) && "The size of the data must be a multiple of CharByteWidth!"
) ? static_cast<void> (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1012, __PRETTY_FUNCTION__))
;
1013
1014 // Avoid the expensive division. The compiler should be able to figure it
1015 // out by itself. However as of clang 7, even with the appropriate
1016 // llvm_unreachable added just here, it is not able to do so.
1017 unsigned Length;
1018 switch (CharByteWidth) {
1019 case 1:
1020 Length = ByteLength;
1021 break;
1022 case 2:
1023 Length = ByteLength / 2;
1024 break;
1025 case 4:
1026 Length = ByteLength / 4;
1027 break;
1028 default:
1029 llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1029)
;
1030 }
1031
1032 StringLiteralBits.Kind = Kind;
1033 StringLiteralBits.CharByteWidth = CharByteWidth;
1034 StringLiteralBits.IsPascal = Pascal;
1035 StringLiteralBits.NumConcatenated = NumConcatenated;
1036 *getTrailingObjects<unsigned>() = Length;
1037
1038 // Initialize the trailing array of SourceLocation.
1039 // This is safe since SourceLocation is POD-like.
1040 std::memcpy(getTrailingObjects<SourceLocation>(), Loc,
1041 NumConcatenated * sizeof(SourceLocation));
1042
1043 // Initialize the trailing array of char holding the string data.
1044 std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength);
1045}
1046
1047StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated,
1048 unsigned Length, unsigned CharByteWidth)
1049 : Expr(StringLiteralClass, Empty) {
1050 StringLiteralBits.CharByteWidth = CharByteWidth;
1051 StringLiteralBits.NumConcatenated = NumConcatenated;
1052 *getTrailingObjects<unsigned>() = Length;
1053}
1054
1055StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str,
1056 StringKind Kind, bool Pascal, QualType Ty,
1057 const SourceLocation *Loc,
1058 unsigned NumConcatenated) {
1059 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
1060 1, NumConcatenated, Str.size()),
1061 alignof(StringLiteral));
1062 return new (Mem)
1063 StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated);
1064}
1065
1066StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx,
1067 unsigned NumConcatenated,
1068 unsigned Length,
1069 unsigned CharByteWidth) {
1070 void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
1071 1, NumConcatenated, Length * CharByteWidth),
1072 alignof(StringLiteral));
1073 return new (Mem)
1074 StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth);
1075}
1076
1077void StringLiteral::outputString(raw_ostream &OS) const {
1078 switch (getKind()) {
1079 case Ascii: break; // no prefix.
1080 case Wide: OS << 'L'; break;
1081 case UTF8: OS << "u8"; break;
1082 case UTF16: OS << 'u'; break;
1083 case UTF32: OS << 'U'; break;
1084 }
1085 OS << '"';
1086 static const char Hex[] = "0123456789ABCDEF";
1087
1088 unsigned LastSlashX = getLength();
1089 for (unsigned I = 0, N = getLength(); I != N; ++I) {
1090 switch (uint32_t Char = getCodeUnit(I)) {
1091 default:
1092 // FIXME: Convert UTF-8 back to codepoints before rendering.
1093
1094 // Convert UTF-16 surrogate pairs back to codepoints before rendering.
1095 // Leave invalid surrogates alone; we'll use \x for those.
1096 if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
1097 Char <= 0xdbff) {
1098 uint32_t Trail = getCodeUnit(I + 1);
1099 if (Trail >= 0xdc00 && Trail <= 0xdfff) {
1100 Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
1101 ++I;
1102 }
1103 }
1104
1105 if (Char > 0xff) {
1106 // If this is a wide string, output characters over 0xff using \x
1107 // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
1108 // codepoint: use \x escapes for invalid codepoints.
1109 if (getKind() == Wide ||
1110 (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
1111 // FIXME: Is this the best way to print wchar_t?
1112 OS << "\\x";
1113 int Shift = 28;
1114 while ((Char >> Shift) == 0)
1115 Shift -= 4;
1116 for (/**/; Shift >= 0; Shift -= 4)
1117 OS << Hex[(Char >> Shift) & 15];
1118 LastSlashX = I;
1119 break;
1120 }
1121
1122 if (Char > 0xffff)
1123 OS << "\\U00"
1124 << Hex[(Char >> 20) & 15]
1125 << Hex[(Char >> 16) & 15];
1126 else
1127 OS << "\\u";
1128 OS << Hex[(Char >> 12) & 15]
1129 << Hex[(Char >> 8) & 15]
1130 << Hex[(Char >> 4) & 15]
1131 << Hex[(Char >> 0) & 15];
1132 break;
1133 }
1134
1135 // If we used \x... for the previous character, and this character is a
1136 // hexadecimal digit, prevent it being slurped as part of the \x.
1137 if (LastSlashX + 1 == I) {
1138 switch (Char) {
1139 case '0': case '1': case '2': case '3': case '4':
1140 case '5': case '6': case '7': case '8': case '9':
1141 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
1142 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
1143 OS << "\"\"";
1144 }
1145 }
1146
1147 assert(Char <= 0xff &&((Char <= 0xff && "Characters above 0xff should already have been handled."
) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1148, __PRETTY_FUNCTION__))
1148 "Characters above 0xff should already have been handled.")((Char <= 0xff && "Characters above 0xff should already have been handled."
) ? static_cast<void> (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1148, __PRETTY_FUNCTION__))
;
1149
1150 if (isPrintable(Char))
1151 OS << (char)Char;
1152 else // Output anything hard as an octal escape.
1153 OS << '\\'
1154 << (char)('0' + ((Char >> 6) & 7))
1155 << (char)('0' + ((Char >> 3) & 7))
1156 << (char)('0' + ((Char >> 0) & 7));
1157 break;
1158 // Handle some common non-printable cases to make dumps prettier.
1159 case '\\': OS << "\\\\"; break;
1160 case '"': OS << "\\\""; break;
1161 case '\a': OS << "\\a"; break;
1162 case '\b': OS << "\\b"; break;
1163 case '\f': OS << "\\f"; break;
1164 case '\n': OS << "\\n"; break;
1165 case '\r': OS << "\\r"; break;
1166 case '\t': OS << "\\t"; break;
1167 case '\v': OS << "\\v"; break;
1168 }
1169 }
1170 OS << '"';
1171}
1172
1173/// getLocationOfByte - Return a source location that points to the specified
1174/// byte of this string literal.
1175///
1176/// Strings are amazingly complex. They can be formed from multiple tokens and
1177/// can have escape sequences in them in addition to the usual trigraph and
1178/// escaped newline business. This routine handles this complexity.
1179///
1180/// The *StartToken sets the first token to be searched in this function and
1181/// the *StartTokenByteOffset is the byte offset of the first token. Before
1182/// returning, it updates the *StartToken to the TokNo of the token being found
1183/// and sets *StartTokenByteOffset to the byte offset of the token in the
1184/// string.
1185/// Using these two parameters can reduce the time complexity from O(n^2) to
1186/// O(n) if one wants to get the location of byte for all the tokens in a
1187/// string.
1188///
1189SourceLocation
1190StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
1191 const LangOptions &Features,
1192 const TargetInfo &Target, unsigned *StartToken,
1193 unsigned *StartTokenByteOffset) const {
1194 assert((getKind() == StringLiteral::Ascii ||(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1196, __PRETTY_FUNCTION__))
1195 getKind() == StringLiteral::UTF8) &&(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1196, __PRETTY_FUNCTION__))
1196 "Only narrow string literals are currently supported")(((getKind() == StringLiteral::Ascii || getKind() == StringLiteral
::UTF8) && "Only narrow string literals are currently supported"
) ? static_cast<void> (0) : __assert_fail ("(getKind() == StringLiteral::Ascii || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1196, __PRETTY_FUNCTION__))
;
1197
1198 // Loop over all of the tokens in this string until we find the one that
1199 // contains the byte we're looking for.
1200 unsigned TokNo = 0;
1201 unsigned StringOffset = 0;
1202 if (StartToken)
1203 TokNo = *StartToken;
1204 if (StartTokenByteOffset) {
1205 StringOffset = *StartTokenByteOffset;
1206 ByteNo -= StringOffset;
1207 }
1208 while (1) {
1209 assert(TokNo < getNumConcatenated() && "Invalid byte number!")((TokNo < getNumConcatenated() && "Invalid byte number!"
) ? static_cast<void> (0) : __assert_fail ("TokNo < getNumConcatenated() && \"Invalid byte number!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1209, __PRETTY_FUNCTION__))
;
1210 SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
1211
1212 // Get the spelling of the string so that we can get the data that makes up
1213 // the string literal, not the identifier for the macro it is potentially
1214 // expanded through.
1215 SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
1216
1217 // Re-lex the token to get its length and original spelling.
1218 std::pair<FileID, unsigned> LocInfo =
1219 SM.getDecomposedLoc(StrTokSpellingLoc);
1220 bool Invalid = false;
1221 StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
1222 if (Invalid) {
1223 if (StartTokenByteOffset != nullptr)
1224 *StartTokenByteOffset = StringOffset;
1225 if (StartToken != nullptr)
1226 *StartToken = TokNo;
1227 return StrTokSpellingLoc;
1228 }
1229
1230 const char *StrData = Buffer.data()+LocInfo.second;
1231
1232 // Create a lexer starting at the beginning of this token.
1233 Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
1234 Buffer.begin(), StrData, Buffer.end());
1235 Token TheTok;
1236 TheLexer.LexFromRawLexer(TheTok);
1237
1238 // Use the StringLiteralParser to compute the length of the string in bytes.
1239 StringLiteralParser SLP(TheTok, SM, Features, Target);
1240 unsigned TokNumBytes = SLP.GetStringLength();
1241
1242 // If the byte is in this token, return the location of the byte.
1243 if (ByteNo < TokNumBytes ||
1244 (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
1245 unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
1246
1247 // Now that we know the offset of the token in the spelling, use the
1248 // preprocessor to get the offset in the original source.
1249 if (StartTokenByteOffset != nullptr)
1250 *StartTokenByteOffset = StringOffset;
1251 if (StartToken != nullptr)
1252 *StartToken = TokNo;
1253 return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
1254 }
1255
1256 // Move to the next string token.
1257 StringOffset += TokNumBytes;
1258 ++TokNo;
1259 ByteNo -= TokNumBytes;
1260 }
1261}
1262
1263/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1264/// corresponds to, e.g. "sizeof" or "[pre]++".
1265StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
1266 switch (Op) {
1267#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1268#include "clang/AST/OperationKinds.def"
1269 }
1270 llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1270)
;
1271}
1272
1273UnaryOperatorKind
1274UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
1275 switch (OO) {
1276 default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1276)
;
1277 case OO_PlusPlus: return Postfix ? UO_PostInc : UO_PreInc;
1278 case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
1279 case OO_Amp: return UO_AddrOf;
1280 case OO_Star: return UO_Deref;
1281 case OO_Plus: return UO_Plus;
1282 case OO_Minus: return UO_Minus;
1283 case OO_Tilde: return UO_Not;
1284 case OO_Exclaim: return UO_LNot;
1285 case OO_Coawait: return UO_Coawait;
1286 }
1287}
1288
1289OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
1290 switch (Opc) {
1291 case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
1292 case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
1293 case UO_AddrOf: return OO_Amp;
1294 case UO_Deref: return OO_Star;
1295 case UO_Plus: return OO_Plus;
1296 case UO_Minus: return OO_Minus;
1297 case UO_Not: return OO_Tilde;
1298 case UO_LNot: return OO_Exclaim;
1299 case UO_Coawait: return OO_Coawait;
1300 default: return OO_None;
1301 }
1302}
1303
1304
1305//===----------------------------------------------------------------------===//
1306// Postfix Operators.
1307//===----------------------------------------------------------------------===//
1308
1309CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs,
1310 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1311 SourceLocation RParenLoc, unsigned MinNumArgs,
1312 ADLCallKind UsesADL)
1313 : Expr(SC, Ty, VK, OK_Ordinary, Fn->isTypeDependent(),
1314 Fn->isValueDependent(), Fn->isInstantiationDependent(),
1315 Fn->containsUnexpandedParameterPack()),
1316 RParenLoc(RParenLoc) {
1317 NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1318 unsigned NumPreArgs = PreArgs.size();
1319 CallExprBits.NumPreArgs = NumPreArgs;
1320 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1320, __PRETTY_FUNCTION__))
;
1321
1322 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1323 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1324 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1325, __PRETTY_FUNCTION__))
1325 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1325, __PRETTY_FUNCTION__))
;
1326
1327 CallExprBits.UsesADL = static_cast<bool>(UsesADL);
1328
1329 setCallee(Fn);
1330 for (unsigned I = 0; I != NumPreArgs; ++I) {
1331 addDependence(PreArgs[I]->getDependence());
1332 setPreArg(I, PreArgs[I]);
1333 }
1334 for (unsigned I = 0; I != Args.size(); ++I) {
1335 addDependence(Args[I]->getDependence());
1336 setArg(I, Args[I]);
1337 }
1338 for (unsigned I = Args.size(); I != NumArgs; ++I) {
1339 setArg(I, nullptr);
1340 }
1341}
1342
1343CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs,
1344 EmptyShell Empty)
1345 : Expr(SC, Empty), NumArgs(NumArgs) {
1346 CallExprBits.NumPreArgs = NumPreArgs;
1347 assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!"
) ? static_cast<void> (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1347, __PRETTY_FUNCTION__))
;
1348
1349 unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
1350 CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
1351 assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1352, __PRETTY_FUNCTION__))
1352 "OffsetToTrailingObjects overflow!")(((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects
) && "OffsetToTrailingObjects overflow!") ? static_cast
<void> (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1352, __PRETTY_FUNCTION__))
;
1353}
1354
1355CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn,
1356 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
1357 SourceLocation RParenLoc, unsigned MinNumArgs,
1358 ADLCallKind UsesADL) {
1359 unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
1360 unsigned SizeOfTrailingObjects =
1361 CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
1362 void *Mem =
1363 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1364 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK,
1365 RParenLoc, MinNumArgs, UsesADL);
1366}
1367
1368CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
1369 ExprValueKind VK, SourceLocation RParenLoc,
1370 ADLCallKind UsesADL) {
1371 assert(!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) &&((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr
)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1372, __PRETTY_FUNCTION__))
1372 "Misaligned memory in CallExpr::CreateTemporary!")((!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr
)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? static_cast<void> (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1372, __PRETTY_FUNCTION__))
;
1373 return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty,
1374 VK, RParenLoc, /*MinNumArgs=*/0, UsesADL);
1375}
1376
1377CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs,
1378 EmptyShell Empty) {
1379 unsigned SizeOfTrailingObjects =
1380 CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
1381 void *Mem =
1382 Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
1383 return new (Mem) CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, Empty);
1384}
1385
1386unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) {
1387 switch (SC) {
1388 case CallExprClass:
1389 return sizeof(CallExpr);
1390 case CXXOperatorCallExprClass:
1391 return sizeof(CXXOperatorCallExpr);
1392 case CXXMemberCallExprClass:
1393 return sizeof(CXXMemberCallExpr);
1394 case UserDefinedLiteralClass:
1395 return sizeof(UserDefinedLiteral);
1396 case CUDAKernelCallExprClass:
1397 return sizeof(CUDAKernelCallExpr);
1398 default:
1399 llvm_unreachable("unexpected class deriving from CallExpr!")::llvm::llvm_unreachable_internal("unexpected class deriving from CallExpr!"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1399)
;
1400 }
1401}
1402
1403Decl *Expr::getReferencedDeclOfCallee() {
1404 Expr *CEE = IgnoreParenImpCasts();
1405
1406 while (SubstNonTypeTemplateParmExpr *NTTP =
1407 dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
1408 CEE = NTTP->getReplacement()->IgnoreParenImpCasts();
1409 }
1410
1411 // If we're calling a dereference, look at the pointer instead.
1412 while (true) {
1413 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
1414 if (BO->isPtrMemOp()) {
1415 CEE = BO->getRHS()->IgnoreParenImpCasts();
1416 continue;
1417 }
1418 } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
1419 if (UO->getOpcode() == UO_Deref || UO->getOpcode() == UO_AddrOf ||
1420 UO->getOpcode() == UO_Plus) {
1421 CEE = UO->getSubExpr()->IgnoreParenImpCasts();
1422 continue;
1423 }
1424 }
1425 break;
1426 }
1427
1428 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
1429 return DRE->getDecl();
1430 if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
1431 return ME->getMemberDecl();
1432 if (auto *BE = dyn_cast<BlockExpr>(CEE))
1433 return BE->getBlockDecl();
1434
1435 return nullptr;
1436}
1437
1438/// If this is a call to a builtin, return the builtin ID. If not, return 0.
1439unsigned CallExpr::getBuiltinCallee() const {
1440 auto *FDecl =
1441 dyn_cast_or_null<FunctionDecl>(getCallee()->getReferencedDeclOfCallee());
1442 return FDecl ? FDecl->getBuiltinID() : 0;
1443}
1444
1445bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
1446 if (unsigned BI = getBuiltinCallee())
1447 return Ctx.BuiltinInfo.isUnevaluated(BI);
1448 return false;
1449}
1450
1451QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
1452 const Expr *Callee = getCallee();
1453 QualType CalleeType = Callee->getType();
1454 if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
1455 CalleeType = FnTypePtr->getPointeeType();
1456 } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
1457 CalleeType = BPT->getPointeeType();
1458 } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
1459 if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
1460 return Ctx.VoidTy;
1461
1462 // This should never be overloaded and so should never return null.
1463 CalleeType = Expr::findBoundMemberType(Callee);
1464 }
1465
1466 const FunctionType *FnType = CalleeType->castAs<FunctionType>();
1467 return FnType->getReturnType();
1468}
1469
1470const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const {
1471 // If the return type is a struct, union, or enum that is marked nodiscard,
1472 // then return the return type attribute.
1473 if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl())
1474 if (const auto *A = TD->getAttr<WarnUnusedResultAttr>())
1475 return A;
1476
1477 // Otherwise, see if the callee is marked nodiscard and return that attribute
1478 // instead.
1479 const Decl *D = getCalleeDecl();
1480 return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr;
1481}
1482
1483SourceLocation CallExpr::getBeginLoc() const {
1484 if (isa<CXXOperatorCallExpr>(this))
1485 return cast<CXXOperatorCallExpr>(this)->getBeginLoc();
1486
1487 SourceLocation begin = getCallee()->getBeginLoc();
1488 if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
1489 begin = getArg(0)->getBeginLoc();
1490 return begin;
1491}
1492SourceLocation CallExpr::getEndLoc() const {
1493 if (isa<CXXOperatorCallExpr>(this))
1494 return cast<CXXOperatorCallExpr>(this)->getEndLoc();
1495
1496 SourceLocation end = getRParenLoc();
1497 if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
1498 end = getArg(getNumArgs() - 1)->getEndLoc();
1499 return end;
1500}
1501
1502OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
1503 SourceLocation OperatorLoc,
1504 TypeSourceInfo *tsi,
1505 ArrayRef<OffsetOfNode> comps,
1506 ArrayRef<Expr*> exprs,
1507 SourceLocation RParenLoc) {
1508 void *Mem = C.Allocate(
1509 totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
1510
1511 return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
1512 RParenLoc);
1513}
1514
1515OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
1516 unsigned numComps, unsigned numExprs) {
1517 void *Mem =
1518 C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
1519 return new (Mem) OffsetOfExpr(numComps, numExprs);
1520}
1521
1522OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
1523 SourceLocation OperatorLoc, TypeSourceInfo *tsi,
1524 ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
1525 SourceLocation RParenLoc)
1526 : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
1527 /*TypeDependent=*/false,
1528 /*ValueDependent=*/tsi->getType()->isDependentType(),
1529 tsi->getType()->isInstantiationDependentType(),
1530 tsi->getType()->containsUnexpandedParameterPack()),
1531 OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
1532 NumComps(comps.size()), NumExprs(exprs.size())
1533{
1534 for (unsigned i = 0; i != comps.size(); ++i) {
1535 setComponent(i, comps[i]);
1536 }
1537
1538 for (unsigned i = 0; i != exprs.size(); ++i) {
1539 if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
1540 addDependence(ExprDependence::Value);
1541 if (exprs[i]->containsUnexpandedParameterPack())
1542 addDependence(ExprDependence ::UnexpandedPack);
1543
1544 setIndexExpr(i, exprs[i]);
1545 }
1546}
1547
1548IdentifierInfo *OffsetOfNode::getFieldName() const {
1549 assert(getKind() == Field || getKind() == Identifier)((getKind() == Field || getKind() == Identifier) ? static_cast
<void> (0) : __assert_fail ("getKind() == Field || getKind() == Identifier"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1549, __PRETTY_FUNCTION__))
;
1550 if (getKind() == Field)
1551 return getField()->getIdentifier();
1552
1553 return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1554}
1555
1556UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
1557 UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
1558 SourceLocation op, SourceLocation rp)
1559 : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
1560 false, // Never type-dependent (C++ [temp.dep.expr]p3).
1561 // Value-dependent if the argument is type-dependent.
1562 E->isTypeDependent(), E->isInstantiationDependent(),
1563 E->containsUnexpandedParameterPack()),
1564 OpLoc(op), RParenLoc(rp) {
1565 UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
1566 UnaryExprOrTypeTraitExprBits.IsType = false;
1567 Argument.Ex = E;
1568
1569 // Check to see if we are in the situation where alignof(decl) should be
1570 // dependent because decl's alignment is dependent.
1571 if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) {
1572 if (!isValueDependent() || !isInstantiationDependent()) {
1573 E = E->IgnoreParens();
1574
1575 const ValueDecl *D = nullptr;
1576 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
1577 D = DRE->getDecl();
1578 else if (const auto *ME = dyn_cast<MemberExpr>(E))
1579 D = ME->getMemberDecl();
1580
1581 if (D) {
1582 for (const auto *I : D->specific_attrs<AlignedAttr>()) {
1583 if (I->isAlignmentDependent()) {
1584 addDependence(ExprDependence::ValueInstantiation);
1585 break;
1586 }
1587 }
1588 }
1589 }
1590 }
1591}
1592
1593MemberExpr::MemberExpr(Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
1594 ValueDecl *MemberDecl,
1595 const DeclarationNameInfo &NameInfo, QualType T,
1596 ExprValueKind VK, ExprObjectKind OK,
1597 NonOdrUseReason NOUR)
1598 : Expr(MemberExprClass, T, VK, OK, Base->isTypeDependent(),
1599 Base->isValueDependent(), Base->isInstantiationDependent(),
1600 Base->containsUnexpandedParameterPack()),
1601 Base(Base), MemberDecl(MemberDecl), MemberDNLoc(NameInfo.getInfo()),
1602 MemberLoc(NameInfo.getLoc()) {
1603 assert(!NameInfo.getName() ||((!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo
.getName()) ? static_cast<void> (0) : __assert_fail ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1604, __PRETTY_FUNCTION__))
1604 MemberDecl->getDeclName() == NameInfo.getName())((!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo
.getName()) ? static_cast<void> (0) : __assert_fail ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1604, __PRETTY_FUNCTION__))
;
1605 MemberExprBits.IsArrow = IsArrow;
1606 MemberExprBits.HasQualifierOrFoundDecl = false;
1607 MemberExprBits.HasTemplateKWAndArgsInfo = false;
1608 MemberExprBits.HadMultipleCandidates = false;
1609 MemberExprBits.NonOdrUseReason = NOUR;
1610 MemberExprBits.OperatorLoc = OperatorLoc;
1611}
1612
1613MemberExpr *MemberExpr::Create(
1614 const ASTContext &C, Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
1615 NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
1616 ValueDecl *MemberDecl, DeclAccessPair FoundDecl,
1617 DeclarationNameInfo NameInfo, const TemplateArgumentListInfo *TemplateArgs,
1618 QualType T, ExprValueKind VK, ExprObjectKind OK, NonOdrUseReason NOUR) {
1619 bool HasQualOrFound = QualifierLoc || FoundDecl.getDecl() != MemberDecl ||
1620 FoundDecl.getAccess() != MemberDecl->getAccess();
1621 bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
1622 std::size_t Size =
1623 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1624 TemplateArgumentLoc>(
1625 HasQualOrFound ? 1 : 0, HasTemplateKWAndArgsInfo ? 1 : 0,
1626 TemplateArgs ? TemplateArgs->size() : 0);
1627
1628 void *Mem = C.Allocate(Size, alignof(MemberExpr));
1629 MemberExpr *E = new (Mem) MemberExpr(Base, IsArrow, OperatorLoc, MemberDecl,
1630 NameInfo, T, VK, OK, NOUR);
1631
1632 if (isa<FieldDecl>(MemberDecl)) {
1633 DeclContext *DC = MemberDecl->getDeclContext();
1634 // dyn_cast_or_null is used to handle objC variables which do not
1635 // have a declaration context.
1636 CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC);
1637 if (RD && RD->isDependentContext() && RD->isCurrentInstantiation(DC)) {
1638 if (E->isTypeDependent() && !T->isDependentType())
1639 E->removeDependence(ExprDependence::Type);
1640 }
1641 // Bitfield with value-dependent width is type-dependent.
1642 FieldDecl *FD = dyn_cast<FieldDecl>(MemberDecl);
1643 if (FD && FD->isBitField() && FD->getBitWidth()->isValueDependent())
1644 E->addDependence(ExprDependence::Type);
1645 }
1646
1647 if (HasQualOrFound) {
1648 // FIXME: Wrong. We should be looking at the member declaration we found.
1649 if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent())
1650 E->addDependence(ExprDependence::TypeValueInstantiation);
1651 else if (QualifierLoc &&
1652 QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
1653 E->addDependence(ExprDependence::Instantiation);
1654
1655 E->MemberExprBits.HasQualifierOrFoundDecl = true;
1656
1657 MemberExprNameQualifier *NQ =
1658 E->getTrailingObjects<MemberExprNameQualifier>();
1659 NQ->QualifierLoc = QualifierLoc;
1660 NQ->FoundDecl = FoundDecl;
1661 }
1662
1663 E->MemberExprBits.HasTemplateKWAndArgsInfo =
1664 TemplateArgs || TemplateKWLoc.isValid();
1665
1666 if (TemplateArgs) {
1667 auto Deps = TemplateArgumentDependence::None;
1668 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1669 TemplateKWLoc, *TemplateArgs,
1670 E->getTrailingObjects<TemplateArgumentLoc>(), Deps);
1671 if (Deps & TemplateArgumentDependence::Instantiation)
1672 E->addDependence(ExprDependence::Instantiation);
1673 } else if (TemplateKWLoc.isValid()) {
1674 E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
1675 TemplateKWLoc);
1676 }
1677
1678 return E;
1679}
1680
1681MemberExpr *MemberExpr::CreateEmpty(const ASTContext &Context,
1682 bool HasQualifier, bool HasFoundDecl,
1683 bool HasTemplateKWAndArgsInfo,
1684 unsigned NumTemplateArgs) {
1685 assert((!NumTemplateArgs || HasTemplateKWAndArgsInfo) &&(((!NumTemplateArgs || HasTemplateKWAndArgsInfo) && "template args but no template arg info?"
) ? static_cast<void> (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1686, __PRETTY_FUNCTION__))
1686 "template args but no template arg info?")(((!NumTemplateArgs || HasTemplateKWAndArgsInfo) && "template args but no template arg info?"
) ? static_cast<void> (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1686, __PRETTY_FUNCTION__))
;
1687 bool HasQualOrFound = HasQualifier || HasFoundDecl;
1688 std::size_t Size =
1689 totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
1690 TemplateArgumentLoc>(HasQualOrFound ? 1 : 0,
1691 HasTemplateKWAndArgsInfo ? 1 : 0,
1692 NumTemplateArgs);
1693 void *Mem = Context.Allocate(Size, alignof(MemberExpr));
1694 return new (Mem) MemberExpr(EmptyShell());
1695}
1696
1697SourceLocation MemberExpr::getBeginLoc() const {
1698 if (isImplicitAccess()) {
1699 if (hasQualifier())
1700 return getQualifierLoc().getBeginLoc();
1701 return MemberLoc;
1702 }
1703
1704 // FIXME: We don't want this to happen. Rather, we should be able to
1705 // detect all kinds of implicit accesses more cleanly.
1706 SourceLocation BaseStartLoc = getBase()->getBeginLoc();
1707 if (BaseStartLoc.isValid())
1708 return BaseStartLoc;
1709 return MemberLoc;
1710}
1711SourceLocation MemberExpr::getEndLoc() const {
1712 SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
1713 if (hasExplicitTemplateArgs())
1714 EndLoc = getRAngleLoc();
1715 else if (EndLoc.isInvalid())
1716 EndLoc = getBase()->getEndLoc();
1717 return EndLoc;
1718}
1719
1720bool CastExpr::CastConsistency() const {
1721 switch (getCastKind()) {
1722 case CK_DerivedToBase:
1723 case CK_UncheckedDerivedToBase:
1724 case CK_DerivedToBaseMemberPointer:
1725 case CK_BaseToDerived:
1726 case CK_BaseToDerivedMemberPointer:
1727 assert(!path_empty() && "Cast kind should have a base path!")((!path_empty() && "Cast kind should have a base path!"
) ? static_cast<void> (0) : __assert_fail ("!path_empty() && \"Cast kind should have a base path!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1727, __PRETTY_FUNCTION__))
;
1728 break;
1729
1730 case CK_CPointerToObjCPointerCast:
1731 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1731, __PRETTY_FUNCTION__))
;
1732 assert(getSubExpr()->getType()->isPointerType())((getSubExpr()->getType()->isPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1732, __PRETTY_FUNCTION__))
;
1733 goto CheckNoBasePath;
1734
1735 case CK_BlockPointerToObjCPointerCast:
1736 assert(getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1736, __PRETTY_FUNCTION__))
;
1737 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1737, __PRETTY_FUNCTION__))
;
1738 goto CheckNoBasePath;
1739
1740 case CK_ReinterpretMemberPointer:
1741 assert(getType()->isMemberPointerType())((getType()->isMemberPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isMemberPointerType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1741, __PRETTY_FUNCTION__))
;
1742 assert(getSubExpr()->getType()->isMemberPointerType())((getSubExpr()->getType()->isMemberPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1742, __PRETTY_FUNCTION__))
;
1743 goto CheckNoBasePath;
1744
1745 case CK_BitCast:
1746 // Arbitrary casts to C pointer types count as bitcasts.
1747 // Otherwise, we should only have block and ObjC pointer casts
1748 // here if they stay within the type kind.
1749 if (!getType()->isPointerType()) {
1750 assert(getType()->isObjCObjectPointerType() ==((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1751, __PRETTY_FUNCTION__))
1751 getSubExpr()->getType()->isObjCObjectPointerType())((getType()->isObjCObjectPointerType() == getSubExpr()->
getType()->isObjCObjectPointerType()) ? static_cast<void
> (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1751, __PRETTY_FUNCTION__))
;
1752 assert(getType()->isBlockPointerType() ==((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1753, __PRETTY_FUNCTION__))
1753 getSubExpr()->getType()->isBlockPointerType())((getType()->isBlockPointerType() == getSubExpr()->getType
()->isBlockPointerType()) ? static_cast<void> (0) : __assert_fail
("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1753, __PRETTY_FUNCTION__))
;
1754 }
1755 goto CheckNoBasePath;
1756
1757 case CK_AnyPointerToBlockPointerCast:
1758 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1758, __PRETTY_FUNCTION__))
;
1759 assert(getSubExpr()->getType()->isAnyPointerType() &&((getSubExpr()->getType()->isAnyPointerType() &&
!getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1760, __PRETTY_FUNCTION__))
1760 !getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isAnyPointerType() &&
!getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1760, __PRETTY_FUNCTION__))
;
1761 goto CheckNoBasePath;
1762
1763 case CK_CopyAndAutoreleaseBlockObject:
1764 assert(getType()->isBlockPointerType())((getType()->isBlockPointerType()) ? static_cast<void>
(0) : __assert_fail ("getType()->isBlockPointerType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1764, __PRETTY_FUNCTION__))
;
1765 assert(getSubExpr()->getType()->isBlockPointerType())((getSubExpr()->getType()->isBlockPointerType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1765, __PRETTY_FUNCTION__))
;
1766 goto CheckNoBasePath;
1767
1768 case CK_FunctionToPointerDecay:
1769 assert(getType()->isPointerType())((getType()->isPointerType()) ? static_cast<void> (0
) : __assert_fail ("getType()->isPointerType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1769, __PRETTY_FUNCTION__))
;
1770 assert(getSubExpr()->getType()->isFunctionType())((getSubExpr()->getType()->isFunctionType()) ? static_cast
<void> (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1770, __PRETTY_FUNCTION__))
;
1771 goto CheckNoBasePath;
1772
1773 case CK_AddressSpaceConversion: {
1774 auto Ty = getType();
1775 auto SETy = getSubExpr()->getType();
1776 assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy))((getValueKindForType(Ty) == Expr::getValueKindForType(SETy))
? static_cast<void> (0) : __assert_fail ("getValueKindForType(Ty) == Expr::getValueKindForType(SETy)"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1776, __PRETTY_FUNCTION__))
;
1777 if (isRValue()) {
1778 Ty = Ty->getPointeeType();
1779 SETy = SETy->getPointeeType();
1780 }
1781 assert(!Ty.isNull() && !SETy.isNull() &&((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace()) ? static_cast<void> (0) :
__assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1782, __PRETTY_FUNCTION__))
1782 Ty.getAddressSpace() != SETy.getAddressSpace())((!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace
() != SETy.getAddressSpace()) ? static_cast<void> (0) :
__assert_fail ("!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace()"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1782, __PRETTY_FUNCTION__))
;
1783 goto CheckNoBasePath;
1784 }
1785 // These should not have an inheritance path.
1786 case CK_Dynamic:
1787 case CK_ToUnion:
1788 case CK_ArrayToPointerDecay:
1789 case CK_NullToMemberPointer:
1790 case CK_NullToPointer:
1791 case CK_ConstructorConversion:
1792 case CK_IntegralToPointer:
1793 case CK_PointerToIntegral:
1794 case CK_ToVoid:
1795 case CK_VectorSplat:
1796 case CK_IntegralCast:
1797 case CK_BooleanToSignedIntegral:
1798 case CK_IntegralToFloating:
1799 case CK_FloatingToIntegral:
1800 case CK_FloatingCast:
1801 case CK_ObjCObjectLValueCast:
1802 case CK_FloatingRealToComplex:
1803 case CK_FloatingComplexToReal:
1804 case CK_FloatingComplexCast:
1805 case CK_FloatingComplexToIntegralComplex:
1806 case CK_IntegralRealToComplex:
1807 case CK_IntegralComplexToReal:
1808 case CK_IntegralComplexCast:
1809 case CK_IntegralComplexToFloatingComplex:
1810 case CK_ARCProduceObject:
1811 case CK_ARCConsumeObject:
1812 case CK_ARCReclaimReturnedObject:
1813 case CK_ARCExtendBlockObject:
1814 case CK_ZeroToOCLOpaqueType:
1815 case CK_IntToOCLSampler:
1816 case CK_FixedPointCast:
1817 case CK_FixedPointToIntegral:
1818 case CK_IntegralToFixedPoint:
1819 assert(!getType()->isBooleanType() && "unheralded conversion to bool")((!getType()->isBooleanType() && "unheralded conversion to bool"
) ? static_cast<void> (0) : __assert_fail ("!getType()->isBooleanType() && \"unheralded conversion to bool\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1819, __PRETTY_FUNCTION__))
;
1820 goto CheckNoBasePath;
1821
1822 case CK_Dependent:
1823 case CK_LValueToRValue:
1824 case CK_NoOp:
1825 case CK_AtomicToNonAtomic:
1826 case CK_NonAtomicToAtomic:
1827 case CK_PointerToBoolean:
1828 case CK_IntegralToBoolean:
1829 case CK_FloatingToBoolean:
1830 case CK_MemberPointerToBoolean:
1831 case CK_FloatingComplexToBoolean:
1832 case CK_IntegralComplexToBoolean:
1833 case CK_LValueBitCast: // -> bool&
1834 case CK_LValueToRValueBitCast:
1835 case CK_UserDefinedConversion: // operator bool()
1836 case CK_BuiltinFnToFnPtr:
1837 case CK_FixedPointToBoolean:
1838 CheckNoBasePath:
1839 assert(path_empty() && "Cast kind should not have a base path!")((path_empty() && "Cast kind should not have a base path!"
) ? static_cast<void> (0) : __assert_fail ("path_empty() && \"Cast kind should not have a base path!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1839, __PRETTY_FUNCTION__))
;
1840 break;
1841 }
1842 return true;
1843}
1844
1845const char *CastExpr::getCastKindName(CastKind CK) {
1846 switch (CK) {
1847#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1848#include "clang/AST/OperationKinds.def"
1849 }
1850 llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1850)
;
1851}
1852
1853namespace {
1854 const Expr *skipImplicitTemporary(const Expr *E) {
1855 // Skip through reference binding to temporary.
1856 if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
1857 E = Materialize->getSubExpr();
1858
1859 // Skip any temporary bindings; they're implicit.
1860 if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
1861 E = Binder->getSubExpr();
1862
1863 return E;
1864 }
1865}
1866
1867Expr *CastExpr::getSubExprAsWritten() {
1868 const Expr *SubExpr = nullptr;
1869 const CastExpr *E = this;
1870 do {
1871 SubExpr = skipImplicitTemporary(E->getSubExpr());
1872
1873 // Conversions by constructor and conversion functions have a
1874 // subexpression describing the call; strip it off.
1875 if (E->getCastKind() == CK_ConstructorConversion)
1876 SubExpr =
1877 skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
1878 else if (E->getCastKind() == CK_UserDefinedConversion) {
1879 assert((isa<CXXMemberCallExpr>(SubExpr) ||(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1881, __PRETTY_FUNCTION__))
1880 isa<BlockExpr>(SubExpr)) &&(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1881, __PRETTY_FUNCTION__))
1881 "Unexpected SubExpr for CK_UserDefinedConversion.")(((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>
(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? static_cast<void> (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1881, __PRETTY_FUNCTION__))
;
1882 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1883 SubExpr = MCE->getImplicitObjectArgument();
1884 }
1885
1886 // If the subexpression we're left with is an implicit cast, look
1887 // through that, too.
1888 } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
1889
1890 return const_cast<Expr*>(SubExpr);
1891}
1892
1893NamedDecl *CastExpr::getConversionFunction() const {
1894 const Expr *SubExpr = nullptr;
1895
1896 for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
1897 SubExpr = skipImplicitTemporary(E->getSubExpr());
1898
1899 if (E->getCastKind() == CK_ConstructorConversion)
1900 return cast<CXXConstructExpr>(SubExpr)->getConstructor();
1901
1902 if (E->getCastKind() == CK_UserDefinedConversion) {
1903 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
1904 return MCE->getMethodDecl();
1905 }
1906 }
1907
1908 return nullptr;
1909}
1910
1911CXXBaseSpecifier **CastExpr::path_buffer() {
1912 switch (getStmtClass()) {
1913#define ABSTRACT_STMT(x)
1914#define CASTEXPR(Type, Base) \
1915 case Stmt::Type##Class: \
1916 return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
1917#define STMT(Type, Base)
1918#include "clang/AST/StmtNodes.inc"
1919 default:
1920 llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1920)
;
1921 }
1922}
1923
1924const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
1925 QualType opType) {
1926 auto RD = unionType->castAs<RecordType>()->getDecl();
1927 return getTargetFieldForToUnionCast(RD, opType);
1928}
1929
1930const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
1931 QualType OpType) {
1932 auto &Ctx = RD->getASTContext();
1933 RecordDecl::field_iterator Field, FieldEnd;
1934 for (Field = RD->field_begin(), FieldEnd = RD->field_end();
1935 Field != FieldEnd; ++Field) {
1936 if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
1937 !Field->isUnnamedBitfield()) {
1938 return *Field;
1939 }
1940 }
1941 return nullptr;
1942}
1943
1944ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
1945 CastKind Kind, Expr *Operand,
1946 const CXXCastPath *BasePath,
1947 ExprValueKind VK) {
1948 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1949 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1950 // Per C++ [conv.lval]p3, lvalue-to-rvalue conversions on class and
1951 // std::nullptr_t have special semantics not captured by CK_LValueToRValue.
1952 assert((Kind != CK_LValueToRValue ||(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1954, __PRETTY_FUNCTION__))
1953 !(T->isNullPtrType() || T->getAsCXXRecordDecl())) &&(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1954, __PRETTY_FUNCTION__))
1954 "invalid type for lvalue-to-rvalue conversion")(((Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->
getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? static_cast<void> (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1954, __PRETTY_FUNCTION__))
;
1955 ImplicitCastExpr *E =
1956 new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
1957 if (PathSize)
1958 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1959 E->getTrailingObjects<CXXBaseSpecifier *>());
1960 return E;
1961}
1962
1963ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
1964 unsigned PathSize) {
1965 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1966 return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
1967}
1968
1969
1970CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
1971 ExprValueKind VK, CastKind K, Expr *Op,
1972 const CXXCastPath *BasePath,
1973 TypeSourceInfo *WrittenTy,
1974 SourceLocation L, SourceLocation R) {
1975 unsigned PathSize = (BasePath ? BasePath->size() : 0);
1976 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1977 CStyleCastExpr *E =
1978 new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
1979 if (PathSize)
1980 std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
1981 E->getTrailingObjects<CXXBaseSpecifier *>());
1982 return E;
1983}
1984
1985CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
1986 unsigned PathSize) {
1987 void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
1988 return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
1989}
1990
1991/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1992/// corresponds to, e.g. "<<=".
1993StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
1994 switch (Op) {
1995#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
1996#include "clang/AST/OperationKinds.def"
1997 }
1998 llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 1998)
;
1999}
2000
2001BinaryOperatorKind
2002BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
2003 switch (OO) {
2004 default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2004)
;
2005 case OO_Plus: return BO_Add;
2006 case OO_Minus: return BO_Sub;
2007 case OO_Star: return BO_Mul;
2008 case OO_Slash: return BO_Div;
2009 case OO_Percent: return BO_Rem;
2010 case OO_Caret: return BO_Xor;
2011 case OO_Amp: return BO_And;
2012 case OO_Pipe: return BO_Or;
2013 case OO_Equal: return BO_Assign;
2014 case OO_Spaceship: return BO_Cmp;
2015 case OO_Less: return BO_LT;
2016 case OO_Greater: return BO_GT;
2017 case OO_PlusEqual: return BO_AddAssign;
2018 case OO_MinusEqual: return BO_SubAssign;
2019 case OO_StarEqual: return BO_MulAssign;
2020 case OO_SlashEqual: return BO_DivAssign;
2021 case OO_PercentEqual: return BO_RemAssign;
2022 case OO_CaretEqual: return BO_XorAssign;
2023 case OO_AmpEqual: return BO_AndAssign;
2024 case OO_PipeEqual: return BO_OrAssign;
2025 case OO_LessLess: return BO_Shl;
2026 case OO_GreaterGreater: return BO_Shr;
2027 case OO_LessLessEqual: return BO_ShlAssign;
2028 case OO_GreaterGreaterEqual: return BO_ShrAssign;
2029 case OO_EqualEqual: return BO_EQ;
2030 case OO_ExclaimEqual: return BO_NE;
2031 case OO_LessEqual: return BO_LE;
2032 case OO_GreaterEqual: return BO_GE;
2033 case OO_AmpAmp: return BO_LAnd;
2034 case OO_PipePipe: return BO_LOr;
2035 case OO_Comma: return BO_Comma;
2036 case OO_ArrowStar: return BO_PtrMemI;
2037 }
2038}
2039
2040OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
2041 static const OverloadedOperatorKind OverOps[] = {
2042 /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
2043 OO_Star, OO_Slash, OO_Percent,
2044 OO_Plus, OO_Minus,
2045 OO_LessLess, OO_GreaterGreater,
2046 OO_Spaceship,
2047 OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
2048 OO_EqualEqual, OO_ExclaimEqual,
2049 OO_Amp,
2050 OO_Caret,
2051 OO_Pipe,
2052 OO_AmpAmp,
2053 OO_PipePipe,
2054 OO_Equal, OO_StarEqual,
2055 OO_SlashEqual, OO_PercentEqual,
2056 OO_PlusEqual, OO_MinusEqual,
2057 OO_LessLessEqual, OO_GreaterGreaterEqual,
2058 OO_AmpEqual, OO_CaretEqual,
2059 OO_PipeEqual,
2060 OO_Comma
2061 };
2062 return OverOps[Opc];
2063}
2064
2065bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
2066 Opcode Opc,
2067 Expr *LHS, Expr *RHS) {
2068 if (Opc != BO_Add)
2069 return false;
2070
2071 // Check that we have one pointer and one integer operand.
2072 Expr *PExp;
2073 if (LHS->getType()->isPointerType()) {
2074 if (!RHS->getType()->isIntegerType())
2075 return false;
2076 PExp = LHS;
2077 } else if (RHS->getType()->isPointerType()) {
2078 if (!LHS->getType()->isIntegerType())
2079 return false;
2080 PExp = RHS;
2081 } else {
2082 return false;
2083 }
2084
2085 // Check that the pointer is a nullptr.
2086 if (!PExp->IgnoreParenCasts()
2087 ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
2088 return false;
2089
2090 // Check that the pointee type is char-sized.
2091 const PointerType *PTy = PExp->getType()->getAs<PointerType>();
2092 if (!PTy || !PTy->getPointeeType()->isCharType())
2093 return false;
2094
2095 return true;
2096}
2097
2098static QualType getDecayedSourceLocExprType(const ASTContext &Ctx,
2099 SourceLocExpr::IdentKind Kind) {
2100 switch (Kind) {
2101 case SourceLocExpr::File:
2102 case SourceLocExpr::Function: {
2103 QualType ArrTy = Ctx.getStringLiteralArrayType(Ctx.CharTy, 0);
2104 return Ctx.getPointerType(ArrTy->getAsArrayTypeUnsafe()->getElementType());
2105 }
2106 case SourceLocExpr::Line:
2107 case SourceLocExpr::Column:
2108 return Ctx.UnsignedIntTy;
2109 }
2110 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2110)
;
2111}
2112
2113SourceLocExpr::SourceLocExpr(const ASTContext &Ctx, IdentKind Kind,
2114 SourceLocation BLoc, SourceLocation RParenLoc,
2115 DeclContext *ParentContext)
2116 : Expr(SourceLocExprClass, getDecayedSourceLocExprType(Ctx, Kind),
2117 VK_RValue, OK_Ordinary, false, false, false, false),
2118 BuiltinLoc(BLoc), RParenLoc(RParenLoc), ParentContext(ParentContext) {
2119 SourceLocExprBits.Kind = Kind;
2120}
2121
2122StringRef SourceLocExpr::getBuiltinStr() const {
2123 switch (getIdentKind()) {
2124 case File:
2125 return "__builtin_FILE";
2126 case Function:
2127 return "__builtin_FUNCTION";
2128 case Line:
2129 return "__builtin_LINE";
2130 case Column:
2131 return "__builtin_COLUMN";
2132 }
2133 llvm_unreachable("unexpected IdentKind!")::llvm::llvm_unreachable_internal("unexpected IdentKind!", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2133)
;
2134}
2135
2136APValue SourceLocExpr::EvaluateInContext(const ASTContext &Ctx,
2137 const Expr *DefaultExpr) const {
2138 SourceLocation Loc;
2139 const DeclContext *Context;
2140
2141 std::tie(Loc,
2142 Context) = [&]() -> std::pair<SourceLocation, const DeclContext *> {
2143 if (auto *DIE = dyn_cast_or_null<CXXDefaultInitExpr>(DefaultExpr))
2144 return {DIE->getUsedLocation(), DIE->getUsedContext()};
2145 if (auto *DAE = dyn_cast_or_null<CXXDefaultArgExpr>(DefaultExpr))
2146 return {DAE->getUsedLocation(), DAE->getUsedContext()};
2147 return {this->getLocation(), this->getParentContext()};
2148 }();
2149
2150 PresumedLoc PLoc = Ctx.getSourceManager().getPresumedLoc(
2151 Ctx.getSourceManager().getExpansionRange(Loc).getEnd());
2152
2153 auto MakeStringLiteral = [&](StringRef Tmp) {
2154 using LValuePathEntry = APValue::LValuePathEntry;
2155 StringLiteral *Res = Ctx.getPredefinedStringLiteralFromCache(Tmp);
2156 // Decay the string to a pointer to the first character.
2157 LValuePathEntry Path[1] = {LValuePathEntry::ArrayIndex(0)};
2158 return APValue(Res, CharUnits::Zero(), Path, /*OnePastTheEnd=*/false);
2159 };
2160
2161 switch (getIdentKind()) {
2162 case SourceLocExpr::File:
2163 return MakeStringLiteral(PLoc.getFilename());
2164 case SourceLocExpr::Function: {
2165 const Decl *CurDecl = dyn_cast_or_null<Decl>(Context);
2166 return MakeStringLiteral(
2167 CurDecl ? PredefinedExpr::ComputeName(PredefinedExpr::Function, CurDecl)
2168 : std::string(""));
2169 }
2170 case SourceLocExpr::Line:
2171 case SourceLocExpr::Column: {
2172 llvm::APSInt IntVal(Ctx.getIntWidth(Ctx.UnsignedIntTy),
2173 /*isUnsigned=*/true);
2174 IntVal = getIdentKind() == SourceLocExpr::Line ? PLoc.getLine()
2175 : PLoc.getColumn();
2176 return APValue(IntVal);
2177 }
2178 }
2179 llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2179)
;
2180}
2181
2182InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
2183 ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
2184 : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
2185 false, false),
2186 InitExprs(C, initExprs.size()),
2187 LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
2188{
2189 sawArrayRangeDesignator(false);
2190 for (unsigned I = 0; I != initExprs.size(); ++I)
2191 addDependence(initExprs[I]->getDependence());
2192
2193 InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
2194}
2195
2196void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
2197 if (NumInits > InitExprs.size())
2198 InitExprs.reserve(C, NumInits);
2199}
2200
2201void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
2202 InitExprs.resize(C, NumInits, nullptr);
2203}
2204
2205Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
2206 if (Init >= InitExprs.size()) {
2207 InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
2208 setInit(Init, expr);
2209 return nullptr;
2210 }
2211
2212 Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
2213 setInit(Init, expr);
2214 return Result;
2215}
2216
2217void InitListExpr::setArrayFiller(Expr *filler) {
2218 assert(!hasArrayFiller() && "Filler already set!")((!hasArrayFiller() && "Filler already set!") ? static_cast
<void> (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2218, __PRETTY_FUNCTION__))
;
2219 ArrayFillerOrUnionFieldInit = filler;
2220 // Fill out any "holes" in the array due to designated initializers.
2221 Expr **inits = getInits();
2222 for (unsigned i = 0, e = getNumInits(); i != e; ++i)
2223 if (inits[i] == nullptr)
2224 inits[i] = filler;
2225}
2226
2227bool InitListExpr::isStringLiteralInit() const {
2228 if (getNumInits() != 1)
2229 return false;
2230 const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
2231 if (!AT || !AT->getElementType()->isIntegerType())
2232 return false;
2233 // It is possible for getInit() to return null.
2234 const Expr *Init = getInit(0);
2235 if (!Init)
2236 return false;
2237 Init = Init->IgnoreParens();
2238 return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2239}
2240
2241bool InitListExpr::isTransparent() const {
2242 assert(isSemanticForm() && "syntactic form never semantically transparent")((isSemanticForm() && "syntactic form never semantically transparent"
) ? static_cast<void> (0) : __assert_fail ("isSemanticForm() && \"syntactic form never semantically transparent\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2242, __PRETTY_FUNCTION__))
;
2243
2244 // A glvalue InitListExpr is always just sugar.
2245 if (isGLValue()) {
2246 assert(getNumInits() == 1 && "multiple inits in glvalue init list")((getNumInits() == 1 && "multiple inits in glvalue init list"
) ? static_cast<void> (0) : __assert_fail ("getNumInits() == 1 && \"multiple inits in glvalue init list\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2246, __PRETTY_FUNCTION__))
;
2247 return true;
2248 }
2249
2250 // Otherwise, we're sugar if and only if we have exactly one initializer that
2251 // is of the same type.
2252 if (getNumInits() != 1 || !getInit(0))
2253 return false;
2254
2255 // Don't confuse aggregate initialization of a struct X { X &x; }; with a
2256 // transparent struct copy.
2257 if (!getInit(0)->isRValue() && getType()->isRecordType())
2258 return false;
2259
2260 return getType().getCanonicalType() ==
2261 getInit(0)->getType().getCanonicalType();
2262}
2263
2264bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
2265 assert(isSyntacticForm() && "only test syntactic form as zero initializer")((isSyntacticForm() && "only test syntactic form as zero initializer"
) ? static_cast<void> (0) : __assert_fail ("isSyntacticForm() && \"only test syntactic form as zero initializer\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2265, __PRETTY_FUNCTION__))
;
2266
2267 if (LangOpts.CPlusPlus || getNumInits() != 1 || !getInit(0)) {
2268 return false;
2269 }
2270
2271 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0)->IgnoreImplicit());
2272 return Lit && Lit->getValue() == 0;
2273}
2274
2275SourceLocation InitListExpr::getBeginLoc() const {
2276 if (InitListExpr *SyntacticForm = getSyntacticForm())
2277 return SyntacticForm->getBeginLoc();
2278 SourceLocation Beg = LBraceLoc;
2279 if (Beg.isInvalid()) {
2280 // Find the first non-null initializer.
2281 for (InitExprsTy::const_iterator I = InitExprs.begin(),
2282 E = InitExprs.end();
2283 I != E; ++I) {
2284 if (Stmt *S = *I) {
2285 Beg = S->getBeginLoc();
2286 break;
2287 }
2288 }
2289 }
2290 return Beg;
2291}
2292
2293SourceLocation InitListExpr::getEndLoc() const {
2294 if (InitListExpr *SyntacticForm = getSyntacticForm())
2295 return SyntacticForm->getEndLoc();
2296 SourceLocation End = RBraceLoc;
2297 if (End.isInvalid()) {
2298 // Find the first non-null initializer from the end.
2299 for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
2300 E = InitExprs.rend();
2301 I != E; ++I) {
2302 if (Stmt *S = *I) {
2303 End = S->getEndLoc();
2304 break;
2305 }
2306 }
2307 }
2308 return End;
2309}
2310
2311/// getFunctionType - Return the underlying function type for this block.
2312///
2313const FunctionProtoType *BlockExpr::getFunctionType() const {
2314 // The block pointer is never sugared, but the function type might be.
2315 return cast<BlockPointerType>(getType())
2316 ->getPointeeType()->castAs<FunctionProtoType>();
2317}
2318
2319SourceLocation BlockExpr::getCaretLocation() const {
2320 return TheBlock->getCaretLocation();
2321}
2322const Stmt *BlockExpr::getBody() const {
2323 return TheBlock->getBody();
2324}
2325Stmt *BlockExpr::getBody() {
2326 return TheBlock->getBody();
2327}
2328
2329
2330//===----------------------------------------------------------------------===//
2331// Generic Expression Routines
2332//===----------------------------------------------------------------------===//
2333
2334/// isUnusedResultAWarning - Return true if this immediate expression should
2335/// be warned about if the result is unused. If so, fill in Loc and Ranges
2336/// with location to warn on and the source range[s] to report with the
2337/// warning.
2338bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
2339 SourceRange &R1, SourceRange &R2,
2340 ASTContext &Ctx) const {
2341 // Don't warn if the expr is type dependent. The type could end up
2342 // instantiating to void.
2343 if (isTypeDependent())
2344 return false;
2345
2346 switch (getStmtClass()) {
2347 default:
2348 if (getType()->isVoidType())
2349 return false;
2350 WarnE = this;
2351 Loc = getExprLoc();
2352 R1 = getSourceRange();
2353 return true;
2354 case ParenExprClass:
2355 return cast<ParenExpr>(this)->getSubExpr()->
2356 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2357 case GenericSelectionExprClass:
2358 return cast<GenericSelectionExpr>(this)->getResultExpr()->
2359 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2360 case CoawaitExprClass:
2361 case CoyieldExprClass:
2362 return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
2363 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2364 case ChooseExprClass:
2365 return cast<ChooseExpr>(this)->getChosenSubExpr()->
2366 isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2367 case UnaryOperatorClass: {
2368 const UnaryOperator *UO = cast<UnaryOperator>(this);
2369
2370 switch (UO->getOpcode()) {
2371 case UO_Plus:
2372 case UO_Minus:
2373 case UO_AddrOf:
2374 case UO_Not:
2375 case UO_LNot:
2376 case UO_Deref:
2377 break;
2378 case UO_Coawait:
2379 // This is just the 'operator co_await' call inside the guts of a
2380 // dependent co_await call.
2381 case UO_PostInc:
2382 case UO_PostDec:
2383 case UO_PreInc:
2384 case UO_PreDec: // ++/--
2385 return false; // Not a warning.
2386 case UO_Real:
2387 case UO_Imag:
2388 // accessing a piece of a volatile complex is a side-effect.
2389 if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
2390 .isVolatileQualified())
2391 return false;
2392 break;
2393 case UO_Extension:
2394 return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2395 }
2396 WarnE = this;
2397 Loc = UO->getOperatorLoc();
2398 R1 = UO->getSubExpr()->getSourceRange();
2399 return true;
2400 }
2401 case BinaryOperatorClass: {
2402 const BinaryOperator *BO = cast<BinaryOperator>(this);
2403 switch (BO->getOpcode()) {
2404 default:
2405 break;
2406 // Consider the RHS of comma for side effects. LHS was checked by
2407 // Sema::CheckCommaOperands.
2408 case BO_Comma:
2409 // ((foo = <blah>), 0) is an idiom for hiding the result (and
2410 // lvalue-ness) of an assignment written in a macro.
2411 if (IntegerLiteral *IE =
2412 dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
2413 if (IE->getValue() == 0)
2414 return false;
2415 return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2416 // Consider '||', '&&' to have side effects if the LHS or RHS does.
2417 case BO_LAnd:
2418 case BO_LOr:
2419 if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
2420 !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
2421 return false;
2422 break;
2423 }
2424 if (BO->isAssignmentOp())
2425 return false;
2426 WarnE = this;
2427 Loc = BO->getOperatorLoc();
2428 R1 = BO->getLHS()->getSourceRange();
2429 R2 = BO->getRHS()->getSourceRange();
2430 return true;
2431 }
2432 case CompoundAssignOperatorClass:
2433 case VAArgExprClass:
2434 case AtomicExprClass:
2435 return false;
2436
2437 case ConditionalOperatorClass: {
2438 // If only one of the LHS or RHS is a warning, the operator might
2439 // be being used for control flow. Only warn if both the LHS and
2440 // RHS are warnings.
2441 const auto *Exp = cast<ConditionalOperator>(this);
2442 return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) &&
2443 Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2444 }
2445 case BinaryConditionalOperatorClass: {
2446 const auto *Exp = cast<BinaryConditionalOperator>(this);
2447 return Exp->getFalseExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2448 }
2449
2450 case MemberExprClass:
2451 WarnE = this;
2452 Loc = cast<MemberExpr>(this)->getMemberLoc();
2453 R1 = SourceRange(Loc, Loc);
2454 R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
2455 return true;
2456
2457 case ArraySubscriptExprClass:
2458 WarnE = this;
2459 Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
2460 R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
2461 R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
2462 return true;
2463
2464 case CXXOperatorCallExprClass: {
2465 // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
2466 // overloads as there is no reasonable way to define these such that they
2467 // have non-trivial, desirable side-effects. See the -Wunused-comparison
2468 // warning: operators == and != are commonly typo'ed, and so warning on them
2469 // provides additional value as well. If this list is updated,
2470 // DiagnoseUnusedComparison should be as well.
2471 const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
2472 switch (Op->getOperator()) {
2473 default:
2474 break;
2475 case OO_EqualEqual:
2476 case OO_ExclaimEqual:
2477 case OO_Less:
2478 case OO_Greater:
2479 case OO_GreaterEqual:
2480 case OO_LessEqual:
2481 if (Op->getCallReturnType(Ctx)->isReferenceType() ||
2482 Op->getCallReturnType(Ctx)->isVoidType())
2483 break;
2484 WarnE = this;
2485 Loc = Op->getOperatorLoc();
2486 R1 = Op->getSourceRange();
2487 return true;
2488 }
2489
2490 // Fallthrough for generic call handling.
2491 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2492 }
2493 case CallExprClass:
2494 case CXXMemberCallExprClass:
2495 case UserDefinedLiteralClass: {
2496 // If this is a direct call, get the callee.
2497 const CallExpr *CE = cast<CallExpr>(this);
2498 if (const Decl *FD = CE->getCalleeDecl()) {
2499 // If the callee has attribute pure, const, or warn_unused_result, warn
2500 // about it. void foo() { strlen("bar"); } should warn.
2501 //
2502 // Note: If new cases are added here, DiagnoseUnusedExprResult should be
2503 // updated to match for QoI.
2504 if (CE->hasUnusedResultAttr(Ctx) ||
2505 FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
2506 WarnE = this;
2507 Loc = CE->getCallee()->getBeginLoc();
2508 R1 = CE->getCallee()->getSourceRange();
2509
2510 if (unsigned NumArgs = CE->getNumArgs())
2511 R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
2512 CE->getArg(NumArgs - 1)->getEndLoc());
2513 return true;
2514 }
2515 }
2516 return false;
2517 }
2518
2519 // If we don't know precisely what we're looking at, let's not warn.
2520 case UnresolvedLookupExprClass:
2521 case CXXUnresolvedConstructExprClass:
2522 return false;
2523
2524 case CXXTemporaryObjectExprClass:
2525 case CXXConstructExprClass: {
2526 if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
2527 const auto *WarnURAttr = Type->getAttr<WarnUnusedResultAttr>();
2528 if (Type->hasAttr<WarnUnusedAttr>() ||
2529 (WarnURAttr && WarnURAttr->IsCXX11NoDiscard())) {
2530 WarnE = this;
2531 Loc = getBeginLoc();
2532 R1 = getSourceRange();
2533 return true;
2534 }
2535 }
2536
2537 const auto *CE = cast<CXXConstructExpr>(this);
2538 if (const CXXConstructorDecl *Ctor = CE->getConstructor()) {
2539 const auto *WarnURAttr = Ctor->getAttr<WarnUnusedResultAttr>();
2540 if (WarnURAttr && WarnURAttr->IsCXX11NoDiscard()) {
2541 WarnE = this;
2542 Loc = getBeginLoc();
2543 R1 = getSourceRange();
2544
2545 if (unsigned NumArgs = CE->getNumArgs())
2546 R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
2547 CE->getArg(NumArgs - 1)->getEndLoc());
2548 return true;
2549 }
2550 }
2551
2552 return false;
2553 }
2554
2555 case ObjCMessageExprClass: {
2556 const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
2557 if (Ctx.getLangOpts().ObjCAutoRefCount &&
2558 ME->isInstanceMessage() &&
2559 !ME->getType()->isVoidType() &&
2560 ME->getMethodFamily() == OMF_init) {
2561 WarnE = this;
2562 Loc = getExprLoc();
2563 R1 = ME->getSourceRange();
2564 return true;
2565 }
2566
2567 if (const ObjCMethodDecl *MD = ME->getMethodDecl())
2568 if (MD->hasAttr<WarnUnusedResultAttr>()) {
2569 WarnE = this;
2570 Loc = getExprLoc();
2571 return true;
2572 }
2573
2574 return false;
2575 }
2576
2577 case ObjCPropertyRefExprClass:
2578 WarnE = this;
2579 Loc = getExprLoc();
2580 R1 = getSourceRange();
2581 return true;
2582
2583 case PseudoObjectExprClass: {
2584 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
2585
2586 // Only complain about things that have the form of a getter.
2587 if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
2588 isa<BinaryOperator>(PO->getSyntacticForm()))
2589 return false;
2590
2591 WarnE = this;
2592 Loc = getExprLoc();
2593 R1 = getSourceRange();
2594 return true;
2595 }
2596
2597 case StmtExprClass: {
2598 // Statement exprs don't logically have side effects themselves, but are
2599 // sometimes used in macros in ways that give them a type that is unused.
2600 // For example ({ blah; foo(); }) will end up with a type if foo has a type.
2601 // however, if the result of the stmt expr is dead, we don't want to emit a
2602 // warning.
2603 const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
2604 if (!CS->body_empty()) {
2605 if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
2606 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2607 if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
2608 if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
2609 return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2610 }
2611
2612 if (getType()->isVoidType())
2613 return false;
2614 WarnE = this;
2615 Loc = cast<StmtExpr>(this)->getLParenLoc();
2616 R1 = getSourceRange();
2617 return true;
2618 }
2619 case CXXFunctionalCastExprClass:
2620 case CStyleCastExprClass: {
2621 // Ignore an explicit cast to void unless the operand is a non-trivial
2622 // volatile lvalue.
2623 const CastExpr *CE = cast<CastExpr>(this);
2624 if (CE->getCastKind() == CK_ToVoid) {
2625 if (CE->getSubExpr()->isGLValue() &&
2626 CE->getSubExpr()->getType().isVolatileQualified()) {
2627 const DeclRefExpr *DRE =
2628 dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
2629 if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
2630 cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
2631 !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
2632 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
2633 R1, R2, Ctx);
2634 }
2635 }
2636 return false;
2637 }
2638
2639 // If this is a cast to a constructor conversion, check the operand.
2640 // Otherwise, the result of the cast is unused.
2641 if (CE->getCastKind() == CK_ConstructorConversion)
2642 return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2643
2644 WarnE = this;
2645 if (const CXXFunctionalCastExpr *CXXCE =
2646 dyn_cast<CXXFunctionalCastExpr>(this)) {
2647 Loc = CXXCE->getBeginLoc();
2648 R1 = CXXCE->getSubExpr()->getSourceRange();
2649 } else {
2650 const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
2651 Loc = CStyleCE->getLParenLoc();
2652 R1 = CStyleCE->getSubExpr()->getSourceRange();
2653 }
2654 return true;
2655 }
2656 case ImplicitCastExprClass: {
2657 const CastExpr *ICE = cast<ImplicitCastExpr>(this);
2658
2659 // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
2660 if (ICE->getCastKind() == CK_LValueToRValue &&
2661 ICE->getSubExpr()->getType().isVolatileQualified())
2662 return false;
2663
2664 return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2665 }
2666 case CXXDefaultArgExprClass:
2667 return (cast<CXXDefaultArgExpr>(this)
2668 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2669 case CXXDefaultInitExprClass:
2670 return (cast<CXXDefaultInitExpr>(this)
2671 ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
2672
2673 case CXXNewExprClass:
2674 // FIXME: In theory, there might be new expressions that don't have side
2675 // effects (e.g. a placement new with an uninitialized POD).
2676 case CXXDeleteExprClass:
2677 return false;
2678 case MaterializeTemporaryExprClass:
2679 return cast<MaterializeTemporaryExpr>(this)
2680 ->getSubExpr()
2681 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2682 case CXXBindTemporaryExprClass:
2683 return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
2684 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2685 case ExprWithCleanupsClass:
2686 return cast<ExprWithCleanups>(this)->getSubExpr()
2687 ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
2688 }
2689}
2690
2691/// isOBJCGCCandidate - Check if an expression is objc gc'able.
2692/// returns true, if it is; false otherwise.
2693bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
2694 const Expr *E = IgnoreParens();
2695 switch (E->getStmtClass()) {
2696 default:
2697 return false;
2698 case ObjCIvarRefExprClass:
2699 return true;
2700 case Expr::UnaryOperatorClass:
2701 return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2702 case ImplicitCastExprClass:
2703 return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2704 case MaterializeTemporaryExprClass:
2705 return cast<MaterializeTemporaryExpr>(E)->getSubExpr()->isOBJCGCCandidate(
2706 Ctx);
2707 case CStyleCastExprClass:
2708 return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
2709 case DeclRefExprClass: {
2710 const Decl *D = cast<DeclRefExpr>(E)->getDecl();
2711
2712 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
2713 if (VD->hasGlobalStorage())
2714 return true;
2715 QualType T = VD->getType();
2716 // dereferencing to a pointer is always a gc'able candidate,
2717 // unless it is __weak.
2718 return T->isPointerType() &&
2719 (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
2720 }
2721 return false;
2722 }
2723 case MemberExprClass: {
2724 const MemberExpr *M = cast<MemberExpr>(E);
2725 return M->getBase()->isOBJCGCCandidate(Ctx);
2726 }
2727 case ArraySubscriptExprClass:
2728 return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
2729 }
2730}
2731
2732bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
2733 if (isTypeDependent())
2734 return false;
2735 return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
2736}
2737
2738QualType Expr::findBoundMemberType(const Expr *expr) {
2739 assert(expr->hasPlaceholderType(BuiltinType::BoundMember))((expr->hasPlaceholderType(BuiltinType::BoundMember)) ? static_cast
<void> (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2739, __PRETTY_FUNCTION__))
;
2740
2741 // Bound member expressions are always one of these possibilities:
2742 // x->m x.m x->*y x.*y
2743 // (possibly parenthesized)
2744
2745 expr = expr->IgnoreParens();
2746 if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
2747 assert(isa<CXXMethodDecl>(mem->getMemberDecl()))((isa<CXXMethodDecl>(mem->getMemberDecl())) ? static_cast
<void> (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2747, __PRETTY_FUNCTION__))
;
2748 return mem->getMemberDecl()->getType();
2749 }
2750
2751 if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
2752 QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
2753 ->getPointeeType();
2754 assert(type->isFunctionType())((type->isFunctionType()) ? static_cast<void> (0) : __assert_fail
("type->isFunctionType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2754, __PRETTY_FUNCTION__))
;
2755 return type;
2756 }
2757
2758 assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr))((isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr
>(expr)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr)"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 2758, __PRETTY_FUNCTION__))
;
2759 return QualType();
2760}
2761
2762static Expr *IgnoreImpCastsSingleStep(Expr *E) {
2763 if (auto *ICE = dyn_cast<ImplicitCastExpr>(E))
2764 return ICE->getSubExpr();
2765
2766 if (auto *FE = dyn_cast<FullExpr>(E))
2767 return FE->getSubExpr();
2768
2769 return E;
2770}
2771
2772static Expr *IgnoreImpCastsExtraSingleStep(Expr *E) {
2773 // FIXME: Skip MaterializeTemporaryExpr and SubstNonTypeTemplateParmExpr in
2774 // addition to what IgnoreImpCasts() skips to account for the current
2775 // behaviour of IgnoreParenImpCasts().
2776 Expr *SubE = IgnoreImpCastsSingleStep(E);
2777 if (SubE != E)
2778 return SubE;
2779
2780 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2781 return MTE->getSubExpr();
2782
2783 if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2784 return NTTP->getReplacement();
2785
2786 return E;
2787}
2788
2789static Expr *IgnoreCastsSingleStep(Expr *E) {
2790 if (auto *CE = dyn_cast<CastExpr>(E))
2791 return CE->getSubExpr();
2792
2793 if (auto *FE = dyn_cast<FullExpr>(E))
2794 return FE->getSubExpr();
2795
2796 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2797 return MTE->getSubExpr();
2798
2799 if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2800 return NTTP->getReplacement();
2801
2802 return E;
2803}
2804
2805static Expr *IgnoreLValueCastsSingleStep(Expr *E) {
2806 // Skip what IgnoreCastsSingleStep skips, except that only
2807 // lvalue-to-rvalue casts are skipped.
2808 if (auto *CE = dyn_cast<CastExpr>(E))
2809 if (CE->getCastKind() != CK_LValueToRValue)
2810 return E;
2811
2812 return IgnoreCastsSingleStep(E);
2813}
2814
2815static Expr *IgnoreBaseCastsSingleStep(Expr *E) {
2816 if (auto *CE = dyn_cast<CastExpr>(E))
2817 if (CE->getCastKind() == CK_DerivedToBase ||
2818 CE->getCastKind() == CK_UncheckedDerivedToBase ||
2819 CE->getCastKind() == CK_NoOp)
2820 return CE->getSubExpr();
2821
2822 return E;
2823}
2824
2825static Expr *IgnoreImplicitSingleStep(Expr *E) {
2826 Expr *SubE = IgnoreImpCastsSingleStep(E);
2827 if (SubE != E)
2828 return SubE;
2829
2830 if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E))
2831 return MTE->getSubExpr();
2832
2833 if (auto *BTE = dyn_cast<CXXBindTemporaryExpr>(E))
2834 return BTE->getSubExpr();
2835
2836 return E;
2837}
2838
2839static Expr *IgnoreImplicitAsWrittenSingleStep(Expr *E) {
2840 if (auto *ICE = dyn_cast<ImplicitCastExpr>(E))
2841 return ICE->getSubExprAsWritten();
2842
2843 return IgnoreImplicitSingleStep(E);
2844}
2845
2846static Expr *IgnoreParensOnlySingleStep(Expr *E) {
2847 if (auto *PE = dyn_cast<ParenExpr>(E))
2848 return PE->getSubExpr();
2849 return E;
2850}
2851
2852static Expr *IgnoreParensSingleStep(Expr *E) {
2853 if (auto *PE = dyn_cast<ParenExpr>(E))
2854 return PE->getSubExpr();
2855
2856 if (auto *UO = dyn_cast<UnaryOperator>(E)) {
2857 if (UO->getOpcode() == UO_Extension)
2858 return UO->getSubExpr();
2859 }
2860
2861 else if (auto *GSE = dyn_cast<GenericSelectionExpr>(E)) {
2862 if (!GSE->isResultDependent())
2863 return GSE->getResultExpr();
2864 }
2865
2866 else if (auto *CE = dyn_cast<ChooseExpr>(E)) {
2867 if (!CE->isConditionDependent())
2868 return CE->getChosenSubExpr();
2869 }
2870
2871 else if (auto *CE = dyn_cast<ConstantExpr>(E))
2872 return CE->getSubExpr();
2873
2874 return E;
2875}
2876
2877static Expr *IgnoreNoopCastsSingleStep(const ASTContext &Ctx, Expr *E) {
2878 if (auto *CE = dyn_cast<CastExpr>(E)) {
2879 // We ignore integer <-> casts that are of the same width, ptr<->ptr and
2880 // ptr<->int casts of the same width. We also ignore all identity casts.
2881 Expr *SubExpr = CE->getSubExpr();
2882 bool IsIdentityCast =
2883 Ctx.hasSameUnqualifiedType(E->getType(), SubExpr->getType());
2884 bool IsSameWidthCast =
2885 (E->getType()->isPointerType() || E->getType()->isIntegralType(Ctx)) &&
2886 (SubExpr->getType()->isPointerType() ||
2887 SubExpr->getType()->isIntegralType(Ctx)) &&
2888 (Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SubExpr->getType()));
2889
2890 if (IsIdentityCast || IsSameWidthCast)
2891 return SubExpr;
2892 }
2893
2894 else if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
2895 return NTTP->getReplacement();
2896
2897 return E;
2898}
2899
2900static Expr *IgnoreExprNodesImpl(Expr *E) { return E; }
2901template <typename FnTy, typename... FnTys>
2902static Expr *IgnoreExprNodesImpl(Expr *E, FnTy &&Fn, FnTys &&... Fns) {
2903 return IgnoreExprNodesImpl(Fn(E), std::forward<FnTys>(Fns)...);
2904}
2905
2906/// Given an expression E and functions Fn_1,...,Fn_n : Expr * -> Expr *,
2907/// Recursively apply each of the functions to E until reaching a fixed point.
2908/// Note that a null E is valid; in this case nothing is done.
2909template <typename... FnTys>
2910static Expr *IgnoreExprNodes(Expr *E, FnTys &&... Fns) {
2911 Expr *LastE = nullptr;
2912 while (E != LastE) {
2913 LastE = E;
2914 E = IgnoreExprNodesImpl(E, std::forward<FnTys>(Fns)...);
2915 }
2916 return E;
2917}
2918
2919Expr *Expr::IgnoreImpCasts() {
2920 return IgnoreExprNodes(this, IgnoreImpCastsSingleStep);
2921}
2922
2923Expr *Expr::IgnoreCasts() {
2924 return IgnoreExprNodes(this, IgnoreCastsSingleStep);
2925}
2926
2927Expr *Expr::IgnoreImplicit() {
2928 return IgnoreExprNodes(this, IgnoreImplicitSingleStep);
2929}
2930
2931Expr *Expr::IgnoreImplicitAsWritten() {
2932 return IgnoreExprNodes(this, IgnoreImplicitAsWrittenSingleStep);
2933}
2934
2935Expr *Expr::IgnoreParens() {
2936 return IgnoreExprNodes(this, IgnoreParensSingleStep);
2937}
2938
2939Expr *Expr::IgnoreParenImpCasts() {
2940 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2941 IgnoreImpCastsExtraSingleStep);
2942}
2943
2944Expr *Expr::IgnoreParenCasts() {
2945 return IgnoreExprNodes(this, IgnoreParensSingleStep, IgnoreCastsSingleStep);
2946}
2947
2948Expr *Expr::IgnoreConversionOperator() {
2949 if (auto *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
2950 if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
2951 return MCE->getImplicitObjectArgument();
2952 }
2953 return this;
2954}
2955
2956Expr *Expr::IgnoreParenLValueCasts() {
2957 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2958 IgnoreLValueCastsSingleStep);
2959}
2960
2961Expr *Expr::ignoreParenBaseCasts() {
2962 return IgnoreExprNodes(this, IgnoreParensSingleStep,
2963 IgnoreBaseCastsSingleStep);
2964}
2965
2966Expr *Expr::IgnoreParenNoopCasts(const ASTContext &Ctx) {
2967 return IgnoreExprNodes(this, IgnoreParensSingleStep, [&Ctx](Expr *E) {
2968 return IgnoreNoopCastsSingleStep(Ctx, E);
2969 });
2970}
2971
2972Expr *Expr::IgnoreUnlessSpelledInSource() {
2973 Expr *E = this;
2974
2975 Expr *LastE = nullptr;
2976 while (E != LastE) {
2977 LastE = E;
2978 E = IgnoreExprNodes(E, IgnoreImplicitSingleStep, IgnoreImpCastsSingleStep,
2979 IgnoreParensOnlySingleStep);
2980
2981 auto SR = E->getSourceRange();
2982
2983 if (auto *C = dyn_cast<CXXConstructExpr>(E)) {
2984 if (C->getNumArgs() == 1) {
2985 Expr *A = C->getArg(0);
2986 if (A->getSourceRange() == SR || !isa<CXXTemporaryObjectExpr>(C))
2987 E = A;
2988 }
2989 }
2990
2991 if (auto *C = dyn_cast<CXXMemberCallExpr>(E)) {
2992 Expr *ExprNode = C->getImplicitObjectArgument()->IgnoreParenImpCasts();
2993 if (ExprNode->getSourceRange() == SR)
2994 E = ExprNode;
2995 }
2996 }
2997
2998 return E;
2999}
3000
3001bool Expr::isDefaultArgument() const {
3002 const Expr *E = this;
3003 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
3004 E = M->getSubExpr();
3005
3006 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
3007 E = ICE->getSubExprAsWritten();
3008
3009 return isa<CXXDefaultArgExpr>(E);
3010}
3011
3012/// Skip over any no-op casts and any temporary-binding
3013/// expressions.
3014static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
3015 if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
3016 E = M->getSubExpr();
3017
3018 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3019 if (ICE->getCastKind() == CK_NoOp)
3020 E = ICE->getSubExpr();
3021 else
3022 break;
3023 }
3024
3025 while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
3026 E = BE->getSubExpr();
3027
3028 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3029 if (ICE->getCastKind() == CK_NoOp)
3030 E = ICE->getSubExpr();
3031 else
3032 break;
3033 }
3034
3035 return E->IgnoreParens();
3036}
3037
3038/// isTemporaryObject - Determines if this expression produces a
3039/// temporary of the given class type.
3040bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
3041 if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
3042 return false;
3043
3044 const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
3045
3046 // Temporaries are by definition pr-values of class type.
3047 if (!E->Classify(C).isPRValue()) {
3048 // In this context, property reference is a message call and is pr-value.
3049 if (!isa<ObjCPropertyRefExpr>(E))
3050 return false;
3051 }
3052
3053 // Black-list a few cases which yield pr-values of class type that don't
3054 // refer to temporaries of that type:
3055
3056 // - implicit derived-to-base conversions
3057 if (isa<ImplicitCastExpr>(E)) {
3058 switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
3059 case CK_DerivedToBase:
3060 case CK_UncheckedDerivedToBase:
3061 return false;
3062 default:
3063 break;
3064 }
3065 }
3066
3067 // - member expressions (all)
3068 if (isa<MemberExpr>(E))
3069 return false;
3070
3071 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
3072 if (BO->isPtrMemOp())
3073 return false;
3074
3075 // - opaque values (all)
3076 if (isa<OpaqueValueExpr>(E))
3077 return false;
3078
3079 return true;
3080}
3081
3082bool Expr::isImplicitCXXThis() const {
3083 const Expr *E = this;
3084
3085 // Strip away parentheses and casts we don't care about.
3086 while (true) {
3087 if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
3088 E = Paren->getSubExpr();
3089 continue;
3090 }
3091
3092 if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3093 if (ICE->getCastKind() == CK_NoOp ||
3094 ICE->getCastKind() == CK_LValueToRValue ||
3095 ICE->getCastKind() == CK_DerivedToBase ||
3096 ICE->getCastKind() == CK_UncheckedDerivedToBase) {
3097 E = ICE->getSubExpr();
3098 continue;
3099 }
3100 }
3101
3102 if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
3103 if (UnOp->getOpcode() == UO_Extension) {
3104 E = UnOp->getSubExpr();
3105 continue;
3106 }
3107 }
3108
3109 if (const MaterializeTemporaryExpr *M
3110 = dyn_cast<MaterializeTemporaryExpr>(E)) {
3111 E = M->getSubExpr();
3112 continue;
3113 }
3114
3115 break;
3116 }
3117
3118 if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
3119 return This->isImplicit();
3120
3121 return false;
3122}
3123
3124/// hasAnyTypeDependentArguments - Determines if any of the expressions
3125/// in Exprs is type-dependent.
3126bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
3127 for (unsigned I = 0; I < Exprs.size(); ++I)
3128 if (Exprs[I]->isTypeDependent())
3129 return true;
3130
3131 return false;
3132}
3133
3134bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
3135 const Expr **Culprit) const {
3136 assert(!isValueDependent() &&((!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3137, __PRETTY_FUNCTION__))
3137 "Expression evaluator can't be called on a dependent expression.")((!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? static_cast<void> (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3137, __PRETTY_FUNCTION__))
;
3138
3139 // This function is attempting whether an expression is an initializer
3140 // which can be evaluated at compile-time. It very closely parallels
3141 // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
3142 // will lead to unexpected results. Like ConstExprEmitter, it falls back
3143 // to isEvaluatable most of the time.
3144 //
3145 // If we ever capture reference-binding directly in the AST, we can
3146 // kill the second parameter.
3147
3148 if (IsForRef) {
3149 EvalResult Result;
3150 if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
3151 return true;
3152 if (Culprit)
3153 *Culprit = this;
3154 return false;
3155 }
3156
3157 switch (getStmtClass()) {
3158 default: break;
3159 case StringLiteralClass:
3160 case ObjCEncodeExprClass:
3161 return true;
3162 case CXXTemporaryObjectExprClass:
3163 case CXXConstructExprClass: {
3164 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3165
3166 if (CE->getConstructor()->isTrivial() &&
3167 CE->getConstructor()->getParent()->hasTrivialDestructor()) {
3168 // Trivial default constructor
3169 if (!CE->getNumArgs()) return true;
3170
3171 // Trivial copy constructor
3172 assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument")((CE->getNumArgs() == 1 && "trivial ctor with > 1 argument"
) ? static_cast<void> (0) : __assert_fail ("CE->getNumArgs() == 1 && \"trivial ctor with > 1 argument\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3172, __PRETTY_FUNCTION__))
;
3173 return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
3174 }
3175
3176 break;
3177 }
3178 case ConstantExprClass: {
3179 // FIXME: We should be able to return "true" here, but it can lead to extra
3180 // error messages. E.g. in Sema/array-init.c.
3181 const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
3182 return Exp->isConstantInitializer(Ctx, false, Culprit);
3183 }
3184 case CompoundLiteralExprClass: {
3185 // This handles gcc's extension that allows global initializers like
3186 // "struct x {int x;} x = (struct x) {};".
3187 // FIXME: This accepts other cases it shouldn't!
3188 const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
3189 return Exp->isConstantInitializer(Ctx, false, Culprit);
3190 }
3191 case DesignatedInitUpdateExprClass: {
3192 const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
3193 return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
3194 DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
3195 }
3196 case InitListExprClass: {
3197 const InitListExpr *ILE = cast<InitListExpr>(this);
3198 assert(ILE->isSemanticForm() && "InitListExpr must be in semantic form")((ILE->isSemanticForm() && "InitListExpr must be in semantic form"
) ? static_cast<void> (0) : __assert_fail ("ILE->isSemanticForm() && \"InitListExpr must be in semantic form\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3198, __PRETTY_FUNCTION__))
;
3199 if (ILE->getType()->isArrayType()) {
3200 unsigned numInits = ILE->getNumInits();
3201 for (unsigned i = 0; i < numInits; i++) {
3202 if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
3203 return false;
3204 }
3205 return true;
3206 }
3207
3208 if (ILE->getType()->isRecordType()) {
3209 unsigned ElementNo = 0;
3210 RecordDecl *RD = ILE->getType()->castAs<RecordType>()->getDecl();
3211 for (const auto *Field : RD->fields()) {
3212 // If this is a union, skip all the fields that aren't being initialized.
3213 if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
3214 continue;
3215
3216 // Don't emit anonymous bitfields, they just affect layout.
3217 if (Field->isUnnamedBitfield())
3218 continue;
3219
3220 if (ElementNo < ILE->getNumInits()) {
3221 const Expr *Elt = ILE->getInit(ElementNo++);
3222 if (Field->isBitField()) {
3223 // Bitfields have to evaluate to an integer.
3224 EvalResult Result;
3225 if (!Elt->EvaluateAsInt(Result, Ctx)) {
3226 if (Culprit)
3227 *Culprit = Elt;
3228 return false;
3229 }
3230 } else {
3231 bool RefType = Field->getType()->isReferenceType();
3232 if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
3233 return false;
3234 }
3235 }
3236 }
3237 return true;
3238 }
3239
3240 break;
3241 }
3242 case ImplicitValueInitExprClass:
3243 case NoInitExprClass:
3244 return true;
3245 case ParenExprClass:
3246 return cast<ParenExpr>(this)->getSubExpr()
3247 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3248 case GenericSelectionExprClass:
3249 return cast<GenericSelectionExpr>(this)->getResultExpr()
3250 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3251 case ChooseExprClass:
3252 if (cast<ChooseExpr>(this)->isConditionDependent()) {
3253 if (Culprit)
3254 *Culprit = this;
3255 return false;
3256 }
3257 return cast<ChooseExpr>(this)->getChosenSubExpr()
3258 ->isConstantInitializer(Ctx, IsForRef, Culprit);
3259 case UnaryOperatorClass: {
3260 const UnaryOperator* Exp = cast<UnaryOperator>(this);
3261 if (Exp->getOpcode() == UO_Extension)
3262 return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3263 break;
3264 }
3265 case CXXFunctionalCastExprClass:
3266 case CXXStaticCastExprClass:
3267 case ImplicitCastExprClass:
3268 case CStyleCastExprClass:
3269 case ObjCBridgedCastExprClass:
3270 case CXXDynamicCastExprClass:
3271 case CXXReinterpretCastExprClass:
3272 case CXXConstCastExprClass: {
3273 const CastExpr *CE = cast<CastExpr>(this);
3274
3275 // Handle misc casts we want to ignore.
3276 if (CE->getCastKind() == CK_NoOp ||
3277 CE->getCastKind() == CK_LValueToRValue ||
3278 CE->getCastKind() == CK_ToUnion ||
3279 CE->getCastKind() == CK_ConstructorConversion ||
3280 CE->getCastKind() == CK_NonAtomicToAtomic ||
3281 CE->getCastKind() == CK_AtomicToNonAtomic ||
3282 CE->getCastKind() == CK_IntToOCLSampler)
3283 return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
3284
3285 break;
3286 }
3287 case MaterializeTemporaryExprClass:
3288 return cast<MaterializeTemporaryExpr>(this)
3289 ->getSubExpr()
3290 ->isConstantInitializer(Ctx, false, Culprit);
3291
3292 case SubstNonTypeTemplateParmExprClass:
3293 return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
3294 ->isConstantInitializer(Ctx, false, Culprit);
3295 case CXXDefaultArgExprClass:
3296 return cast<CXXDefaultArgExpr>(this)->getExpr()
3297 ->isConstantInitializer(Ctx, false, Culprit);
3298 case CXXDefaultInitExprClass:
3299 return cast<CXXDefaultInitExpr>(this)->getExpr()
3300 ->isConstantInitializer(Ctx, false, Culprit);
3301 }
3302 // Allow certain forms of UB in constant initializers: signed integer
3303 // overflow and floating-point division by zero. We'll give a warning on
3304 // these, but they're common enough that we have to accept them.
3305 if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
3306 return true;
3307 if (Culprit)
3308 *Culprit = this;
3309 return false;
3310}
3311
3312bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
3313 const FunctionDecl* FD = getDirectCallee();
3314 if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
3315 FD->getBuiltinID() != Builtin::BI__builtin_assume))
3316 return false;
3317
3318 const Expr* Arg = getArg(0);
3319 bool ArgVal;
3320 return !Arg->isValueDependent() &&
3321 Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3322}
3323
3324namespace {
3325 /// Look for any side effects within a Stmt.
3326 class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
3327 typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
3328 const bool IncludePossibleEffects;
3329 bool HasSideEffects;
3330
3331 public:
3332 explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
3333 : Inherited(Context),
3334 IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
3335
3336 bool hasSideEffects() const { return HasSideEffects; }
3337
3338 void VisitExpr(const Expr *E) {
3339 if (!HasSideEffects &&
3340 E->HasSideEffects(Context, IncludePossibleEffects))
3341 HasSideEffects = true;
3342 }
3343 };
3344}
3345
3346bool Expr::HasSideEffects(const ASTContext &Ctx,
3347 bool IncludePossibleEffects) const {
3348 // In circumstances where we care about definite side effects instead of
3349 // potential side effects, we want to ignore expressions that are part of a
3350 // macro expansion as a potential side effect.
3351 if (!IncludePossibleEffects && getExprLoc().isMacroID())
3352 return false;
3353
3354 if (isInstantiationDependent())
3355 return IncludePossibleEffects;
3356
3357 switch (getStmtClass()) {
3358 case NoStmtClass:
3359 #define ABSTRACT_STMT(Type)
3360 #define STMT(Type, Base) case Type##Class:
3361 #define EXPR(Type, Base)
3362 #include "clang/AST/StmtNodes.inc"
3363 llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3363)
;
3364
3365 case DependentScopeDeclRefExprClass:
3366 case CXXUnresolvedConstructExprClass:
3367 case CXXDependentScopeMemberExprClass:
3368 case UnresolvedLookupExprClass:
3369 case UnresolvedMemberExprClass:
3370 case PackExpansionExprClass:
3371 case SubstNonTypeTemplateParmPackExprClass:
3372 case FunctionParmPackExprClass:
3373 case TypoExprClass:
3374 case CXXFoldExprClass:
3375 llvm_unreachable("shouldn't see dependent / unresolved nodes here")::llvm::llvm_unreachable_internal("shouldn't see dependent / unresolved nodes here"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3375)
;
3376
3377 case DeclRefExprClass:
3378 case ObjCIvarRefExprClass:
3379 case PredefinedExprClass:
3380 case IntegerLiteralClass:
3381 case FixedPointLiteralClass:
3382 case FloatingLiteralClass:
3383 case ImaginaryLiteralClass:
3384 case StringLiteralClass:
3385 case CharacterLiteralClass:
3386 case OffsetOfExprClass:
3387 case ImplicitValueInitExprClass:
3388 case UnaryExprOrTypeTraitExprClass:
3389 case AddrLabelExprClass:
3390 case GNUNullExprClass:
3391 case ArrayInitIndexExprClass:
3392 case NoInitExprClass:
3393 case CXXBoolLiteralExprClass:
3394 case CXXNullPtrLiteralExprClass:
3395 case CXXThisExprClass:
3396 case CXXScalarValueInitExprClass:
3397 case TypeTraitExprClass:
3398 case ArrayTypeTraitExprClass:
3399 case ExpressionTraitExprClass:
3400 case CXXNoexceptExprClass:
3401 case SizeOfPackExprClass:
3402 case ObjCStringLiteralClass:
3403 case ObjCEncodeExprClass:
3404 case ObjCBoolLiteralExprClass:
3405 case ObjCAvailabilityCheckExprClass:
3406 case CXXUuidofExprClass:
3407 case OpaqueValueExprClass:
3408 case SourceLocExprClass:
3409 case ConceptSpecializationExprClass:
3410 case RequiresExprClass:
3411 // These never have a side-effect.
3412 return false;
3413
3414 case ConstantExprClass:
3415 // FIXME: Move this into the "return false;" block above.
3416 return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
3417 Ctx, IncludePossibleEffects);
3418
3419 case CallExprClass:
3420 case CXXOperatorCallExprClass:
3421 case CXXMemberCallExprClass:
3422 case CUDAKernelCallExprClass:
3423 case UserDefinedLiteralClass: {
3424 // We don't know a call definitely has side effects, except for calls
3425 // to pure/const functions that definitely don't.
3426 // If the call itself is considered side-effect free, check the operands.
3427 const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
3428 bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
3429 if (IsPure || !IncludePossibleEffects)
3430 break;
3431 return true;
3432 }
3433
3434 case BlockExprClass:
3435 case CXXBindTemporaryExprClass:
3436 if (!IncludePossibleEffects)
3437 break;
3438 return true;
3439
3440 case MSPropertyRefExprClass:
3441 case MSPropertySubscriptExprClass:
3442 case CompoundAssignOperatorClass:
3443 case VAArgExprClass:
3444 case AtomicExprClass:
3445 case CXXThrowExprClass:
3446 case CXXNewExprClass:
3447 case CXXDeleteExprClass:
3448 case CoawaitExprClass:
3449 case DependentCoawaitExprClass:
3450 case CoyieldExprClass:
3451 // These always have a side-effect.
3452 return true;
3453
3454 case StmtExprClass: {
3455 // StmtExprs have a side-effect if any substatement does.
3456 SideEffectFinder Finder(Ctx, IncludePossibleEffects);
3457 Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
3458 return Finder.hasSideEffects();
3459 }
3460
3461 case ExprWithCleanupsClass:
3462 if (IncludePossibleEffects)
3463 if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
3464 return true;
3465 break;
3466
3467 case ParenExprClass:
3468 case ArraySubscriptExprClass:
3469 case OMPArraySectionExprClass:
3470 case MemberExprClass:
3471 case ConditionalOperatorClass:
3472 case BinaryConditionalOperatorClass:
3473 case CompoundLiteralExprClass:
3474 case ExtVectorElementExprClass:
3475 case DesignatedInitExprClass:
3476 case DesignatedInitUpdateExprClass:
3477 case ArrayInitLoopExprClass:
3478 case ParenListExprClass:
3479 case CXXPseudoDestructorExprClass:
3480 case CXXRewrittenBinaryOperatorClass:
3481 case CXXStdInitializerListExprClass:
3482 case SubstNonTypeTemplateParmExprClass:
3483 case MaterializeTemporaryExprClass:
3484 case ShuffleVectorExprClass:
3485 case ConvertVectorExprClass:
3486 case AsTypeExprClass:
3487 // These have a side-effect if any subexpression does.
3488 break;
3489
3490 case UnaryOperatorClass:
3491 if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
3492 return true;
3493 break;
3494
3495 case BinaryOperatorClass:
3496 if (cast<BinaryOperator>(this)->isAssignmentOp())
3497 return true;
3498 break;
3499
3500 case InitListExprClass:
3501 // FIXME: The children for an InitListExpr doesn't include the array filler.
3502 if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
3503 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3504 return true;
3505 break;
3506
3507 case GenericSelectionExprClass:
3508 return cast<GenericSelectionExpr>(this)->getResultExpr()->
3509 HasSideEffects(Ctx, IncludePossibleEffects);
3510
3511 case ChooseExprClass:
3512 return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
3513 Ctx, IncludePossibleEffects);
3514
3515 case CXXDefaultArgExprClass:
3516 return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
3517 Ctx, IncludePossibleEffects);
3518
3519 case CXXDefaultInitExprClass: {
3520 const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
3521 if (const Expr *E = FD->getInClassInitializer())
3522 return E->HasSideEffects(Ctx, IncludePossibleEffects);
3523 // If we've not yet parsed the initializer, assume it has side-effects.
3524 return true;
3525 }
3526
3527 case CXXDynamicCastExprClass: {
3528 // A dynamic_cast expression has side-effects if it can throw.
3529 const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
3530 if (DCE->getTypeAsWritten()->isReferenceType() &&
3531 DCE->getCastKind() == CK_Dynamic)
3532 return true;
3533 }
3534 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3535 case ImplicitCastExprClass:
3536 case CStyleCastExprClass:
3537 case CXXStaticCastExprClass:
3538 case CXXReinterpretCastExprClass:
3539 case CXXConstCastExprClass:
3540 case CXXFunctionalCastExprClass:
3541 case BuiltinBitCastExprClass: {
3542 // While volatile reads are side-effecting in both C and C++, we treat them
3543 // as having possible (not definite) side-effects. This allows idiomatic
3544 // code to behave without warning, such as sizeof(*v) for a volatile-
3545 // qualified pointer.
3546 if (!IncludePossibleEffects)
3547 break;
3548
3549 const CastExpr *CE = cast<CastExpr>(this);
3550 if (CE->getCastKind() == CK_LValueToRValue &&
3551 CE->getSubExpr()->getType().isVolatileQualified())
3552 return true;
3553 break;
3554 }
3555
3556 case CXXTypeidExprClass:
3557 // typeid might throw if its subexpression is potentially-evaluated, so has
3558 // side-effects in that case whether or not its subexpression does.
3559 return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
3560
3561 case CXXConstructExprClass:
3562 case CXXTemporaryObjectExprClass: {
3563 const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
3564 if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
3565 return true;
3566 // A trivial constructor does not add any side-effects of its own. Just look
3567 // at its arguments.
3568 break;
3569 }
3570
3571 case CXXInheritedCtorInitExprClass: {
3572 const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
3573 if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
3574 return true;
3575 break;
3576 }
3577
3578 case LambdaExprClass: {
3579 const LambdaExpr *LE = cast<LambdaExpr>(this);
3580 for (Expr *E : LE->capture_inits())
3581 if (E->HasSideEffects(Ctx, IncludePossibleEffects))
3582 return true;
3583 return false;
3584 }
3585
3586 case PseudoObjectExprClass: {
3587 // Only look for side-effects in the semantic form, and look past
3588 // OpaqueValueExpr bindings in that form.
3589 const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
3590 for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
3591 E = PO->semantics_end();
3592 I != E; ++I) {
3593 const Expr *Subexpr = *I;
3594 if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
3595 Subexpr = OVE->getSourceExpr();
3596 if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
3597 return true;
3598 }
3599 return false;
3600 }
3601
3602 case ObjCBoxedExprClass:
3603 case ObjCArrayLiteralClass:
3604 case ObjCDictionaryLiteralClass:
3605 case ObjCSelectorExprClass:
3606 case ObjCProtocolExprClass:
3607 case ObjCIsaExprClass:
3608 case ObjCIndirectCopyRestoreExprClass:
3609 case ObjCSubscriptRefExprClass:
3610 case ObjCBridgedCastExprClass:
3611 case ObjCMessageExprClass:
3612 case ObjCPropertyRefExprClass:
3613 // FIXME: Classify these cases better.
3614 if (IncludePossibleEffects)
3615 return true;
3616 break;
3617 }
3618
3619 // Recurse to children.
3620 for (const Stmt *SubStmt : children())
3621 if (SubStmt &&
3622 cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
3623 return true;
3624
3625 return false;
3626}
3627
3628namespace {
3629 /// Look for a call to a non-trivial function within an expression.
3630 class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
3631 {
3632 typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
3633
3634 bool NonTrivial;
3635
3636 public:
3637 explicit NonTrivialCallFinder(const ASTContext &Context)
3638 : Inherited(Context), NonTrivial(false) { }
3639
3640 bool hasNonTrivialCall() const { return NonTrivial; }
3641
3642 void VisitCallExpr(const CallExpr *E) {
3643 if (const CXXMethodDecl *Method
3644 = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
3645 if (Method->isTrivial()) {
3646 // Recurse to children of the call.
3647 Inherited::VisitStmt(E);
3648 return;
3649 }
3650 }
3651
3652 NonTrivial = true;
3653 }
3654
3655 void VisitCXXConstructExpr(const CXXConstructExpr *E) {
3656 if (E->getConstructor()->isTrivial()) {
3657 // Recurse to children of the call.
3658 Inherited::VisitStmt(E);
3659 return;
3660 }
3661
3662 NonTrivial = true;
3663 }
3664
3665 void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
3666 if (E->getTemporary()->getDestructor()->isTrivial()) {
3667 Inherited::VisitStmt(E);
3668 return;
3669 }
3670
3671 NonTrivial = true;
3672 }
3673 };
3674}
3675
3676bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
3677 NonTrivialCallFinder Finder(Ctx);
3678 Finder.Visit(this);
3679 return Finder.hasNonTrivialCall();
3680}
3681
3682/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3683/// pointer constant or not, as well as the specific kind of constant detected.
3684/// Null pointer constants can be integer constant expressions with the
3685/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3686/// (a GNU extension).
3687Expr::NullPointerConstantKind
3688Expr::isNullPointerConstant(ASTContext &Ctx,
3689 NullPointerConstantValueDependence NPC) const {
3690 if (isValueDependent() &&
3691 (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
3692 switch (NPC) {
3693 case NPC_NeverValueDependent:
3694 llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3694)
;
3695 case NPC_ValueDependentIsNull:
3696 if (isTypeDependent() || getType()->isIntegralType(Ctx))
3697 return NPCK_ZeroExpression;
3698 else
3699 return NPCK_NotNull;
3700
3701 case NPC_ValueDependentIsNotNull:
3702 return NPCK_NotNull;
3703 }
3704 }
3705
3706 // Strip off a cast to void*, if it exists. Except in C++.
3707 if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
3708 if (!Ctx.getLangOpts().CPlusPlus) {
3709 // Check that it is a cast to void*.
3710 if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
3711 QualType Pointee = PT->getPointeeType();
3712 Qualifiers Qs = Pointee.getQualifiers();
3713 // Only (void*)0 or equivalent are treated as nullptr. If pointee type
3714 // has non-default address space it is not treated as nullptr.
3715 // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
3716 // since it cannot be assigned to a pointer to constant address space.
3717 if ((Ctx.getLangOpts().OpenCLVersion >= 200 &&
3718 Pointee.getAddressSpace() == LangAS::opencl_generic) ||
3719 (Ctx.getLangOpts().OpenCL &&
3720 Ctx.getLangOpts().OpenCLVersion < 200 &&
3721 Pointee.getAddressSpace() == LangAS::opencl_private))
3722 Qs.removeAddressSpace();
3723
3724 if (Pointee->isVoidType() && Qs.empty() && // to void*
3725 CE->getSubExpr()->getType()->isIntegerType()) // from int
3726 return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3727 }
3728 }
3729 } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
3730 // Ignore the ImplicitCastExpr type entirely.
3731 return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3732 } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
3733 // Accept ((void*)0) as a null pointer constant, as many other
3734 // implementations do.
3735 return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3736 } else if (const GenericSelectionExpr *GE =
3737 dyn_cast<GenericSelectionExpr>(this)) {
3738 if (GE->isResultDependent())
3739 return NPCK_NotNull;
3740 return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
3741 } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
3742 if (CE->isConditionDependent())
3743 return NPCK_NotNull;
3744 return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
3745 } else if (const CXXDefaultArgExpr *DefaultArg
3746 = dyn_cast<CXXDefaultArgExpr>(this)) {
3747 // See through default argument expressions.
3748 return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
3749 } else if (const CXXDefaultInitExpr *DefaultInit
3750 = dyn_cast<CXXDefaultInitExpr>(this)) {
3751 // See through default initializer expressions.
3752 return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
3753 } else if (isa<GNUNullExpr>(this)) {
3754 // The GNU __null extension is always a null pointer constant.
3755 return NPCK_GNUNull;
3756 } else if (const MaterializeTemporaryExpr *M
3757 = dyn_cast<MaterializeTemporaryExpr>(this)) {
3758 return M->getSubExpr()->isNullPointerConstant(Ctx, NPC);
3759 } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
3760 if (const Expr *Source = OVE->getSourceExpr())
3761 return Source->isNullPointerConstant(Ctx, NPC);
3762 }
3763
3764 // C++11 nullptr_t is always a null pointer constant.
3765 if (getType()->isNullPtrType())
3766 return NPCK_CXX11_nullptr;
3767
3768 if (const RecordType *UT = getType()->getAsUnionType())
3769 if (!Ctx.getLangOpts().CPlusPlus11 &&
3770 UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
3771 if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
3772 const Expr *InitExpr = CLE->getInitializer();
3773 if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
3774 return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
3775 }
3776 // This expression must be an integer type.
3777 if (!getType()->isIntegerType() ||
3778 (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
3779 return NPCK_NotNull;
3780
3781 if (Ctx.getLangOpts().CPlusPlus11) {
3782 // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
3783 // value zero or a prvalue of type std::nullptr_t.
3784 // Microsoft mode permits C++98 rules reflecting MSVC behavior.
3785 const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
3786 if (Lit && !Lit->getValue())
3787 return NPCK_ZeroLiteral;
3788 else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
3789 return NPCK_NotNull;
3790 } else {
3791 // If we have an integer constant expression, we need to *evaluate* it and
3792 // test for the value 0.
3793 if (!isIntegerConstantExpr(Ctx))
3794 return NPCK_NotNull;
3795 }
3796
3797 if (EvaluateKnownConstInt(Ctx) != 0)
3798 return NPCK_NotNull;
3799
3800 if (isa<IntegerLiteral>(this))
3801 return NPCK_ZeroLiteral;
3802 return NPCK_ZeroExpression;
3803}
3804
3805/// If this expression is an l-value for an Objective C
3806/// property, find the underlying property reference expression.
3807const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
3808 const Expr *E = this;
3809 while (true) {
3810 assert((E->getValueKind() == VK_LValue &&(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3812, __PRETTY_FUNCTION__))
3811 E->getObjectKind() == OK_ObjCProperty) &&(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3812, __PRETTY_FUNCTION__))
3812 "expression is not a property reference")(((E->getValueKind() == VK_LValue && E->getObjectKind
() == OK_ObjCProperty) && "expression is not a property reference"
) ? static_cast<void> (0) : __assert_fail ("(E->getValueKind() == VK_LValue && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 3812, __PRETTY_FUNCTION__))
;
3813 E = E->IgnoreParenCasts();
3814 if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3815 if (BO->getOpcode() == BO_Comma) {
3816 E = BO->getRHS();
3817 continue;
3818 }
3819 }
3820
3821 break;
3822 }
3823
3824 return cast<ObjCPropertyRefExpr>(E);
3825}
3826
3827bool Expr::isObjCSelfExpr() const {
3828 const Expr *E = IgnoreParenImpCasts();
3829
3830 const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
3831 if (!DRE)
3832 return false;
3833
3834 const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
3835 if (!Param)
3836 return false;
3837
3838 const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
3839 if (!M)
3840 return false;
3841
3842 return M->getSelfDecl() == Param;
3843}
3844
3845FieldDecl *Expr::getSourceBitField() {
3846 Expr *E = this->IgnoreParens();
3847
3848 while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3849 if (ICE->getCastKind() == CK_LValueToRValue ||
3850 (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
3851 E = ICE->getSubExpr()->IgnoreParens();
3852 else
3853 break;
3854 }
3855
3856 if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
3857 if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
3858 if (Field->isBitField())
3859 return Field;
3860
3861 if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
3862 FieldDecl *Ivar = IvarRef->getDecl();
3863 if (Ivar->isBitField())
3864 return Ivar;
3865 }
3866
3867 if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
3868 if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
3869 if (Field->isBitField())
3870 return Field;
3871
3872 if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
3873 if (Expr *E = BD->getBinding())
3874 return E->getSourceBitField();
3875 }
3876
3877 if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
3878 if (BinOp->isAssignmentOp() && BinOp->getLHS())
3879 return BinOp->getLHS()->getSourceBitField();
3880
3881 if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
3882 return BinOp->getRHS()->getSourceBitField();
3883 }
3884
3885 if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
3886 if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
3887 return UnOp->getSubExpr()->getSourceBitField();
3888
3889 return nullptr;
3890}
3891
3892bool Expr::refersToVectorElement() const {
3893 // FIXME: Why do we not just look at the ObjectKind here?
3894 const Expr *E = this->IgnoreParens();
3895
3896 while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
3897 if (ICE->getValueKind() != VK_RValue &&
3898 ICE->getCastKind() == CK_NoOp)
3899 E = ICE->getSubExpr()->IgnoreParens();
3900 else
3901 break;
3902 }
3903
3904 if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
3905 return ASE->getBase()->getType()->isVectorType();
3906
3907 if (isa<ExtVectorElementExpr>(E))
3908 return true;
3909
3910 if (auto *DRE = dyn_cast<DeclRefExpr>(E))
3911 if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
3912 if (auto *E = BD->getBinding())
3913 return E->refersToVectorElement();
3914
3915 return false;
3916}
3917
3918bool Expr::refersToGlobalRegisterVar() const {
3919 const Expr *E = this->IgnoreParenImpCasts();
3920
3921 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
3922 if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
3923 if (VD->getStorageClass() == SC_Register &&
3924 VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
3925 return true;
3926
3927 return false;
3928}
3929
3930bool Expr::isSameComparisonOperand(const Expr* E1, const Expr* E2) {
3931 E1 = E1->IgnoreParens();
3932 E2 = E2->IgnoreParens();
3933
3934 if (E1->getStmtClass() != E2->getStmtClass())
3935 return false;
3936
3937 switch (E1->getStmtClass()) {
3938 default:
3939 return false;
3940 case CXXThisExprClass:
3941 return true;
3942 case DeclRefExprClass: {
3943 // DeclRefExpr without an ImplicitCastExpr can happen for integral
3944 // template parameters.
3945 const auto *DRE1 = cast<DeclRefExpr>(E1);
3946 const auto *DRE2 = cast<DeclRefExpr>(E2);
3947 return DRE1->isRValue() && DRE2->isRValue() &&
3948 DRE1->getDecl() == DRE2->getDecl();
3949 }
3950 case ImplicitCastExprClass: {
3951 // Peel off implicit casts.
3952 while (true) {
3953 const auto *ICE1 = dyn_cast<ImplicitCastExpr>(E1);
3954 const auto *ICE2 = dyn_cast<ImplicitCastExpr>(E2);
3955 if (!ICE1 || !ICE2)
3956 return false;
3957 if (ICE1->getCastKind() != ICE2->getCastKind())
3958 return false;
3959 E1 = ICE1->getSubExpr()->IgnoreParens();
3960 E2 = ICE2->getSubExpr()->IgnoreParens();
3961 // The final cast must be one of these types.
3962 if (ICE1->getCastKind() == CK_LValueToRValue ||
3963 ICE1->getCastKind() == CK_ArrayToPointerDecay ||
3964 ICE1->getCastKind() == CK_FunctionToPointerDecay) {
3965 break;
3966 }
3967 }
3968
3969 const auto *DRE1 = dyn_cast<DeclRefExpr>(E1);
3970 const auto *DRE2 = dyn_cast<DeclRefExpr>(E2);
3971 if (DRE1 && DRE2)
3972 return declaresSameEntity(DRE1->getDecl(), DRE2->getDecl());
3973
3974 const auto *Ivar1 = dyn_cast<ObjCIvarRefExpr>(E1);
3975 const auto *Ivar2 = dyn_cast<ObjCIvarRefExpr>(E2);
3976 if (Ivar1 && Ivar2) {
3977 return Ivar1->isFreeIvar() && Ivar2->isFreeIvar() &&
3978 declaresSameEntity(Ivar1->getDecl(), Ivar2->getDecl());
3979 }
3980
3981 const auto *Array1 = dyn_cast<ArraySubscriptExpr>(E1);
3982 const auto *Array2 = dyn_cast<ArraySubscriptExpr>(E2);
3983 if (Array1 && Array2) {
3984 if (!isSameComparisonOperand(Array1->getBase(), Array2->getBase()))
3985 return false;
3986
3987 auto Idx1 = Array1->getIdx();
3988 auto Idx2 = Array2->getIdx();
3989 const auto Integer1 = dyn_cast<IntegerLiteral>(Idx1);
3990 const auto Integer2 = dyn_cast<IntegerLiteral>(Idx2);
3991 if (Integer1 && Integer2) {
3992 if (!llvm::APInt::isSameValue(Integer1->getValue(),
3993 Integer2->getValue()))
3994 return false;
3995 } else {
3996 if (!isSameComparisonOperand(Idx1, Idx2))
3997 return false;
3998 }
3999
4000 return true;
4001 }
4002
4003 // Walk the MemberExpr chain.
4004 while (isa<MemberExpr>(E1) && isa<MemberExpr>(E2)) {
4005 const auto *ME1 = cast<MemberExpr>(E1);
4006 const auto *ME2 = cast<MemberExpr>(E2);
4007 if (!declaresSameEntity(ME1->getMemberDecl(), ME2->getMemberDecl()))
4008 return false;
4009 if (const auto *D = dyn_cast<VarDecl>(ME1->getMemberDecl()))
4010 if (D->isStaticDataMember())
4011 return true;
4012 E1 = ME1->getBase()->IgnoreParenImpCasts();
4013 E2 = ME2->getBase()->IgnoreParenImpCasts();
4014 }
4015
4016 if (isa<CXXThisExpr>(E1) && isa<CXXThisExpr>(E2))
4017 return true;
4018
4019 // A static member variable can end the MemberExpr chain with either
4020 // a MemberExpr or a DeclRefExpr.
4021 auto getAnyDecl = [](const Expr *E) -> const ValueDecl * {
4022 if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
4023 return DRE->getDecl();
4024 if (const auto *ME = dyn_cast<MemberExpr>(E))
4025 return ME->getMemberDecl();
4026 return nullptr;
4027 };
4028
4029 const ValueDecl *VD1 = getAnyDecl(E1);
4030 const ValueDecl *VD2 = getAnyDecl(E2);
4031 return declaresSameEntity(VD1, VD2);
4032 }
4033 }
4034}
4035
4036/// isArrow - Return true if the base expression is a pointer to vector,
4037/// return false if the base expression is a vector.
4038bool ExtVectorElementExpr::isArrow() const {
4039 return getBase()->getType()->isPointerType();
4040}
4041
4042unsigned ExtVectorElementExpr::getNumElements() const {
4043 if (const VectorType *VT = getType()->getAs<VectorType>())
4044 return VT->getNumElements();
4045 return 1;
4046}
4047
4048/// containsDuplicateElements - Return true if any element access is repeated.
4049bool ExtVectorElementExpr::containsDuplicateElements() const {
4050 // FIXME: Refactor this code to an accessor on the AST node which returns the
4051 // "type" of component access, and share with code below and in Sema.
4052 StringRef Comp = Accessor->getName();
4053
4054 // Halving swizzles do not contain duplicate elements.
4055 if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
4056 return false;
4057
4058 // Advance past s-char prefix on hex swizzles.
4059 if (Comp[0] == 's' || Comp[0] == 'S')
4060 Comp = Comp.substr(1);
4061
4062 for (unsigned i = 0, e = Comp.size(); i != e; ++i)
4063 if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
4064 return true;
4065
4066 return false;
4067}
4068
4069/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
4070void ExtVectorElementExpr::getEncodedElementAccess(
4071 SmallVectorImpl<uint32_t> &Elts) const {
4072 StringRef Comp = Accessor->getName();
4073 bool isNumericAccessor = false;
4074 if (Comp[0] == 's' || Comp[0] == 'S') {
4075 Comp = Comp.substr(1);
4076 isNumericAccessor = true;
4077 }
4078
4079 bool isHi = Comp == "hi";
4080 bool isLo = Comp == "lo";
4081 bool isEven = Comp == "even";
4082 bool isOdd = Comp == "odd";
4083
4084 for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
4085 uint64_t Index;
4086
4087 if (isHi)
4088 Index = e + i;
4089 else if (isLo)
4090 Index = i;
4091 else if (isEven)
4092 Index = 2 * i;
4093 else if (isOdd)
4094 Index = 2 * i + 1;
4095 else
4096 Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
4097
4098 Elts.push_back(Index);
4099 }
4100}
4101
4102ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
4103 QualType Type, SourceLocation BLoc,
4104 SourceLocation RP)
4105 : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
4106 Type->isDependentType(), Type->isDependentType(),
4107 Type->isInstantiationDependentType(),
4108 Type->containsUnexpandedParameterPack()),
4109 BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
4110{
4111 SubExprs = new (C) Stmt*[args.size()];
4112 for (unsigned i = 0; i != args.size(); i++) {
4113 addDependence(args[i]->getDependence());
4114 SubExprs[i] = args[i];
4115 }
4116}
4117
4118void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
4119 if (SubExprs) C.Deallocate(SubExprs);
4120
4121 this->NumExprs = Exprs.size();
4122 SubExprs = new (C) Stmt*[NumExprs];
4123 memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
4124}
4125
4126GenericSelectionExpr::GenericSelectionExpr(
4127 const ASTContext &, SourceLocation GenericLoc, Expr *ControllingExpr,
4128 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4129 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4130 bool ContainsUnexpandedParameterPack, unsigned ResultIndex)
4131 : Expr(GenericSelectionExprClass, AssocExprs[ResultIndex]->getType(),
4132 AssocExprs[ResultIndex]->getValueKind(),
4133 AssocExprs[ResultIndex]->getObjectKind(),
4134 AssocExprs[ResultIndex]->isTypeDependent(),
4135 AssocExprs[ResultIndex]->isValueDependent(),
4136 AssocExprs[ResultIndex]->isInstantiationDependent(),
4137 ContainsUnexpandedParameterPack),
4138 NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
4139 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
4140 assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4142, __PRETTY_FUNCTION__))
4141 "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4142, __PRETTY_FUNCTION__))
4142 " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4142, __PRETTY_FUNCTION__))
;
4143 assert(ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!")((ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!"
) ? static_cast<void> (0) : __assert_fail ("ResultIndex < NumAssocs && \"ResultIndex is out-of-bounds!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4143, __PRETTY_FUNCTION__))
;
4144
4145 GenericSelectionExprBits.GenericLoc = GenericLoc;
4146 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
4147 std::copy(AssocExprs.begin(), AssocExprs.end(),
4148 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
4149 std::copy(AssocTypes.begin(), AssocTypes.end(),
4150 getTrailingObjects<TypeSourceInfo *>());
4151}
4152
4153GenericSelectionExpr::GenericSelectionExpr(
4154 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4155 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4156 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4157 bool ContainsUnexpandedParameterPack)
4158 : Expr(GenericSelectionExprClass, Context.DependentTy, VK_RValue,
4159 OK_Ordinary,
4160 /*isTypeDependent=*/true,
4161 /*isValueDependent=*/true,
4162 /*isInstantiationDependent=*/true, ContainsUnexpandedParameterPack),
4163 NumAssocs(AssocExprs.size()), ResultIndex(ResultDependentIndex),
4164 DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
4165 assert(AssocTypes.size() == AssocExprs.size() &&((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4167, __PRETTY_FUNCTION__))
4166 "Must have the same number of association expressions"((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4167, __PRETTY_FUNCTION__))
4167 " and TypeSourceInfo!")((AssocTypes.size() == AssocExprs.size() && "Must have the same number of association expressions"
" and TypeSourceInfo!") ? static_cast<void> (0) : __assert_fail
("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4167, __PRETTY_FUNCTION__))
;
4168
4169 GenericSelectionExprBits.GenericLoc = GenericLoc;
4170 getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
4171 std::copy(AssocExprs.begin(), AssocExprs.end(),
4172 getTrailingObjects<Stmt *>() + AssocExprStartIndex);
4173 std::copy(AssocTypes.begin(), AssocTypes.end(),
4174 getTrailingObjects<TypeSourceInfo *>());
4175}
4176
4177GenericSelectionExpr::GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs)
4178 : Expr(GenericSelectionExprClass, Empty), NumAssocs(NumAssocs) {}
4179
4180GenericSelectionExpr *GenericSelectionExpr::Create(
4181 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4182 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4183 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4184 bool ContainsUnexpandedParameterPack, unsigned ResultIndex) {
4185 unsigned NumAssocs = AssocExprs.size();
4186 void *Mem = Context.Allocate(
4187 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4188 alignof(GenericSelectionExpr));
4189 return new (Mem) GenericSelectionExpr(
4190 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
4191 RParenLoc, ContainsUnexpandedParameterPack, ResultIndex);
4192}
4193
4194GenericSelectionExpr *GenericSelectionExpr::Create(
4195 const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
4196 ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
4197 SourceLocation DefaultLoc, SourceLocation RParenLoc,
4198 bool ContainsUnexpandedParameterPack) {
4199 unsigned NumAssocs = AssocExprs.size();
4200 void *Mem = Context.Allocate(
4201 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4202 alignof(GenericSelectionExpr));
4203 return new (Mem) GenericSelectionExpr(
4204 Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
4205 RParenLoc, ContainsUnexpandedParameterPack);
4206}
4207
4208GenericSelectionExpr *
4209GenericSelectionExpr::CreateEmpty(const ASTContext &Context,
4210 unsigned NumAssocs) {
4211 void *Mem = Context.Allocate(
4212 totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
4213 alignof(GenericSelectionExpr));
4214 return new (Mem) GenericSelectionExpr(EmptyShell(), NumAssocs);
4215}
4216
4217//===----------------------------------------------------------------------===//
4218// DesignatedInitExpr
4219//===----------------------------------------------------------------------===//
4220
4221IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
4222 assert(Kind == FieldDesignator && "Only valid on a field designator")((Kind == FieldDesignator && "Only valid on a field designator"
) ? static_cast<void> (0) : __assert_fail ("Kind == FieldDesignator && \"Only valid on a field designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4222, __PRETTY_FUNCTION__))
;
4223 if (Field.NameOrField & 0x01)
4224 return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
4225 else
4226 return getField()->getIdentifier();
4227}
4228
4229DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
4230 llvm::ArrayRef<Designator> Designators,
4231 SourceLocation EqualOrColonLoc,
4232 bool GNUSyntax,
4233 ArrayRef<Expr*> IndexExprs,
4234 Expr *Init)
4235 : Expr(DesignatedInitExprClass, Ty,
4236 Init->getValueKind(), Init->getObjectKind(),
4237 Init->isTypeDependent(), Init->isValueDependent(),
4238 Init->isInstantiationDependent(),
4239 Init->containsUnexpandedParameterPack()),
4240 EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
4241 NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
4242 this->Designators = new (C) Designator[NumDesignators];
4243
4244 // Record the initializer itself.
4245 child_iterator Child = child_begin();
4246 *Child++ = Init;
4247
4248 // Copy the designators and their subexpressions, computing
4249 // value-dependence along the way.
4250 unsigned IndexIdx = 0;
4251 for (unsigned I = 0; I != NumDesignators; ++I) {
4252 this->Designators[I] = Designators[I];
4253
4254 if (this->Designators[I].isArrayDesignator()) {
4255 // Compute type- and value-dependence.
4256 Expr *Index = IndexExprs[IndexIdx];
4257
4258 // Propagate dependence flags.
4259 auto Deps = Index->getDependence();
4260 if (Deps & (ExprDependence::Type | ExprDependence::Value))
4261 Deps |= ExprDependence::Type | ExprDependence::Value;
4262 addDependence(Deps);
4263
4264 // Copy the index expressions into permanent storage.
4265 *Child++ = IndexExprs[IndexIdx++];
4266 } else if (this->Designators[I].isArrayRangeDesignator()) {
4267 // Compute type- and value-dependence.
4268 Expr *Start = IndexExprs[IndexIdx];
4269 Expr *End = IndexExprs[IndexIdx + 1];
4270
4271 auto Deps = Start->getDependence() | End->getDependence();
4272 if (Deps & (ExprDependence::Type | ExprDependence::Value))
4273 Deps |= ExprDependence::TypeValueInstantiation;
4274 addDependence(Deps);
4275
4276 // Copy the start/end expressions into permanent storage.
4277 *Child++ = IndexExprs[IndexIdx++];
4278 *Child++ = IndexExprs[IndexIdx++];
4279 }
4280 }
4281
4282 assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions")((IndexIdx == IndexExprs.size() && "Wrong number of index expressions"
) ? static_cast<void> (0) : __assert_fail ("IndexIdx == IndexExprs.size() && \"Wrong number of index expressions\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4282, __PRETTY_FUNCTION__))
;
4283}
4284
4285DesignatedInitExpr *
4286DesignatedInitExpr::Create(const ASTContext &C,
4287 llvm::ArrayRef<Designator> Designators,
4288 ArrayRef<Expr*> IndexExprs,
4289 SourceLocation ColonOrEqualLoc,
4290 bool UsesColonSyntax, Expr *Init) {
4291 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
4292 alignof(DesignatedInitExpr));
4293 return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
4294 ColonOrEqualLoc, UsesColonSyntax,
4295 IndexExprs, Init);
4296}
4297
4298DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
4299 unsigned NumIndexExprs) {
4300 void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
4301 alignof(DesignatedInitExpr));
4302 return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
4303}
4304
4305void DesignatedInitExpr::setDesignators(const ASTContext &C,
4306 const Designator *Desigs,
4307 unsigned NumDesigs) {
4308 Designators = new (C) Designator[NumDesigs];
4309 NumDesignators = NumDesigs;
4310 for (unsigned I = 0; I != NumDesigs; ++I)
4311 Designators[I] = Desigs[I];
4312}
4313
4314SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
4315 DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
4316 if (size() == 1)
4317 return DIE->getDesignator(0)->getSourceRange();
4318 return SourceRange(DIE->getDesignator(0)->getBeginLoc(),
4319 DIE->getDesignator(size() - 1)->getEndLoc());
4320}
4321
4322SourceLocation DesignatedInitExpr::getBeginLoc() const {
4323 SourceLocation StartLoc;
4324 auto *DIE = const_cast<DesignatedInitExpr *>(this);
4325 Designator &First = *DIE->getDesignator(0);
4326 if (First.isFieldDesignator()) {
4327 if (GNUSyntax)
4328 StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
4329 else
4330 StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
4331 } else
4332 StartLoc =
4333 SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
4334 return StartLoc;
4335}
4336
4337SourceLocation DesignatedInitExpr::getEndLoc() const {
4338 return getInit()->getEndLoc();
4339}
4340
4341Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
4342 assert(D.Kind == Designator::ArrayDesignator && "Requires array designator")((D.Kind == Designator::ArrayDesignator && "Requires array designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayDesignator && \"Requires array designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4342, __PRETTY_FUNCTION__))
;
4343 return getSubExpr(D.ArrayOrRange.Index + 1);
4344}
4345
4346Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
4347 assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4348, __PRETTY_FUNCTION__))
4348 "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4348, __PRETTY_FUNCTION__))
;
4349 return getSubExpr(D.ArrayOrRange.Index + 1);
4350}
4351
4352Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
4353 assert(D.Kind == Designator::ArrayRangeDesignator &&((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4354, __PRETTY_FUNCTION__))
4354 "Requires array range designator")((D.Kind == Designator::ArrayRangeDesignator && "Requires array range designator"
) ? static_cast<void> (0) : __assert_fail ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4354, __PRETTY_FUNCTION__))
;
4355 return getSubExpr(D.ArrayOrRange.Index + 2);
4356}
4357
4358/// Replaces the designator at index @p Idx with the series
4359/// of designators in [First, Last).
4360void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
4361 const Designator *First,
4362 const Designator *Last) {
4363 unsigned NumNewDesignators = Last - First;
4364 if (NumNewDesignators == 0) {
4365 std::copy_backward(Designators + Idx + 1,
4366 Designators + NumDesignators,
4367 Designators + Idx);
4368 --NumNewDesignators;
4369 return;
4370 } else if (NumNewDesignators == 1) {
4371 Designators[Idx] = *First;
4372 return;
4373 }
4374
4375 Designator *NewDesignators
4376 = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
4377 std::copy(Designators, Designators + Idx, NewDesignators);
4378 std::copy(First, Last, NewDesignators + Idx);
4379 std::copy(Designators + Idx + 1, Designators + NumDesignators,
4380 NewDesignators + Idx + NumNewDesignators);
4381 Designators = NewDesignators;
4382 NumDesignators = NumDesignators - 1 + NumNewDesignators;
4383}
4384
4385DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
4386 SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
4387 : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
4388 OK_Ordinary, false, false, false, false) {
4389 BaseAndUpdaterExprs[0] = baseExpr;
4390
4391 InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
4392 ILE->setType(baseExpr->getType());
4393 BaseAndUpdaterExprs[1] = ILE;
4394}
4395
4396SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
4397 return getBase()->getBeginLoc();
4398}
4399
4400SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
4401 return getBase()->getEndLoc();
4402}
4403
4404ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs,
4405 SourceLocation RParenLoc)
4406 : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
4407 false, false),
4408 LParenLoc(LParenLoc), RParenLoc(RParenLoc) {
4409 ParenListExprBits.NumExprs = Exprs.size();
4410
4411 for (unsigned I = 0, N = Exprs.size(); I != N; ++I) {
4412 addDependence(Exprs[I]->getDependence());
4413 getTrailingObjects<Stmt *>()[I] = Exprs[I];
4414 }
4415}
4416
4417ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs)
4418 : Expr(ParenListExprClass, Empty) {
4419 ParenListExprBits.NumExprs = NumExprs;
4420}
4421
4422ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx,
4423 SourceLocation LParenLoc,
4424 ArrayRef<Expr *> Exprs,
4425 SourceLocation RParenLoc) {
4426 void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()),
4427 alignof(ParenListExpr));
4428 return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc);
4429}
4430
4431ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx,
4432 unsigned NumExprs) {
4433 void *Mem =
4434 Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr));
4435 return new (Mem) ParenListExpr(EmptyShell(), NumExprs);
4436}
4437
4438const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
4439 if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
4440 e = ewc->getSubExpr();
4441 if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
4442 e = m->getSubExpr();
4443 e = cast<CXXConstructExpr>(e)->getArg(0);
4444 while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
4445 e = ice->getSubExpr();
4446 return cast<OpaqueValueExpr>(e);
4447}
4448
4449PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
4450 EmptyShell sh,
4451 unsigned numSemanticExprs) {
4452 void *buffer =
4453 Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
4454 alignof(PseudoObjectExpr));
4455 return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4456}
4457
4458PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
4459 : Expr(PseudoObjectExprClass, shell) {
4460 PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4461}
4462
4463PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
4464 ArrayRef<Expr*> semantics,
4465 unsigned resultIndex) {
4466 assert(syntax && "no syntactic expression!")((syntax && "no syntactic expression!") ? static_cast
<void> (0) : __assert_fail ("syntax && \"no syntactic expression!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4466, __PRETTY_FUNCTION__))
;
4467 assert(semantics.size() && "no semantic expressions!")((semantics.size() && "no semantic expressions!") ? static_cast
<void> (0) : __assert_fail ("semantics.size() && \"no semantic expressions!\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4467, __PRETTY_FUNCTION__))
;
4468
4469 QualType type;
4470 ExprValueKind VK;
4471 if (resultIndex == NoResult) {
4472 type = C.VoidTy;
4473 VK = VK_RValue;
4474 } else {
4475 assert(resultIndex < semantics.size())((resultIndex < semantics.size()) ? static_cast<void>
(0) : __assert_fail ("resultIndex < semantics.size()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4475, __PRETTY_FUNCTION__))
;
4476 type = semantics[resultIndex]->getType();
4477 VK = semantics[resultIndex]->getValueKind();
4478 assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary)((semantics[resultIndex]->getObjectKind() == OK_Ordinary) ?
static_cast<void> (0) : __assert_fail ("semantics[resultIndex]->getObjectKind() == OK_Ordinary"
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4478, __PRETTY_FUNCTION__))
;
4479 }
4480
4481 void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
4482 alignof(PseudoObjectExpr));
4483 return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
4484 resultIndex);
4485}
4486
4487PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
4488 Expr *syntax, ArrayRef<Expr*> semantics,
4489 unsigned resultIndex)
4490 : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
4491 /*filled in at end of ctor*/ false, false, false, false) {
4492 PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
4493 PseudoObjectExprBits.ResultIndex = resultIndex + 1;
4494
4495 for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
4496 Expr *E = (i == 0 ? syntax : semantics[i-1]);
4497 getSubExprsBuffer()[i] = E;
4498
4499 addDependence(E->getDependence());
4500
4501 if (isa<OpaqueValueExpr>(E))
4502 assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4504, __PRETTY_FUNCTION__))
4503 "opaque-value semantic expressions for pseudo-object "((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4504, __PRETTY_FUNCTION__))
4504 "operations must have sources")((cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr
&& "opaque-value semantic expressions for pseudo-object "
"operations must have sources") ? static_cast<void> (0
) : __assert_fail ("cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4504, __PRETTY_FUNCTION__))
;
4505 }
4506}
4507
4508//===----------------------------------------------------------------------===//
4509// Child Iterators for iterating over subexpressions/substatements
4510//===----------------------------------------------------------------------===//
4511
4512// UnaryExprOrTypeTraitExpr
4513Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
4514 const_child_range CCR =
4515 const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
4516 return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4517}
4518
4519Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
4520 // If this is of a type and the type is a VLA type (and not a typedef), the
4521 // size expression of the VLA needs to be treated as an executable expression.
4522 // Why isn't this weirdness documented better in StmtIterator?
4523 if (isArgumentType()) {
4524 if (const VariableArrayType *T =
4525 dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
4526 return const_child_range(const_child_iterator(T), const_child_iterator());
4527 return const_child_range(const_child_iterator(), const_child_iterator());
4528 }
4529 return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4530}
4531
4532AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
4533 QualType t, AtomicOp op, SourceLocation RP)
4534 : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
4535 false, false, false, false),
4536 NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
4537{
4538 assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions")((args.size() == getNumSubExprs(op) && "wrong number of subexpressions"
) ? static_cast<void> (0) : __assert_fail ("args.size() == getNumSubExprs(op) && \"wrong number of subexpressions\""
, "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4538, __PRETTY_FUNCTION__))
;
4539 for (unsigned i = 0; i != args.size(); i++) {
4540 addDependence(args[i]->getDependence());
4541 SubExprs[i] = args[i];
4542 }
4543}
4544
4545unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
4546 switch (Op) {
4547 case AO__c11_atomic_init:
4548 case AO__opencl_atomic_init:
4549 case AO__c11_atomic_load:
4550 case AO__atomic_load_n:
4551 return 2;
4552
4553 case AO__opencl_atomic_load:
4554 case AO__c11_atomic_store:
4555 case AO__c11_atomic_exchange:
4556 case AO__atomic_load:
4557 case AO__atomic_store:
4558 case AO__atomic_store_n:
4559 case AO__atomic_exchange_n:
4560 case AO__c11_atomic_fetch_add:
4561 case AO__c11_atomic_fetch_sub:
4562 case AO__c11_atomic_fetch_and:
4563 case AO__c11_atomic_fetch_or:
4564 case AO__c11_atomic_fetch_xor:
4565 case AO__c11_atomic_fetch_max:
4566 case AO__c11_atomic_fetch_min:
4567 case AO__atomic_fetch_add:
4568 case AO__atomic_fetch_sub:
4569 case AO__atomic_fetch_and:
4570 case AO__atomic_fetch_or:
4571 case AO__atomic_fetch_xor:
4572 case AO__atomic_fetch_nand:
4573 case AO__atomic_add_fetch:
4574 case AO__atomic_sub_fetch:
4575 case AO__atomic_and_fetch:
4576 case AO__atomic_or_fetch:
4577 case AO__atomic_xor_fetch:
4578 case AO__atomic_nand_fetch:
4579 case AO__atomic_min_fetch:
4580 case AO__atomic_max_fetch:
4581 case AO__atomic_fetch_min:
4582 case AO__atomic_fetch_max:
4583 return 3;
4584
4585 case AO__opencl_atomic_store:
4586 case AO__opencl_atomic_exchange:
4587 case AO__opencl_atomic_fetch_add:
4588 case AO__opencl_atomic_fetch_sub:
4589 case AO__opencl_atomic_fetch_and:
4590 case AO__opencl_atomic_fetch_or:
4591 case AO__opencl_atomic_fetch_xor:
4592 case AO__opencl_atomic_fetch_min:
4593 case AO__opencl_atomic_fetch_max:
4594 case AO__atomic_exchange:
4595 return 4;
4596
4597 case AO__c11_atomic_compare_exchange_strong:
4598 case AO__c11_atomic_compare_exchange_weak:
4599 return 5;
4600
4601 case AO__opencl_atomic_compare_exchange_strong:
4602 case AO__opencl_atomic_compare_exchange_weak:
4603 case AO__atomic_compare_exchange:
4604 case AO__atomic_compare_exchange_n:
4605 return 6;
4606 }
4607 llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4607)
;
4608}
4609
4610QualType AtomicExpr::getValueType() const {
4611 auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
4612 if (auto AT = T->getAs<AtomicType>())
4613 return AT->getValueType();
4614 return T;
4615}
4616
4617QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
4618 unsigned ArraySectionCount = 0;
4619 while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
4620 Base = OASE->getBase();
4621 ++ArraySectionCount;
4622 }
4623 while (auto *ASE =
4624 dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
4625 Base = ASE->getBase();
4626 ++ArraySectionCount;
4627 }
4628 Base = Base->IgnoreParenImpCasts();
4629 auto OriginalTy = Base->getType();
4630 if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
4631 if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
4632 OriginalTy = PVD->getOriginalType().getNonReferenceType();
4633
4634 for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
4635 if (OriginalTy->isAnyPointerType())
4636 OriginalTy = OriginalTy->getPointeeType();
4637 else {
4638 assert (OriginalTy->isArrayType())((OriginalTy->isArrayType()) ? static_cast<void> (0)
: __assert_fail ("OriginalTy->isArrayType()", "/build/llvm-toolchain-snapshot-11~++20200309111110+2c36c23f347/clang/lib/AST/Expr.cpp"
, 4638, __PRETTY_FUNCTION__))
;
4639 OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
4640 }
4641 }
4642 return OriginalTy;
4643}

/usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/stl_iterator.h

1// Iterators -*- C++ -*-
2
3// Copyright (C) 2001-2016 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/*
26 *
27 * Copyright (c) 1994
28 * Hewlett-Packard Company
29 *
30 * Permission to use, copy, modify, distribute and sell this software
31 * and its documentation for any purpose is hereby granted without fee,
32 * provided that the above copyright notice appear in all copies and
33 * that both that copyright notice and this permission notice appear
34 * in supporting documentation. Hewlett-Packard Company makes no
35 * representations about the suitability of this software for any
36 * purpose. It is provided "as is" without express or implied warranty.
37 *
38 *
39 * Copyright (c) 1996-1998
40 * Silicon Graphics Computer Systems, Inc.
41 *
42 * Permission to use, copy, modify, distribute and sell this software
43 * and its documentation for any purpose is hereby granted without fee,
44 * provided that the above copyright notice appear in all copies and
45 * that both that copyright notice and this permission notice appear
46 * in supporting documentation. Silicon Graphics makes no
47 * representations about the suitability of this software for any
48 * purpose. It is provided "as is" without express or implied warranty.
49 */
50
51/** @file bits/stl_iterator.h
52 * This is an internal header file, included by other library headers.
53 * Do not attempt to use it directly. @headername{iterator}
54 *
55 * This file implements reverse_iterator, back_insert_iterator,
56 * front_insert_iterator, insert_iterator, __normal_iterator, and their
57 * supporting functions and overloaded operators.
58 */
59
60#ifndef _STL_ITERATOR_H1
61#define _STL_ITERATOR_H1 1
62
63#include <bits/cpp_type_traits.h>
64#include <ext/type_traits.h>
65#include <bits/move.h>
66#include <bits/ptr_traits.h>
67
68namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
69{
70_GLIBCXX_BEGIN_NAMESPACE_VERSION
71
72 /**
73 * @addtogroup iterators
74 * @{
75 */
76
77 // 24.4.1 Reverse iterators
78 /**
79 * Bidirectional and random access iterators have corresponding reverse
80 * %iterator adaptors that iterate through the data structure in the
81 * opposite direction. They have the same signatures as the corresponding
82 * iterators. The fundamental relation between a reverse %iterator and its
83 * corresponding %iterator @c i is established by the identity:
84 * @code
85 * &*(reverse_iterator(i)) == &*(i - 1)
86 * @endcode
87 *
88 * <em>This mapping is dictated by the fact that while there is always a
89 * pointer past the end of an array, there might not be a valid pointer
90 * before the beginning of an array.</em> [24.4.1]/1,2
91 *
92 * Reverse iterators can be tricky and surprising at first. Their
93 * semantics make sense, however, and the trickiness is a side effect of
94 * the requirement that the iterators must be safe.
95 */
96 template<typename _Iterator>
97 class reverse_iterator
98 : public iterator<typename iterator_traits<_Iterator>::iterator_category,
99 typename iterator_traits<_Iterator>::value_type,
100 typename iterator_traits<_Iterator>::difference_type,
101 typename iterator_traits<_Iterator>::pointer,
102 typename iterator_traits<_Iterator>::reference>
103 {
104 protected:
105 _Iterator current;
106
107 typedef iterator_traits<_Iterator> __traits_type;
108
109 public:
110 typedef _Iterator iterator_type;
111 typedef typename __traits_type::difference_type difference_type;
112 typedef typename __traits_type::pointer pointer;
113 typedef typename __traits_type::reference reference;
114
115 /**
116 * The default constructor value-initializes member @p current.
117 * If it is a pointer, that means it is zero-initialized.
118 */
119 // _GLIBCXX_RESOLVE_LIB_DEFECTS
120 // 235 No specification of default ctor for reverse_iterator
121 reverse_iterator() : current() { }
122
123 /**
124 * This %iterator will move in the opposite direction that @p x does.
125 */
126 explicit
127 reverse_iterator(iterator_type __x) : current(__x) { }
128
129 /**
130 * The copy constructor is normal.
131 */
132 reverse_iterator(const reverse_iterator& __x)
133 : current(__x.current) { }
134
135 /**
136 * A %reverse_iterator across other types can be copied if the
137 * underlying %iterator can be converted to the type of @c current.
138 */
139 template<typename _Iter>
140 reverse_iterator(const reverse_iterator<_Iter>& __x)
141 : current(__x.base()) { }
142
143 /**
144 * @return @c current, the %iterator used for underlying work.
145 */
146 iterator_type
147 base() const
148 { return current; }
149
150 /**
151 * @return A reference to the value at @c --current
152 *
153 * This requires that @c --current is dereferenceable.
154 *
155 * @warning This implementation requires that for an iterator of the
156 * underlying iterator type, @c x, a reference obtained by
157 * @c *x remains valid after @c x has been modified or
158 * destroyed. This is a bug: http://gcc.gnu.org/PR51823
159 */
160 reference
161 operator*() const
162 {
163 _Iterator __tmp = current;
164 return *--__tmp;
165 }
166
167 /**
168 * @return A pointer to the value at @c --current
169 *
170 * This requires that @c --current is dereferenceable.
171 */
172 pointer
173 operator->() const
174 { return &(operator*()); }
175
176 /**
177 * @return @c *this
178 *
179 * Decrements the underlying iterator.
180 */
181 reverse_iterator&
182 operator++()
183 {
184 --current;
185 return *this;
186 }
187
188 /**
189 * @return The original value of @c *this
190 *
191 * Decrements the underlying iterator.
192 */
193 reverse_iterator
194 operator++(int)
195 {
196 reverse_iterator __tmp = *this;
197 --current;
198 return __tmp;
199 }
200
201 /**
202 * @return @c *this
203 *
204 * Increments the underlying iterator.
205 */
206 reverse_iterator&
207 operator--()
208 {
209 ++current;
210 return *this;
211 }
212
213 /**
214 * @return A reverse_iterator with the previous value of @c *this
215 *
216 * Increments the underlying iterator.
217 */
218 reverse_iterator
219 operator--(int)
220 {
221 reverse_iterator __tmp = *this;
222 ++current;
223 return __tmp;
224 }
225
226 /**
227 * @return A reverse_iterator that refers to @c current - @a __n
228 *
229 * The underlying iterator must be a Random Access Iterator.
230 */
231 reverse_iterator
232 operator+(difference_type __n) const
233 { return reverse_iterator(current - __n); }
234
235 /**
236 * @return *this
237 *
238 * Moves the underlying iterator backwards @a __n steps.
239 * The underlying iterator must be a Random Access Iterator.
240 */
241 reverse_iterator&
242 operator+=(difference_type __n)
243 {
244 current -= __n;
245 return *this;
246 }
247
248 /**
249 * @return A reverse_iterator that refers to @c current - @a __n
250 *
251 * The underlying iterator must be a Random Access Iterator.
252 */
253 reverse_iterator
254 operator-(difference_type __n) const
255 { return reverse_iterator(current + __n); }
256
257 /**
258 * @return *this
259 *
260 * Moves the underlying iterator forwards @a __n steps.
261 * The underlying iterator must be a Random Access Iterator.
262 */
263 reverse_iterator&
264 operator-=(difference_type __n)
265 {
266 current += __n;
267 return *this;
268 }
269
270 /**
271 * @return The value at @c current - @a __n - 1
272 *
273 * The underlying iterator must be a Random Access Iterator.
274 */
275 reference
276 operator[](difference_type __n) const
277 { return *(*this + __n); }
278 };
279
280 //@{
281 /**
282 * @param __x A %reverse_iterator.
283 * @param __y A %reverse_iterator.
284 * @return A simple bool.
285 *
286 * Reverse iterators forward many operations to their underlying base()
287 * iterators. Others are implemented in terms of one another.
288 *
289 */
290 template<typename _Iterator>
291 inline bool
292 operator==(const reverse_iterator<_Iterator>& __x,
293 const reverse_iterator<_Iterator>& __y)
294 { return __x.base() == __y.base(); }
23
Assuming the condition is true
24
Returning the value 1, which participates in a condition later
295
296 template<typename _Iterator>
297 inline bool
298 operator<(const reverse_iterator<_Iterator>& __x,
299 const reverse_iterator<_Iterator>& __y)
300 { return __y.base() < __x.base(); }
301
302 template<typename _Iterator>
303 inline bool
304 operator!=(const reverse_iterator<_Iterator>& __x,
305 const reverse_iterator<_Iterator>& __y)
306 { return !(__x == __y); }
22
Calling 'operator==<const clang::ClassTemplateSpecializationDecl **>'
25
Returning from 'operator==<const clang::ClassTemplateSpecializationDecl **>'
26
Returning zero, which participates in a condition later
307
308 template<typename _Iterator>
309 inline bool
310 operator>(const reverse_iterator<_Iterator>& __x,
311 const reverse_iterator<_Iterator>& __y)
312 { return __y < __x; }
313
314 template<typename _Iterator>
315 inline bool
316 operator<=(const reverse_iterator<_Iterator>& __x,
317 const reverse_iterator<_Iterator>& __y)
318 { return !(__y < __x); }
319
320 template<typename _Iterator>
321 inline bool
322 operator>=(const reverse_iterator<_Iterator>& __x,
323 const reverse_iterator<_Iterator>& __y)
324 { return !(__x < __y); }
325
326 template<typename _Iterator>
327#if __cplusplus201402L < 201103L
328 inline typename reverse_iterator<_Iterator>::difference_type
329 operator-(const reverse_iterator<_Iterator>& __x,
330 const reverse_iterator<_Iterator>& __y)
331#else
332 inline auto
333 operator-(const reverse_iterator<_Iterator>& __x,
334 const reverse_iterator<_Iterator>& __y)
335 -> decltype(__x.base() - __y.base())
336#endif
337 { return __y.base() - __x.base(); }
338
339 template<typename _Iterator>
340 inline reverse_iterator<_Iterator>
341 operator+(typename reverse_iterator<_Iterator>::difference_type __n,
342 const reverse_iterator<_Iterator>& __x)
343 { return reverse_iterator<_Iterator>(__x.base() - __n); }
344
345 // _GLIBCXX_RESOLVE_LIB_DEFECTS
346 // DR 280. Comparison of reverse_iterator to const reverse_iterator.
347 template<typename _IteratorL, typename _IteratorR>
348 inline bool
349 operator==(const reverse_iterator<_IteratorL>& __x,
350 const reverse_iterator<_IteratorR>& __y)
351 { return __x.base() == __y.base(); }
352
353 template<typename _IteratorL, typename _IteratorR>
354 inline bool
355 operator<(const reverse_iterator<_IteratorL>& __x,
356 const reverse_iterator<_IteratorR>& __y)
357 { return __y.base() < __x.base(); }
358
359 template<typename _IteratorL, typename _IteratorR>
360 inline bool
361 operator!=(const reverse_iterator<_IteratorL>& __x,
362 const reverse_iterator<_IteratorR>& __y)
363 { return !(__x == __y); }
364
365 template<typename _IteratorL, typename _IteratorR>
366 inline bool
367 operator>(const reverse_iterator<_IteratorL>& __x,
368 const reverse_iterator<_IteratorR>& __y)
369 { return __y < __x; }
370
371 template<typename _IteratorL, typename _IteratorR>
372 inline bool
373 operator<=(const reverse_iterator<_IteratorL>& __x,
374 const reverse_iterator<_IteratorR>& __y)
375 { return !(__y < __x); }
376
377 template<typename _IteratorL, typename _IteratorR>
378 inline bool
379 operator>=(const reverse_iterator<_IteratorL>& __x,
380 const reverse_iterator<_IteratorR>& __y)
381 { return !(__x < __y); }
382
383 template<typename _IteratorL, typename _IteratorR>
384#if __cplusplus201402L >= 201103L
385 // DR 685.
386 inline auto
387 operator-(const reverse_iterator<_IteratorL>& __x,
388 const reverse_iterator<_IteratorR>& __y)
389 -> decltype(__y.base() - __x.base())
390#else
391 inline typename reverse_iterator<_IteratorL>::difference_type
392 operator-(const reverse_iterator<_IteratorL>& __x,
393 const reverse_iterator<_IteratorR>& __y)
394#endif
395 { return __y.base() - __x.base(); }
396 //@}
397
398#if __cplusplus201402L >= 201103L
399 // Same as C++14 make_reverse_iterator but used in C++03 mode too.
400 template<typename _Iterator>
401 inline reverse_iterator<_Iterator>
402 __make_reverse_iterator(_Iterator __i)
403 { return reverse_iterator<_Iterator>(__i); }
404
405# if __cplusplus201402L > 201103L
406# define __cpp_lib_make_reverse_iterator201402 201402
407
408 // _GLIBCXX_RESOLVE_LIB_DEFECTS
409 // DR 2285. make_reverse_iterator
410 /// Generator function for reverse_iterator.
411 template<typename _Iterator>
412 inline reverse_iterator<_Iterator>
413 make_reverse_iterator(_Iterator __i)
414 { return reverse_iterator<_Iterator>(__i); }
415# endif
416#endif
417
418#if __cplusplus201402L >= 201103L
419 template<typename _Iterator>
420 auto
421 __niter_base(reverse_iterator<_Iterator> __it)
422 -> decltype(__make_reverse_iterator(__niter_base(__it.base())))
423 { return __make_reverse_iterator(__niter_base(__it.base())); }
424
425 template<typename _Iterator>
426 struct __is_move_iterator<reverse_iterator<_Iterator> >
427 : __is_move_iterator<_Iterator>
428 { };
429
430 template<typename _Iterator>
431 auto
432 __miter_base(reverse_iterator<_Iterator> __it)
433 -> decltype(__make_reverse_iterator(__miter_base(__it.base())))
434 { return __make_reverse_iterator(__miter_base(__it.base())); }
435#endif
436
437 // 24.4.2.2.1 back_insert_iterator
438 /**
439 * @brief Turns assignment into insertion.
440 *
441 * These are output iterators, constructed from a container-of-T.
442 * Assigning a T to the iterator appends it to the container using
443 * push_back.
444 *
445 * Tip: Using the back_inserter function to create these iterators can
446 * save typing.
447 */
448 template<typename _Container>
449 class back_insert_iterator
450 : public iterator<output_iterator_tag, void, void, void, void>
451 {
452 protected:
453 _Container* container;
454
455 public:
456 /// A nested typedef for the type of whatever container you used.
457 typedef _Container container_type;
458
459 /// The only way to create this %iterator is with a container.
460 explicit
461 back_insert_iterator(_Container& __x)
462 : container(std::__addressof(__x)) { }
463
464 /**
465 * @param __value An instance of whatever type
466 * container_type::const_reference is; presumably a
467 * reference-to-const T for container<T>.
468 * @return This %iterator, for chained operations.
469 *
470 * This kind of %iterator doesn't really have a @a position in the
471 * container (you can think of the position as being permanently at
472 * the end, if you like). Assigning a value to the %iterator will
473 * always append the value to the end of the container.
474 */
475#if __cplusplus201402L < 201103L
476 back_insert_iterator&
477 operator=(typename _Container::const_reference __value)
478 {
479 container->push_back(__value);
480 return *this;
481 }
482#else
483 back_insert_iterator&
484 operator=(const typename _Container::value_type& __value)
485 {
486 container->push_back(__value);
487 return *this;
488 }
489
490 back_insert_iterator&
491 operator=(typename _Container::value_type&& __value)
492 {
493 container->push_back(std::move(__value));
494 return *this;
495 }
496#endif
497
498 /// Simply returns *this.
499 back_insert_iterator&
500 operator*()
501 { return *this; }
502
503 /// Simply returns *this. (This %iterator does not @a move.)
504 back_insert_iterator&
505 operator++()
506 { return *this; }
507
508 /// Simply returns *this. (This %iterator does not @a move.)
509 back_insert_iterator
510 operator++(int)
511 { return *this; }
512 };
513
514 /**
515 * @param __x A container of arbitrary type.
516 * @return An instance of back_insert_iterator working on @p __x.
517 *
518 * This wrapper function helps in creating back_insert_iterator instances.
519 * Typing the name of the %iterator requires knowing the precise full
520 * type of the container, which can be tedious and impedes generic
521 * programming. Using this function lets you take advantage of automatic
522 * template parameter deduction, making the compiler match the correct
523 * types for you.
524 */
525 template<typename _Container>
526 inline back_insert_iterator<_Container>
527 back_inserter(_Container& __x)
528 { return back_insert_iterator<_Container>(__x); }
529
530 /**
531 * @brief Turns assignment into insertion.
532 *
533 * These are output iterators, constructed from a container-of-T.
534 * Assigning a T to the iterator prepends it to the container using
535 * push_front.
536 *
537 * Tip: Using the front_inserter function to create these iterators can
538 * save typing.
539 */
540 template<typename _Container>
541 class front_insert_iterator
542 : public iterator<output_iterator_tag, void, void, void, void>
543 {
544 protected:
545 _Container* container;
546
547 public:
548 /// A nested typedef for the type of whatever container you used.
549 typedef _Container container_type;
550
551 /// The only way to create this %iterator is with a container.
552 explicit front_insert_iterator(_Container& __x)
553 : container(std::__addressof(__x)) { }
554
555 /**
556 * @param __value An instance of whatever type
557 * container_type::const_reference is; presumably a
558 * reference-to-const T for container<T>.
559 * @return This %iterator, for chained operations.
560 *
561 * This kind of %iterator doesn't really have a @a position in the
562 * container (you can think of the position as being permanently at
563 * the front, if you like). Assigning a value to the %iterator will
564 * always prepend the value to the front of the container.
565 */
566#if __cplusplus201402L < 201103L
567 front_insert_iterator&
568 operator=(typename _Container::const_reference __value)
569 {
570 container->push_front(__value);
571 return *this;
572 }
573#else
574 front_insert_iterator&
575 operator=(const typename _Container::value_type& __value)
576 {
577 container->push_front(__value);
578 return *this;
579 }
580
581 front_insert_iterator&
582 operator=(typename _Container::value_type&& __value)
583 {
584 container->push_front(std::move(__value));
585 return *this;
586 }
587#endif
588
589 /// Simply returns *this.
590 front_insert_iterator&
591 operator*()
592 { return *this; }
593
594 /// Simply returns *this. (This %iterator does not @a move.)
595 front_insert_iterator&
596 operator++()
597 { return *this; }
598
599 /// Simply returns *this. (This %iterator does not @a move.)
600 front_insert_iterator
601 operator++(int)
602 { return *this; }
603 };
604
605 /**
606 * @param __x A container of arbitrary type.
607 * @return An instance of front_insert_iterator working on @p x.
608 *
609 * This wrapper function helps in creating front_insert_iterator instances.
610 * Typing the name of the %iterator requires knowing the precise full
611 * type of the container, which can be tedious and impedes generic
612 * programming. Using this function lets you take advantage of automatic
613 * template parameter deduction, making the compiler match the correct
614 * types for you.
615 */
616 template<typename _Container>
617 inline front_insert_iterator<_Container>
618 front_inserter(_Container& __x)
619 { return front_insert_iterator<_Container>(__x); }
620
621 /**
622 * @brief Turns assignment into insertion.
623 *
624 * These are output iterators, constructed from a container-of-T.
625 * Assigning a T to the iterator inserts it in the container at the
626 * %iterator's position, rather than overwriting the value at that
627 * position.
628 *
629 * (Sequences will actually insert a @e copy of the value before the
630 * %iterator's position.)
631 *
632 * Tip: Using the inserter function to create these iterators can
633 * save typing.
634 */
635 template<typename _Container>
636 class insert_iterator
637 : public iterator<output_iterator_tag, void, void, void, void>
638 {
639 protected:
640 _Container* container;
641 typename _Container::iterator iter;
642
643 public:
644 /// A nested typedef for the type of whatever container you used.
645 typedef _Container container_type;
646
647 /**
648 * The only way to create this %iterator is with a container and an
649 * initial position (a normal %iterator into the container).
650 */
651 insert_iterator(_Container& __x, typename _Container::iterator __i)
652 : container(std::__addressof(__x)), iter(__i) {}
653
654 /**
655 * @param __value An instance of whatever type
656 * container_type::const_reference is; presumably a
657 * reference-to-const T for container<T>.
658 * @return This %iterator, for chained operations.
659 *
660 * This kind of %iterator maintains its own position in the
661 * container. Assigning a value to the %iterator will insert the
662 * value into the container at the place before the %iterator.
663 *
664 * The position is maintained such that subsequent assignments will
665 * insert values immediately after one another. For example,
666 * @code
667 * // vector v contains A and Z
668 *
669 * insert_iterator i (v, ++v.begin());
670 * i = 1;
671 * i = 2;
672 * i = 3;
673 *
674 * // vector v contains A, 1, 2, 3, and Z
675 * @endcode
676 */
677#if __cplusplus201402L < 201103L
678 insert_iterator&
679 operator=(typename _Container::const_reference __value)
680 {
681 iter = container->insert(iter, __value);
682 ++iter;
683 return *this;
684 }
685#else
686 insert_iterator&
687 operator=(const typename _Container::value_type& __value)
688 {
689 iter = container->insert(iter, __value);
690 ++iter;
691 return *this;
692 }
693
694 insert_iterator&
695 operator=(typename _Container::value_type&& __value)
696 {
697 iter = container->insert(iter, std::move(__value));
698 ++iter;
699 return *this;
700 }
701#endif
702
703 /// Simply returns *this.
704 insert_iterator&
705 operator*()
706 { return *this; }
707
708 /// Simply returns *this. (This %iterator does not @a move.)
709 insert_iterator&
710 operator++()
711 { return *this; }
712
713 /// Simply returns *this. (This %iterator does not @a move.)
714 insert_iterator&
715 operator++(int)
716 { return *this; }
717 };
718
719 /**
720 * @param __x A container of arbitrary type.
721 * @return An instance of insert_iterator working on @p __x.
722 *
723 * This wrapper function helps in creating insert_iterator instances.
724 * Typing the name of the %iterator requires knowing the precise full
725 * type of the container, which can be tedious and impedes generic
726 * programming. Using this function lets you take advantage of automatic
727 * template parameter deduction, making the compiler match the correct
728 * types for you.
729 */
730 template<typename _Container, typename _Iterator>
731 inline insert_iterator<_Container>
732 inserter(_Container& __x, _Iterator __i)
733 {
734 return insert_iterator<_Container>(__x,
735 typename _Container::iterator(__i));
736 }
737
738 // @} group iterators
739
740_GLIBCXX_END_NAMESPACE_VERSION
741} // namespace
742
743namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
744{
745_GLIBCXX_BEGIN_NAMESPACE_VERSION
746
747 // This iterator adapter is @a normal in the sense that it does not
748 // change the semantics of any of the operators of its iterator
749 // parameter. Its primary purpose is to convert an iterator that is
750 // not a class, e.g. a pointer, into an iterator that is a class.
751 // The _Container parameter exists solely so that different containers
752 // using this template can instantiate different types, even if the
753 // _Iterator parameter is the same.
754 using std::iterator_traits;
755 using std::iterator;
756 template<typename _Iterator, typename _Container>
757 class __normal_iterator
758 {
759 protected:
760 _Iterator _M_current;
761
762 typedef iterator_traits<_Iterator> __traits_type;
763
764 public:
765 typedef _Iterator iterator_type;
766 typedef typename __traits_type::iterator_category iterator_category;
767 typedef typename __traits_type::value_type value_type;
768 typedef typename __traits_type::difference_type difference_type;
769 typedef typename __traits_type::reference reference;
770 typedef typename __traits_type::pointer pointer;
771
772 _GLIBCXX_CONSTEXPRconstexpr __normal_iterator() _GLIBCXX_NOEXCEPTnoexcept
773 : _M_current(_Iterator()) { }
774
775 explicit
776 __normal_iterator(const _Iterator& __i) _GLIBCXX_NOEXCEPTnoexcept
777 : _M_current(__i) { }
778
779 // Allow iterator to const_iterator conversion
780 template<typename _Iter>
781 __normal_iterator(const __normal_iterator<_Iter,
782 typename __enable_if<
783 (std::__are_same<_Iter, typename _Container::pointer>::__value),
784 _Container>::__type>& __i) _GLIBCXX_NOEXCEPTnoexcept
785 : _M_current(__i.base()) { }
786
787 // Forward iterator requirements
788 reference
789 operator*() const _GLIBCXX_NOEXCEPTnoexcept
790 { return *_M_current; }
791
792 pointer
793 operator->() const _GLIBCXX_NOEXCEPTnoexcept
794 { return _M_current; }
795
796 __normal_iterator&
797 operator++() _GLIBCXX_NOEXCEPTnoexcept
798 {
799 ++_M_current;
800 return *this;
801 }
802
803 __normal_iterator
804 operator++(int) _GLIBCXX_NOEXCEPTnoexcept
805 { return __normal_iterator(_M_current++); }
806
807 // Bidirectional iterator requirements
808 __normal_iterator&
809 operator--() _GLIBCXX_NOEXCEPTnoexcept
810 {
811 --_M_current;
812 return *this;
813 }
814
815 __normal_iterator
816 operator--(int) _GLIBCXX_NOEXCEPTnoexcept
817 { return __normal_iterator(_M_current--); }
818
819 // Random access iterator requirements
820 reference
821 operator[](difference_type __n) const _GLIBCXX_NOEXCEPTnoexcept
822 { return _M_current[__n]; }
823
824 __normal_iterator&
825 operator+=(difference_type __n) _GLIBCXX_NOEXCEPTnoexcept
826 { _M_current += __n; return *this; }
827
828 __normal_iterator
829 operator+(difference_type __n) const _GLIBCXX_NOEXCEPTnoexcept
830 { return __normal_iterator(_M_current + __n); }
831
832 __normal_iterator&
833 operator-=(difference_type __n) _GLIBCXX_NOEXCEPTnoexcept
834 { _M_current -= __n; return *this; }
835
836 __normal_iterator
837 operator-(difference_type __n) const _GLIBCXX_NOEXCEPTnoexcept
838 { return __normal_iterator(_M_current - __n); }
839
840 const _Iterator&
841 base() const _GLIBCXX_NOEXCEPTnoexcept
842 { return _M_current; }
843 };
844
845 // Note: In what follows, the left- and right-hand-side iterators are
846 // allowed to vary in types (conceptually in cv-qualification) so that
847 // comparison between cv-qualified and non-cv-qualified iterators be
848 // valid. However, the greedy and unfriendly operators in std::rel_ops
849 // will make overload resolution ambiguous (when in scope) if we don't
850 // provide overloads whose operands are of the same type. Can someone
851 // remind me what generic programming is about? -- Gaby
852
853 // Forward iterator requirements
854 template<typename _IteratorL, typename _IteratorR, typename _Container>
855 inline bool
856 operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
857 const __normal_iterator<_IteratorR, _Container>& __rhs)
858 _GLIBCXX_NOEXCEPTnoexcept
859 { return __lhs.base() == __rhs.base(); }
860
861 template<typename _Iterator, typename _Container>
862 inline bool
863 operator==(const __normal_iterator<_Iterator, _Container>& __lhs,
864 const __normal_iterator<_Iterator, _Container>& __rhs)
865 _GLIBCXX_NOEXCEPTnoexcept
866 { return __lhs.base() == __rhs.base(); }
867
868 template<typename _IteratorL, typename _IteratorR, typename _Container>
869 inline bool
870 operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
871 const __normal_iterator<_IteratorR, _Container>& __rhs)
872 _GLIBCXX_NOEXCEPTnoexcept
873 { return __lhs.base() != __rhs.base(); }
874
875 template<typename _Iterator, typename _Container>
876 inline bool
877 operator!=(const __normal_iterator<_Iterator, _Container>& __lhs,
878 const __normal_iterator<_Iterator, _Container>& __rhs)
879 _GLIBCXX_NOEXCEPTnoexcept
880 { return __lhs.base() != __rhs.base(); }
881
882 // Random access iterator requirements
883 template<typename _IteratorL, typename _IteratorR, typename _Container>
884 inline bool
885 operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
886 const __normal_iterator<_IteratorR, _Container>& __rhs)
887 _GLIBCXX_NOEXCEPTnoexcept
888 { return __lhs.base() < __rhs.base(); }
889
890 template<typename _Iterator, typename _Container>
891 inline bool
892 operator<(const __normal_iterator<_Iterator, _Container>& __lhs,
893 const __normal_iterator<_Iterator, _Container>& __rhs)
894 _GLIBCXX_NOEXCEPTnoexcept
895 { return __lhs.base() < __rhs.base(); }
896
897 template<typename _IteratorL, typename _IteratorR, typename _Container>
898 inline bool
899 operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
900 const __normal_iterator<_IteratorR, _Container>& __rhs)
901 _GLIBCXX_NOEXCEPTnoexcept
902 { return __lhs.base() > __rhs.base(); }
903
904 template<typename _Iterator, typename _Container>
905 inline bool
906 operator>(const __normal_iterator<_Iterator, _Container>& __lhs,
907 const __normal_iterator<_Iterator, _Container>& __rhs)
908 _GLIBCXX_NOEXCEPTnoexcept
909 { return __lhs.base() > __rhs.base(); }
910
911 template<typename _IteratorL, typename _IteratorR, typename _Container>
912 inline bool
913 operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
914 const __normal_iterator<_IteratorR, _Container>& __rhs)
915 _GLIBCXX_NOEXCEPTnoexcept
916 { return __lhs.base() <= __rhs.base(); }
917
918 template<typename _Iterator, typename _Container>
919 inline bool
920 operator<=(const __normal_iterator<_Iterator, _Container>& __lhs,
921 const __normal_iterator<_Iterator, _Container>& __rhs)
922 _GLIBCXX_NOEXCEPTnoexcept
923 { return __lhs.base() <= __rhs.base(); }
924
925 template<typename _IteratorL, typename _IteratorR, typename _Container>
926 inline bool
927 operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
928 const __normal_iterator<_IteratorR, _Container>& __rhs)
929 _GLIBCXX_NOEXCEPTnoexcept
930 { return __lhs.base() >= __rhs.base(); }
931
932 template<typename _Iterator, typename _Container>
933 inline bool
934 operator>=(const __normal_iterator<_Iterator, _Container>& __lhs,
935 const __normal_iterator<_Iterator, _Container>& __rhs)
936 _GLIBCXX_NOEXCEPTnoexcept
937 { return __lhs.base() >= __rhs.base(); }
938
939 // _GLIBCXX_RESOLVE_LIB_DEFECTS
940 // According to the resolution of DR179 not only the various comparison
941 // operators but also operator- must accept mixed iterator/const_iterator
942 // parameters.
943 template<typename _IteratorL, typename _IteratorR, typename _Container>
944#if __cplusplus201402L >= 201103L
945 // DR 685.
946 inline auto
947 operator-(const __normal_iterator<_IteratorL, _Container>& __lhs,
948 const __normal_iterator<_IteratorR, _Container>& __rhs) noexcept
949 -> decltype(__lhs.base() - __rhs.base())
950#else
951 inline typename __normal_iterator<_IteratorL, _Container>::difference_type
952 operator-(const __normal_iterator<_IteratorL, _Container>& __lhs,
953 const __normal_iterator<_IteratorR, _Container>& __rhs)
954#endif
955 { return __lhs.base() - __rhs.base(); }
956
957 template<typename _Iterator, typename _Container>
958 inline typename __normal_iterator<_Iterator, _Container>::difference_type
959 operator-(const __normal_iterator<_Iterator, _Container>& __lhs,
960 const __normal_iterator<_Iterator, _Container>& __rhs)
961 _GLIBCXX_NOEXCEPTnoexcept
962 { return __lhs.base() - __rhs.base(); }
963
964 template<typename _Iterator, typename _Container>
965 inline __normal_iterator<_Iterator, _Container>
966 operator+(typename __normal_iterator<_Iterator, _Container>::difference_type
967 __n, const __normal_iterator<_Iterator, _Container>& __i)
968 _GLIBCXX_NOEXCEPTnoexcept
969 { return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
970
971_GLIBCXX_END_NAMESPACE_VERSION
972} // namespace
973
974namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
975{
976_GLIBCXX_BEGIN_NAMESPACE_VERSION
977
978 template<typename _Iterator, typename _Container>
979 _Iterator
980 __niter_base(__gnu_cxx::__normal_iterator<_Iterator, _Container> __it)
981 { return __it.base(); }
982
983_GLIBCXX_END_NAMESPACE_VERSION
984} // namespace
985
986#if __cplusplus201402L >= 201103L
987
988namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default")))
989{
990_GLIBCXX_BEGIN_NAMESPACE_VERSION
991
992 /**
993 * @addtogroup iterators
994 * @{
995 */
996
997 // 24.4.3 Move iterators
998 /**
999 * Class template move_iterator is an iterator adapter with the same
1000 * behavior as the underlying iterator except that its dereference
1001 * operator implicitly converts the value returned by the underlying
1002 * iterator's dereference operator to an rvalue reference. Some
1003 * generic algorithms can be called with move iterators to replace
1004 * copying with moving.
1005 */
1006 template<typename _Iterator>
1007 class move_iterator
1008 {
1009 protected:
1010 _Iterator _M_current;
1011
1012 typedef iterator_traits<_Iterator> __traits_type;
1013 typedef typename __traits_type::reference __base_ref;
1014
1015 public:
1016 typedef _Iterator iterator_type;
1017 typedef typename __traits_type::iterator_category iterator_category;
1018 typedef typename __traits_type::value_type value_type;
1019 typedef typename __traits_type::difference_type difference_type;
1020 // NB: DR 680.
1021 typedef _Iterator pointer;
1022 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1023 // 2106. move_iterator wrapping iterators returning prvalues
1024 typedef typename conditional<is_reference<__base_ref>::value,
1025 typename remove_reference<__base_ref>::type&&,
1026 __base_ref>::type reference;
1027
1028 move_iterator()
1029 : _M_current() { }
1030
1031 explicit
1032 move_iterator(iterator_type __i)
1033 : _M_current(__i) { }
1034
1035 template<typename _Iter>
1036 move_iterator(const move_iterator<_Iter>& __i)
1037 : _M_current(__i.base()) { }
1038
1039 iterator_type
1040 base() const
1041 { return _M_current; }
1042
1043 reference
1044 operator*() const
1045 { return static_cast<reference>(*_M_current); }
1046
1047 pointer
1048 operator->() const
1049 { return _M_current; }
1050
1051 move_iterator&
1052 operator++()
1053 {
1054 ++_M_current;
1055 return *this;
1056 }
1057
1058 move_iterator
1059 operator++(int)
1060 {
1061 move_iterator __tmp = *this;
1062 ++_M_current;
1063 return __tmp;
1064 }
1065
1066 move_iterator&
1067 operator--()
1068 {
1069 --_M_current;
1070 return *this;
1071 }
1072
1073 move_iterator
1074 operator--(int)
1075 {
1076 move_iterator __tmp = *this;
1077 --_M_current;
1078 return __tmp;
1079 }
1080
1081 move_iterator
1082 operator+(difference_type __n) const
1083 { return move_iterator(_M_current + __n); }
1084
1085 move_iterator&
1086 operator+=(difference_type __n)
1087 {
1088 _M_current += __n;
1089 return *