LLVM  15.0.0git
TGLexer.cpp
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1 //===- TGLexer.cpp - Lexer for TableGen -----------------------------------===//
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 // Implement the Lexer for TableGen.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "TGLexer.h"
14 #include "llvm/ADT/ArrayRef.h"
15 #include "llvm/ADT/StringSwitch.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/Config/config.h" // for strtoull()/strtoll() define
18 #include "llvm/Support/Compiler.h"
20 #include "llvm/Support/SourceMgr.h"
21 #include "llvm/TableGen/Error.h"
22 #include <algorithm>
23 #include <cctype>
24 #include <cerrno>
25 #include <cstdint>
26 #include <cstdio>
27 #include <cstdlib>
28 #include <cstring>
29 
30 using namespace llvm;
31 
32 namespace {
33 // A list of supported preprocessing directives with their
34 // internal token kinds and names.
35 struct {
37  const char *Word;
38 } PreprocessorDirs[] = {
39  { tgtok::Ifdef, "ifdef" },
40  { tgtok::Ifndef, "ifndef" },
41  { tgtok::Else, "else" },
42  { tgtok::Endif, "endif" },
43  { tgtok::Define, "define" }
44 };
45 } // end anonymous namespace
46 
48  CurBuffer = SrcMgr.getMainFileID();
49  CurBuf = SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer();
50  CurPtr = CurBuf.begin();
51  TokStart = nullptr;
52 
53  // Pretend that we enter the "top-level" include file.
54  PrepIncludeStack.push_back(
55  std::make_unique<std::vector<PreprocessorControlDesc>>());
56 
57  // Put all macros defined in the command line into the DefinedMacros set.
58  for (const std::string &MacroName : Macros)
59  DefinedMacros.insert(MacroName);
60 }
61 
63  return SMLoc::getFromPointer(TokStart);
64 }
65 
66 /// ReturnError - Set the error to the specified string at the specified
67 /// location. This is defined to always return tgtok::Error.
68 tgtok::TokKind TGLexer::ReturnError(SMLoc Loc, const Twine &Msg) {
69  PrintError(Loc, Msg);
70  return tgtok::Error;
71 }
72 
73 tgtok::TokKind TGLexer::ReturnError(const char *Loc, const Twine &Msg) {
74  return ReturnError(SMLoc::getFromPointer(Loc), Msg);
75 }
76 
77 bool TGLexer::processEOF() {
78  SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
79  if (ParentIncludeLoc != SMLoc()) {
80  // If prepExitInclude() detects a problem with the preprocessing
81  // control stack, it will return false. Pretend that we reached
82  // the final EOF and stop lexing more tokens by returning false
83  // to LexToken().
84  if (!prepExitInclude(false))
85  return false;
86 
87  CurBuffer = SrcMgr.FindBufferContainingLoc(ParentIncludeLoc);
88  CurBuf = SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer();
89  CurPtr = ParentIncludeLoc.getPointer();
90  // Make sure TokStart points into the parent file's buffer.
91  // LexToken() assigns to it before calling getNextChar(),
92  // so it is pointing into the included file now.
93  TokStart = CurPtr;
94  return true;
95  }
96 
97  // Pretend that we exit the "top-level" include file.
98  // Note that in case of an error (e.g. control stack imbalance)
99  // the routine will issue a fatal error.
100  prepExitInclude(true);
101  return false;
102 }
103 
104 int TGLexer::getNextChar() {
105  char CurChar = *CurPtr++;
106  switch (CurChar) {
107  default:
108  return (unsigned char)CurChar;
109 
110  case 0: {
111  // A NUL character in the stream is either the end of the current buffer or
112  // a spurious NUL in the file. Disambiguate that here.
113  if (CurPtr - 1 == CurBuf.end()) {
114  --CurPtr; // Arrange for another call to return EOF again.
115  return EOF;
116  }
117  PrintError(getLoc(),
118  "NUL character is invalid in source; treated as space");
119  return ' ';
120  }
121 
122  case '\n':
123  case '\r':
124  // Handle the newline character by ignoring it and incrementing the line
125  // count. However, be careful about 'dos style' files with \n\r in them.
126  // Only treat a \n\r or \r\n as a single line.
127  if ((*CurPtr == '\n' || (*CurPtr == '\r')) &&
128  *CurPtr != CurChar)
129  ++CurPtr; // Eat the two char newline sequence.
130  return '\n';
131  }
132 }
133 
134 int TGLexer::peekNextChar(int Index) const {
135  return *(CurPtr + Index);
136 }
137 
138 tgtok::TokKind TGLexer::LexToken(bool FileOrLineStart) {
139  TokStart = CurPtr;
140  // This always consumes at least one character.
141  int CurChar = getNextChar();
142 
143  switch (CurChar) {
144  default:
145  // Handle letters: [a-zA-Z_]
146  if (isalpha(CurChar) || CurChar == '_')
147  return LexIdentifier();
148 
149  // Unknown character, emit an error.
150  return ReturnError(TokStart, "Unexpected character");
151  case EOF:
152  // Lex next token, if we just left an include file.
153  // Note that leaving an include file means that the next
154  // symbol is located at the end of the 'include "..."'
155  // construct, so LexToken() is called with default
156  // false parameter.
157  if (processEOF())
158  return LexToken();
159 
160  // Return EOF denoting the end of lexing.
161  return tgtok::Eof;
162 
163  case ':': return tgtok::colon;
164  case ';': return tgtok::semi;
165  case ',': return tgtok::comma;
166  case '<': return tgtok::less;
167  case '>': return tgtok::greater;
168  case ']': return tgtok::r_square;
169  case '{': return tgtok::l_brace;
170  case '}': return tgtok::r_brace;
171  case '(': return tgtok::l_paren;
172  case ')': return tgtok::r_paren;
173  case '=': return tgtok::equal;
174  case '?': return tgtok::question;
175  case '#':
176  if (FileOrLineStart) {
177  tgtok::TokKind Kind = prepIsDirective();
178  if (Kind != tgtok::Error)
179  return lexPreprocessor(Kind);
180  }
181 
182  return tgtok::paste;
183 
184  // The period is a separate case so we can recognize the "..."
185  // range punctuator.
186  case '.':
187  if (peekNextChar(0) == '.') {
188  ++CurPtr; // Eat second dot.
189  if (peekNextChar(0) == '.') {
190  ++CurPtr; // Eat third dot.
191  return tgtok::dotdotdot;
192  }
193  return ReturnError(TokStart, "Invalid '..' punctuation");
194  }
195  return tgtok::dot;
196 
197  case '\r':
198  PrintFatalError("getNextChar() must never return '\r'");
199  return tgtok::Error;
200 
201  case ' ':
202  case '\t':
203  // Ignore whitespace.
204  return LexToken(FileOrLineStart);
205  case '\n':
206  // Ignore whitespace, and identify the new line.
207  return LexToken(true);
208  case '/':
209  // If this is the start of a // comment, skip until the end of the line or
210  // the end of the buffer.
211  if (*CurPtr == '/')
212  SkipBCPLComment();
213  else if (*CurPtr == '*') {
214  if (SkipCComment())
215  return tgtok::Error;
216  } else // Otherwise, this is an error.
217  return ReturnError(TokStart, "Unexpected character");
218  return LexToken(FileOrLineStart);
219  case '-': case '+':
220  case '0': case '1': case '2': case '3': case '4': case '5': case '6':
221  case '7': case '8': case '9': {
222  int NextChar = 0;
223  if (isdigit(CurChar)) {
224  // Allow identifiers to start with a number if it is followed by
225  // an identifier. This can happen with paste operations like
226  // foo#8i.
227  int i = 0;
228  do {
229  NextChar = peekNextChar(i++);
230  } while (isdigit(NextChar));
231 
232  if (NextChar == 'x' || NextChar == 'b') {
233  // If this is [0-9]b[01] or [0-9]x[0-9A-fa-f] this is most
234  // likely a number.
235  int NextNextChar = peekNextChar(i);
236  switch (NextNextChar) {
237  default:
238  break;
239  case '0': case '1':
240  if (NextChar == 'b')
241  return LexNumber();
243  case '2': case '3': case '4': case '5':
244  case '6': case '7': case '8': case '9':
245  case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
246  case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
247  if (NextChar == 'x')
248  return LexNumber();
249  break;
250  }
251  }
252  }
253 
254  if (isalpha(NextChar) || NextChar == '_')
255  return LexIdentifier();
256 
257  return LexNumber();
258  }
259  case '"': return LexString();
260  case '$': return LexVarName();
261  case '[': return LexBracket();
262  case '!': return LexExclaim();
263  }
264 }
265 
266 /// LexString - Lex "[^"]*"
267 tgtok::TokKind TGLexer::LexString() {
268  const char *StrStart = CurPtr;
269 
270  CurStrVal = "";
271 
272  while (*CurPtr != '"') {
273  // If we hit the end of the buffer, report an error.
274  if (*CurPtr == 0 && CurPtr == CurBuf.end())
275  return ReturnError(StrStart, "End of file in string literal");
276 
277  if (*CurPtr == '\n' || *CurPtr == '\r')
278  return ReturnError(StrStart, "End of line in string literal");
279 
280  if (*CurPtr != '\\') {
281  CurStrVal += *CurPtr++;
282  continue;
283  }
284 
285  ++CurPtr;
286 
287  switch (*CurPtr) {
288  case '\\': case '\'': case '"':
289  // These turn into their literal character.
290  CurStrVal += *CurPtr++;
291  break;
292  case 't':
293  CurStrVal += '\t';
294  ++CurPtr;
295  break;
296  case 'n':
297  CurStrVal += '\n';
298  ++CurPtr;
299  break;
300 
301  case '\n':
302  case '\r':
303  return ReturnError(CurPtr, "escaped newlines not supported in tblgen");
304 
305  // If we hit the end of the buffer, report an error.
306  case '\0':
307  if (CurPtr == CurBuf.end())
308  return ReturnError(StrStart, "End of file in string literal");
310  default:
311  return ReturnError(CurPtr, "invalid escape in string literal");
312  }
313  }
314 
315  ++CurPtr;
316  return tgtok::StrVal;
317 }
318 
319 tgtok::TokKind TGLexer::LexVarName() {
320  if (!isalpha(CurPtr[0]) && CurPtr[0] != '_')
321  return ReturnError(TokStart, "Invalid variable name");
322 
323  // Otherwise, we're ok, consume the rest of the characters.
324  const char *VarNameStart = CurPtr++;
325 
326  while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_')
327  ++CurPtr;
328 
329  CurStrVal.assign(VarNameStart, CurPtr);
330  return tgtok::VarName;
331 }
332 
333 tgtok::TokKind TGLexer::LexIdentifier() {
334  // The first letter is [a-zA-Z_].
335  const char *IdentStart = TokStart;
336 
337  // Match the rest of the identifier regex: [0-9a-zA-Z_]*
338  while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_')
339  ++CurPtr;
340 
341  // Check to see if this identifier is a reserved keyword.
342  StringRef Str(IdentStart, CurPtr-IdentStart);
343 
345  .Case("int", tgtok::Int)
346  .Case("bit", tgtok::Bit)
347  .Case("bits", tgtok::Bits)
348  .Case("string", tgtok::String)
349  .Case("list", tgtok::List)
350  .Case("code", tgtok::Code)
351  .Case("dag", tgtok::Dag)
352  .Case("class", tgtok::Class)
353  .Case("def", tgtok::Def)
354  .Case("true", tgtok::TrueVal)
355  .Case("false", tgtok::FalseVal)
356  .Case("foreach", tgtok::Foreach)
357  .Case("defm", tgtok::Defm)
358  .Case("defset", tgtok::Defset)
359  .Case("multiclass", tgtok::MultiClass)
360  .Case("field", tgtok::Field)
361  .Case("let", tgtok::Let)
362  .Case("in", tgtok::In)
363  .Case("defvar", tgtok::Defvar)
364  .Case("include", tgtok::Include)
365  .Case("if", tgtok::If)
366  .Case("then", tgtok::Then)
367  .Case("else", tgtok::ElseKW)
368  .Case("assert", tgtok::Assert)
369  .Default(tgtok::Id);
370 
371  // A couple of tokens require special processing.
372  switch (Kind) {
373  case tgtok::Include:
374  if (LexInclude()) return tgtok::Error;
375  return Lex();
376  case tgtok::Id:
377  CurStrVal.assign(Str.begin(), Str.end());
378  break;
379  default:
380  break;
381  }
382 
383  return Kind;
384 }
385 
386 /// LexInclude - We just read the "include" token. Get the string token that
387 /// comes next and enter the include.
388 bool TGLexer::LexInclude() {
389  // The token after the include must be a string.
390  tgtok::TokKind Tok = LexToken();
391  if (Tok == tgtok::Error) return true;
392  if (Tok != tgtok::StrVal) {
393  PrintError(getLoc(), "Expected filename after include");
394  return true;
395  }
396 
397  // Get the string.
398  std::string Filename = CurStrVal;
399  std::string IncludedFile;
400 
401  CurBuffer = SrcMgr.AddIncludeFile(Filename, SMLoc::getFromPointer(CurPtr),
402  IncludedFile);
403  if (!CurBuffer) {
404  PrintError(getLoc(), "Could not find include file '" + Filename + "'");
405  return true;
406  }
407 
408  Dependencies.insert(IncludedFile);
409  // Save the line number and lex buffer of the includer.
410  CurBuf = SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer();
411  CurPtr = CurBuf.begin();
412 
413  PrepIncludeStack.push_back(
414  std::make_unique<std::vector<PreprocessorControlDesc>>());
415  return false;
416 }
417 
418 /// SkipBCPLComment - Skip over the comment by finding the next CR or LF.
419 /// Or we may end up at the end of the buffer.
420 void TGLexer::SkipBCPLComment() {
421  ++CurPtr; // skip the second slash.
422  auto EOLPos = CurBuf.find_first_of("\r\n", CurPtr - CurBuf.data());
423  CurPtr = (EOLPos == StringRef::npos) ? CurBuf.end() : CurBuf.data() + EOLPos;
424 }
425 
426 /// SkipCComment - This skips C-style /**/ comments. The only difference from C
427 /// is that we allow nesting.
428 bool TGLexer::SkipCComment() {
429  ++CurPtr; // skip the star.
430  unsigned CommentDepth = 1;
431 
432  while (true) {
433  int CurChar = getNextChar();
434  switch (CurChar) {
435  case EOF:
436  PrintError(TokStart, "Unterminated comment!");
437  return true;
438  case '*':
439  // End of the comment?
440  if (CurPtr[0] != '/') break;
441 
442  ++CurPtr; // End the */.
443  if (--CommentDepth == 0)
444  return false;
445  break;
446  case '/':
447  // Start of a nested comment?
448  if (CurPtr[0] != '*') break;
449  ++CurPtr;
450  ++CommentDepth;
451  break;
452  }
453  }
454 }
455 
456 /// LexNumber - Lex:
457 /// [-+]?[0-9]+
458 /// 0x[0-9a-fA-F]+
459 /// 0b[01]+
460 tgtok::TokKind TGLexer::LexNumber() {
461  if (CurPtr[-1] == '0') {
462  if (CurPtr[0] == 'x') {
463  ++CurPtr;
464  const char *NumStart = CurPtr;
465  while (isxdigit(CurPtr[0]))
466  ++CurPtr;
467 
468  // Requires at least one hex digit.
469  if (CurPtr == NumStart)
470  return ReturnError(TokStart, "Invalid hexadecimal number");
471 
472  errno = 0;
473  CurIntVal = strtoll(NumStart, nullptr, 16);
474  if (errno == EINVAL)
475  return ReturnError(TokStart, "Invalid hexadecimal number");
476  if (errno == ERANGE) {
477  errno = 0;
478  CurIntVal = (int64_t)strtoull(NumStart, nullptr, 16);
479  if (errno == EINVAL)
480  return ReturnError(TokStart, "Invalid hexadecimal number");
481  if (errno == ERANGE)
482  return ReturnError(TokStart, "Hexadecimal number out of range");
483  }
484  return tgtok::IntVal;
485  } else if (CurPtr[0] == 'b') {
486  ++CurPtr;
487  const char *NumStart = CurPtr;
488  while (CurPtr[0] == '0' || CurPtr[0] == '1')
489  ++CurPtr;
490 
491  // Requires at least one binary digit.
492  if (CurPtr == NumStart)
493  return ReturnError(CurPtr-2, "Invalid binary number");
494  CurIntVal = strtoll(NumStart, nullptr, 2);
495  return tgtok::BinaryIntVal;
496  }
497  }
498 
499  // Check for a sign without a digit.
500  if (!isdigit(CurPtr[0])) {
501  if (CurPtr[-1] == '-')
502  return tgtok::minus;
503  else if (CurPtr[-1] == '+')
504  return tgtok::plus;
505  }
506 
507  while (isdigit(CurPtr[0]))
508  ++CurPtr;
509  CurIntVal = strtoll(TokStart, nullptr, 10);
510  return tgtok::IntVal;
511 }
512 
513 /// LexBracket - We just read '['. If this is a code block, return it,
514 /// otherwise return the bracket. Match: '[' and '[{ ( [^}]+ | }[^]] )* }]'
515 tgtok::TokKind TGLexer::LexBracket() {
516  if (CurPtr[0] != '{')
517  return tgtok::l_square;
518  ++CurPtr;
519  const char *CodeStart = CurPtr;
520  while (true) {
521  int Char = getNextChar();
522  if (Char == EOF) break;
523 
524  if (Char != '}') continue;
525 
526  Char = getNextChar();
527  if (Char == EOF) break;
528  if (Char == ']') {
529  CurStrVal.assign(CodeStart, CurPtr-2);
530  return tgtok::CodeFragment;
531  }
532  }
533 
534  return ReturnError(CodeStart - 2, "Unterminated code block");
535 }
536 
537 /// LexExclaim - Lex '!' and '![a-zA-Z]+'.
538 tgtok::TokKind TGLexer::LexExclaim() {
539  if (!isalpha(*CurPtr))
540  return ReturnError(CurPtr - 1, "Invalid \"!operator\"");
541 
542  const char *Start = CurPtr++;
543  while (isalpha(*CurPtr))
544  ++CurPtr;
545 
546  // Check to see which operator this is.
548  StringSwitch<tgtok::TokKind>(StringRef(Start, CurPtr - Start))
549  .Case("eq", tgtok::XEq)
550  .Case("ne", tgtok::XNe)
551  .Case("le", tgtok::XLe)
552  .Case("lt", tgtok::XLt)
553  .Case("ge", tgtok::XGe)
554  .Case("gt", tgtok::XGt)
555  .Case("if", tgtok::XIf)
556  .Case("cond", tgtok::XCond)
557  .Case("isa", tgtok::XIsA)
558  .Case("head", tgtok::XHead)
559  .Case("tail", tgtok::XTail)
560  .Case("size", tgtok::XSize)
561  .Case("con", tgtok::XConcat)
562  .Case("dag", tgtok::XDag)
563  .Case("add", tgtok::XADD)
564  .Case("sub", tgtok::XSUB)
565  .Case("mul", tgtok::XMUL)
566  .Case("not", tgtok::XNOT)
567  .Case("and", tgtok::XAND)
568  .Case("or", tgtok::XOR)
569  .Case("xor", tgtok::XXOR)
570  .Case("shl", tgtok::XSHL)
571  .Case("sra", tgtok::XSRA)
572  .Case("srl", tgtok::XSRL)
573  .Case("cast", tgtok::XCast)
574  .Case("empty", tgtok::XEmpty)
575  .Case("subst", tgtok::XSubst)
576  .Case("foldl", tgtok::XFoldl)
577  .Case("foreach", tgtok::XForEach)
578  .Case("filter", tgtok::XFilter)
579  .Case("listconcat", tgtok::XListConcat)
580  .Case("listsplat", tgtok::XListSplat)
581  .Case("strconcat", tgtok::XStrConcat)
582  .Case("interleave", tgtok::XInterleave)
583  .Case("substr", tgtok::XSubstr)
584  .Case("find", tgtok::XFind)
585  .Cases("setdagop", "setop", tgtok::XSetDagOp) // !setop is deprecated.
586  .Cases("getdagop", "getop", tgtok::XGetDagOp) // !getop is deprecated.
587  .Case("exists", tgtok::XExists)
589 
590  return Kind != tgtok::Error ? Kind : ReturnError(Start-1, "Unknown operator");
591 }
592 
593 bool TGLexer::prepExitInclude(bool IncludeStackMustBeEmpty) {
594  // Report an error, if preprocessor control stack for the current
595  // file is not empty.
596  if (!PrepIncludeStack.back()->empty()) {
597  prepReportPreprocessorStackError();
598 
599  return false;
600  }
601 
602  // Pop the preprocessing controls from the include stack.
603  if (PrepIncludeStack.empty()) {
604  PrintFatalError("Preprocessor include stack is empty");
605  }
606 
607  PrepIncludeStack.pop_back();
608 
609  if (IncludeStackMustBeEmpty) {
610  if (!PrepIncludeStack.empty())
611  PrintFatalError("Preprocessor include stack is not empty");
612  } else {
613  if (PrepIncludeStack.empty())
614  PrintFatalError("Preprocessor include stack is empty");
615  }
616 
617  return true;
618 }
619 
620 tgtok::TokKind TGLexer::prepIsDirective() const {
621  for (const auto &PD : PreprocessorDirs) {
622  int NextChar = *CurPtr;
623  bool Match = true;
624  unsigned I = 0;
625  for (; I < strlen(PD.Word); ++I) {
626  if (NextChar != PD.Word[I]) {
627  Match = false;
628  break;
629  }
630 
631  NextChar = peekNextChar(I + 1);
632  }
633 
634  // Check for whitespace after the directive. If there is no whitespace,
635  // then we do not recognize it as a preprocessing directive.
636  if (Match) {
637  tgtok::TokKind Kind = PD.Kind;
638 
639  // New line and EOF may follow only #else/#endif. It will be reported
640  // as an error for #ifdef/#define after the call to prepLexMacroName().
641  if (NextChar == ' ' || NextChar == '\t' || NextChar == EOF ||
642  NextChar == '\n' ||
643  // It looks like TableGen does not support '\r' as the actual
644  // carriage return, e.g. getNextChar() treats a single '\r'
645  // as '\n'. So we do the same here.
646  NextChar == '\r')
647  return Kind;
648 
649  // Allow comments after some directives, e.g.:
650  // #else// OR #else/**/
651  // #endif// OR #endif/**/
652  //
653  // Note that we do allow comments after #ifdef/#define here, e.g.
654  // #ifdef/**/ AND #ifdef//
655  // #define/**/ AND #define//
656  //
657  // These cases will be reported as incorrect after calling
658  // prepLexMacroName(). We could have supported C-style comments
659  // after #ifdef/#define, but this would complicate the code
660  // for little benefit.
661  if (NextChar == '/') {
662  NextChar = peekNextChar(I + 1);
663 
664  if (NextChar == '*' || NextChar == '/')
665  return Kind;
666 
667  // Pretend that we do not recognize the directive.
668  }
669  }
670  }
671 
672  return tgtok::Error;
673 }
674 
675 bool TGLexer::prepEatPreprocessorDirective(tgtok::TokKind Kind) {
676  TokStart = CurPtr;
677 
678  for (const auto &PD : PreprocessorDirs)
679  if (PD.Kind == Kind) {
680  // Advance CurPtr to the end of the preprocessing word.
681  CurPtr += strlen(PD.Word);
682  return true;
683  }
684 
685  PrintFatalError("Unsupported preprocessing token in "
686  "prepEatPreprocessorDirective()");
687  return false;
688 }
689 
690 tgtok::TokKind TGLexer::lexPreprocessor(
691  tgtok::TokKind Kind, bool ReturnNextLiveToken) {
692 
693  // We must be looking at a preprocessing directive. Eat it!
694  if (!prepEatPreprocessorDirective(Kind))
695  PrintFatalError("lexPreprocessor() called for unknown "
696  "preprocessor directive");
697 
698  if (Kind == tgtok::Ifdef || Kind == tgtok::Ifndef) {
699  StringRef MacroName = prepLexMacroName();
700  StringRef IfTokName = Kind == tgtok::Ifdef ? "#ifdef" : "#ifndef";
701  if (MacroName.empty())
702  return ReturnError(TokStart, "Expected macro name after " + IfTokName);
703 
704  bool MacroIsDefined = DefinedMacros.count(MacroName) != 0;
705 
706  // Canonicalize ifndef to ifdef equivalent
707  if (Kind == tgtok::Ifndef) {
708  MacroIsDefined = !MacroIsDefined;
709  Kind = tgtok::Ifdef;
710  }
711 
712  // Regardless of whether we are processing tokens or not,
713  // we put the #ifdef control on stack.
714  PrepIncludeStack.back()->push_back(
715  {Kind, MacroIsDefined, SMLoc::getFromPointer(TokStart)});
716 
717  if (!prepSkipDirectiveEnd())
718  return ReturnError(CurPtr, "Only comments are supported after " +
719  IfTokName + " NAME");
720 
721  // If we were not processing tokens before this #ifdef,
722  // then just return back to the lines skipping code.
723  if (!ReturnNextLiveToken)
724  return Kind;
725 
726  // If we were processing tokens before this #ifdef,
727  // and the macro is defined, then just return the next token.
728  if (MacroIsDefined)
729  return LexToken();
730 
731  // We were processing tokens before this #ifdef, and the macro
732  // is not defined, so we have to start skipping the lines.
733  // If the skipping is successful, it will return the token following
734  // either #else or #endif corresponding to this #ifdef.
735  if (prepSkipRegion(ReturnNextLiveToken))
736  return LexToken();
737 
738  return tgtok::Error;
739  } else if (Kind == tgtok::Else) {
740  // Check if this #else is correct before calling prepSkipDirectiveEnd(),
741  // which will move CurPtr away from the beginning of #else.
742  if (PrepIncludeStack.back()->empty())
743  return ReturnError(TokStart, "#else without #ifdef or #ifndef");
744 
745  PreprocessorControlDesc IfdefEntry = PrepIncludeStack.back()->back();
746 
747  if (IfdefEntry.Kind != tgtok::Ifdef) {
748  PrintError(TokStart, "double #else");
749  return ReturnError(IfdefEntry.SrcPos, "Previous #else is here");
750  }
751 
752  // Replace the corresponding #ifdef's control with its negation
753  // on the control stack.
754  PrepIncludeStack.back()->pop_back();
755  PrepIncludeStack.back()->push_back(
756  {Kind, !IfdefEntry.IsDefined, SMLoc::getFromPointer(TokStart)});
757 
758  if (!prepSkipDirectiveEnd())
759  return ReturnError(CurPtr, "Only comments are supported after #else");
760 
761  // If we were processing tokens before this #else,
762  // we have to start skipping lines until the matching #endif.
763  if (ReturnNextLiveToken) {
764  if (prepSkipRegion(ReturnNextLiveToken))
765  return LexToken();
766 
767  return tgtok::Error;
768  }
769 
770  // Return to the lines skipping code.
771  return Kind;
772  } else if (Kind == tgtok::Endif) {
773  // Check if this #endif is correct before calling prepSkipDirectiveEnd(),
774  // which will move CurPtr away from the beginning of #endif.
775  if (PrepIncludeStack.back()->empty())
776  return ReturnError(TokStart, "#endif without #ifdef");
777 
778  auto &IfdefOrElseEntry = PrepIncludeStack.back()->back();
779 
780  if (IfdefOrElseEntry.Kind != tgtok::Ifdef &&
781  IfdefOrElseEntry.Kind != tgtok::Else) {
782  PrintFatalError("Invalid preprocessor control on the stack");
783  return tgtok::Error;
784  }
785 
786  if (!prepSkipDirectiveEnd())
787  return ReturnError(CurPtr, "Only comments are supported after #endif");
788 
789  PrepIncludeStack.back()->pop_back();
790 
791  // If we were processing tokens before this #endif, then
792  // we should continue it.
793  if (ReturnNextLiveToken) {
794  return LexToken();
795  }
796 
797  // Return to the lines skipping code.
798  return Kind;
799  } else if (Kind == tgtok::Define) {
800  StringRef MacroName = prepLexMacroName();
801  if (MacroName.empty())
802  return ReturnError(TokStart, "Expected macro name after #define");
803 
804  if (!DefinedMacros.insert(MacroName).second)
806  "Duplicate definition of macro: " + Twine(MacroName));
807 
808  if (!prepSkipDirectiveEnd())
809  return ReturnError(CurPtr,
810  "Only comments are supported after #define NAME");
811 
812  if (!ReturnNextLiveToken) {
813  PrintFatalError("#define must be ignored during the lines skipping");
814  return tgtok::Error;
815  }
816 
817  return LexToken();
818  }
819 
820  PrintFatalError("Preprocessing directive is not supported");
821  return tgtok::Error;
822 }
823 
824 bool TGLexer::prepSkipRegion(bool MustNeverBeFalse) {
825  if (!MustNeverBeFalse)
826  PrintFatalError("Invalid recursion.");
827 
828  do {
829  // Skip all symbols to the line end.
830  prepSkipToLineEnd();
831 
832  // Find the first non-whitespace symbol in the next line(s).
833  if (!prepSkipLineBegin())
834  return false;
835 
836  // If the first non-blank/comment symbol on the line is '#',
837  // it may be a start of preprocessing directive.
838  //
839  // If it is not '#' just go to the next line.
840  if (*CurPtr == '#')
841  ++CurPtr;
842  else
843  continue;
844 
845  tgtok::TokKind Kind = prepIsDirective();
846 
847  // If we did not find a preprocessing directive or it is #define,
848  // then just skip to the next line. We do not have to do anything
849  // for #define in the line-skipping mode.
850  if (Kind == tgtok::Error || Kind == tgtok::Define)
851  continue;
852 
853  tgtok::TokKind ProcessedKind = lexPreprocessor(Kind, false);
854 
855  // If lexPreprocessor() encountered an error during lexing this
856  // preprocessor idiom, then return false to the calling lexPreprocessor().
857  // This will force tgtok::Error to be returned to the tokens processing.
858  if (ProcessedKind == tgtok::Error)
859  return false;
860 
861  if (Kind != ProcessedKind)
862  PrintFatalError("prepIsDirective() and lexPreprocessor() "
863  "returned different token kinds");
864 
865  // If this preprocessing directive enables tokens processing,
866  // then return to the lexPreprocessor() and get to the next token.
867  // We can move from line-skipping mode to processing tokens only
868  // due to #else or #endif.
869  if (prepIsProcessingEnabled()) {
870  if (Kind != tgtok::Else && Kind != tgtok::Endif) {
871  PrintFatalError("Tokens processing was enabled by an unexpected "
872  "preprocessing directive");
873  return false;
874  }
875 
876  return true;
877  }
878  } while (CurPtr != CurBuf.end());
879 
880  // We have reached the end of the file, but never left the lines-skipping
881  // mode. This means there is no matching #endif.
882  prepReportPreprocessorStackError();
883  return false;
884 }
885 
886 StringRef TGLexer::prepLexMacroName() {
887  // Skip whitespaces between the preprocessing directive and the macro name.
888  while (*CurPtr == ' ' || *CurPtr == '\t')
889  ++CurPtr;
890 
891  TokStart = CurPtr;
892  // Macro names start with [a-zA-Z_].
893  if (*CurPtr != '_' && !isalpha(*CurPtr))
894  return "";
895 
896  // Match the rest of the identifier regex: [0-9a-zA-Z_]*
897  while (isalpha(*CurPtr) || isdigit(*CurPtr) || *CurPtr == '_')
898  ++CurPtr;
899 
900  return StringRef(TokStart, CurPtr - TokStart);
901 }
902 
903 bool TGLexer::prepSkipLineBegin() {
904  while (CurPtr != CurBuf.end()) {
905  switch (*CurPtr) {
906  case ' ':
907  case '\t':
908  case '\n':
909  case '\r':
910  break;
911 
912  case '/': {
913  int NextChar = peekNextChar(1);
914  if (NextChar == '*') {
915  // Skip C-style comment.
916  // Note that we do not care about skipping the C++-style comments.
917  // If the line contains "//", it may not contain any processable
918  // preprocessing directive. Just return CurPtr pointing to
919  // the first '/' in this case. We also do not care about
920  // incorrect symbols after the first '/' - we are in lines-skipping
921  // mode, so incorrect code is allowed to some extent.
922 
923  // Set TokStart to the beginning of the comment to enable proper
924  // diagnostic printing in case of error in SkipCComment().
925  TokStart = CurPtr;
926 
927  // CurPtr must point to '*' before call to SkipCComment().
928  ++CurPtr;
929  if (SkipCComment())
930  return false;
931  } else {
932  // CurPtr points to the non-whitespace '/'.
933  return true;
934  }
935 
936  // We must not increment CurPtr after the comment was lexed.
937  continue;
938  }
939 
940  default:
941  return true;
942  }
943 
944  ++CurPtr;
945  }
946 
947  // We have reached the end of the file. Return to the lines skipping
948  // code, and allow it to handle the EOF as needed.
949  return true;
950 }
951 
952 bool TGLexer::prepSkipDirectiveEnd() {
953  while (CurPtr != CurBuf.end()) {
954  switch (*CurPtr) {
955  case ' ':
956  case '\t':
957  break;
958 
959  case '\n':
960  case '\r':
961  return true;
962 
963  case '/': {
964  int NextChar = peekNextChar(1);
965  if (NextChar == '/') {
966  // Skip C++-style comment.
967  // We may just return true now, but let's skip to the line/buffer end
968  // to simplify the method specification.
969  ++CurPtr;
970  SkipBCPLComment();
971  } else if (NextChar == '*') {
972  // When we are skipping C-style comment at the end of a preprocessing
973  // directive, we can skip several lines. If any meaningful TD token
974  // follows the end of the C-style comment on the same line, it will
975  // be considered as an invalid usage of TD token.
976  // For example, we want to forbid usages like this one:
977  // #define MACRO class Class {}
978  // But with C-style comments we also disallow the following:
979  // #define MACRO /* This macro is used
980  // to ... */ class Class {}
981  // One can argue that this should be allowed, but it does not seem
982  // to be worth of the complication. Moreover, this matches
983  // the C preprocessor behavior.
984 
985  // Set TokStart to the beginning of the comment to enable proper
986  // diagnostic printer in case of error in SkipCComment().
987  TokStart = CurPtr;
988  ++CurPtr;
989  if (SkipCComment())
990  return false;
991  } else {
992  TokStart = CurPtr;
993  PrintError(CurPtr, "Unexpected character");
994  return false;
995  }
996 
997  // We must not increment CurPtr after the comment was lexed.
998  continue;
999  }
1000 
1001  default:
1002  // Do not allow any non-whitespaces after the directive.
1003  TokStart = CurPtr;
1004  return false;
1005  }
1006 
1007  ++CurPtr;
1008  }
1009 
1010  return true;
1011 }
1012 
1013 void TGLexer::prepSkipToLineEnd() {
1014  while (*CurPtr != '\n' && *CurPtr != '\r' && CurPtr != CurBuf.end())
1015  ++CurPtr;
1016 }
1017 
1018 bool TGLexer::prepIsProcessingEnabled() {
1019  for (const PreprocessorControlDesc &I :
1020  llvm::reverse(*PrepIncludeStack.back()))
1021  if (!I.IsDefined)
1022  return false;
1023 
1024  return true;
1025 }
1026 
1027 void TGLexer::prepReportPreprocessorStackError() {
1028  if (PrepIncludeStack.back()->empty())
1029  PrintFatalError("prepReportPreprocessorStackError() called with "
1030  "empty control stack");
1031 
1032  auto &PrepControl = PrepIncludeStack.back()->back();
1033  PrintError(CurBuf.end(), "Reached EOF without matching #endif");
1034  PrintError(PrepControl.SrcPos, "The latest preprocessor control is here");
1035 
1036  TokStart = CurPtr;
1037 }
llvm::tgtok::XFilter
@ XFilter
Definition: TGLexer.h:57
llvm::StringSwitch::Case
StringSwitch & Case(StringLiteral S, T Value)
Definition: StringSwitch.h:69
i
i
Definition: README.txt:29
MemoryBuffer.h
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:17
llvm::tgtok::Def
@ Def
Definition: TGLexer.h:50
llvm::pdb::PDB_BuiltinType::Char
@ Char
llvm::tgtok::XForEach
@ XForEach
Definition: TGLexer.h:57
llvm::tgtok::Field
@ Field
Definition: TGLexer.h:51
llvm::StringSwitch::Default
LLVM_NODISCARD R Default(T Value)
Definition: StringSwitch.h:183
llvm::StringRef::npos
static constexpr size_t npos
Definition: StringRef.h:60
llvm::X86II::PD
@ PD
Definition: X86BaseInfo.h:787
llvm::tgtok::Code
@ Code
Definition: TGLexer.h:50
llvm::tgtok::paste
@ paste
Definition: TGLexer.h:45
llvm::tgtok::XXOR
@ XXOR
Definition: TGLexer.h:55
llvm::tgtok::l_brace
@ l_brace
Definition: TGLexer.h:39
llvm::tgtok::XStrConcat
@ XStrConcat
Definition: TGLexer.h:56
llvm::tgtok::l_paren
@ l_paren
Definition: TGLexer.h:40
llvm::tgtok::VarName
@ VarName
Definition: TGLexer.h:72
llvm::tgtok::Defm
@ Defm
Definition: TGLexer.h:50
llvm::SourceMgr::getParentIncludeLoc
SMLoc getParentIncludeLoc(unsigned i) const
Definition: SourceMgr.h:137
llvm::tgtok::comma
@ comma
Definition: TGLexer.h:43
llvm::reverse
auto reverse(ContainerTy &&C, std::enable_if_t< has_rbegin< ContainerTy >::value > *=nullptr)
Definition: STLExtras.h:380
llvm::tgtok::Bits
@ Bits
Definition: TGLexer.h:50
llvm::tgtok::XGe
@ XGe
Definition: TGLexer.h:58
llvm::tgtok::XSUB
@ XSUB
Definition: TGLexer.h:55
llvm::tgtok::l_square
@ l_square
Definition: TGLexer.h:38
llvm::tgtok::FalseVal
@ FalseVal
Definition: TGLexer.h:62
llvm::StringSet::insert
std::pair< typename Base::iterator, bool > insert(StringRef key)
Definition: StringSet.h:34
llvm::DiagnosticPredicateTy::Match
@ Match
TGLexer.h
llvm::tgtok::XHead
@ XHead
Definition: TGLexer.h:57
llvm::tgtok::Else
@ Else
Definition: TGLexer.h:76
llvm::tgtok::BinaryIntVal
@ BinaryIntVal
Definition: TGLexer.h:69
llvm::TGLexer::TGLexer
TGLexer(SourceMgr &SrcMgr, ArrayRef< std::string > Macros)
Definition: TGLexer.cpp:47
llvm::tgtok::plus
@ plus
Definition: TGLexer.h:37
llvm::TGLexer::Lex
tgtok::TokKind Lex()
Definition: TGLexer.h:107
llvm::tgtok::XMUL
@ XMUL
Definition: TGLexer.h:55
llvm::tgtok::Dag
@ Dag
Definition: TGLexer.h:50
llvm::tgtok::XFind
@ XFind
Definition: TGLexer.h:56
llvm::tgtok::Then
@ Then
Definition: TGLexer.h:52
llvm::tgtok::question
@ question
Definition: TGLexer.h:44
llvm::tgtok::XOR
@ XOR
Definition: TGLexer.h:55
llvm::SMLoc
Represents a location in source code.
Definition: SMLoc.h:23
Twine.h
llvm::tgtok::Assert
@ Assert
Definition: TGLexer.h:50
llvm::SrcMgr
SourceMgr SrcMgr
Definition: Error.cpp:24
llvm::tgtok::XIsA
@ XIsA
Definition: TGLexer.h:58
llvm::tgtok::XCast
@ XCast
Definition: TGLexer.h:56
llvm::dwarf::Index
Index
Definition: Dwarf.h:472
llvm::tgtok::XListConcat
@ XListConcat
Definition: TGLexer.h:56
llvm::PrintFatalError
void PrintFatalError(const Twine &Msg)
Definition: Error.cpp:125
llvm::SourceMgr::getMainFileID
unsigned getMainFileID() const
Definition: SourceMgr.h:132
llvm::tgtok::If
@ If
Definition: TGLexer.h:51
llvm::MemoryBuffer::getBuffer
StringRef getBuffer() const
Definition: MemoryBuffer.h:69
llvm::tgtok::equal
@ equal
Definition: TGLexer.h:44
llvm::tgtok::XNOT
@ XNOT
Definition: TGLexer.h:55
llvm::lltok::Kind
Kind
Definition: LLToken.h:18
SourceMgr.h
llvm::tgtok::XGt
@ XGt
Definition: TGLexer.h:58
llvm::SourceMgr::getMemoryBuffer
const MemoryBuffer * getMemoryBuffer(unsigned i) const
Definition: SourceMgr.h:125
llvm::tgtok::XSRA
@ XSRA
Definition: TGLexer.h:55
llvm::tgtok::Foreach
@ Foreach
Definition: TGLexer.h:51
llvm::tgtok::XInterleave
@ XInterleave
Definition: TGLexer.h:56
llvm::tgtok::In
@ In
Definition: TGLexer.h:51
Error.h
llvm::tgtok::Defset
@ Defset
Definition: TGLexer.h:50
llvm::tgtok::XIf
@ XIf
Definition: TGLexer.h:57
llvm::StringRef::empty
constexpr LLVM_NODISCARD bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:153
llvm::tgtok::XEq
@ XEq
Definition: TGLexer.h:58
llvm::StringRef::end
iterator end() const
Definition: StringRef.h:130
llvm::tgtok::Int
@ Int
Definition: TGLexer.h:51
llvm::tgtok::XExists
@ XExists
Definition: TGLexer.h:59
llvm::tgtok::ElseKW
@ ElseKW
Definition: TGLexer.h:50
llvm::tgtok::r_square
@ r_square
Definition: TGLexer.h:38
I
#define I(x, y, z)
Definition: MD5.cpp:58
llvm::tgtok::Defvar
@ Defvar
Definition: TGLexer.h:50
ArrayRef.h
llvm::tgtok::XSubstr
@ XSubstr
Definition: TGLexer.h:56
llvm::tgtok::Include
@ Include
Definition: TGLexer.h:51
llvm::tgtok::r_paren
@ r_paren
Definition: TGLexer.h:40
llvm::tgtok::XConcat
@ XConcat
Definition: TGLexer.h:55
llvm::tgtok::XLe
@ XLe
Definition: TGLexer.h:58
llvm::irsymtab::storage::Word
support::ulittle32_t Word
Definition: IRSymtab.h:52
llvm::tgtok::XCond
@ XCond
Definition: TGLexer.h:58
llvm::ArrayRef< std::string >
llvm::SourceMgr::FindBufferContainingLoc
unsigned FindBufferContainingLoc(SMLoc Loc) const
Return the ID of the buffer containing the specified location.
Definition: SourceMgr.cpp:69
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
llvm::tgtok::Endif
@ Endif
Definition: TGLexer.h:76
llvm::tgtok::String
@ String
Definition: TGLexer.h:52
llvm::tgtok::XADD
@ XADD
Definition: TGLexer.h:55
llvm::SourceMgr
This owns the files read by a parser, handles include stacks, and handles diagnostic wrangling.
Definition: SourceMgr.h:31
Compiler.h
llvm::tgtok::XSRL
@ XSRL
Definition: TGLexer.h:55
llvm::tgtok::XGetDagOp
@ XGetDagOp
Definition: TGLexer.h:58
llvm::tgtok::Ifdef
@ Ifdef
Definition: TGLexer.h:76
LLVM_FALLTHROUGH
#define LLVM_FALLTHROUGH
LLVM_FALLTHROUGH - Mark fallthrough cases in switch statements.
Definition: Compiler.h:280
llvm::StringSwitch::Cases
StringSwitch & Cases(StringLiteral S0, StringLiteral S1, T Value)
Definition: StringSwitch.h:90
llvm::tgtok::Ifndef
@ Ifndef
Definition: TGLexer.h:76
llvm::AMDGPU::SendMsg::Msg
const CustomOperand< const MCSubtargetInfo & > Msg[]
Definition: AMDGPUAsmUtils.cpp:39
llvm::tgtok::StrVal
@ StrVal
Definition: TGLexer.h:72
llvm::tgtok::dot
@ dot
Definition: TGLexer.h:43
llvm::tgtok::IntVal
@ IntVal
Definition: TGLexer.h:65
llvm::Twine
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:83
llvm::tgtok::r_brace
@ r_brace
Definition: TGLexer.h:39
llvm::tgtok::Eof
@ Eof
Definition: TGLexer.h:34
llvm::SMLoc::getPointer
const char * getPointer() const
Definition: SMLoc.h:34
llvm::tgtok::XAND
@ XAND
Definition: TGLexer.h:55
llvm::tgtok::Error
@ Error
Definition: TGLexer.h:34
llvm::tgtok::XListSplat
@ XListSplat
Definition: TGLexer.h:56
llvm::tgtok::XSHL
@ XSHL
Definition: TGLexer.h:55
StringSwitch.h
llvm::StringMap::count
size_type count(StringRef Key) const
count - Return 1 if the element is in the map, 0 otherwise.
Definition: StringMap.h:246
llvm::tgtok::XFoldl
@ XFoldl
Definition: TGLexer.h:57
llvm::tgtok::XSubst
@ XSubst
Definition: TGLexer.h:57
llvm::tgtok::Class
@ Class
Definition: TGLexer.h:50
llvm::SourceMgr::AddIncludeFile
unsigned AddIncludeFile(const std::string &Filename, SMLoc IncludeLoc, std::string &IncludedFile)
Search for a file with the specified name in the current directory or in one of the IncludeDirs.
Definition: SourceMgr.cpp:40
llvm::tgtok::XDag
@ XDag
Definition: TGLexer.h:58
llvm::tgtok::greater
@ greater
Definition: TGLexer.h:41
llvm::tgtok::CodeFragment
@ CodeFragment
Definition: TGLexer.h:72
llvm::tgtok::XSize
@ XSize
Definition: TGLexer.h:57
llvm::tgtok::XNe
@ XNe
Definition: TGLexer.h:58
llvm::PrintError
void PrintError(const Twine &Msg)
Definition: Error.cpp:101
llvm::tgtok::less
@ less
Definition: TGLexer.h:41
llvm::tgtok::MultiClass
@ MultiClass
Definition: TGLexer.h:51
llvm::tgtok::TokKind
TokKind
Definition: TGLexer.h:32
llvm::PrintWarning
void PrintWarning(const Twine &Msg)
Definition: Error.cpp:89
llvm::tgtok::Bit
@ Bit
Definition: TGLexer.h:50
llvm::StringRef::data
const LLVM_NODISCARD char * data() const
data - Get a pointer to the start of the string (which may not be null terminated).
Definition: StringRef.h:149
llvm::SMLoc::getFromPointer
static SMLoc getFromPointer(const char *Ptr)
Definition: SMLoc.h:36
llvm::tgtok::XSetDagOp
@ XSetDagOp
Definition: TGLexer.h:58
llvm::StringSwitch
A switch()-like statement whose cases are string literals.
Definition: StringSwitch.h:44
llvm::StringRef::find_first_of
LLVM_NODISCARD size_t find_first_of(char C, size_t From=0) const
Find the first character in the string that is C, or npos if not found.
Definition: StringRef.h:414
llvm::TGLexer::getLoc
SMLoc getLoc() const
Definition: TGLexer.cpp:62
llvm::tgtok::List
@ List
Definition: TGLexer.h:51
llvm::tgtok::XTail
@ XTail
Definition: TGLexer.h:57
llvm::tgtok::semi
@ semi
Definition: TGLexer.h:42
llvm::StringRef::begin
iterator begin() const
Definition: StringRef.h:128
llvm::tgtok::TrueVal
@ TrueVal
Definition: TGLexer.h:62
llvm::tgtok::minus
@ minus
Definition: TGLexer.h:37
llvm::tgtok::XLt
@ XLt
Definition: TGLexer.h:58
llvm::tgtok::Define
@ Define
Definition: TGLexer.h:76
llvm::tgtok::colon
@ colon
Definition: TGLexer.h:42
llvm::tgtok::dotdotdot
@ dotdotdot
Definition: TGLexer.h:46
llvm::tgtok::Id
@ Id
Definition: TGLexer.h:72
llvm::tgtok::XEmpty
@ XEmpty
Definition: TGLexer.h:57
llvm::tgtok::Let
@ Let
Definition: TGLexer.h:51