clang  14.0.0git
InterpolatingCompilationDatabase.cpp
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1 //===- InterpolatingCompilationDatabase.cpp ---------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // InterpolatingCompilationDatabase wraps another CompilationDatabase and
10 // attempts to heuristically determine appropriate compile commands for files
11 // that are not included, such as headers or newly created files.
12 //
13 // Motivating cases include:
14 // Header files that live next to their implementation files. These typically
15 // share a base filename. (libclang/CXString.h, libclang/CXString.cpp).
16 // Some projects separate headers from includes. Filenames still typically
17 // match, maybe other path segments too. (include/llvm/IR/Use.h, lib/IR/Use.cc).
18 // Matches are sometimes only approximate (Sema.h, SemaDecl.cpp). This goes
19 // for directories too (Support/Unix/Process.inc, lib/Support/Process.cpp).
20 // Even if we can't find a "right" compile command, even a random one from
21 // the project will tend to get important flags like -I and -x right.
22 //
23 // We "borrow" the compile command for the closest available file:
24 // - points are awarded if the filename matches (ignoring extension)
25 // - points are awarded if the directory structure matches
26 // - ties are broken by length of path prefix match
27 //
28 // The compile command is adjusted, replacing the filename and removing output
29 // file arguments. The -x and -std flags may be affected too.
30 //
31 // Source language is a tricky issue: is it OK to use a .c file's command
32 // for building a .cc file? What language is a .h file in?
33 // - We only consider compile commands for c-family languages as candidates.
34 // - For files whose language is implied by the filename (e.g. .m, .hpp)
35 // we prefer candidates from the same language.
36 // If we must cross languages, we drop any -x and -std flags.
37 // - For .h files, candidates from any c-family language are acceptable.
38 // We use the candidate's language, inserting e.g. -x c++-header.
39 //
40 // This class is only useful when wrapping databases that can enumerate all
41 // their compile commands. If getAllFilenames() is empty, no inference occurs.
42 //
43 //===----------------------------------------------------------------------===//
44 
46 #include "clang/Driver/Driver.h"
47 #include "clang/Driver/Options.h"
48 #include "clang/Driver/Types.h"
50 #include "llvm/ADT/ArrayRef.h"
51 #include "llvm/ADT/DenseMap.h"
52 #include "llvm/ADT/Optional.h"
53 #include "llvm/ADT/StringExtras.h"
54 #include "llvm/ADT/StringSwitch.h"
55 #include "llvm/Option/ArgList.h"
56 #include "llvm/Option/OptTable.h"
57 #include "llvm/Support/Debug.h"
58 #include "llvm/Support/Path.h"
59 #include "llvm/Support/StringSaver.h"
60 #include "llvm/Support/raw_ostream.h"
61 #include <memory>
62 
63 namespace clang {
64 namespace tooling {
65 namespace {
66 using namespace llvm;
67 namespace types = clang::driver::types;
68 namespace path = llvm::sys::path;
69 
70 // The length of the prefix these two strings have in common.
71 size_t matchingPrefix(StringRef L, StringRef R) {
72  size_t Limit = std::min(L.size(), R.size());
73  for (size_t I = 0; I < Limit; ++I)
74  if (L[I] != R[I])
75  return I;
76  return Limit;
77 }
78 
79 // A comparator for searching SubstringWithIndexes with std::equal_range etc.
80 // Optionaly prefix semantics: compares equal if the key is a prefix.
81 template <bool Prefix> struct Less {
82  bool operator()(StringRef Key, std::pair<StringRef, size_t> Value) const {
83  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
84  return Key < V;
85  }
86  bool operator()(std::pair<StringRef, size_t> Value, StringRef Key) const {
87  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
88  return V < Key;
89  }
90 };
91 
92 // Infer type from filename. If we might have gotten it wrong, set *Certain.
93 // *.h will be inferred as a C header, but not certain.
94 types::ID guessType(StringRef Filename, bool *Certain = nullptr) {
95  // path::extension is ".cpp", lookupTypeForExtension wants "cpp".
96  auto Lang =
97  types::lookupTypeForExtension(path::extension(Filename).substr(1));
98  if (Certain)
99  *Certain = Lang != types::TY_CHeader && Lang != types::TY_INVALID;
100  return Lang;
101 }
102 
103 // Return Lang as one of the canonical supported types.
104 // e.g. c-header --> c; fortran --> TY_INVALID
105 static types::ID foldType(types::ID Lang) {
106  switch (Lang) {
107  case types::TY_C:
108  case types::TY_CHeader:
109  return types::TY_C;
110  case types::TY_ObjC:
111  case types::TY_ObjCHeader:
112  return types::TY_ObjC;
113  case types::TY_CXX:
114  case types::TY_CXXHeader:
115  return types::TY_CXX;
116  case types::TY_ObjCXX:
117  case types::TY_ObjCXXHeader:
118  return types::TY_ObjCXX;
119  case types::TY_CUDA:
120  case types::TY_CUDA_DEVICE:
121  return types::TY_CUDA;
122  default:
123  return types::TY_INVALID;
124  }
125 }
126 
127 // A CompileCommand that can be applied to another file.
128 struct TransferableCommand {
129  // Flags that should not apply to all files are stripped from CommandLine.
130  CompileCommand Cmd;
131  // Language detected from -x or the filename. Never TY_INVALID.
133  // Standard specified by -std.
135  // Whether the command line is for the cl-compatible driver.
137 
138  TransferableCommand(CompileCommand C)
139  : Cmd(std::move(C)), Type(guessType(Cmd.Filename)) {
140  std::vector<std::string> OldArgs = std::move(Cmd.CommandLine);
141  Cmd.CommandLine.clear();
142 
143  // Wrap the old arguments in an InputArgList.
144  llvm::opt::InputArgList ArgList;
145  {
147  for (const std::string &S : OldArgs)
148  TmpArgv.push_back(S.c_str());
149  ClangCLMode = !TmpArgv.empty() &&
151  TmpArgv.front(), llvm::makeArrayRef(TmpArgv).slice(1)));
152  ArgList = {TmpArgv.begin(), TmpArgv.end()};
153  }
154 
155  // Parse the old args in order to strip out and record unwanted flags.
156  // We parse each argument individually so that we can retain the exact
157  // spelling of each argument; re-rendering is lossy for aliased flags.
158  // E.g. in CL mode, /W4 maps to -Wall.
159  auto &OptTable = clang::driver::getDriverOptTable();
160  if (!OldArgs.empty())
161  Cmd.CommandLine.emplace_back(OldArgs.front());
162  for (unsigned Pos = 1; Pos < OldArgs.size();) {
163  using namespace driver::options;
164 
165  const unsigned OldPos = Pos;
166  std::unique_ptr<llvm::opt::Arg> Arg(OptTable.ParseOneArg(
167  ArgList, Pos,
168  /* Include */ ClangCLMode ? CoreOption | CLOption : 0,
169  /* Exclude */ ClangCLMode ? 0 : CLOption));
170 
171  if (!Arg)
172  continue;
173 
174  const llvm::opt::Option &Opt = Arg->getOption();
175 
176  // Strip input and output files.
177  if (Opt.matches(OPT_INPUT) || Opt.matches(OPT_o) ||
178  (ClangCLMode && (Opt.matches(OPT__SLASH_Fa) ||
179  Opt.matches(OPT__SLASH_Fe) ||
180  Opt.matches(OPT__SLASH_Fi) ||
181  Opt.matches(OPT__SLASH_Fo))))
182  continue;
183 
184  // ...including when the inputs are passed after --.
185  if (Opt.matches(OPT__DASH_DASH))
186  break;
187 
188  // Strip -x, but record the overridden language.
189  if (const auto GivenType = tryParseTypeArg(*Arg)) {
190  Type = *GivenType;
191  continue;
192  }
193 
194  // Strip -std, but record the value.
195  if (const auto GivenStd = tryParseStdArg(*Arg)) {
196  if (*GivenStd != LangStandard::lang_unspecified)
197  Std = *GivenStd;
198  continue;
199  }
200 
201  Cmd.CommandLine.insert(Cmd.CommandLine.end(),
202  OldArgs.data() + OldPos, OldArgs.data() + Pos);
203  }
204 
205  // Make use of -std iff -x was missing.
207  Type = toType(LangStandard::getLangStandardForKind(Std).getLanguage());
208  Type = foldType(*Type);
209  // The contract is to store None instead of TY_INVALID.
210  if (Type == types::TY_INVALID)
211  Type = llvm::None;
212  }
213 
214  // Produce a CompileCommand for \p filename, based on this one.
215  // (This consumes the TransferableCommand just to avoid copying Cmd).
216  CompileCommand transferTo(StringRef Filename) && {
217  CompileCommand Result = std::move(Cmd);
218  Result.Heuristic = "inferred from " + Result.Filename;
219  Result.Filename = std::string(Filename);
220  bool TypeCertain;
221  auto TargetType = guessType(Filename, &TypeCertain);
222  // If the filename doesn't determine the language (.h), transfer with -x.
223  if ((!TargetType || !TypeCertain) && Type) {
224  // Use *Type, or its header variant if the file is a header.
225  // Treat no/invalid extension as header (e.g. C++ standard library).
226  TargetType =
227  (!TargetType || types::onlyPrecompileType(TargetType)) // header?
229  : *Type;
230  if (ClangCLMode) {
231  const StringRef Flag = toCLFlag(TargetType);
232  if (!Flag.empty())
233  Result.CommandLine.push_back(std::string(Flag));
234  } else {
235  Result.CommandLine.push_back("-x");
236  Result.CommandLine.push_back(types::getTypeName(TargetType));
237  }
238  }
239  // --std flag may only be transferred if the language is the same.
240  // We may consider "translating" these, e.g. c++11 -> c11.
241  if (Std != LangStandard::lang_unspecified && foldType(TargetType) == Type) {
242  Result.CommandLine.emplace_back((
243  llvm::Twine(ClangCLMode ? "/std:" : "-std=") +
245  }
246  if (Filename.startswith("-") || (ClangCLMode && Filename.startswith("/")))
247  Result.CommandLine.push_back("--");
248  Result.CommandLine.push_back(std::string(Filename));
249  return Result;
250  }
251 
252 private:
253  // Map the language from the --std flag to that of the -x flag.
254  static types::ID toType(Language Lang) {
255  switch (Lang) {
256  case Language::C:
257  return types::TY_C;
258  case Language::CXX:
259  return types::TY_CXX;
260  case Language::ObjC:
261  return types::TY_ObjC;
262  case Language::ObjCXX:
263  return types::TY_ObjCXX;
264  default:
265  return types::TY_INVALID;
266  }
267  }
268 
269  // Convert a file type to the matching CL-style type flag.
270  static StringRef toCLFlag(types::ID Type) {
271  switch (Type) {
272  case types::TY_C:
273  case types::TY_CHeader:
274  return "/TC";
275  case types::TY_CXX:
276  case types::TY_CXXHeader:
277  return "/TP";
278  default:
279  return StringRef();
280  }
281  }
282 
283  // Try to interpret the argument as a type specifier, e.g. '-x'.
284  Optional<types::ID> tryParseTypeArg(const llvm::opt::Arg &Arg) {
285  const llvm::opt::Option &Opt = Arg.getOption();
286  using namespace driver::options;
287  if (ClangCLMode) {
288  if (Opt.matches(OPT__SLASH_TC) || Opt.matches(OPT__SLASH_Tc))
289  return types::TY_C;
290  if (Opt.matches(OPT__SLASH_TP) || Opt.matches(OPT__SLASH_Tp))
291  return types::TY_CXX;
292  } else {
293  if (Opt.matches(driver::options::OPT_x))
294  return types::lookupTypeForTypeSpecifier(Arg.getValue());
295  }
296  return None;
297  }
298 
299  // Try to interpret the argument as '-std='.
300  Optional<LangStandard::Kind> tryParseStdArg(const llvm::opt::Arg &Arg) {
301  using namespace driver::options;
302  if (Arg.getOption().matches(ClangCLMode ? OPT__SLASH_std : OPT_std_EQ))
303  return LangStandard::getLangKind(Arg.getValue());
304  return None;
305  }
306 };
307 
308 // Given a filename, FileIndex picks the best matching file from the underlying
309 // DB. This is the proxy file whose CompileCommand will be reused. The
310 // heuristics incorporate file name, extension, and directory structure.
311 // Strategy:
312 // - Build indexes of each of the substrings we want to look up by.
313 // These indexes are just sorted lists of the substrings.
314 // - Each criterion corresponds to a range lookup into the index, so we only
315 // need O(log N) string comparisons to determine scores.
316 //
317 // Apart from path proximity signals, also takes file extensions into account
318 // when scoring the candidates.
319 class FileIndex {
320 public:
321  FileIndex(std::vector<std::string> Files)
322  : OriginalPaths(std::move(Files)), Strings(Arena) {
323  // Sort commands by filename for determinism (index is a tiebreaker later).
324  llvm::sort(OriginalPaths);
325  Paths.reserve(OriginalPaths.size());
326  Types.reserve(OriginalPaths.size());
327  Stems.reserve(OriginalPaths.size());
328  for (size_t I = 0; I < OriginalPaths.size(); ++I) {
329  StringRef Path = Strings.save(StringRef(OriginalPaths[I]).lower());
330 
331  Paths.emplace_back(Path, I);
332  Types.push_back(foldType(guessType(Path)));
333  Stems.emplace_back(sys::path::stem(Path), I);
334  auto Dir = ++sys::path::rbegin(Path), DirEnd = sys::path::rend(Path);
335  for (int J = 0; J < DirectorySegmentsIndexed && Dir != DirEnd; ++J, ++Dir)
336  if (Dir->size() > ShortDirectorySegment) // not trivial ones
337  Components.emplace_back(*Dir, I);
338  }
339  llvm::sort(Paths);
340  llvm::sort(Stems);
341  llvm::sort(Components);
342  }
343 
344  bool empty() const { return Paths.empty(); }
345 
346  // Returns the path for the file that best fits OriginalFilename.
347  // Candidates with extensions matching PreferLanguage will be chosen over
348  // others (unless it's TY_INVALID, or all candidates are bad).
349  StringRef chooseProxy(StringRef OriginalFilename,
350  types::ID PreferLanguage) const {
351  assert(!empty() && "need at least one candidate!");
352  std::string Filename = OriginalFilename.lower();
353  auto Candidates = scoreCandidates(Filename);
354  std::pair<size_t, int> Best =
355  pickWinner(Candidates, Filename, PreferLanguage);
356 
357  DEBUG_WITH_TYPE(
358  "interpolate",
359  llvm::dbgs() << "interpolate: chose " << OriginalPaths[Best.first]
360  << " as proxy for " << OriginalFilename << " preferring "
361  << (PreferLanguage == types::TY_INVALID
362  ? "none"
363  : types::getTypeName(PreferLanguage))
364  << " score=" << Best.second << "\n");
365  return OriginalPaths[Best.first];
366  }
367 
368 private:
369  using SubstringAndIndex = std::pair<StringRef, size_t>;
370  // Directory matching parameters: we look at the last two segments of the
371  // parent directory (usually the semantically significant ones in practice).
372  // We search only the last four of each candidate (for efficiency).
373  constexpr static int DirectorySegmentsIndexed = 4;
374  constexpr static int DirectorySegmentsQueried = 2;
375  constexpr static int ShortDirectorySegment = 1; // Only look at longer names.
376 
377  // Award points to candidate entries that should be considered for the file.
378  // Returned keys are indexes into paths, and the values are (nonzero) scores.
379  DenseMap<size_t, int> scoreCandidates(StringRef Filename) const {
380  // Decompose Filename into the parts we care about.
381  // /some/path/complicated/project/Interesting.h
382  // [-prefix--][---dir---] [-dir-] [--stem---]
383  StringRef Stem = sys::path::stem(Filename);
385  llvm::StringRef Prefix;
386  auto Dir = ++sys::path::rbegin(Filename),
387  DirEnd = sys::path::rend(Filename);
388  for (int I = 0; I < DirectorySegmentsQueried && Dir != DirEnd; ++I, ++Dir) {
389  if (Dir->size() > ShortDirectorySegment)
390  Dirs.push_back(*Dir);
391  Prefix = Filename.substr(0, Dir - DirEnd);
392  }
393 
394  // Now award points based on lookups into our various indexes.
395  DenseMap<size_t, int> Candidates; // Index -> score.
396  auto Award = [&](int Points, ArrayRef<SubstringAndIndex> Range) {
397  for (const auto &Entry : Range)
398  Candidates[Entry.second] += Points;
399  };
400  // Award one point if the file's basename is a prefix of the candidate,
401  // and another if it's an exact match (so exact matches get two points).
402  Award(1, indexLookup</*Prefix=*/true>(Stem, Stems));
403  Award(1, indexLookup</*Prefix=*/false>(Stem, Stems));
404  // For each of the last few directories in the Filename, award a point
405  // if it's present in the candidate.
406  for (StringRef Dir : Dirs)
407  Award(1, indexLookup</*Prefix=*/false>(Dir, Components));
408  // Award one more point if the whole rest of the path matches.
409  if (sys::path::root_directory(Prefix) != Prefix)
410  Award(1, indexLookup</*Prefix=*/true>(Prefix, Paths));
411  return Candidates;
412  }
413 
414  // Pick a single winner from the set of scored candidates.
415  // Returns (index, score).
416  std::pair<size_t, int> pickWinner(const DenseMap<size_t, int> &Candidates,
417  StringRef Filename,
418  types::ID PreferredLanguage) const {
419  struct ScoredCandidate {
420  size_t Index;
421  bool Preferred;
422  int Points;
423  size_t PrefixLength;
424  };
425  // Choose the best candidate by (preferred, points, prefix length, alpha).
426  ScoredCandidate Best = {size_t(-1), false, 0, 0};
427  for (const auto &Candidate : Candidates) {
428  ScoredCandidate S;
429  S.Index = Candidate.first;
430  S.Preferred = PreferredLanguage == types::TY_INVALID ||
431  PreferredLanguage == Types[S.Index];
432  S.Points = Candidate.second;
433  if (!S.Preferred && Best.Preferred)
434  continue;
435  if (S.Preferred == Best.Preferred) {
436  if (S.Points < Best.Points)
437  continue;
438  if (S.Points == Best.Points) {
439  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
440  if (S.PrefixLength < Best.PrefixLength)
441  continue;
442  // hidden heuristics should at least be deterministic!
443  if (S.PrefixLength == Best.PrefixLength)
444  if (S.Index > Best.Index)
445  continue;
446  }
447  }
448  // PrefixLength was only set above if actually needed for a tiebreak.
449  // But it definitely needs to be set to break ties in the future.
450  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
451  Best = S;
452  }
453  // Edge case: no candidate got any points.
454  // We ignore PreferredLanguage at this point (not ideal).
455  if (Best.Index == size_t(-1))
456  return {longestMatch(Filename, Paths).second, 0};
457  return {Best.Index, Best.Points};
458  }
459 
460  // Returns the range within a sorted index that compares equal to Key.
461  // If Prefix is true, it's instead the range starting with Key.
462  template <bool Prefix>
464  indexLookup(StringRef Key, ArrayRef<SubstringAndIndex> Idx) const {
465  // Use pointers as iteratiors to ease conversion of result to ArrayRef.
466  auto Range = std::equal_range(Idx.data(), Idx.data() + Idx.size(), Key,
467  Less<Prefix>());
468  return {Range.first, Range.second};
469  }
470 
471  // Performs a point lookup into a nonempty index, returning a longest match.
472  SubstringAndIndex longestMatch(StringRef Key,
473  ArrayRef<SubstringAndIndex> Idx) const {
474  assert(!Idx.empty());
475  // Longest substring match will be adjacent to a direct lookup.
476  auto It = llvm::lower_bound(Idx, SubstringAndIndex{Key, 0});
477  if (It == Idx.begin())
478  return *It;
479  if (It == Idx.end())
480  return *--It;
481  // Have to choose between It and It-1
482  size_t Prefix = matchingPrefix(Key, It->first);
483  size_t PrevPrefix = matchingPrefix(Key, (It - 1)->first);
484  return Prefix > PrevPrefix ? *It : *--It;
485  }
486 
487  // Original paths, everything else is in lowercase.
488  std::vector<std::string> OriginalPaths;
489  BumpPtrAllocator Arena;
490  StringSaver Strings;
491  // Indexes of candidates by certain substrings.
492  // String is lowercase and sorted, index points into OriginalPaths.
493  std::vector<SubstringAndIndex> Paths; // Full path.
494  // Lang types obtained by guessing on the corresponding path. I-th element is
495  // a type for the I-th path.
496  std::vector<types::ID> Types;
497  std::vector<SubstringAndIndex> Stems; // Basename, without extension.
498  std::vector<SubstringAndIndex> Components; // Last path components.
499 };
500 
501 // The actual CompilationDatabase wrapper delegates to its inner database.
502 // If no match, looks up a proxy file in FileIndex and transfers its
503 // command to the requested file.
504 class InterpolatingCompilationDatabase : public CompilationDatabase {
505 public:
506  InterpolatingCompilationDatabase(std::unique_ptr<CompilationDatabase> Inner)
507  : Inner(std::move(Inner)), Index(this->Inner->getAllFiles()) {}
508 
509  std::vector<CompileCommand>
510  getCompileCommands(StringRef Filename) const override {
511  auto Known = Inner->getCompileCommands(Filename);
512  if (Index.empty() || !Known.empty())
513  return Known;
514  bool TypeCertain;
515  auto Lang = guessType(Filename, &TypeCertain);
516  if (!TypeCertain)
517  Lang = types::TY_INVALID;
518  auto ProxyCommands =
519  Inner->getCompileCommands(Index.chooseProxy(Filename, foldType(Lang)));
520  if (ProxyCommands.empty())
521  return {};
522  return {transferCompileCommand(std::move(ProxyCommands.front()), Filename)};
523  }
524 
525  std::vector<std::string> getAllFiles() const override {
526  return Inner->getAllFiles();
527  }
528 
529  std::vector<CompileCommand> getAllCompileCommands() const override {
530  return Inner->getAllCompileCommands();
531  }
532 
533 private:
534  std::unique_ptr<CompilationDatabase> Inner;
535  FileIndex Index;
536 };
537 
538 } // namespace
539 
540 std::unique_ptr<CompilationDatabase>
541 inferMissingCompileCommands(std::unique_ptr<CompilationDatabase> Inner) {
542  return std::make_unique<InterpolatingCompilationDatabase>(std::move(Inner));
543 }
544 
546  StringRef Filename) {
547  return TransferableCommand(std::move(Cmd)).transferTo(Filename);
548 }
549 
550 } // namespace tooling
551 } // namespace clang
llvm
Definition: Dominators.h:30
Driver.h
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llvm::SmallVector
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StringRef Filename
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llvm::Optional
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ID lookupTypeForExtension(llvm::StringRef Ext)
lookupTypeForExtension - Lookup the type to use for the file extension Ext.
Definition: Types.cpp:273
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static Kind getLangKind(StringRef Name)
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V
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__DEVICE__ int min(int __a, int __b)
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const llvm::opt::OptTable & getDriverOptTable()
Definition: DriverOptions.cpp:42
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constexpr XRayInstrMask None
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Specifies the working directory and command of a compilation.
Definition: CompilationDatabase.h:44
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ID lookupTypeForTypeSpecifier(const char *Name)
lookupTypeForTypSpecifier - Lookup the type to use for a user specified type name.
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Std
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Definition: InterpolatingCompilationDatabase.cpp:134
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@ TY_INVALID
Definition: Types.h:24
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Definition: InterpolatingCompilationDatabase.cpp:136
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@ Less
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std::unique_ptr< CompilationDatabase > inferMissingCompileCommands(std::unique_ptr< CompilationDatabase >)
Returns a wrapped CompilationDatabase that defers to the provided one, but getCompileCommands() will ...
Definition: InterpolatingCompilationDatabase.cpp:541
getName
static std::string getName(const CallEvent &Call)
Definition: ReturnValueChecker.cpp:60
Cmd
CompileCommand Cmd
Definition: InterpolatingCompilationDatabase.cpp:130
clang::tooling::transferCompileCommand
tooling::CompileCommand transferCompileCommand(tooling::CompileCommand, StringRef Filename)
Transforms a compile command so that it applies the same configuration to a different file.
Definition: InterpolatingCompilationDatabase.cpp:545
clang::transformer::EditKind::Range
@ Range
clang::Language
Language
The language for the input, used to select and validate the language standard and possible actions.
Definition: LangStandard.h:19
LangStandard.h
clang::Language::CXX
@ CXX
clang::Language::ObjCXX
@ ObjCXX
llvm::ArrayRef
Definition: LLVM.h:34
Value
Value
Definition: UninitializedValues.cpp:102
clang::Language::ObjC
@ ObjC
clang::driver::types::ID
ID
Definition: Types.h:23
clang::LangStandard::lang_unspecified
@ lang_unspecified
Definition: LangStandard.h:68
std
Definition: Format.h:4034
clang::driver::types
Definition: Types.h:22
clang
Definition: CalledOnceCheck.h:17
clang::driver::options::CLOption
@ CLOption
Definition: Options.h:30
clang::driver::IsClangCL
bool IsClangCL(StringRef DriverMode)
Checks whether the value produced by getDriverMode is for CL mode.
Definition: Driver.cpp:5599
Types.h
CompilationDatabase.h
clang::driver::getDriverMode
llvm::StringRef getDriverMode(StringRef ProgName, ArrayRef< const char * > Args)
Returns the driver mode option's value, i.e.
Definition: Driver.cpp:5584
clang::LangStandard::getLangStandardForKind
static const LangStandard & getLangStandardForKind(Kind K)
Definition: LangStandards.cpp:18
clang::driver::options::CoreOption
@ CoreOption
Definition: Options.h:29
clang::driver::types::getTypeName
const char * getTypeName(ID Id)
getTypeName - Return the name of the type for Id.
Definition: Types.cpp:52
clang::driver::types::lookupHeaderTypeForSourceType
ID lookupHeaderTypeForSourceType(ID Id)
Lookup header file input type that corresponds to given source file type (used for clang-cl emulation...
Definition: Types.cpp:384
Type
MatchType Type
Definition: ASTMatchFinder.cpp:70