clang  13.0.0git
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/Options.h"
47 #include "clang/Driver/Types.h"
49 #include "llvm/ADT/DenseMap.h"
50 #include "llvm/ADT/Optional.h"
51 #include "llvm/ADT/StringExtras.h"
52 #include "llvm/ADT/StringSwitch.h"
53 #include "llvm/Option/ArgList.h"
54 #include "llvm/Option/OptTable.h"
55 #include "llvm/Support/Debug.h"
56 #include "llvm/Support/Path.h"
57 #include "llvm/Support/StringSaver.h"
58 #include "llvm/Support/raw_ostream.h"
59 #include <memory>
60 
61 namespace clang {
62 namespace tooling {
63 namespace {
64 using namespace llvm;
65 namespace types = clang::driver::types;
66 namespace path = llvm::sys::path;
67 
68 // The length of the prefix these two strings have in common.
69 size_t matchingPrefix(StringRef L, StringRef R) {
70  size_t Limit = std::min(L.size(), R.size());
71  for (size_t I = 0; I < Limit; ++I)
72  if (L[I] != R[I])
73  return I;
74  return Limit;
75 }
76 
77 // A comparator for searching SubstringWithIndexes with std::equal_range etc.
78 // Optionaly prefix semantics: compares equal if the key is a prefix.
79 template <bool Prefix> struct Less {
80  bool operator()(StringRef Key, std::pair<StringRef, size_t> Value) const {
81  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
82  return Key < V;
83  }
84  bool operator()(std::pair<StringRef, size_t> Value, StringRef Key) const {
85  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
86  return V < Key;
87  }
88 };
89 
90 // Infer type from filename. If we might have gotten it wrong, set *Certain.
91 // *.h will be inferred as a C header, but not certain.
92 types::ID guessType(StringRef Filename, bool *Certain = nullptr) {
93  // path::extension is ".cpp", lookupTypeForExtension wants "cpp".
94  auto Lang =
95  types::lookupTypeForExtension(path::extension(Filename).substr(1));
96  if (Certain)
97  *Certain = Lang != types::TY_CHeader && Lang != types::TY_INVALID;
98  return Lang;
99 }
100 
101 // Return Lang as one of the canonical supported types.
102 // e.g. c-header --> c; fortran --> TY_INVALID
103 static types::ID foldType(types::ID Lang) {
104  switch (Lang) {
105  case types::TY_C:
106  case types::TY_CHeader:
107  return types::TY_C;
108  case types::TY_ObjC:
109  case types::TY_ObjCHeader:
110  return types::TY_ObjC;
111  case types::TY_CXX:
112  case types::TY_CXXHeader:
113  return types::TY_CXX;
114  case types::TY_ObjCXX:
115  case types::TY_ObjCXXHeader:
116  return types::TY_ObjCXX;
117  case types::TY_CUDA:
118  case types::TY_CUDA_DEVICE:
119  return types::TY_CUDA;
120  default:
121  return types::TY_INVALID;
122  }
123 }
124 
125 // A CompileCommand that can be applied to another file.
126 struct TransferableCommand {
127  // Flags that should not apply to all files are stripped from CommandLine.
128  CompileCommand Cmd;
129  // Language detected from -x or the filename. Never TY_INVALID.
131  // Standard specified by -std.
133  // Whether the command line is for the cl-compatible driver.
135 
136  TransferableCommand(CompileCommand C)
137  : Cmd(std::move(C)), Type(guessType(Cmd.Filename)),
138  ClangCLMode(checkIsCLMode(Cmd.CommandLine)) {
139  std::vector<std::string> OldArgs = std::move(Cmd.CommandLine);
140  Cmd.CommandLine.clear();
141 
142  // Wrap the old arguments in an InputArgList.
143  llvm::opt::InputArgList ArgList;
144  {
146  for (const std::string &S : OldArgs)
147  TmpArgv.push_back(S.c_str());
148  ArgList = {TmpArgv.begin(), TmpArgv.end()};
149  }
150 
151  // Parse the old args in order to strip out and record unwanted flags.
152  // We parse each argument individually so that we can retain the exact
153  // spelling of each argument; re-rendering is lossy for aliased flags.
154  // E.g. in CL mode, /W4 maps to -Wall.
155  auto &OptTable = clang::driver::getDriverOptTable();
156  if (!OldArgs.empty())
157  Cmd.CommandLine.emplace_back(OldArgs.front());
158  for (unsigned Pos = 1; Pos < OldArgs.size();) {
159  using namespace driver::options;
160 
161  const unsigned OldPos = Pos;
162  std::unique_ptr<llvm::opt::Arg> Arg(OptTable.ParseOneArg(
163  ArgList, Pos,
164  /* Include */ ClangCLMode ? CoreOption | CLOption : 0,
165  /* Exclude */ ClangCLMode ? 0 : CLOption));
166 
167  if (!Arg)
168  continue;
169 
170  const llvm::opt::Option &Opt = Arg->getOption();
171 
172  // Strip input and output files.
173  if (Opt.matches(OPT_INPUT) || Opt.matches(OPT_o) ||
174  (ClangCLMode && (Opt.matches(OPT__SLASH_Fa) ||
175  Opt.matches(OPT__SLASH_Fe) ||
176  Opt.matches(OPT__SLASH_Fi) ||
177  Opt.matches(OPT__SLASH_Fo))))
178  continue;
179 
180  // ...including when the inputs are passed after --.
181  if (Opt.matches(OPT__DASH_DASH))
182  break;
183 
184  // Strip -x, but record the overridden language.
185  if (const auto GivenType = tryParseTypeArg(*Arg)) {
186  Type = *GivenType;
187  continue;
188  }
189 
190  // Strip -std, but record the value.
191  if (const auto GivenStd = tryParseStdArg(*Arg)) {
192  if (*GivenStd != LangStandard::lang_unspecified)
193  Std = *GivenStd;
194  continue;
195  }
196 
197  Cmd.CommandLine.insert(Cmd.CommandLine.end(),
198  OldArgs.data() + OldPos, OldArgs.data() + Pos);
199  }
200 
201  // Make use of -std iff -x was missing.
203  Type = toType(LangStandard::getLangStandardForKind(Std).getLanguage());
204  Type = foldType(*Type);
205  // The contract is to store None instead of TY_INVALID.
206  if (Type == types::TY_INVALID)
207  Type = llvm::None;
208  }
209 
210  // Produce a CompileCommand for \p filename, based on this one.
211  // (This consumes the TransferableCommand just to avoid copying Cmd).
212  CompileCommand transferTo(StringRef Filename) && {
213  CompileCommand Result = std::move(Cmd);
214  Result.Heuristic = "inferred from " + Result.Filename;
215  Result.Filename = std::string(Filename);
216  bool TypeCertain;
217  auto TargetType = guessType(Filename, &TypeCertain);
218  // If the filename doesn't determine the language (.h), transfer with -x.
219  if ((!TargetType || !TypeCertain) && Type) {
220  // Use *Type, or its header variant if the file is a header.
221  // Treat no/invalid extension as header (e.g. C++ standard library).
222  TargetType =
223  (!TargetType || types::onlyPrecompileType(TargetType)) // header?
225  : *Type;
226  if (ClangCLMode) {
227  const StringRef Flag = toCLFlag(TargetType);
228  if (!Flag.empty())
229  Result.CommandLine.push_back(std::string(Flag));
230  } else {
231  Result.CommandLine.push_back("-x");
232  Result.CommandLine.push_back(types::getTypeName(TargetType));
233  }
234  }
235  // --std flag may only be transferred if the language is the same.
236  // We may consider "translating" these, e.g. c++11 -> c11.
237  if (Std != LangStandard::lang_unspecified && foldType(TargetType) == Type) {
238  Result.CommandLine.emplace_back((
239  llvm::Twine(ClangCLMode ? "/std:" : "-std=") +
241  }
242  if (Filename.startswith("-") || (ClangCLMode && Filename.startswith("/")))
243  Result.CommandLine.push_back("--");
244  Result.CommandLine.push_back(std::string(Filename));
245  return Result;
246  }
247 
248 private:
249  // Determine whether the given command line is intended for the CL driver.
250  static bool checkIsCLMode(ArrayRef<std::string> CmdLine) {
251  // First look for --driver-mode.
252  for (StringRef S : llvm::reverse(CmdLine)) {
253  if (S.consume_front("--driver-mode="))
254  return S == "cl";
255  }
256 
257  // Otherwise just check the clang executable file name.
258  return !CmdLine.empty() &&
259  llvm::sys::path::stem(CmdLine.front()).endswith_lower("cl");
260  }
261 
262  // Map the language from the --std flag to that of the -x flag.
263  static types::ID toType(Language Lang) {
264  switch (Lang) {
265  case Language::C:
266  return types::TY_C;
267  case Language::CXX:
268  return types::TY_CXX;
269  case Language::ObjC:
270  return types::TY_ObjC;
271  case Language::ObjCXX:
272  return types::TY_ObjCXX;
273  default:
274  return types::TY_INVALID;
275  }
276  }
277 
278  // Convert a file type to the matching CL-style type flag.
279  static StringRef toCLFlag(types::ID Type) {
280  switch (Type) {
281  case types::TY_C:
282  case types::TY_CHeader:
283  return "/TC";
284  case types::TY_CXX:
285  case types::TY_CXXHeader:
286  return "/TP";
287  default:
288  return StringRef();
289  }
290  }
291 
292  // Try to interpret the argument as a type specifier, e.g. '-x'.
293  Optional<types::ID> tryParseTypeArg(const llvm::opt::Arg &Arg) {
294  const llvm::opt::Option &Opt = Arg.getOption();
295  using namespace driver::options;
296  if (ClangCLMode) {
297  if (Opt.matches(OPT__SLASH_TC) || Opt.matches(OPT__SLASH_Tc))
298  return types::TY_C;
299  if (Opt.matches(OPT__SLASH_TP) || Opt.matches(OPT__SLASH_Tp))
300  return types::TY_CXX;
301  } else {
302  if (Opt.matches(driver::options::OPT_x))
303  return types::lookupTypeForTypeSpecifier(Arg.getValue());
304  }
305  return None;
306  }
307 
308  // Try to interpret the argument as '-std='.
309  Optional<LangStandard::Kind> tryParseStdArg(const llvm::opt::Arg &Arg) {
310  using namespace driver::options;
311  if (Arg.getOption().matches(ClangCLMode ? OPT__SLASH_std : OPT_std_EQ))
312  return LangStandard::getLangKind(Arg.getValue());
313  return None;
314  }
315 };
316 
317 // Given a filename, FileIndex picks the best matching file from the underlying
318 // DB. This is the proxy file whose CompileCommand will be reused. The
319 // heuristics incorporate file name, extension, and directory structure.
320 // Strategy:
321 // - Build indexes of each of the substrings we want to look up by.
322 // These indexes are just sorted lists of the substrings.
323 // - Each criterion corresponds to a range lookup into the index, so we only
324 // need O(log N) string comparisons to determine scores.
325 //
326 // Apart from path proximity signals, also takes file extensions into account
327 // when scoring the candidates.
328 class FileIndex {
329 public:
330  FileIndex(std::vector<std::string> Files)
331  : OriginalPaths(std::move(Files)), Strings(Arena) {
332  // Sort commands by filename for determinism (index is a tiebreaker later).
333  llvm::sort(OriginalPaths);
334  Paths.reserve(OriginalPaths.size());
335  Types.reserve(OriginalPaths.size());
336  Stems.reserve(OriginalPaths.size());
337  for (size_t I = 0; I < OriginalPaths.size(); ++I) {
338  StringRef Path = Strings.save(StringRef(OriginalPaths[I]).lower());
339 
340  Paths.emplace_back(Path, I);
341  Types.push_back(foldType(guessType(Path)));
342  Stems.emplace_back(sys::path::stem(Path), I);
343  auto Dir = ++sys::path::rbegin(Path), DirEnd = sys::path::rend(Path);
344  for (int J = 0; J < DirectorySegmentsIndexed && Dir != DirEnd; ++J, ++Dir)
345  if (Dir->size() > ShortDirectorySegment) // not trivial ones
346  Components.emplace_back(*Dir, I);
347  }
348  llvm::sort(Paths);
349  llvm::sort(Stems);
350  llvm::sort(Components);
351  }
352 
353  bool empty() const { return Paths.empty(); }
354 
355  // Returns the path for the file that best fits OriginalFilename.
356  // Candidates with extensions matching PreferLanguage will be chosen over
357  // others (unless it's TY_INVALID, or all candidates are bad).
358  StringRef chooseProxy(StringRef OriginalFilename,
359  types::ID PreferLanguage) const {
360  assert(!empty() && "need at least one candidate!");
361  std::string Filename = OriginalFilename.lower();
362  auto Candidates = scoreCandidates(Filename);
363  std::pair<size_t, int> Best =
364  pickWinner(Candidates, Filename, PreferLanguage);
365 
366  DEBUG_WITH_TYPE(
367  "interpolate",
368  llvm::dbgs() << "interpolate: chose " << OriginalPaths[Best.first]
369  << " as proxy for " << OriginalFilename << " preferring "
370  << (PreferLanguage == types::TY_INVALID
371  ? "none"
372  : types::getTypeName(PreferLanguage))
373  << " score=" << Best.second << "\n");
374  return OriginalPaths[Best.first];
375  }
376 
377 private:
378  using SubstringAndIndex = std::pair<StringRef, size_t>;
379  // Directory matching parameters: we look at the last two segments of the
380  // parent directory (usually the semantically significant ones in practice).
381  // We search only the last four of each candidate (for efficiency).
382  constexpr static int DirectorySegmentsIndexed = 4;
383  constexpr static int DirectorySegmentsQueried = 2;
384  constexpr static int ShortDirectorySegment = 1; // Only look at longer names.
385 
386  // Award points to candidate entries that should be considered for the file.
387  // Returned keys are indexes into paths, and the values are (nonzero) scores.
388  DenseMap<size_t, int> scoreCandidates(StringRef Filename) const {
389  // Decompose Filename into the parts we care about.
390  // /some/path/complicated/project/Interesting.h
391  // [-prefix--][---dir---] [-dir-] [--stem---]
392  StringRef Stem = sys::path::stem(Filename);
394  llvm::StringRef Prefix;
395  auto Dir = ++sys::path::rbegin(Filename),
396  DirEnd = sys::path::rend(Filename);
397  for (int I = 0; I < DirectorySegmentsQueried && Dir != DirEnd; ++I, ++Dir) {
398  if (Dir->size() > ShortDirectorySegment)
399  Dirs.push_back(*Dir);
400  Prefix = Filename.substr(0, Dir - DirEnd);
401  }
402 
403  // Now award points based on lookups into our various indexes.
404  DenseMap<size_t, int> Candidates; // Index -> score.
405  auto Award = [&](int Points, ArrayRef<SubstringAndIndex> Range) {
406  for (const auto &Entry : Range)
407  Candidates[Entry.second] += Points;
408  };
409  // Award one point if the file's basename is a prefix of the candidate,
410  // and another if it's an exact match (so exact matches get two points).
411  Award(1, indexLookup</*Prefix=*/true>(Stem, Stems));
412  Award(1, indexLookup</*Prefix=*/false>(Stem, Stems));
413  // For each of the last few directories in the Filename, award a point
414  // if it's present in the candidate.
415  for (StringRef Dir : Dirs)
416  Award(1, indexLookup</*Prefix=*/false>(Dir, Components));
417  // Award one more point if the whole rest of the path matches.
418  if (sys::path::root_directory(Prefix) != Prefix)
419  Award(1, indexLookup</*Prefix=*/true>(Prefix, Paths));
420  return Candidates;
421  }
422 
423  // Pick a single winner from the set of scored candidates.
424  // Returns (index, score).
425  std::pair<size_t, int> pickWinner(const DenseMap<size_t, int> &Candidates,
426  StringRef Filename,
427  types::ID PreferredLanguage) const {
428  struct ScoredCandidate {
429  size_t Index;
430  bool Preferred;
431  int Points;
432  size_t PrefixLength;
433  };
434  // Choose the best candidate by (preferred, points, prefix length, alpha).
435  ScoredCandidate Best = {size_t(-1), false, 0, 0};
436  for (const auto &Candidate : Candidates) {
437  ScoredCandidate S;
438  S.Index = Candidate.first;
439  S.Preferred = PreferredLanguage == types::TY_INVALID ||
440  PreferredLanguage == Types[S.Index];
441  S.Points = Candidate.second;
442  if (!S.Preferred && Best.Preferred)
443  continue;
444  if (S.Preferred == Best.Preferred) {
445  if (S.Points < Best.Points)
446  continue;
447  if (S.Points == Best.Points) {
448  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
449  if (S.PrefixLength < Best.PrefixLength)
450  continue;
451  // hidden heuristics should at least be deterministic!
452  if (S.PrefixLength == Best.PrefixLength)
453  if (S.Index > Best.Index)
454  continue;
455  }
456  }
457  // PrefixLength was only set above if actually needed for a tiebreak.
458  // But it definitely needs to be set to break ties in the future.
459  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
460  Best = S;
461  }
462  // Edge case: no candidate got any points.
463  // We ignore PreferredLanguage at this point (not ideal).
464  if (Best.Index == size_t(-1))
465  return {longestMatch(Filename, Paths).second, 0};
466  return {Best.Index, Best.Points};
467  }
468 
469  // Returns the range within a sorted index that compares equal to Key.
470  // If Prefix is true, it's instead the range starting with Key.
471  template <bool Prefix>
473  indexLookup(StringRef Key, ArrayRef<SubstringAndIndex> Idx) const {
474  // Use pointers as iteratiors to ease conversion of result to ArrayRef.
475  auto Range = std::equal_range(Idx.data(), Idx.data() + Idx.size(), Key,
476  Less<Prefix>());
477  return {Range.first, Range.second};
478  }
479 
480  // Performs a point lookup into a nonempty index, returning a longest match.
481  SubstringAndIndex longestMatch(StringRef Key,
482  ArrayRef<SubstringAndIndex> Idx) const {
483  assert(!Idx.empty());
484  // Longest substring match will be adjacent to a direct lookup.
485  auto It = llvm::lower_bound(Idx, SubstringAndIndex{Key, 0});
486  if (It == Idx.begin())
487  return *It;
488  if (It == Idx.end())
489  return *--It;
490  // Have to choose between It and It-1
491  size_t Prefix = matchingPrefix(Key, It->first);
492  size_t PrevPrefix = matchingPrefix(Key, (It - 1)->first);
493  return Prefix > PrevPrefix ? *It : *--It;
494  }
495 
496  // Original paths, everything else is in lowercase.
497  std::vector<std::string> OriginalPaths;
498  BumpPtrAllocator Arena;
499  StringSaver Strings;
500  // Indexes of candidates by certain substrings.
501  // String is lowercase and sorted, index points into OriginalPaths.
502  std::vector<SubstringAndIndex> Paths; // Full path.
503  // Lang types obtained by guessing on the corresponding path. I-th element is
504  // a type for the I-th path.
505  std::vector<types::ID> Types;
506  std::vector<SubstringAndIndex> Stems; // Basename, without extension.
507  std::vector<SubstringAndIndex> Components; // Last path components.
508 };
509 
510 // The actual CompilationDatabase wrapper delegates to its inner database.
511 // If no match, looks up a proxy file in FileIndex and transfers its
512 // command to the requested file.
513 class InterpolatingCompilationDatabase : public CompilationDatabase {
514 public:
515  InterpolatingCompilationDatabase(std::unique_ptr<CompilationDatabase> Inner)
516  : Inner(std::move(Inner)), Index(this->Inner->getAllFiles()) {}
517 
518  std::vector<CompileCommand>
519  getCompileCommands(StringRef Filename) const override {
520  auto Known = Inner->getCompileCommands(Filename);
521  if (Index.empty() || !Known.empty())
522  return Known;
523  bool TypeCertain;
524  auto Lang = guessType(Filename, &TypeCertain);
525  if (!TypeCertain)
526  Lang = types::TY_INVALID;
527  auto ProxyCommands =
528  Inner->getCompileCommands(Index.chooseProxy(Filename, foldType(Lang)));
529  if (ProxyCommands.empty())
530  return {};
531  return {transferCompileCommand(std::move(ProxyCommands.front()), Filename)};
532  }
533 
534  std::vector<std::string> getAllFiles() const override {
535  return Inner->getAllFiles();
536  }
537 
538  std::vector<CompileCommand> getAllCompileCommands() const override {
539  return Inner->getAllCompileCommands();
540  }
541 
542 private:
543  std::unique_ptr<CompilationDatabase> Inner;
544  FileIndex Index;
545 };
546 
547 } // namespace
548 
549 std::unique_ptr<CompilationDatabase>
550 inferMissingCompileCommands(std::unique_ptr<CompilationDatabase> Inner) {
551  return std::make_unique<InterpolatingCompilationDatabase>(std::move(Inner));
552 }
553 
555  StringRef Filename) {
556  return TransferableCommand(std::move(Cmd)).transferTo(Filename);
557 }
558 
559 } // namespace tooling
560 } // namespace clang
llvm
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Definition: InterpolatingCompilationDatabase.cpp:132
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bool ClangCLMode
Definition: InterpolatingCompilationDatabase.cpp:134
clang::ComparisonCategoryResult::Less
@ Less
clang::Language::C
@ C
Languages that the frontend can parse and compile.
clang::tooling::inferMissingCompileCommands
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:550
getName
static std::string getName(const CallEvent &Call)
Definition: ReturnValueChecker.cpp:60
Cmd
CompileCommand Cmd
Definition: InterpolatingCompilationDatabase.cpp:128
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:554
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< std::string >
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:3629
clang::driver::types
Definition: Types.h:22
clang
Dataflow Directional Tag Classes.
Definition: CalledOnceCheck.h:17
clang::driver::options::CLOption
@ CLOption
Definition: Options.h:32
Types.h
CompilationDatabase.h
clang::LangStandard::getLangStandardForKind
static const LangStandard & getLangStandardForKind(Kind K)
Definition: LangStandards.cpp:18
clang::driver::options::CoreOption
@ CoreOption
Definition: Options.h:31
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