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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/Option/ArgList.h"
55 #include "llvm/Option/OptTable.h"
56 #include "llvm/Support/Debug.h"
57 #include "llvm/Support/Path.h"
58 #include "llvm/Support/StringSaver.h"
59 #include "llvm/Support/raw_ostream.h"
60 #include <memory>
61 
62 namespace clang {
63 namespace tooling {
64 namespace {
65 using namespace llvm;
66 namespace types = clang::driver::types;
67 namespace path = llvm::sys::path;
68 
69 // The length of the prefix these two strings have in common.
70 size_t matchingPrefix(StringRef L, StringRef R) {
71  size_t Limit = std::min(L.size(), R.size());
72  for (size_t I = 0; I < Limit; ++I)
73  if (L[I] != R[I])
74  return I;
75  return Limit;
76 }
77 
78 // A comparator for searching SubstringWithIndexes with std::equal_range etc.
79 // Optionaly prefix semantics: compares equal if the key is a prefix.
80 template <bool Prefix> struct Less {
81  bool operator()(StringRef Key, std::pair<StringRef, size_t> Value) const {
82  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
83  return Key < V;
84  }
85  bool operator()(std::pair<StringRef, size_t> Value, StringRef Key) const {
86  StringRef V = Prefix ? Value.first.substr(0, Key.size()) : Value.first;
87  return V < Key;
88  }
89 };
90 
91 // Infer type from filename. If we might have gotten it wrong, set *Certain.
92 // *.h will be inferred as a C header, but not certain.
93 types::ID guessType(StringRef Filename, bool *Certain = nullptr) {
94  // path::extension is ".cpp", lookupTypeForExtension wants "cpp".
95  auto Lang =
96  types::lookupTypeForExtension(path::extension(Filename).substr(1));
97  if (Certain)
98  *Certain = Lang != types::TY_CHeader && Lang != types::TY_INVALID;
99  return Lang;
100 }
101 
102 // Return Lang as one of the canonical supported types.
103 // e.g. c-header --> c; fortran --> TY_INVALID
104 static types::ID foldType(types::ID Lang) {
105  switch (Lang) {
106  case types::TY_C:
107  case types::TY_CHeader:
108  return types::TY_C;
109  case types::TY_ObjC:
110  case types::TY_ObjCHeader:
111  return types::TY_ObjC;
112  case types::TY_CXX:
113  case types::TY_CXXHeader:
114  return types::TY_CXX;
115  case types::TY_ObjCXX:
116  case types::TY_ObjCXXHeader:
117  return types::TY_ObjCXX;
118  case types::TY_CUDA:
119  case types::TY_CUDA_DEVICE:
120  return types::TY_CUDA;
121  default:
122  return types::TY_INVALID;
123  }
124 }
125 
126 // A CompileCommand that can be applied to another file.
127 struct TransferableCommand {
128  // Flags that should not apply to all files are stripped from CommandLine.
129  CompileCommand Cmd;
130  // Language detected from -x or the filename. Never TY_INVALID.
132  // Standard specified by -std.
134  // Whether the command line is for the cl-compatible driver.
136 
137  TransferableCommand(CompileCommand C)
138  : Cmd(std::move(C)), Type(guessType(Cmd.Filename)) {
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  ClangCLMode = !TmpArgv.empty() &&
150  TmpArgv.front(), llvm::makeArrayRef(TmpArgv).slice(1)));
151  ArgList = {TmpArgv.begin(), TmpArgv.end()};
152  }
153 
154  // Parse the old args in order to strip out and record unwanted flags.
155  // We parse each argument individually so that we can retain the exact
156  // spelling of each argument; re-rendering is lossy for aliased flags.
157  // E.g. in CL mode, /W4 maps to -Wall.
158  auto &OptTable = clang::driver::getDriverOptTable();
159  if (!OldArgs.empty())
160  Cmd.CommandLine.emplace_back(OldArgs.front());
161  for (unsigned Pos = 1; Pos < OldArgs.size();) {
162  using namespace driver::options;
163 
164  const unsigned OldPos = Pos;
165  std::unique_ptr<llvm::opt::Arg> Arg(OptTable.ParseOneArg(
166  ArgList, Pos,
167  /* Include */ ClangCLMode ? CoreOption | CLOption | CLDXCOption : 0,
168  /* Exclude */ ClangCLMode ? 0 : CLOption | CLDXCOption));
169 
170  if (!Arg)
171  continue;
172 
173  const llvm::opt::Option &Opt = Arg->getOption();
174 
175  // Strip input and output files.
176  if (Opt.matches(OPT_INPUT) || Opt.matches(OPT_o) ||
177  (ClangCLMode && (Opt.matches(OPT__SLASH_Fa) ||
178  Opt.matches(OPT__SLASH_Fe) ||
179  Opt.matches(OPT__SLASH_Fi) ||
180  Opt.matches(OPT__SLASH_Fo))))
181  continue;
182 
183  // ...including when the inputs are passed after --.
184  if (Opt.matches(OPT__DASH_DASH))
185  break;
186 
187  // Strip -x, but record the overridden language.
188  if (const auto GivenType = tryParseTypeArg(*Arg)) {
189  Type = *GivenType;
190  continue;
191  }
192 
193  // Strip -std, but record the value.
194  if (const auto GivenStd = tryParseStdArg(*Arg)) {
195  if (*GivenStd != LangStandard::lang_unspecified)
196  Std = *GivenStd;
197  continue;
198  }
199 
200  Cmd.CommandLine.insert(Cmd.CommandLine.end(),
201  OldArgs.data() + OldPos, OldArgs.data() + Pos);
202  }
203 
204  // Make use of -std iff -x was missing.
206  Type = toType(LangStandard::getLangStandardForKind(Std).getLanguage());
207  Type = foldType(*Type);
208  // The contract is to store None instead of TY_INVALID.
209  if (Type == types::TY_INVALID)
210  Type = llvm::None;
211  }
212 
213  // Produce a CompileCommand for \p filename, based on this one.
214  // (This consumes the TransferableCommand just to avoid copying Cmd).
215  CompileCommand transferTo(StringRef Filename) && {
216  CompileCommand Result = std::move(Cmd);
217  Result.Heuristic = "inferred from " + Result.Filename;
218  Result.Filename = std::string(Filename);
219  bool TypeCertain;
220  auto TargetType = guessType(Filename, &TypeCertain);
221  // If the filename doesn't determine the language (.h), transfer with -x.
222  if ((!TargetType || !TypeCertain) && Type) {
223  // Use *Type, or its header variant if the file is a header.
224  // Treat no/invalid extension as header (e.g. C++ standard library).
225  TargetType =
226  (!TargetType || types::onlyPrecompileType(TargetType)) // header?
228  : *Type;
229  if (ClangCLMode) {
230  const StringRef Flag = toCLFlag(TargetType);
231  if (!Flag.empty())
232  Result.CommandLine.push_back(std::string(Flag));
233  } else {
234  Result.CommandLine.push_back("-x");
235  Result.CommandLine.push_back(types::getTypeName(TargetType));
236  }
237  }
238  // --std flag may only be transferred if the language is the same.
239  // We may consider "translating" these, e.g. c++11 -> c11.
240  if (Std != LangStandard::lang_unspecified && foldType(TargetType) == Type) {
241  Result.CommandLine.emplace_back((
242  llvm::Twine(ClangCLMode ? "/std:" : "-std=") +
244  }
245  Result.CommandLine.push_back("--");
246  Result.CommandLine.push_back(std::string(Filename));
247  return Result;
248  }
249 
250 private:
251  // Map the language from the --std flag to that of the -x flag.
252  static types::ID toType(Language Lang) {
253  switch (Lang) {
254  case Language::C:
255  return types::TY_C;
256  case Language::CXX:
257  return types::TY_CXX;
258  case Language::ObjC:
259  return types::TY_ObjC;
260  case Language::ObjCXX:
261  return types::TY_ObjCXX;
262  default:
263  return types::TY_INVALID;
264  }
265  }
266 
267  // Convert a file type to the matching CL-style type flag.
268  static StringRef toCLFlag(types::ID Type) {
269  switch (Type) {
270  case types::TY_C:
271  case types::TY_CHeader:
272  return "/TC";
273  case types::TY_CXX:
274  case types::TY_CXXHeader:
275  return "/TP";
276  default:
277  return StringRef();
278  }
279  }
280 
281  // Try to interpret the argument as a type specifier, e.g. '-x'.
282  Optional<types::ID> tryParseTypeArg(const llvm::opt::Arg &Arg) {
283  const llvm::opt::Option &Opt = Arg.getOption();
284  using namespace driver::options;
285  if (ClangCLMode) {
286  if (Opt.matches(OPT__SLASH_TC) || Opt.matches(OPT__SLASH_Tc))
287  return types::TY_C;
288  if (Opt.matches(OPT__SLASH_TP) || Opt.matches(OPT__SLASH_Tp))
289  return types::TY_CXX;
290  } else {
291  if (Opt.matches(driver::options::OPT_x))
292  return types::lookupTypeForTypeSpecifier(Arg.getValue());
293  }
294  return None;
295  }
296 
297  // Try to interpret the argument as '-std='.
298  Optional<LangStandard::Kind> tryParseStdArg(const llvm::opt::Arg &Arg) {
299  using namespace driver::options;
300  if (Arg.getOption().matches(ClangCLMode ? OPT__SLASH_std : OPT_std_EQ))
301  return LangStandard::getLangKind(Arg.getValue());
302  return None;
303  }
304 };
305 
306 // Given a filename, FileIndex picks the best matching file from the underlying
307 // DB. This is the proxy file whose CompileCommand will be reused. The
308 // heuristics incorporate file name, extension, and directory structure.
309 // Strategy:
310 // - Build indexes of each of the substrings we want to look up by.
311 // These indexes are just sorted lists of the substrings.
312 // - Each criterion corresponds to a range lookup into the index, so we only
313 // need O(log N) string comparisons to determine scores.
314 //
315 // Apart from path proximity signals, also takes file extensions into account
316 // when scoring the candidates.
317 class FileIndex {
318 public:
319  FileIndex(std::vector<std::string> Files)
320  : OriginalPaths(std::move(Files)), Strings(Arena) {
321  // Sort commands by filename for determinism (index is a tiebreaker later).
322  llvm::sort(OriginalPaths);
323  Paths.reserve(OriginalPaths.size());
324  Types.reserve(OriginalPaths.size());
325  Stems.reserve(OriginalPaths.size());
326  for (size_t I = 0; I < OriginalPaths.size(); ++I) {
327  StringRef Path = Strings.save(StringRef(OriginalPaths[I]).lower());
328 
329  Paths.emplace_back(Path, I);
330  Types.push_back(foldType(guessType(OriginalPaths[I])));
331  Stems.emplace_back(sys::path::stem(Path), I);
332  auto Dir = ++sys::path::rbegin(Path), DirEnd = sys::path::rend(Path);
333  for (int J = 0; J < DirectorySegmentsIndexed && Dir != DirEnd; ++J, ++Dir)
334  if (Dir->size() > ShortDirectorySegment) // not trivial ones
335  Components.emplace_back(*Dir, I);
336  }
337  llvm::sort(Paths);
338  llvm::sort(Stems);
339  llvm::sort(Components);
340  }
341 
342  bool empty() const { return Paths.empty(); }
343 
344  // Returns the path for the file that best fits OriginalFilename.
345  // Candidates with extensions matching PreferLanguage will be chosen over
346  // others (unless it's TY_INVALID, or all candidates are bad).
347  StringRef chooseProxy(StringRef OriginalFilename,
348  types::ID PreferLanguage) const {
349  assert(!empty() && "need at least one candidate!");
350  std::string Filename = OriginalFilename.lower();
351  auto Candidates = scoreCandidates(Filename);
352  std::pair<size_t, int> Best =
353  pickWinner(Candidates, Filename, PreferLanguage);
354 
355  DEBUG_WITH_TYPE(
356  "interpolate",
357  llvm::dbgs() << "interpolate: chose " << OriginalPaths[Best.first]
358  << " as proxy for " << OriginalFilename << " preferring "
359  << (PreferLanguage == types::TY_INVALID
360  ? "none"
361  : types::getTypeName(PreferLanguage))
362  << " score=" << Best.second << "\n");
363  return OriginalPaths[Best.first];
364  }
365 
366 private:
367  using SubstringAndIndex = std::pair<StringRef, size_t>;
368  // Directory matching parameters: we look at the last two segments of the
369  // parent directory (usually the semantically significant ones in practice).
370  // We search only the last four of each candidate (for efficiency).
371  constexpr static int DirectorySegmentsIndexed = 4;
372  constexpr static int DirectorySegmentsQueried = 2;
373  constexpr static int ShortDirectorySegment = 1; // Only look at longer names.
374 
375  // Award points to candidate entries that should be considered for the file.
376  // Returned keys are indexes into paths, and the values are (nonzero) scores.
377  DenseMap<size_t, int> scoreCandidates(StringRef Filename) const {
378  // Decompose Filename into the parts we care about.
379  // /some/path/complicated/project/Interesting.h
380  // [-prefix--][---dir---] [-dir-] [--stem---]
381  StringRef Stem = sys::path::stem(Filename);
383  llvm::StringRef Prefix;
384  auto Dir = ++sys::path::rbegin(Filename),
385  DirEnd = sys::path::rend(Filename);
386  for (int I = 0; I < DirectorySegmentsQueried && Dir != DirEnd; ++I, ++Dir) {
387  if (Dir->size() > ShortDirectorySegment)
388  Dirs.push_back(*Dir);
389  Prefix = Filename.substr(0, Dir - DirEnd);
390  }
391 
392  // Now award points based on lookups into our various indexes.
393  DenseMap<size_t, int> Candidates; // Index -> score.
394  auto Award = [&](int Points, ArrayRef<SubstringAndIndex> Range) {
395  for (const auto &Entry : Range)
396  Candidates[Entry.second] += Points;
397  };
398  // Award one point if the file's basename is a prefix of the candidate,
399  // and another if it's an exact match (so exact matches get two points).
400  Award(1, indexLookup</*Prefix=*/true>(Stem, Stems));
401  Award(1, indexLookup</*Prefix=*/false>(Stem, Stems));
402  // For each of the last few directories in the Filename, award a point
403  // if it's present in the candidate.
404  for (StringRef Dir : Dirs)
405  Award(1, indexLookup</*Prefix=*/false>(Dir, Components));
406  // Award one more point if the whole rest of the path matches.
407  if (sys::path::root_directory(Prefix) != Prefix)
408  Award(1, indexLookup</*Prefix=*/true>(Prefix, Paths));
409  return Candidates;
410  }
411 
412  // Pick a single winner from the set of scored candidates.
413  // Returns (index, score).
414  std::pair<size_t, int> pickWinner(const DenseMap<size_t, int> &Candidates,
415  StringRef Filename,
416  types::ID PreferredLanguage) const {
417  struct ScoredCandidate {
418  size_t Index;
419  bool Preferred;
420  int Points;
421  size_t PrefixLength;
422  };
423  // Choose the best candidate by (preferred, points, prefix length, alpha).
424  ScoredCandidate Best = {size_t(-1), false, 0, 0};
425  for (const auto &Candidate : Candidates) {
426  ScoredCandidate S;
427  S.Index = Candidate.first;
428  S.Preferred = PreferredLanguage == types::TY_INVALID ||
429  PreferredLanguage == Types[S.Index];
430  S.Points = Candidate.second;
431  if (!S.Preferred && Best.Preferred)
432  continue;
433  if (S.Preferred == Best.Preferred) {
434  if (S.Points < Best.Points)
435  continue;
436  if (S.Points == Best.Points) {
437  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
438  if (S.PrefixLength < Best.PrefixLength)
439  continue;
440  // hidden heuristics should at least be deterministic!
441  if (S.PrefixLength == Best.PrefixLength)
442  if (S.Index > Best.Index)
443  continue;
444  }
445  }
446  // PrefixLength was only set above if actually needed for a tiebreak.
447  // But it definitely needs to be set to break ties in the future.
448  S.PrefixLength = matchingPrefix(Filename, Paths[S.Index].first);
449  Best = S;
450  }
451  // Edge case: no candidate got any points.
452  // We ignore PreferredLanguage at this point (not ideal).
453  if (Best.Index == size_t(-1))
454  return {longestMatch(Filename, Paths).second, 0};
455  return {Best.Index, Best.Points};
456  }
457 
458  // Returns the range within a sorted index that compares equal to Key.
459  // If Prefix is true, it's instead the range starting with Key.
460  template <bool Prefix>
462  indexLookup(StringRef Key, ArrayRef<SubstringAndIndex> Idx) const {
463  // Use pointers as iteratiors to ease conversion of result to ArrayRef.
464  auto Range = std::equal_range(Idx.data(), Idx.data() + Idx.size(), Key,
465  Less<Prefix>());
466  return {Range.first, Range.second};
467  }
468 
469  // Performs a point lookup into a nonempty index, returning a longest match.
470  SubstringAndIndex longestMatch(StringRef Key,
471  ArrayRef<SubstringAndIndex> Idx) const {
472  assert(!Idx.empty());
473  // Longest substring match will be adjacent to a direct lookup.
474  auto It = llvm::lower_bound(Idx, SubstringAndIndex{Key, 0});
475  if (It == Idx.begin())
476  return *It;
477  if (It == Idx.end())
478  return *--It;
479  // Have to choose between It and It-1
480  size_t Prefix = matchingPrefix(Key, It->first);
481  size_t PrevPrefix = matchingPrefix(Key, (It - 1)->first);
482  return Prefix > PrevPrefix ? *It : *--It;
483  }
484 
485  // Original paths, everything else is in lowercase.
486  std::vector<std::string> OriginalPaths;
487  BumpPtrAllocator Arena;
488  StringSaver Strings;
489  // Indexes of candidates by certain substrings.
490  // String is lowercase and sorted, index points into OriginalPaths.
491  std::vector<SubstringAndIndex> Paths; // Full path.
492  // Lang types obtained by guessing on the corresponding path. I-th element is
493  // a type for the I-th path.
494  std::vector<types::ID> Types;
495  std::vector<SubstringAndIndex> Stems; // Basename, without extension.
496  std::vector<SubstringAndIndex> Components; // Last path components.
497 };
498 
499 // The actual CompilationDatabase wrapper delegates to its inner database.
500 // If no match, looks up a proxy file in FileIndex and transfers its
501 // command to the requested file.
502 class InterpolatingCompilationDatabase : public CompilationDatabase {
503 public:
504  InterpolatingCompilationDatabase(std::unique_ptr<CompilationDatabase> Inner)
505  : Inner(std::move(Inner)), Index(this->Inner->getAllFiles()) {}
506 
507  std::vector<CompileCommand>
508  getCompileCommands(StringRef Filename) const override {
509  auto Known = Inner->getCompileCommands(Filename);
510  if (Index.empty() || !Known.empty())
511  return Known;
512  bool TypeCertain;
513  auto Lang = guessType(Filename, &TypeCertain);
514  if (!TypeCertain)
515  Lang = types::TY_INVALID;
516  auto ProxyCommands =
517  Inner->getCompileCommands(Index.chooseProxy(Filename, foldType(Lang)));
518  if (ProxyCommands.empty())
519  return {};
520  return {transferCompileCommand(std::move(ProxyCommands.front()), Filename)};
521  }
522 
523  std::vector<std::string> getAllFiles() const override {
524  return Inner->getAllFiles();
525  }
526 
527  std::vector<CompileCommand> getAllCompileCommands() const override {
528  return Inner->getAllCompileCommands();
529  }
530 
531 private:
532  std::unique_ptr<CompilationDatabase> Inner;
533  FileIndex Index;
534 };
535 
536 } // namespace
537 
538 std::unique_ptr<CompilationDatabase>
539 inferMissingCompileCommands(std::unique_ptr<CompilationDatabase> Inner) {
540  return std::make_unique<InterpolatingCompilationDatabase>(std::move(Inner));
541 }
542 
544  StringRef Filename) {
545  return TransferableCommand(std::move(Cmd)).transferTo(Filename);
546 }
547 
548 } // namespace tooling
549 } // namespace clang
llvm
YAML serialization mapping.
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Driver.h
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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.
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__SIZE_TYPE__ size_t
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constexpr XRayInstrMask None
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ID lookupTypeForTypeSpecifier(const char *Name)
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Std
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@ TY_INVALID
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Definition: ReturnValueChecker.cpp:61
Cmd
CompileCommand Cmd
Definition: InterpolatingCompilationDatabase.cpp:129
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:543
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:23
LangStandard.h
clang::driver::options::CLDXCOption
@ CLDXCOption
Definition: Options.h:39
clang::Language::CXX
@ CXX
clang::Language::ObjCXX
@ ObjCXX
llvm::ArrayRef
Definition: LLVM.h:34
Value
Value
Definition: UninitializedValues.cpp:103
clang::Language::ObjC
@ ObjC
clang::driver::types::ID
ID
Definition: Types.h:23
clang::LangStandard::lang_unspecified
@ lang_unspecified
Definition: LangStandard.h:73
std
Definition: Format.h:4477
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:6280
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:6265
clang::LangStandard::getLangStandardForKind
static const LangStandard & getLangStandardForKind(Kind K)
Definition: LangStandards.cpp:20
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:408
Type
MatchType Type
Definition: ASTMatchFinder.cpp:71