clang  3.7.0
Diagnostic.h
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1 //===--- Diagnostic.h - C Language Family Diagnostic Handling ---*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief Defines the Diagnostic-related interfaces.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CLANG_BASIC_DIAGNOSTIC_H
16 #define LLVM_CLANG_BASIC_DIAGNOSTIC_H
17 
21 #include "clang/Basic/Specifiers.h"
22 #include "llvm/ADT/ArrayRef.h"
23 #include "llvm/ADT/DenseMap.h"
24 #include "llvm/ADT/IntrusiveRefCntPtr.h"
25 #include "llvm/ADT/iterator_range.h"
26 #include <list>
27 #include <vector>
28 
29 namespace clang {
30  class DeclContext;
31  class DiagnosticBuilder;
32  class DiagnosticConsumer;
33  class DiagnosticErrorTrap;
34  class DiagnosticOptions;
35  class IdentifierInfo;
36  class LangOptions;
37  class Preprocessor;
38  class StoredDiagnostic;
39  namespace tok {
40  enum TokenKind : unsigned short;
41  }
42 
43 /// \brief Annotates a diagnostic with some code that should be
44 /// inserted, removed, or replaced to fix the problem.
45 ///
46 /// This kind of hint should be used when we are certain that the
47 /// introduction, removal, or modification of a particular (small!)
48 /// amount of code will correct a compilation error. The compiler
49 /// should also provide full recovery from such errors, such that
50 /// suppressing the diagnostic output can still result in successful
51 /// compilation.
52 class FixItHint {
53 public:
54  /// \brief Code that should be replaced to correct the error. Empty for an
55  /// insertion hint.
57 
58  /// \brief Code in the specific range that should be inserted in the insertion
59  /// location.
61 
62  /// \brief The actual code to insert at the insertion location, as a
63  /// string.
64  std::string CodeToInsert;
65 
67 
68  /// \brief Empty code modification hint, indicating that no code
69  /// modification is known.
71 
72  bool isNull() const {
73  return !RemoveRange.isValid();
74  }
75 
76  /// \brief Create a code modification hint that inserts the given
77  /// code string at a specific location.
79  StringRef Code,
80  bool BeforePreviousInsertions = false) {
81  FixItHint Hint;
82  Hint.RemoveRange =
83  CharSourceRange::getCharRange(InsertionLoc, InsertionLoc);
84  Hint.CodeToInsert = Code;
86  return Hint;
87  }
88 
89  /// \brief Create a code modification hint that inserts the given
90  /// code from \p FromRange at a specific location.
92  CharSourceRange FromRange,
93  bool BeforePreviousInsertions = false) {
94  FixItHint Hint;
95  Hint.RemoveRange =
96  CharSourceRange::getCharRange(InsertionLoc, InsertionLoc);
97  Hint.InsertFromRange = FromRange;
99  return Hint;
100  }
101 
102  /// \brief Create a code modification hint that removes the given
103  /// source range.
105  FixItHint Hint;
106  Hint.RemoveRange = RemoveRange;
107  return Hint;
108  }
110  return CreateRemoval(CharSourceRange::getTokenRange(RemoveRange));
111  }
112 
113  /// \brief Create a code modification hint that replaces the given
114  /// source range with the given code string.
116  StringRef Code) {
117  FixItHint Hint;
118  Hint.RemoveRange = RemoveRange;
119  Hint.CodeToInsert = Code;
120  return Hint;
121  }
122 
124  StringRef Code) {
125  return CreateReplacement(CharSourceRange::getTokenRange(RemoveRange), Code);
126  }
127 };
128 
129 /// \brief Concrete class used by the front-end to report problems and issues.
130 ///
131 /// This massages the diagnostics (e.g. handling things like "report warnings
132 /// as errors" and passes them off to the DiagnosticConsumer for reporting to
133 /// the user. DiagnosticsEngine is tied to one translation unit and one
134 /// SourceManager.
135 class DiagnosticsEngine : public RefCountedBase<DiagnosticsEngine> {
136  DiagnosticsEngine(const DiagnosticsEngine &) = delete;
137  void operator=(const DiagnosticsEngine &) = delete;
138 
139 public:
140  /// \brief The level of the diagnostic, after it has been through mapping.
141  enum Level {
148  };
149 
151  ak_std_string, ///< std::string
152  ak_c_string, ///< const char *
153  ak_sint, ///< int
154  ak_uint, ///< unsigned
155  ak_tokenkind, ///< enum TokenKind : unsigned
156  ak_identifierinfo, ///< IdentifierInfo
157  ak_qualtype, ///< QualType
158  ak_declarationname, ///< DeclarationName
159  ak_nameddecl, ///< NamedDecl *
160  ak_nestednamespec, ///< NestedNameSpecifier *
161  ak_declcontext, ///< DeclContext *
162  ak_qualtype_pair, ///< pair<QualType, QualType>
163  ak_attr ///< Attr *
164  };
165 
166  /// \brief Represents on argument value, which is a union discriminated
167  /// by ArgumentKind, with a value.
168  typedef std::pair<ArgumentKind, intptr_t> ArgumentValue;
169 
170 private:
171  unsigned char AllExtensionsSilenced; // Used by __extension__
172  bool IgnoreAllWarnings; // Ignore all warnings: -w
173  bool WarningsAsErrors; // Treat warnings like errors.
174  bool EnableAllWarnings; // Enable all warnings.
175  bool ErrorsAsFatal; // Treat errors like fatal errors.
176  bool SuppressSystemWarnings; // Suppress warnings in system headers.
177  bool SuppressAllDiagnostics; // Suppress all diagnostics.
178  bool ElideType; // Elide common types of templates.
179  bool PrintTemplateTree; // Print a tree when comparing templates.
180  bool ShowColors; // Color printing is enabled.
181  OverloadsShown ShowOverloads; // Which overload candidates to show.
182  unsigned ErrorLimit; // Cap of # errors emitted, 0 -> no limit.
183  unsigned TemplateBacktraceLimit; // Cap on depth of template backtrace stack,
184  // 0 -> no limit.
185  unsigned ConstexprBacktraceLimit; // Cap on depth of constexpr evaluation
186  // backtrace stack, 0 -> no limit.
187  diag::Severity ExtBehavior; // Map extensions to warnings or errors?
190  DiagnosticConsumer *Client;
191  std::unique_ptr<DiagnosticConsumer> Owner;
192  SourceManager *SourceMgr;
193 
194  /// \brief Mapping information for diagnostics.
195  ///
196  /// Mapping info is packed into four bits per diagnostic. The low three
197  /// bits are the mapping (an instance of diag::Severity), or zero if unset.
198  /// The high bit is set when the mapping was established as a user mapping.
199  /// If the high bit is clear, then the low bits are set to the default
200  /// value, and should be mapped with -pedantic, -Werror, etc.
201  ///
202  /// A new DiagState is created and kept around when diagnostic pragmas modify
203  /// the state so that we know what is the diagnostic state at any given
204  /// source location.
205  class DiagState {
206  llvm::DenseMap<unsigned, DiagnosticMapping> DiagMap;
207 
208  public:
209  typedef llvm::DenseMap<unsigned, DiagnosticMapping>::iterator iterator;
210  typedef llvm::DenseMap<unsigned, DiagnosticMapping>::const_iterator
211  const_iterator;
212 
213  void setMapping(diag::kind Diag, DiagnosticMapping Info) {
214  DiagMap[Diag] = Info;
215  }
216 
217  DiagnosticMapping &getOrAddMapping(diag::kind Diag);
218 
219  const_iterator begin() const { return DiagMap.begin(); }
220  const_iterator end() const { return DiagMap.end(); }
221  };
222 
223  /// \brief Keeps and automatically disposes all DiagStates that we create.
224  std::list<DiagState> DiagStates;
225 
226  /// \brief Represents a point in source where the diagnostic state was
227  /// modified because of a pragma.
228  ///
229  /// 'Loc' can be null if the point represents the diagnostic state
230  /// modifications done through the command-line.
231  struct DiagStatePoint {
232  DiagState *State;
233  FullSourceLoc Loc;
234  DiagStatePoint(DiagState *State, FullSourceLoc Loc)
235  : State(State), Loc(Loc) { }
236 
237  bool operator<(const DiagStatePoint &RHS) const {
238  // If Loc is invalid it means it came from <command-line>, in which case
239  // we regard it as coming before any valid source location.
240  if (RHS.Loc.isInvalid())
241  return false;
242  if (Loc.isInvalid())
243  return true;
244  return Loc.isBeforeInTranslationUnitThan(RHS.Loc);
245  }
246  };
247 
248  /// \brief A sorted vector of all DiagStatePoints representing changes in
249  /// diagnostic state due to diagnostic pragmas.
250  ///
251  /// The vector is always sorted according to the SourceLocation of the
252  /// DiagStatePoint.
253  typedef std::vector<DiagStatePoint> DiagStatePointsTy;
254  mutable DiagStatePointsTy DiagStatePoints;
255 
256  /// \brief Keeps the DiagState that was active during each diagnostic 'push'
257  /// so we can get back at it when we 'pop'.
258  std::vector<DiagState *> DiagStateOnPushStack;
259 
260  DiagState *GetCurDiagState() const {
261  assert(!DiagStatePoints.empty());
262  return DiagStatePoints.back().State;
263  }
264 
265  void PushDiagStatePoint(DiagState *State, SourceLocation L) {
266  FullSourceLoc Loc(L, getSourceManager());
267  // Make sure that DiagStatePoints is always sorted according to Loc.
268  assert(Loc.isValid() && "Adding invalid loc point");
269  assert(!DiagStatePoints.empty() &&
270  (DiagStatePoints.back().Loc.isInvalid() ||
271  DiagStatePoints.back().Loc.isBeforeInTranslationUnitThan(Loc)) &&
272  "Previous point loc comes after or is the same as new one");
273  DiagStatePoints.push_back(DiagStatePoint(State, Loc));
274  }
275 
276  /// \brief Finds the DiagStatePoint that contains the diagnostic state of
277  /// the given source location.
278  DiagStatePointsTy::iterator GetDiagStatePointForLoc(SourceLocation Loc) const;
279 
280  /// \brief Sticky flag set to \c true when an error is emitted.
281  bool ErrorOccurred;
282 
283  /// \brief Sticky flag set to \c true when an "uncompilable error" occurs.
284  /// I.e. an error that was not upgraded from a warning by -Werror.
285  bool UncompilableErrorOccurred;
286 
287  /// \brief Sticky flag set to \c true when a fatal error is emitted.
288  bool FatalErrorOccurred;
289 
290  /// \brief Indicates that an unrecoverable error has occurred.
291  bool UnrecoverableErrorOccurred;
292 
293  /// \brief Counts for DiagnosticErrorTrap to check whether an error occurred
294  /// during a parsing section, e.g. during parsing a function.
295  unsigned TrapNumErrorsOccurred;
296  unsigned TrapNumUnrecoverableErrorsOccurred;
297 
298  /// \brief The level of the last diagnostic emitted.
299  ///
300  /// This is used to emit continuation diagnostics with the same level as the
301  /// diagnostic that they follow.
302  DiagnosticIDs::Level LastDiagLevel;
303 
304  unsigned NumWarnings; ///< Number of warnings reported
305  unsigned NumErrors; ///< Number of errors reported
306 
307  /// \brief A function pointer that converts an opaque diagnostic
308  /// argument to a strings.
309  ///
310  /// This takes the modifiers and argument that was present in the diagnostic.
311  ///
312  /// The PrevArgs array indicates the previous arguments formatted for this
313  /// diagnostic. Implementations of this function can use this information to
314  /// avoid redundancy across arguments.
315  ///
316  /// This is a hack to avoid a layering violation between libbasic and libsema.
317  typedef void (*ArgToStringFnTy)(
318  ArgumentKind Kind, intptr_t Val,
319  StringRef Modifier, StringRef Argument,
320  ArrayRef<ArgumentValue> PrevArgs,
321  SmallVectorImpl<char> &Output,
322  void *Cookie,
323  ArrayRef<intptr_t> QualTypeVals);
324  void *ArgToStringCookie;
325  ArgToStringFnTy ArgToStringFn;
326 
327  /// \brief ID of the "delayed" diagnostic, which is a (typically
328  /// fatal) diagnostic that had to be delayed because it was found
329  /// while emitting another diagnostic.
330  unsigned DelayedDiagID;
331 
332  /// \brief First string argument for the delayed diagnostic.
333  std::string DelayedDiagArg1;
334 
335  /// \brief Second string argument for the delayed diagnostic.
336  std::string DelayedDiagArg2;
337 
338  /// \brief Optional flag value.
339  ///
340  /// Some flags accept values, for instance: -Wframe-larger-than=<value> and
341  /// -Rpass=<value>. The content of this string is emitted after the flag name
342  /// and '='.
343  std::string FlagValue;
344 
345 public:
346  explicit DiagnosticsEngine(
347  const IntrusiveRefCntPtr<DiagnosticIDs> &Diags,
348  DiagnosticOptions *DiagOpts,
349  DiagnosticConsumer *client = nullptr,
350  bool ShouldOwnClient = true);
352 
354  return Diags;
355  }
356 
357  /// \brief Retrieve the diagnostic options.
358  DiagnosticOptions &getDiagnosticOptions() const { return *DiagOpts; }
359 
360  typedef llvm::iterator_range<DiagState::const_iterator> diag_mapping_range;
361 
362  /// \brief Get the current set of diagnostic mappings.
364  const DiagState &DS = *GetCurDiagState();
365  return diag_mapping_range(DS.begin(), DS.end());
366  }
367 
368  DiagnosticConsumer *getClient() { return Client; }
369  const DiagnosticConsumer *getClient() const { return Client; }
370 
371  /// \brief Determine whether this \c DiagnosticsEngine object own its client.
372  bool ownsClient() const { return Owner != nullptr; }
373 
374  /// \brief Return the current diagnostic client along with ownership of that
375  /// client.
376  std::unique_ptr<DiagnosticConsumer> takeClient() { return std::move(Owner); }
377 
378  bool hasSourceManager() const { return SourceMgr != nullptr; }
380  assert(SourceMgr && "SourceManager not set!");
381  return *SourceMgr;
382  }
383  void setSourceManager(SourceManager *SrcMgr) { SourceMgr = SrcMgr; }
384 
385  //===--------------------------------------------------------------------===//
386  // DiagnosticsEngine characterization methods, used by a client to customize
387  // how diagnostics are emitted.
388  //
389 
390  /// \brief Copies the current DiagMappings and pushes the new copy
391  /// onto the top of the stack.
392  void pushMappings(SourceLocation Loc);
393 
394  /// \brief Pops the current DiagMappings off the top of the stack,
395  /// causing the new top of the stack to be the active mappings.
396  ///
397  /// \returns \c true if the pop happens, \c false if there is only one
398  /// DiagMapping on the stack.
399  bool popMappings(SourceLocation Loc);
400 
401  /// \brief Set the diagnostic client associated with this diagnostic object.
402  ///
403  /// \param ShouldOwnClient true if the diagnostic object should take
404  /// ownership of \c client.
405  void setClient(DiagnosticConsumer *client, bool ShouldOwnClient = true);
406 
407  /// \brief Specify a limit for the number of errors we should
408  /// emit before giving up.
409  ///
410  /// Zero disables the limit.
411  void setErrorLimit(unsigned Limit) { ErrorLimit = Limit; }
412 
413  /// \brief Specify the maximum number of template instantiation
414  /// notes to emit along with a given diagnostic.
415  void setTemplateBacktraceLimit(unsigned Limit) {
416  TemplateBacktraceLimit = Limit;
417  }
418 
419  /// \brief Retrieve the maximum number of template instantiation
420  /// notes to emit along with a given diagnostic.
421  unsigned getTemplateBacktraceLimit() const {
422  return TemplateBacktraceLimit;
423  }
424 
425  /// \brief Specify the maximum number of constexpr evaluation
426  /// notes to emit along with a given diagnostic.
427  void setConstexprBacktraceLimit(unsigned Limit) {
428  ConstexprBacktraceLimit = Limit;
429  }
430 
431  /// \brief Retrieve the maximum number of constexpr evaluation
432  /// notes to emit along with a given diagnostic.
433  unsigned getConstexprBacktraceLimit() const {
434  return ConstexprBacktraceLimit;
435  }
436 
437  /// \brief When set to true, any unmapped warnings are ignored.
438  ///
439  /// If this and WarningsAsErrors are both set, then this one wins.
440  void setIgnoreAllWarnings(bool Val) { IgnoreAllWarnings = Val; }
441  bool getIgnoreAllWarnings() const { return IgnoreAllWarnings; }
442 
443  /// \brief When set to true, any unmapped ignored warnings are no longer
444  /// ignored.
445  ///
446  /// If this and IgnoreAllWarnings are both set, then that one wins.
447  void setEnableAllWarnings(bool Val) { EnableAllWarnings = Val; }
448  bool getEnableAllWarnings() const { return EnableAllWarnings; }
449 
450  /// \brief When set to true, any warnings reported are issued as errors.
451  void setWarningsAsErrors(bool Val) { WarningsAsErrors = Val; }
452  bool getWarningsAsErrors() const { return WarningsAsErrors; }
453 
454  /// \brief When set to true, any error reported is made a fatal error.
455  void setErrorsAsFatal(bool Val) { ErrorsAsFatal = Val; }
456  bool getErrorsAsFatal() const { return ErrorsAsFatal; }
457 
458  /// \brief When set to true mask warnings that come from system headers.
459  void setSuppressSystemWarnings(bool Val) { SuppressSystemWarnings = Val; }
460  bool getSuppressSystemWarnings() const { return SuppressSystemWarnings; }
461 
462  /// \brief Suppress all diagnostics, to silence the front end when we
463  /// know that we don't want any more diagnostics to be passed along to the
464  /// client
465  void setSuppressAllDiagnostics(bool Val = true) {
466  SuppressAllDiagnostics = Val;
467  }
468  bool getSuppressAllDiagnostics() const { return SuppressAllDiagnostics; }
469 
470  /// \brief Set type eliding, to skip outputting same types occurring in
471  /// template types.
472  void setElideType(bool Val = true) { ElideType = Val; }
473  bool getElideType() { return ElideType; }
474 
475  /// \brief Set tree printing, to outputting the template difference in a
476  /// tree format.
477  void setPrintTemplateTree(bool Val = false) { PrintTemplateTree = Val; }
478  bool getPrintTemplateTree() { return PrintTemplateTree; }
479 
480  /// \brief Set color printing, so the type diffing will inject color markers
481  /// into the output.
482  void setShowColors(bool Val = false) { ShowColors = Val; }
483  bool getShowColors() { return ShowColors; }
484 
485  /// \brief Specify which overload candidates to show when overload resolution
486  /// fails.
487  ///
488  /// By default, we show all candidates.
490  ShowOverloads = Val;
491  }
492  OverloadsShown getShowOverloads() const { return ShowOverloads; }
493 
494  /// \brief Pretend that the last diagnostic issued was ignored, so any
495  /// subsequent notes will be suppressed.
496  ///
497  /// This can be used by clients who suppress diagnostics themselves.
499  if (LastDiagLevel == DiagnosticIDs::Fatal)
500  FatalErrorOccurred = true;
501  LastDiagLevel = DiagnosticIDs::Ignored;
502  }
503 
504  /// \brief Determine whether the previous diagnostic was ignored. This can
505  /// be used by clients that want to determine whether notes attached to a
506  /// diagnostic will be suppressed.
507  bool isLastDiagnosticIgnored() const {
508  return LastDiagLevel == DiagnosticIDs::Ignored;
509  }
510 
511  /// \brief Controls whether otherwise-unmapped extension diagnostics are
512  /// mapped onto ignore/warning/error.
513  ///
514  /// This corresponds to the GCC -pedantic and -pedantic-errors option.
515  void setExtensionHandlingBehavior(diag::Severity H) { ExtBehavior = H; }
516  diag::Severity getExtensionHandlingBehavior() const { return ExtBehavior; }
517 
518  /// \brief Counter bumped when an __extension__ block is/ encountered.
519  ///
520  /// When non-zero, all extension diagnostics are entirely silenced, no
521  /// matter how they are mapped.
522  void IncrementAllExtensionsSilenced() { ++AllExtensionsSilenced; }
523  void DecrementAllExtensionsSilenced() { --AllExtensionsSilenced; }
524  bool hasAllExtensionsSilenced() { return AllExtensionsSilenced != 0; }
525 
526  /// \brief This allows the client to specify that certain warnings are
527  /// ignored.
528  ///
529  /// Notes can never be mapped, errors can only be mapped to fatal, and
530  /// WARNINGs and EXTENSIONs can be mapped arbitrarily.
531  ///
532  /// \param Loc The source location that this change of diagnostic state should
533  /// take affect. It can be null if we are setting the latest state.
535 
536  /// \brief Change an entire diagnostic group (e.g. "unknown-pragmas") to
537  /// have the specified mapping.
538  ///
539  /// \returns true (and ignores the request) if "Group" was unknown, false
540  /// otherwise.
541  ///
542  /// \param Flavor The flavor of group to affect. -Rfoo does not affect the
543  /// state of the -Wfoo group and vice versa.
544  ///
545  /// \param Loc The source location that this change of diagnostic state should
546  /// take affect. It can be null if we are setting the state from command-line.
547  bool setSeverityForGroup(diag::Flavor Flavor, StringRef Group,
550 
551  /// \brief Set the warning-as-error flag for the given diagnostic group.
552  ///
553  /// This function always only operates on the current diagnostic state.
554  ///
555  /// \returns True if the given group is unknown, false otherwise.
556  bool setDiagnosticGroupWarningAsError(StringRef Group, bool Enabled);
557 
558  /// \brief Set the error-as-fatal flag for the given diagnostic group.
559  ///
560  /// This function always only operates on the current diagnostic state.
561  ///
562  /// \returns True if the given group is unknown, false otherwise.
563  bool setDiagnosticGroupErrorAsFatal(StringRef Group, bool Enabled);
564 
565  /// \brief Add the specified mapping to all diagnostics of the specified
566  /// flavor.
567  ///
568  /// Mainly to be used by -Wno-everything to disable all warnings but allow
569  /// subsequent -W options to enable specific warnings.
572 
573  bool hasErrorOccurred() const { return ErrorOccurred; }
574 
575  /// \brief Errors that actually prevent compilation, not those that are
576  /// upgraded from a warning by -Werror.
578  return UncompilableErrorOccurred;
579  }
580  bool hasFatalErrorOccurred() const { return FatalErrorOccurred; }
581 
582  /// \brief Determine whether any kind of unrecoverable error has occurred.
584  return FatalErrorOccurred || UnrecoverableErrorOccurred;
585  }
586 
587  unsigned getNumWarnings() const { return NumWarnings; }
588 
589  void setNumWarnings(unsigned NumWarnings) {
590  this->NumWarnings = NumWarnings;
591  }
592 
593  /// \brief Return an ID for a diagnostic with the specified format string and
594  /// level.
595  ///
596  /// If this is the first request for this diagnostic, it is registered and
597  /// created, otherwise the existing ID is returned.
598  ///
599  /// \param FormatString A fixed diagnostic format string that will be hashed
600  /// and mapped to a unique DiagID.
601  template <unsigned N>
602  unsigned getCustomDiagID(Level L, const char (&FormatString)[N]) {
603  return Diags->getCustomDiagID((DiagnosticIDs::Level)L,
604  StringRef(FormatString, N - 1));
605  }
606 
607  /// \brief Converts a diagnostic argument (as an intptr_t) into the string
608  /// that represents it.
610  StringRef Modifier, StringRef Argument,
611  ArrayRef<ArgumentValue> PrevArgs,
612  SmallVectorImpl<char> &Output,
613  ArrayRef<intptr_t> QualTypeVals) const {
614  ArgToStringFn(Kind, Val, Modifier, Argument, PrevArgs, Output,
615  ArgToStringCookie, QualTypeVals);
616  }
617 
618  void SetArgToStringFn(ArgToStringFnTy Fn, void *Cookie) {
619  ArgToStringFn = Fn;
620  ArgToStringCookie = Cookie;
621  }
622 
623  /// \brief Note that the prior diagnostic was emitted by some other
624  /// \c DiagnosticsEngine, and we may be attaching a note to that diagnostic.
626  LastDiagLevel = Other.LastDiagLevel;
627  }
628 
629  /// \brief Reset the state of the diagnostic object to its initial
630  /// configuration.
631  void Reset();
632 
633  //===--------------------------------------------------------------------===//
634  // DiagnosticsEngine classification and reporting interfaces.
635  //
636 
637  /// \brief Determine whether the diagnostic is known to be ignored.
638  ///
639  /// This can be used to opportunistically avoid expensive checks when it's
640  /// known for certain that the diagnostic has been suppressed at the
641  /// specified location \p Loc.
642  ///
643  /// \param Loc The source location we are interested in finding out the
644  /// diagnostic state. Can be null in order to query the latest state.
645  bool isIgnored(unsigned DiagID, SourceLocation Loc) const {
646  return Diags->getDiagnosticSeverity(DiagID, Loc, *this) ==
648  }
649 
650  /// \brief Based on the way the client configured the DiagnosticsEngine
651  /// object, classify the specified diagnostic ID into a Level, consumable by
652  /// the DiagnosticConsumer.
653  ///
654  /// To preserve invariant assumptions, this function should not be used to
655  /// influence parse or semantic analysis actions. Instead consider using
656  /// \c isIgnored().
657  ///
658  /// \param Loc The source location we are interested in finding out the
659  /// diagnostic state. Can be null in order to query the latest state.
660  Level getDiagnosticLevel(unsigned DiagID, SourceLocation Loc) const {
661  return (Level)Diags->getDiagnosticLevel(DiagID, Loc, *this);
662  }
663 
664  /// \brief Issue the message to the client.
665  ///
666  /// This actually returns an instance of DiagnosticBuilder which emits the
667  /// diagnostics (through @c ProcessDiag) when it is destroyed.
668  ///
669  /// \param DiagID A member of the @c diag::kind enum.
670  /// \param Loc Represents the source location associated with the diagnostic,
671  /// which can be an invalid location if no position information is available.
672  inline DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID);
673  inline DiagnosticBuilder Report(unsigned DiagID);
674 
675  void Report(const StoredDiagnostic &storedDiag);
676 
677  /// \brief Determine whethere there is already a diagnostic in flight.
678  bool isDiagnosticInFlight() const { return CurDiagID != ~0U; }
679 
680  /// \brief Set the "delayed" diagnostic that will be emitted once
681  /// the current diagnostic completes.
682  ///
683  /// If a diagnostic is already in-flight but the front end must
684  /// report a problem (e.g., with an inconsistent file system
685  /// state), this routine sets a "delayed" diagnostic that will be
686  /// emitted after the current diagnostic completes. This should
687  /// only be used for fatal errors detected at inconvenient
688  /// times. If emitting a delayed diagnostic causes a second delayed
689  /// diagnostic to be introduced, that second delayed diagnostic
690  /// will be ignored.
691  ///
692  /// \param DiagID The ID of the diagnostic being delayed.
693  ///
694  /// \param Arg1 A string argument that will be provided to the
695  /// diagnostic. A copy of this string will be stored in the
696  /// DiagnosticsEngine object itself.
697  ///
698  /// \param Arg2 A string argument that will be provided to the
699  /// diagnostic. A copy of this string will be stored in the
700  /// DiagnosticsEngine object itself.
701  void SetDelayedDiagnostic(unsigned DiagID, StringRef Arg1 = "",
702  StringRef Arg2 = "");
703 
704  /// \brief Clear out the current diagnostic.
705  void Clear() { CurDiagID = ~0U; }
706 
707  /// \brief Return the value associated with this diagnostic flag.
708  StringRef getFlagValue() const { return FlagValue; }
709 
710 private:
711  /// \brief Report the delayed diagnostic.
712  void ReportDelayed();
713 
714  // This is private state used by DiagnosticBuilder. We put it here instead of
715  // in DiagnosticBuilder in order to keep DiagnosticBuilder a small lightweight
716  // object. This implementation choice means that we can only have one
717  // diagnostic "in flight" at a time, but this seems to be a reasonable
718  // tradeoff to keep these objects small. Assertions verify that only one
719  // diagnostic is in flight at a time.
720  friend class DiagnosticIDs;
721  friend class DiagnosticBuilder;
722  friend class Diagnostic;
723  friend class PartialDiagnostic;
724  friend class DiagnosticErrorTrap;
725 
726  /// \brief The location of the current diagnostic that is in flight.
727  SourceLocation CurDiagLoc;
728 
729  /// \brief The ID of the current diagnostic that is in flight.
730  ///
731  /// This is set to ~0U when there is no diagnostic in flight.
732  unsigned CurDiagID;
733 
734  enum {
735  /// \brief The maximum number of arguments we can hold.
736  ///
737  /// We currently only support up to 10 arguments (%0-%9). A single
738  /// diagnostic with more than that almost certainly has to be simplified
739  /// anyway.
740  MaxArguments = 10,
741  };
742 
743  /// \brief The number of entries in Arguments.
744  signed char NumDiagArgs;
745 
746  /// \brief Specifies whether an argument is in DiagArgumentsStr or
747  /// in DiagArguments.
748  ///
749  /// This is an array of ArgumentKind::ArgumentKind enum values, one for each
750  /// argument.
751  unsigned char DiagArgumentsKind[MaxArguments];
752 
753  /// \brief Holds the values of each string argument for the current
754  /// diagnostic.
755  ///
756  /// This is only used when the corresponding ArgumentKind is ak_std_string.
757  std::string DiagArgumentsStr[MaxArguments];
758 
759  /// \brief The values for the various substitution positions.
760  ///
761  /// This is used when the argument is not an std::string. The specific
762  /// value is mangled into an intptr_t and the interpretation depends on
763  /// exactly what sort of argument kind it is.
764  intptr_t DiagArgumentsVal[MaxArguments];
765 
766  /// \brief The list of ranges added to this diagnostic.
768 
769  /// \brief If valid, provides a hint with some code to insert, remove,
770  /// or modify at a particular position.
771  SmallVector<FixItHint, 8> DiagFixItHints;
772 
773  DiagnosticMapping makeUserMapping(diag::Severity Map, SourceLocation L) {
774  bool isPragma = L.isValid();
775  DiagnosticMapping Mapping =
776  DiagnosticMapping::Make(Map, /*IsUser=*/true, isPragma);
777 
778  // If this is a pragma mapping, then set the diagnostic mapping flags so
779  // that we override command line options.
780  if (isPragma) {
781  Mapping.setNoWarningAsError(true);
782  Mapping.setNoErrorAsFatal(true);
783  }
784 
785  return Mapping;
786  }
787 
788  /// \brief Used to report a diagnostic that is finally fully formed.
789  ///
790  /// \returns true if the diagnostic was emitted, false if it was suppressed.
791  bool ProcessDiag() {
792  return Diags->ProcessDiag(*this);
793  }
794 
795  /// @name Diagnostic Emission
796  /// @{
797 protected:
798  // Sema requires access to the following functions because the current design
799  // of SFINAE requires it to use its own SemaDiagnosticBuilder, which needs to
800  // access us directly to ensure we minimize the emitted code for the common
801  // Sema::Diag() patterns.
802  friend class Sema;
803 
804  /// \brief Emit the current diagnostic and clear the diagnostic state.
805  ///
806  /// \param Force Emit the diagnostic regardless of suppression settings.
807  bool EmitCurrentDiagnostic(bool Force = false);
808 
809  unsigned getCurrentDiagID() const { return CurDiagID; }
810 
811  SourceLocation getCurrentDiagLoc() const { return CurDiagLoc; }
812 
813  /// @}
814 
815  friend class ASTReader;
816  friend class ASTWriter;
817 };
818 
819 /// \brief RAII class that determines when any errors have occurred
820 /// between the time the instance was created and the time it was
821 /// queried.
823  DiagnosticsEngine &Diag;
824  unsigned NumErrors;
825  unsigned NumUnrecoverableErrors;
826 
827 public:
829  : Diag(Diag) { reset(); }
830 
831  /// \brief Determine whether any errors have occurred since this
832  /// object instance was created.
833  bool hasErrorOccurred() const {
834  return Diag.TrapNumErrorsOccurred > NumErrors;
835  }
836 
837  /// \brief Determine whether any unrecoverable errors have occurred since this
838  /// object instance was created.
840  return Diag.TrapNumUnrecoverableErrorsOccurred > NumUnrecoverableErrors;
841  }
842 
843  /// \brief Set to initial state of "no errors occurred".
844  void reset() {
845  NumErrors = Diag.TrapNumErrorsOccurred;
846  NumUnrecoverableErrors = Diag.TrapNumUnrecoverableErrorsOccurred;
847  }
848 };
849 
850 //===----------------------------------------------------------------------===//
851 // DiagnosticBuilder
852 //===----------------------------------------------------------------------===//
853 
854 /// \brief A little helper class used to produce diagnostics.
855 ///
856 /// This is constructed by the DiagnosticsEngine::Report method, and
857 /// allows insertion of extra information (arguments and source ranges) into
858 /// the currently "in flight" diagnostic. When the temporary for the builder
859 /// is destroyed, the diagnostic is issued.
860 ///
861 /// Note that many of these will be created as temporary objects (many call
862 /// sites), so we want them to be small and we never want their address taken.
863 /// This ensures that compilers with somewhat reasonable optimizers will promote
864 /// the common fields to registers, eliminating increments of the NumArgs field,
865 /// for example.
867  mutable DiagnosticsEngine *DiagObj;
868  mutable unsigned NumArgs;
869 
870  /// \brief Status variable indicating if this diagnostic is still active.
871  ///
872  // NOTE: This field is redundant with DiagObj (IsActive iff (DiagObj == 0)),
873  // but LLVM is not currently smart enough to eliminate the null check that
874  // Emit() would end up with if we used that as our status variable.
875  mutable bool IsActive;
876 
877  /// \brief Flag indicating that this diagnostic is being emitted via a
878  /// call to ForceEmit.
879  mutable bool IsForceEmit;
880 
881  void operator=(const DiagnosticBuilder &) = delete;
882  friend class DiagnosticsEngine;
883 
885  : DiagObj(nullptr), NumArgs(0), IsActive(false), IsForceEmit(false) {}
886 
887  explicit DiagnosticBuilder(DiagnosticsEngine *diagObj)
888  : DiagObj(diagObj), NumArgs(0), IsActive(true), IsForceEmit(false) {
889  assert(diagObj && "DiagnosticBuilder requires a valid DiagnosticsEngine!");
890  diagObj->DiagRanges.clear();
891  diagObj->DiagFixItHints.clear();
892  }
893 
894  friend class PartialDiagnostic;
895 
896 protected:
897  void FlushCounts() {
898  DiagObj->NumDiagArgs = NumArgs;
899  }
900 
901  /// \brief Clear out the current diagnostic.
902  void Clear() const {
903  DiagObj = nullptr;
904  IsActive = false;
905  IsForceEmit = false;
906  }
907 
908  /// \brief Determine whether this diagnostic is still active.
909  bool isActive() const { return IsActive; }
910 
911  /// \brief Force the diagnostic builder to emit the diagnostic now.
912  ///
913  /// Once this function has been called, the DiagnosticBuilder object
914  /// should not be used again before it is destroyed.
915  ///
916  /// \returns true if a diagnostic was emitted, false if the
917  /// diagnostic was suppressed.
918  bool Emit() {
919  // If this diagnostic is inactive, then its soul was stolen by the copy ctor
920  // (or by a subclass, as in SemaDiagnosticBuilder).
921  if (!isActive()) return false;
922 
923  // When emitting diagnostics, we set the final argument count into
924  // the DiagnosticsEngine object.
925  FlushCounts();
926 
927  // Process the diagnostic.
928  bool Result = DiagObj->EmitCurrentDiagnostic(IsForceEmit);
929 
930  // This diagnostic is dead.
931  Clear();
932 
933  return Result;
934  }
935 
936 public:
937  /// Copy constructor. When copied, this "takes" the diagnostic info from the
938  /// input and neuters it.
940  DiagObj = D.DiagObj;
941  IsActive = D.IsActive;
942  IsForceEmit = D.IsForceEmit;
943  D.Clear();
944  NumArgs = D.NumArgs;
945  }
946 
947  /// \brief Retrieve an empty diagnostic builder.
949  return DiagnosticBuilder();
950  }
951 
952  /// \brief Emits the diagnostic.
954  Emit();
955  }
956 
957  /// \brief Forces the diagnostic to be emitted.
959  IsForceEmit = true;
960  return *this;
961  }
962 
963  /// \brief Conversion of DiagnosticBuilder to bool always returns \c true.
964  ///
965  /// This allows is to be used in boolean error contexts (where \c true is
966  /// used to indicate that an error has occurred), like:
967  /// \code
968  /// return Diag(...);
969  /// \endcode
970  operator bool() const { return true; }
971 
972  void AddString(StringRef S) const {
973  assert(isActive() && "Clients must not add to cleared diagnostic!");
974  assert(NumArgs < DiagnosticsEngine::MaxArguments &&
975  "Too many arguments to diagnostic!");
976  DiagObj->DiagArgumentsKind[NumArgs] = DiagnosticsEngine::ak_std_string;
977  DiagObj->DiagArgumentsStr[NumArgs++] = S;
978  }
979 
981  assert(isActive() && "Clients must not add to cleared diagnostic!");
982  assert(NumArgs < DiagnosticsEngine::MaxArguments &&
983  "Too many arguments to diagnostic!");
984  DiagObj->DiagArgumentsKind[NumArgs] = Kind;
985  DiagObj->DiagArgumentsVal[NumArgs++] = V;
986  }
987 
988  void AddSourceRange(const CharSourceRange &R) const {
989  assert(isActive() && "Clients must not add to cleared diagnostic!");
990  DiagObj->DiagRanges.push_back(R);
991  }
992 
993  void AddFixItHint(const FixItHint &Hint) const {
994  assert(isActive() && "Clients must not add to cleared diagnostic!");
995  if (!Hint.isNull())
996  DiagObj->DiagFixItHints.push_back(Hint);
997  }
998 
999  void addFlagValue(StringRef V) const { DiagObj->FlagValue = V; }
1000 };
1001 
1003  explicit AddFlagValue(StringRef V) : Val(V) {}
1004  StringRef Val;
1005 };
1006 
1007 /// \brief Register a value for the flag in the current diagnostic. This
1008 /// value will be shown as the suffix "=value" after the flag name. It is
1009 /// useful in cases where the diagnostic flag accepts values (e.g.,
1010 /// -Rpass or -Wframe-larger-than).
1012  const AddFlagValue V) {
1013  DB.addFlagValue(V.Val);
1014  return DB;
1015 }
1016 
1018  StringRef S) {
1019  DB.AddString(S);
1020  return DB;
1021 }
1022 
1024  const char *Str) {
1025  DB.AddTaggedVal(reinterpret_cast<intptr_t>(Str),
1027  return DB;
1028 }
1029 
1030 inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, int I) {
1032  return DB;
1033 }
1034 
1035 // We use enable_if here to prevent that this overload is selected for
1036 // pointers or other arguments that are implicitly convertible to bool.
1037 template <typename T>
1038 inline
1039 typename std::enable_if<std::is_same<T, bool>::value,
1040  const DiagnosticBuilder &>::type
1043  return DB;
1044 }
1045 
1047  unsigned I) {
1049  return DB;
1050 }
1051 
1053  tok::TokenKind I) {
1054  DB.AddTaggedVal(static_cast<unsigned>(I), DiagnosticsEngine::ak_tokenkind);
1055  return DB;
1056 }
1057 
1059  const IdentifierInfo *II) {
1060  DB.AddTaggedVal(reinterpret_cast<intptr_t>(II),
1062  return DB;
1063 }
1064 
1065 // Adds a DeclContext to the diagnostic. The enable_if template magic is here
1066 // so that we only match those arguments that are (statically) DeclContexts;
1067 // other arguments that derive from DeclContext (e.g., RecordDecls) will not
1068 // match.
1069 template<typename T>
1070 inline
1071 typename std::enable_if<std::is_same<T, DeclContext>::value,
1072  const DiagnosticBuilder &>::type
1073 operator<<(const DiagnosticBuilder &DB, T *DC) {
1074  DB.AddTaggedVal(reinterpret_cast<intptr_t>(DC),
1076  return DB;
1077 }
1078 
1080  const SourceRange &R) {
1082  return DB;
1083 }
1084 
1087  for (const SourceRange &R: Ranges)
1089  return DB;
1090 }
1091 
1093  const CharSourceRange &R) {
1094  DB.AddSourceRange(R);
1095  return DB;
1096 }
1097 
1099  const FixItHint &Hint) {
1100  DB.AddFixItHint(Hint);
1101  return DB;
1102 }
1103 
1105  ArrayRef<FixItHint> Hints) {
1106  for (const FixItHint &Hint : Hints)
1107  DB.AddFixItHint(Hint);
1108  return DB;
1109 }
1110 
1111 /// A nullability kind paired with a bit indicating whether it used a
1112 /// context-sensitive keyword.
1113 typedef std::pair<NullabilityKind, bool> DiagNullabilityKind;
1114 
1116  DiagNullabilityKind nullability);
1117 
1119  unsigned DiagID) {
1120  assert(CurDiagID == ~0U && "Multiple diagnostics in flight at once!");
1121  CurDiagLoc = Loc;
1122  CurDiagID = DiagID;
1123  FlagValue.clear();
1124  return DiagnosticBuilder(this);
1125 }
1126 
1128  return Report(SourceLocation(), DiagID);
1129 }
1130 
1131 //===----------------------------------------------------------------------===//
1132 // Diagnostic
1133 //===----------------------------------------------------------------------===//
1134 
1135 /// A little helper class (which is basically a smart pointer that forwards
1136 /// info from DiagnosticsEngine) that allows clients to enquire about the
1137 /// currently in-flight diagnostic.
1138 class Diagnostic {
1139  const DiagnosticsEngine *DiagObj;
1140  StringRef StoredDiagMessage;
1141 public:
1142  explicit Diagnostic(const DiagnosticsEngine *DO) : DiagObj(DO) {}
1143  Diagnostic(const DiagnosticsEngine *DO, StringRef storedDiagMessage)
1144  : DiagObj(DO), StoredDiagMessage(storedDiagMessage) {}
1145 
1146  const DiagnosticsEngine *getDiags() const { return DiagObj; }
1147  unsigned getID() const { return DiagObj->CurDiagID; }
1148  const SourceLocation &getLocation() const { return DiagObj->CurDiagLoc; }
1149  bool hasSourceManager() const { return DiagObj->hasSourceManager(); }
1150  SourceManager &getSourceManager() const { return DiagObj->getSourceManager();}
1151 
1152  unsigned getNumArgs() const { return DiagObj->NumDiagArgs; }
1153 
1154  /// \brief Return the kind of the specified index.
1155  ///
1156  /// Based on the kind of argument, the accessors below can be used to get
1157  /// the value.
1158  ///
1159  /// \pre Idx < getNumArgs()
1161  assert(Idx < getNumArgs() && "Argument index out of range!");
1162  return (DiagnosticsEngine::ArgumentKind)DiagObj->DiagArgumentsKind[Idx];
1163  }
1164 
1165  /// \brief Return the provided argument string specified by \p Idx.
1166  /// \pre getArgKind(Idx) == DiagnosticsEngine::ak_std_string
1167  const std::string &getArgStdStr(unsigned Idx) const {
1169  "invalid argument accessor!");
1170  return DiagObj->DiagArgumentsStr[Idx];
1171  }
1172 
1173  /// \brief Return the specified C string argument.
1174  /// \pre getArgKind(Idx) == DiagnosticsEngine::ak_c_string
1175  const char *getArgCStr(unsigned Idx) const {
1176  assert(getArgKind(Idx) == DiagnosticsEngine::ak_c_string &&
1177  "invalid argument accessor!");
1178  return reinterpret_cast<const char*>(DiagObj->DiagArgumentsVal[Idx]);
1179  }
1180 
1181  /// \brief Return the specified signed integer argument.
1182  /// \pre getArgKind(Idx) == DiagnosticsEngine::ak_sint
1183  int getArgSInt(unsigned Idx) const {
1184  assert(getArgKind(Idx) == DiagnosticsEngine::ak_sint &&
1185  "invalid argument accessor!");
1186  return (int)DiagObj->DiagArgumentsVal[Idx];
1187  }
1188 
1189  /// \brief Return the specified unsigned integer argument.
1190  /// \pre getArgKind(Idx) == DiagnosticsEngine::ak_uint
1191  unsigned getArgUInt(unsigned Idx) const {
1192  assert(getArgKind(Idx) == DiagnosticsEngine::ak_uint &&
1193  "invalid argument accessor!");
1194  return (unsigned)DiagObj->DiagArgumentsVal[Idx];
1195  }
1196 
1197  /// \brief Return the specified IdentifierInfo argument.
1198  /// \pre getArgKind(Idx) == DiagnosticsEngine::ak_identifierinfo
1199  const IdentifierInfo *getArgIdentifier(unsigned Idx) const {
1201  "invalid argument accessor!");
1202  return reinterpret_cast<IdentifierInfo*>(DiagObj->DiagArgumentsVal[Idx]);
1203  }
1204 
1205  /// \brief Return the specified non-string argument in an opaque form.
1206  /// \pre getArgKind(Idx) != DiagnosticsEngine::ak_std_string
1207  intptr_t getRawArg(unsigned Idx) const {
1209  "invalid argument accessor!");
1210  return DiagObj->DiagArgumentsVal[Idx];
1211  }
1212 
1213  /// \brief Return the number of source ranges associated with this diagnostic.
1214  unsigned getNumRanges() const {
1215  return DiagObj->DiagRanges.size();
1216  }
1217 
1218  /// \pre Idx < getNumRanges()
1219  const CharSourceRange &getRange(unsigned Idx) const {
1220  assert(Idx < getNumRanges() && "Invalid diagnostic range index!");
1221  return DiagObj->DiagRanges[Idx];
1222  }
1223 
1224  /// \brief Return an array reference for this diagnostic's ranges.
1226  return DiagObj->DiagRanges;
1227  }
1228 
1229  unsigned getNumFixItHints() const {
1230  return DiagObj->DiagFixItHints.size();
1231  }
1232 
1233  const FixItHint &getFixItHint(unsigned Idx) const {
1234  assert(Idx < getNumFixItHints() && "Invalid index!");
1235  return DiagObj->DiagFixItHints[Idx];
1236  }
1237 
1239  return DiagObj->DiagFixItHints;
1240  }
1241 
1242  /// \brief Format this diagnostic into a string, substituting the
1243  /// formal arguments into the %0 slots.
1244  ///
1245  /// The result is appended onto the \p OutStr array.
1246  void FormatDiagnostic(SmallVectorImpl<char> &OutStr) const;
1247 
1248  /// \brief Format the given format-string into the output buffer using the
1249  /// arguments stored in this diagnostic.
1250  void FormatDiagnostic(const char *DiagStr, const char *DiagEnd,
1251  SmallVectorImpl<char> &OutStr) const;
1252 };
1253 
1254 /**
1255  * \brief Represents a diagnostic in a form that can be retained until its
1256  * corresponding source manager is destroyed.
1257  */
1259  unsigned ID;
1261  FullSourceLoc Loc;
1262  std::string Message;
1263  std::vector<CharSourceRange> Ranges;
1264  std::vector<FixItHint> FixIts;
1265 
1266 public:
1267  StoredDiagnostic();
1269  StoredDiagnostic(DiagnosticsEngine::Level Level, unsigned ID,
1270  StringRef Message);
1271  StoredDiagnostic(DiagnosticsEngine::Level Level, unsigned ID,
1272  StringRef Message, FullSourceLoc Loc,
1274  ArrayRef<FixItHint> Fixits);
1276 
1277  /// \brief Evaluates true when this object stores a diagnostic.
1278  explicit operator bool() const { return Message.size() > 0; }
1279 
1280  unsigned getID() const { return ID; }
1281  DiagnosticsEngine::Level getLevel() const { return Level; }
1282  const FullSourceLoc &getLocation() const { return Loc; }
1283  StringRef getMessage() const { return Message; }
1284 
1285  void setLocation(FullSourceLoc Loc) { this->Loc = Loc; }
1286 
1287  typedef std::vector<CharSourceRange>::const_iterator range_iterator;
1288  range_iterator range_begin() const { return Ranges.begin(); }
1289  range_iterator range_end() const { return Ranges.end(); }
1290  unsigned range_size() const { return Ranges.size(); }
1291 
1293  return llvm::makeArrayRef(Ranges);
1294  }
1295 
1296 
1297  typedef std::vector<FixItHint>::const_iterator fixit_iterator;
1298  fixit_iterator fixit_begin() const { return FixIts.begin(); }
1299  fixit_iterator fixit_end() const { return FixIts.end(); }
1300  unsigned fixit_size() const { return FixIts.size(); }
1301 
1303  return llvm::makeArrayRef(FixIts);
1304  }
1305 };
1306 
1307 /// \brief Abstract interface, implemented by clients of the front-end, which
1308 /// formats and prints fully processed diagnostics.
1310 protected:
1311  unsigned NumWarnings; ///< Number of warnings reported
1312  unsigned NumErrors; ///< Number of errors reported
1313 
1314 public:
1316 
1317  unsigned getNumErrors() const { return NumErrors; }
1318  unsigned getNumWarnings() const { return NumWarnings; }
1319  virtual void clear() { NumWarnings = NumErrors = 0; }
1320 
1321  virtual ~DiagnosticConsumer();
1322 
1323  /// \brief Callback to inform the diagnostic client that processing
1324  /// of a source file is beginning.
1325  ///
1326  /// Note that diagnostics may be emitted outside the processing of a source
1327  /// file, for example during the parsing of command line options. However,
1328  /// diagnostics with source range information are required to only be emitted
1329  /// in between BeginSourceFile() and EndSourceFile().
1330  ///
1331  /// \param LangOpts The language options for the source file being processed.
1332  /// \param PP The preprocessor object being used for the source; this is
1333  /// optional, e.g., it may not be present when processing AST source files.
1334  virtual void BeginSourceFile(const LangOptions &LangOpts,
1335  const Preprocessor *PP = nullptr) {}
1336 
1337  /// \brief Callback to inform the diagnostic client that processing
1338  /// of a source file has ended.
1339  ///
1340  /// The diagnostic client should assume that any objects made available via
1341  /// BeginSourceFile() are inaccessible.
1342  virtual void EndSourceFile() {}
1343 
1344  /// \brief Callback to inform the diagnostic client that processing of all
1345  /// source files has ended.
1346  virtual void finish() {}
1347 
1348  /// \brief Indicates whether the diagnostics handled by this
1349  /// DiagnosticConsumer should be included in the number of diagnostics
1350  /// reported by DiagnosticsEngine.
1351  ///
1352  /// The default implementation returns true.
1353  virtual bool IncludeInDiagnosticCounts() const;
1354 
1355  /// \brief Handle this diagnostic, reporting it to the user or
1356  /// capturing it to a log as needed.
1357  ///
1358  /// The default implementation just keeps track of the total number of
1359  /// warnings and errors.
1360  virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
1361  const Diagnostic &Info);
1362 };
1363 
1364 /// \brief A diagnostic client that ignores all diagnostics.
1366  virtual void anchor();
1367  void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
1368  const Diagnostic &Info) override {
1369  // Just ignore it.
1370  }
1371 };
1372 
1373 /// \brief Diagnostic consumer that forwards diagnostics along to an
1374 /// existing, already-initialized diagnostic consumer.
1375 ///
1377  DiagnosticConsumer &Target;
1378 
1379 public:
1381 
1382  ~ForwardingDiagnosticConsumer() override;
1383 
1385  const Diagnostic &Info) override;
1386  void clear() override;
1387 
1388  bool IncludeInDiagnosticCounts() const override;
1389 };
1390 
1391 // Struct used for sending info about how a type should be printed.
1393  intptr_t FromType;
1394  intptr_t ToType;
1395  unsigned PrintTree : 1;
1396  unsigned PrintFromType : 1;
1397  unsigned ElideType : 1;
1398  unsigned ShowColors : 1;
1399  // The printer sets this variable to true if the template diff was used.
1400  unsigned TemplateDiffUsed : 1;
1401 };
1402 
1403 /// Special character that the diagnostic printer will use to toggle the bold
1404 /// attribute. The character itself will be not be printed.
1405 const char ToggleHighlight = 127;
1406 
1407 
1408 /// ProcessWarningOptions - Initialize the diagnostic client and process the
1409 /// warning options specified on the command line.
1411  const DiagnosticOptions &Opts,
1412  bool ReportDiags = true);
1413 
1414 } // end namespace clang
1415 
1416 #endif
void setSeverityForAll(diag::Flavor Flavor, diag::Severity Map, SourceLocation Loc=SourceLocation())
Add the specified mapping to all diagnostics of the specified flavor.
Definition: Diagnostic.cpp:324
static DiagnosticBuilder Diag(DiagnosticsEngine *Diags, const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd, unsigned DiagID)
Produce a diagnostic highlighting some portion of a literal.
unsigned getNumWarnings() const
Definition: Diagnostic.h:587
std::vector< CharSourceRange >::const_iterator range_iterator
Definition: Diagnostic.h:1287
static FixItHint CreateRemoval(SourceRange RemoveRange)
Definition: Diagnostic.h:109
DiagnosticConsumer * getClient()
Definition: Diagnostic.h:368
bool isActive() const
Determine whether this diagnostic is still active.
Definition: Diagnostic.h:909
void setShowColors(bool Val=false)
Set color printing, so the type diffing will inject color markers into the output.
Definition: Diagnostic.h:482
void pushMappings(SourceLocation Loc)
Copies the current DiagMappings and pushes the new copy onto the top of the stack.
Definition: Diagnostic.cpp:98
unsigned getNumArgs() const
Definition: Diagnostic.h:1152
unsigned getTemplateBacktraceLimit() const
Retrieve the maximum number of template instantiation notes to emit along with a given diagnostic...
Definition: Diagnostic.h:421
StringRef getFlagValue() const
Return the value associated with this diagnostic flag.
Definition: Diagnostic.h:708
bool getIgnoreAllWarnings() const
Definition: Diagnostic.h:441
unsigned NumErrors
Number of errors reported.
Definition: Diagnostic.h:1312
static CharSourceRange getTokenRange(SourceRange R)
void setShowOverloads(OverloadsShown Val)
Specify which overload candidates to show when overload resolution fails.
Definition: Diagnostic.h:489
StringRef getMessage() const
Definition: Diagnostic.h:1283
const std::string & getArgStdStr(unsigned Idx) const
Return the provided argument string specified by Idx.
Definition: Diagnostic.h:1167
~DiagnosticBuilder()
Emits the diagnostic.
Definition: Diagnostic.h:953
Represents a diagnostic in a form that can be retained until its corresponding source manager is dest...
Definition: Diagnostic.h:1258
bool hasErrorOccurred() const
Definition: Diagnostic.h:573
const DiagnosticBuilder & operator<<(const DiagnosticBuilder &DB, const Attr *At)
Definition: Attr.h:154
void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info) override
Handle this diagnostic, reporting it to the user or capturing it to a log as needed.
Definition: Diagnostic.cpp:990
const FullSourceLoc & getLocation() const
Definition: Diagnostic.h:1282
std::string CodeToInsert
The actual code to insert at the insertion location, as a string.
Definition: Diagnostic.h:64
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1118
static FixItHint CreateInsertionFromRange(SourceLocation InsertionLoc, CharSourceRange FromRange, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code from FromRange at a specific location...
Definition: Diagnostic.h:91
unsigned getID() const
Definition: Diagnostic.h:1147
void ConvertArgToString(ArgumentKind Kind, intptr_t Val, StringRef Modifier, StringRef Argument, ArrayRef< ArgumentValue > PrevArgs, SmallVectorImpl< char > &Output, ArrayRef< intptr_t > QualTypeVals) const
Converts a diagnostic argument (as an intptr_t) into the string that represents it.
Definition: Diagnostic.h:609
bool setDiagnosticGroupWarningAsError(StringRef Group, bool Enabled)
Set the warning-as-error flag for the given diagnostic group.
Definition: Diagnostic.cpp:263
std::unique_ptr< DiagnosticConsumer > takeClient()
Return the current diagnostic client along with ownership of that client.
Definition: Diagnostic.h:376
bool hasErrorOccurred() const
Determine whether any errors have occurred since this object instance was created.
Definition: Diagnostic.h:833
bool getWarningsAsErrors() const
Definition: Diagnostic.h:452
virtual void EndSourceFile()
Callback to inform the diagnostic client that processing of a source file has ended.
Definition: Diagnostic.h:1342
Abstract interface, implemented by clients of the front-end, which formats and prints fully processed...
Definition: Diagnostic.h:1309
RAII class that determines when any errors have occurred between the time the instance was created an...
Definition: Diagnostic.h:822
void SetDelayedDiagnostic(unsigned DiagID, StringRef Arg1="", StringRef Arg2="")
Set the "delayed" diagnostic that will be emitted once the current diagnostic completes.
Definition: Diagnostic.cpp:140
void setTemplateBacktraceLimit(unsigned Limit)
Specify the maximum number of template instantiation notes to emit along with a given diagnostic...
Definition: Diagnostic.h:415
void Clear() const
Clear out the current diagnostic.
Definition: Diagnostic.h:902
fixit_iterator fixit_end() const
Definition: Diagnostic.h:1299
void AddTaggedVal(intptr_t V, DiagnosticsEngine::ArgumentKind Kind) const
Definition: Diagnostic.h:980
unsigned getNumWarnings() const
Definition: Diagnostic.h:1318
void setClient(DiagnosticConsumer *client, bool ShouldOwnClient=true)
Set the diagnostic client associated with this diagnostic object.
Definition: Diagnostic.cpp:92
LineState State
void IncrementAllExtensionsSilenced()
Counter bumped when an extension block is/ encountered.
Definition: Diagnostic.h:522
const DiagnosticsEngine * getDiags() const
Definition: Diagnostic.h:1146
bool isDiagnosticInFlight() const
Determine whethere there is already a diagnostic in flight.
Definition: Diagnostic.h:678
bool setDiagnosticGroupErrorAsFatal(StringRef Group, bool Enabled)
Set the error-as-fatal flag for the given diagnostic group.
Definition: Diagnostic.cpp:294
int getArgSInt(unsigned Idx) const
Return the specified signed integer argument.
Definition: Diagnostic.h:1183
void setExtensionHandlingBehavior(diag::Severity H)
Controls whether otherwise-unmapped extension diagnostics are mapped onto ignore/warning/error.
Definition: Diagnostic.h:515
ForwardingDiagnosticConsumer(DiagnosticConsumer &Target)
Definition: Diagnostic.h:1380
void addFlagValue(StringRef V) const
Definition: Diagnostic.h:999
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:48
SourceManager & getSourceManager() const
Definition: Diagnostic.h:379
static DiagnosticBuilder getEmpty()
Retrieve an empty diagnostic builder.
Definition: Diagnostic.h:948
void setPrintTemplateTree(bool Val=false)
Set tree printing, to outputting the template difference in a tree format.
Definition: Diagnostic.h:477
std::pair< NullabilityKind, bool > DiagNullabilityKind
Definition: Diagnostic.h:1113
void setSourceManager(SourceManager *SrcMgr)
Definition: Diagnostic.h:383
bool hasUnrecoverableErrorOccurred() const
Determine whether any kind of unrecoverable error has occurred.
Definition: Diagnostic.h:583
bool hasUnrecoverableErrorOccurred() const
Determine whether any unrecoverable errors have occurred since this object instance was created...
Definition: Diagnostic.h:839
bool isLastDiagnosticIgnored() const
Determine whether the previous diagnostic was ignored. This can be used by clients that want to deter...
Definition: Diagnostic.h:507
const SourceLocation & getLocation() const
Definition: Diagnostic.h:1148
SmallVector< CharSourceRange, 8 > Ranges
Definition: Format.cpp:1554
unsigned getNumRanges() const
Return the number of source ranges associated with this diagnostic.
Definition: Diagnostic.h:1214
virtual bool IncludeInDiagnosticCounts() const
Indicates whether the diagnostics handled by this DiagnosticConsumer should be included in the number...
Definition: Diagnostic.cpp:984
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:135
bool setSeverityForGroup(diag::Flavor Flavor, StringRef Group, diag::Severity Map, SourceLocation Loc=SourceLocation())
Change an entire diagnostic group (e.g. "unknown-pragmas") to have the specified mapping.
Definition: Diagnostic.cpp:248
unsigned getID() const
Definition: Diagnostic.h:1280
llvm::iterator_range< DiagState::const_iterator > diag_mapping_range
Definition: Diagnostic.h:360
fixit_iterator fixit_begin() const
Definition: Diagnostic.h:1298
DiagnosticBuilder(const DiagnosticBuilder &D)
Definition: Diagnostic.h:939
const char * getArgCStr(unsigned Idx) const
Return the specified C string argument.
Definition: Diagnostic.h:1175
const IntrusiveRefCntPtr< DiagnosticIDs > & getDiagnosticIDs() const
Definition: Diagnostic.h:353
void Reset()
Reset the state of the diagnostic object to its initial configuration.
Definition: Diagnostic.cpp:114
bool IncludeInDiagnosticCounts() const override
Indicates whether the diagnostics handled by this DiagnosticConsumer should be included in the number...
Diagnostic(const DiagnosticsEngine *DO, StringRef storedDiagMessage)
Definition: Diagnostic.h:1143
const IdentifierInfo * getArgIdentifier(unsigned Idx) const
Return the specified IdentifierInfo argument.
Definition: Diagnostic.h:1199
bool EmitCurrentDiagnostic(bool Force=false)
Emit the current diagnostic and clear the diagnostic state.
Definition: Diagnostic.cpp:362
const DiagnosticConsumer * getClient() const
Definition: Diagnostic.h:369
void setLastDiagnosticIgnored()
Pretend that the last diagnostic issued was ignored, so any subsequent notes will be suppressed...
Definition: Diagnostic.h:498
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:258
diag::Severity getExtensionHandlingBehavior() const
Definition: Diagnostic.h:516
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:866
unsigned getCurrentDiagID() const
Definition: Diagnostic.h:809
friend class DiagnosticBuilder
Definition: Diagnostic.h:721
Represents a character-granular source range.
bool hasFatalErrorOccurred() const
Definition: Diagnostic.h:580
DiagnosticErrorTrap(DiagnosticsEngine &Diag)
Definition: Diagnostic.h:828
range_iterator range_begin() const
Definition: Diagnostic.h:1288
void setElideType(bool Val=true)
Set type eliding, to skip outputting same types occurring in template types.
Definition: Diagnostic.h:472
#define bool
Definition: stdbool.h:31
intptr_t getRawArg(unsigned Idx) const
Return the specified non-string argument in an opaque form.
Definition: Diagnostic.h:1207
diag_mapping_range getDiagnosticMappings() const
Get the current set of diagnostic mappings.
Definition: Diagnostic.h:363
AddFlagValue(StringRef V)
Definition: Diagnostic.h:1003
std::pair< ArgumentKind, intptr_t > ArgumentValue
Represents on argument value, which is a union discriminated by ArgumentKind, with a value...
Definition: Diagnostic.h:168
unsigned getConstexprBacktraceLimit() const
Retrieve the maximum number of constexpr evaluation notes to emit along with a given diagnostic...
Definition: Diagnostic.h:433
void AddString(StringRef S) const
Definition: Diagnostic.h:972
void Clear()
Clear out the current diagnostic.
Definition: Diagnostic.h:705
void AddSourceRange(const CharSourceRange &R) const
Definition: Diagnostic.h:988
bool BeforePreviousInsertions
Definition: Diagnostic.h:66
void setEnableAllWarnings(bool Val)
When set to true, any unmapped ignored warnings are no longer ignored.
Definition: Diagnostic.h:447
The result type of a method or function.
CharSourceRange InsertFromRange
Code in the specific range that should be inserted in the insertion location.
Definition: Diagnostic.h:60
static CharSourceRange getCharRange(SourceRange R)
void AddFixItHint(const FixItHint &Hint) const
Definition: Diagnostic.h:993
bool getSuppressSystemWarnings() const
Definition: Diagnostic.h:460
CharSourceRange RemoveRange
Code that should be replaced to correct the error. Empty for an insertion hint.
Definition: Diagnostic.h:56
ArrayRef< FixItHint > getFixIts() const
Definition: Diagnostic.h:1302
#define false
Definition: stdbool.h:33
Kind
void setSuppressSystemWarnings(bool Val)
When set to true mask warnings that come from system headers.
Definition: Diagnostic.h:459
Encodes a location in the source. The SourceManager can decode this to get at the full include stack...
bool isValid() const
Return true if this is a valid SourceLocation object.
Options for controlling the compiler diagnostics engine.
virtual void finish()
Callback to inform the diagnostic client that processing of all source files has ended.
Definition: Diagnostic.h:1346
bool getSuppressAllDiagnostics() const
Definition: Diagnostic.h:468
const char ToggleHighlight
Definition: Diagnostic.h:1405
Diagnostic consumer that forwards diagnostics along to an existing, already-initialized diagnostic co...
Definition: Diagnostic.h:1376
void ProcessWarningOptions(DiagnosticsEngine &Diags, const DiagnosticOptions &Opts, bool ReportDiags=true)
Definition: Warnings.cpp:44
void reset()
Set to initial state of "no errors occurred".
Definition: Diagnostic.h:844
unsigned range_size() const
Definition: Diagnostic.h:1290
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
void SetArgToStringFn(ArgToStringFnTy Fn, void *Cookie)
Definition: Diagnostic.h:618
unsigned NumWarnings
Number of warnings reported.
Definition: Diagnostic.h:1311
void setNoErrorAsFatal(bool Value)
DiagnosticOptions & getDiagnosticOptions() const
Retrieve the diagnostic options.
Definition: Diagnostic.h:358
virtual void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel, const Diagnostic &Info)
Handle this diagnostic, reporting it to the user or capturing it to a log as needed.
Definition: Diagnostic.cpp:398
unsigned getCustomDiagID(Level L, const char(&FormatString)[N])
Return an ID for a diagnostic with the specified format string and level.
Definition: Diagnostic.h:602
bool operator<(DeclarationName LHS, DeclarationName RHS)
bool getEnableAllWarnings() const
Definition: Diagnostic.h:448
void setNumWarnings(unsigned NumWarnings)
Definition: Diagnostic.h:589
static DiagnosticMapping Make(diag::Severity Severity, bool IsUser, bool IsPragma)
Definition: DiagnosticIDs.h:89
bool isIgnored(unsigned DiagID, SourceLocation Loc) const
Determine whether the diagnostic is known to be ignored.
Definition: Diagnostic.h:645
const DiagnosticBuilder & setForceEmit() const
Forces the diagnostic to be emitted.
Definition: Diagnostic.h:958
DiagnosticsEngine::ArgumentKind getArgKind(unsigned Idx) const
Return the kind of the specified index.
Definition: Diagnostic.h:1160
Defines various enumerations that describe declaration and type specifiers.
void setErrorLimit(unsigned Limit)
Specify a limit for the number of errors we should emit before giving up.
Definition: Diagnostic.h:411
void setIgnoreAllWarnings(bool Val)
When set to true, any unmapped warnings are ignored.
Definition: Diagnostic.h:440
A diagnostic client that ignores all diagnostics.
Definition: Diagnostic.h:1365
range_iterator range_end() const
Definition: Diagnostic.h:1289
bool hasSourceManager() const
Definition: Diagnostic.h:1149
const internal::VariadicAllOfMatcher< Type > type
Matches Types in the clang AST.
Definition: ASTMatchers.h:1639
Reads an AST files chain containing the contents of a translation unit.
Definition: ASTReader.h:302
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:104
Level
The level of the diagnostic, after it has been through mapping.
Used for handling and querying diagnostic IDs.
bool getErrorsAsFatal() const
Definition: Diagnostic.h:456
void setErrorsAsFatal(bool Val)
When set to true, any error reported is made a fatal error.
Definition: Diagnostic.h:455
ArrayRef< CharSourceRange > getRanges() const
Return an array reference for this diagnostic's ranges.
Definition: Diagnostic.h:1225
unsigned Map[Count]
Definition: AddressSpaces.h:45
const FixItHint & getFixItHint(unsigned Idx) const
Definition: Diagnostic.h:1233
std::vector< FixItHint >::const_iterator fixit_iterator
Definition: Diagnostic.h:1297
bool hasSourceManager() const
Definition: Diagnostic.h:378
void setWarningsAsErrors(bool Val)
When set to true, any warnings reported are issued as errors.
Definition: Diagnostic.h:451
SourceManager & getSourceManager() const
Definition: Diagnostic.h:1150
void setSeverity(diag::kind Diag, diag::Severity Map, SourceLocation Loc)
This allows the client to specify that certain warnings are ignored.
Definition: Diagnostic.cpp:180
bool isNull() const
Definition: Diagnostic.h:72
bool popMappings(SourceLocation Loc)
Pops the current DiagMappings off the top of the stack, causing the new top of the stack to be the ac...
Definition: Diagnostic.cpp:102
void setConstexprBacktraceLimit(unsigned Limit)
Specify the maximum number of constexpr evaluation notes to emit along with a given diagnostic...
Definition: Diagnostic.h:427
unsigned fixit_size() const
Definition: Diagnostic.h:1300
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:78
ArrayRef< CharSourceRange > getRanges() const
Definition: Diagnostic.h:1292
Diagnostic(const DiagnosticsEngine *DO)
Definition: Diagnostic.h:1142
void DecrementAllExtensionsSilenced()
Definition: Diagnostic.h:523
void setSuppressAllDiagnostics(bool Val=true)
Suppress all diagnostics, to silence the front end when we know that we don't want any more diagnosti...
Definition: Diagnostic.h:465
static FixItHint CreateReplacement(SourceRange RemoveRange, StringRef Code)
Definition: Diagnostic.h:123
Defines the clang::SourceLocation class and associated facilities.
OverloadsShown
Specifies which overload candidates to display when overload resolution fails.
OverloadsShown getShowOverloads() const
Definition: Diagnostic.h:492
Level
The level of the diagnostic, after it has been through mapping.
Definition: Diagnostic.h:141
Do not present this diagnostic, ignore it.
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:115
Writes an AST file containing the contents of a translation unit.
Definition: ASTWriter.h:82
const CharSourceRange & getRange(unsigned Idx) const
Definition: Diagnostic.h:1219
unsigned getNumFixItHints() const
Definition: Diagnostic.h:1229
DiagnosticsEngine::Level getLevel() const
Definition: Diagnostic.h:1281
A SourceLocation and its associated SourceManager.
Defines the Diagnostic IDs-related interfaces.
unsigned getNumErrors() const
Definition: Diagnostic.h:1317
unsigned getArgUInt(unsigned Idx) const
Return the specified unsigned integer argument.
Definition: Diagnostic.h:1191
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:52
SourceLocation getCurrentDiagLoc() const
Definition: Diagnostic.h:811
void setNoWarningAsError(bool Value)
bool Emit()
Force the diagnostic builder to emit the diagnostic now.
Definition: Diagnostic.h:918
#define true
Definition: stdbool.h:32
bool ownsClient() const
Determine whether this DiagnosticsEngine object own its client.
Definition: Diagnostic.h:372
A trivial tuple used to represent a source range.
void setLocation(FullSourceLoc Loc)
Definition: Diagnostic.h:1285
void FormatDiagnostic(SmallVectorImpl< char > &OutStr) const
Format this diagnostic into a string, substituting the formal arguments into the %0 slots...
Definition: Diagnostic.cpp:630
Level getDiagnosticLevel(unsigned DiagID, SourceLocation Loc) const
Based on the way the client configured the DiagnosticsEngine object, classify the specified diagnosti...
Definition: Diagnostic.h:660
virtual void BeginSourceFile(const LangOptions &LangOpts, const Preprocessor *PP=nullptr)
Callback to inform the diagnostic client that processing of a source file is beginning.
Definition: Diagnostic.h:1334
FixItHint()
Empty code modification hint, indicating that no code modification is known.
Definition: Diagnostic.h:70
bool hasUncompilableErrorOccurred() const
Errors that actually prevent compilation, not those that are upgraded from a warning by -Werror...
Definition: Diagnostic.h:577
This class handles loading and caching of source files into memory.
ArrayRef< FixItHint > getFixItHints() const
Definition: Diagnostic.h:1238
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:96
enum TokenKind : unsigned
Definition: Diagnostic.h:155
void notePriorDiagnosticFrom(const DiagnosticsEngine &Other)
Note that the prior diagnostic was emitted by some other DiagnosticsEngine, and we may be attaching a...
Definition: Diagnostic.h:625