Diagnostic.cpp revision d0ebe080eee7c37e73754068b47fd90cc506e128 
1//===--- Diagnostic.cpp - C Language Family Diagnostic Handling -----------===//
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//  This file implements the Diagnostic-related interfaces.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/Basic/Diagnostic.h"
15#include "clang/Basic/PartialDiagnostic.h"
16
17#include "clang/Lex/LexDiagnostic.h"
18#include "clang/Parse/ParseDiagnostic.h"
19#include "clang/AST/ASTDiagnostic.h"
20#include "clang/Sema/SemaDiagnostic.h"
21#include "clang/Frontend/FrontendDiagnostic.h"
22#include "clang/Analysis/AnalysisDiagnostic.h"
23#include "clang/Driver/DriverDiagnostic.h"
24
25#include "clang/Basic/FileManager.h"
26#include "clang/Basic/IdentifierTable.h"
27#include "clang/Basic/SourceLocation.h"
28#include "clang/Basic/SourceManager.h"
29#include "llvm/ADT/SmallVector.h"
30#include "llvm/ADT/StringExtras.h"
31#include "llvm/Support/raw_ostream.h"
32#include <vector>
33#include <map>
34#include <cstring>
35using namespace clang;
36
37//===----------------------------------------------------------------------===//
38// Builtin Diagnostic information
39//===----------------------------------------------------------------------===//
40
41// Diagnostic classes.
42enum {
43  CLASS_NOTE       = 0x01,
44  CLASS_WARNING    = 0x02,
45  CLASS_EXTENSION  = 0x03,
46  CLASS_ERROR      = 0x04
47};
48
49struct StaticDiagInfoRec {
50  unsigned short DiagID;
51  unsigned Mapping : 3;
52  unsigned Class : 3;
53  bool SFINAE : 1;
54  const char *Description;
55  const char *OptionGroup;
56
57  bool operator<(const StaticDiagInfoRec &RHS) const {
58    return DiagID < RHS.DiagID;
59  }
60  bool operator>(const StaticDiagInfoRec &RHS) const {
61    return DiagID > RHS.DiagID;
62  }
63};
64
65static const StaticDiagInfoRec StaticDiagInfo[] = {
66#define DIAG(ENUM,CLASS,DEFAULT_MAPPING,DESC,GROUP,SFINAE)    \
67  { diag::ENUM, DEFAULT_MAPPING, CLASS, SFINAE, DESC, GROUP },
68#include "clang/Basic/DiagnosticCommonKinds.inc"
69#include "clang/Basic/DiagnosticDriverKinds.inc"
70#include "clang/Basic/DiagnosticFrontendKinds.inc"
71#include "clang/Basic/DiagnosticLexKinds.inc"
72#include "clang/Basic/DiagnosticParseKinds.inc"
73#include "clang/Basic/DiagnosticASTKinds.inc"
74#include "clang/Basic/DiagnosticSemaKinds.inc"
75#include "clang/Basic/DiagnosticAnalysisKinds.inc"
76  { 0, 0, 0, 0, 0, 0}
77};
78#undef DIAG
79
80/// GetDiagInfo - Return the StaticDiagInfoRec entry for the specified DiagID,
81/// or null if the ID is invalid.
82static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) {
83  unsigned NumDiagEntries = sizeof(StaticDiagInfo)/sizeof(StaticDiagInfo[0])-1;
84
85  // If assertions are enabled, verify that the StaticDiagInfo array is sorted.
86#ifndef NDEBUG
87  static bool IsFirst = true;
88  if (IsFirst) {
89    for (unsigned i = 1; i != NumDiagEntries; ++i) {
90      assert(StaticDiagInfo[i-1].DiagID != StaticDiagInfo[i].DiagID &&
91             "Diag ID conflict, the enums at the start of clang::diag (in "
92             "Diagnostic.h) probably need to be increased");
93
94      assert(StaticDiagInfo[i-1] < StaticDiagInfo[i] &&
95             "Improperly sorted diag info");
96    }
97    IsFirst = false;
98  }
99#endif
100
101  // Search the diagnostic table with a binary search.
102  StaticDiagInfoRec Find = { DiagID, 0, 0, 0, 0, 0 };
103
104  const StaticDiagInfoRec *Found =
105    std::lower_bound(StaticDiagInfo, StaticDiagInfo + NumDiagEntries, Find);
106  if (Found == StaticDiagInfo + NumDiagEntries ||
107      Found->DiagID != DiagID)
108    return 0;
109
110  return Found;
111}
112
113static unsigned GetDefaultDiagMapping(unsigned DiagID) {
114  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
115    return Info->Mapping;
116  return diag::MAP_FATAL;
117}
118
119/// getWarningOptionForDiag - Return the lowest-level warning option that
120/// enables the specified diagnostic.  If there is no -Wfoo flag that controls
121/// the diagnostic, this returns null.
122const char *Diagnostic::getWarningOptionForDiag(unsigned DiagID) {
123  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
124    return Info->OptionGroup;
125  return 0;
126}
127
128Diagnostic::SFINAEResponse
129Diagnostic::getDiagnosticSFINAEResponse(unsigned DiagID) {
130  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) {
131    if (!Info->SFINAE)
132      return SFINAE_Report;
133
134    if (Info->Class == CLASS_ERROR)
135      return SFINAE_SubstitutionFailure;
136
137    // Suppress notes, warnings, and extensions;
138    return SFINAE_Suppress;
139  }
140
141  return SFINAE_Report;
142}
143
144/// getDiagClass - Return the class field of the diagnostic.
145///
146static unsigned getBuiltinDiagClass(unsigned DiagID) {
147  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
148    return Info->Class;
149  return ~0U;
150}
151
152//===----------------------------------------------------------------------===//
153// Custom Diagnostic information
154//===----------------------------------------------------------------------===//
155
156namespace clang {
157  namespace diag {
158    class CustomDiagInfo {
159      typedef std::pair<Diagnostic::Level, std::string> DiagDesc;
160      std::vector<DiagDesc> DiagInfo;
161      std::map<DiagDesc, unsigned> DiagIDs;
162    public:
163
164      /// getDescription - Return the description of the specified custom
165      /// diagnostic.
166      const char *getDescription(unsigned DiagID) const {
167        assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() &&
168               "Invalid diagnosic ID");
169        return DiagInfo[DiagID-DIAG_UPPER_LIMIT].second.c_str();
170      }
171
172      /// getLevel - Return the level of the specified custom diagnostic.
173      Diagnostic::Level getLevel(unsigned DiagID) const {
174        assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() &&
175               "Invalid diagnosic ID");
176        return DiagInfo[DiagID-DIAG_UPPER_LIMIT].first;
177      }
178
179      unsigned getOrCreateDiagID(Diagnostic::Level L, llvm::StringRef Message,
180                                 Diagnostic &Diags) {
181        DiagDesc D(L, Message);
182        // Check to see if it already exists.
183        std::map<DiagDesc, unsigned>::iterator I = DiagIDs.lower_bound(D);
184        if (I != DiagIDs.end() && I->first == D)
185          return I->second;
186
187        // If not, assign a new ID.
188        unsigned ID = DiagInfo.size()+DIAG_UPPER_LIMIT;
189        DiagIDs.insert(std::make_pair(D, ID));
190        DiagInfo.push_back(D);
191        return ID;
192      }
193    };
194
195  } // end diag namespace
196} // end clang namespace
197
198
199//===----------------------------------------------------------------------===//
200// Common Diagnostic implementation
201//===----------------------------------------------------------------------===//
202
203static void DummyArgToStringFn(Diagnostic::ArgumentKind AK, intptr_t QT,
204                               const char *Modifier, unsigned ML,
205                               const char *Argument, unsigned ArgLen,
206                               const Diagnostic::ArgumentValue *PrevArgs,
207                               unsigned NumPrevArgs,
208                               llvm::SmallVectorImpl<char> &Output,
209                               void *Cookie) {
210  const char *Str = "<can't format argument>";
211  Output.append(Str, Str+strlen(Str));
212}
213
214
215Diagnostic::Diagnostic(DiagnosticClient *client) : Client(client) {
216  AllExtensionsSilenced = 0;
217  IgnoreAllWarnings = false;
218  WarningsAsErrors = false;
219  ErrorsAsFatal = false;
220  SuppressSystemWarnings = false;
221  SuppressAllDiagnostics = false;
222  ExtBehavior = Ext_Ignore;
223
224  ErrorOccurred = false;
225  FatalErrorOccurred = false;
226  NumDiagnostics = 0;
227
228  NumErrors = 0;
229  CustomDiagInfo = 0;
230  CurDiagID = ~0U;
231  LastDiagLevel = Ignored;
232
233  ArgToStringFn = DummyArgToStringFn;
234  ArgToStringCookie = 0;
235
236  DelayedDiagID = 0;
237
238  // Set all mappings to 'unset'.
239  DiagMappings BlankDiags(diag::DIAG_UPPER_LIMIT/2, 0);
240  DiagMappingsStack.push_back(BlankDiags);
241}
242
243Diagnostic::~Diagnostic() {
244  delete CustomDiagInfo;
245}
246
247
248void Diagnostic::pushMappings() {
249  // Avoids undefined behavior when the stack has to resize.
250  DiagMappingsStack.reserve(DiagMappingsStack.size() + 1);
251  DiagMappingsStack.push_back(DiagMappingsStack.back());
252}
253
254bool Diagnostic::popMappings() {
255  if (DiagMappingsStack.size() == 1)
256    return false;
257
258  DiagMappingsStack.pop_back();
259  return true;
260}
261
262/// getCustomDiagID - Return an ID for a diagnostic with the specified message
263/// and level.  If this is the first request for this diagnosic, it is
264/// registered and created, otherwise the existing ID is returned.
265unsigned Diagnostic::getCustomDiagID(Level L, llvm::StringRef Message) {
266  if (CustomDiagInfo == 0)
267    CustomDiagInfo = new diag::CustomDiagInfo();
268  return CustomDiagInfo->getOrCreateDiagID(L, Message, *this);
269}
270
271
272/// isBuiltinWarningOrExtension - Return true if the unmapped diagnostic
273/// level of the specified diagnostic ID is a Warning or Extension.
274/// This only works on builtin diagnostics, not custom ones, and is not legal to
275/// call on NOTEs.
276bool Diagnostic::isBuiltinWarningOrExtension(unsigned DiagID) {
277  return DiagID < diag::DIAG_UPPER_LIMIT &&
278         getBuiltinDiagClass(DiagID) != CLASS_ERROR;
279}
280
281/// \brief Determine whether the given built-in diagnostic ID is a
282/// Note.
283bool Diagnostic::isBuiltinNote(unsigned DiagID) {
284  return DiagID < diag::DIAG_UPPER_LIMIT &&
285    getBuiltinDiagClass(DiagID) == CLASS_NOTE;
286}
287
288/// isBuiltinExtensionDiag - Determine whether the given built-in diagnostic
289/// ID is for an extension of some sort.
290///
291bool Diagnostic::isBuiltinExtensionDiag(unsigned DiagID) {
292  return DiagID < diag::DIAG_UPPER_LIMIT &&
293         getBuiltinDiagClass(DiagID) == CLASS_EXTENSION;
294}
295
296
297/// getDescription - Given a diagnostic ID, return a description of the
298/// issue.
299const char *Diagnostic::getDescription(unsigned DiagID) const {
300  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
301    return Info->Description;
302  return CustomDiagInfo->getDescription(DiagID);
303}
304
305void Diagnostic::SetDelayedDiagnostic(unsigned DiagID, llvm::StringRef Arg1,
306                                      llvm::StringRef Arg2) {
307  if (DelayedDiagID)
308    return;
309
310  DelayedDiagID = DiagID;
311  DelayedDiagArg1 = Arg1.str();
312  DelayedDiagArg2 = Arg2.str();
313}
314
315void Diagnostic::ReportDelayed() {
316  Report(DelayedDiagID) << DelayedDiagArg1 << DelayedDiagArg2;
317  DelayedDiagID = 0;
318  DelayedDiagArg1.clear();
319  DelayedDiagArg2.clear();
320}
321
322/// getDiagnosticLevel - Based on the way the client configured the Diagnostic
323/// object, classify the specified diagnostic ID into a Level, consumable by
324/// the DiagnosticClient.
325Diagnostic::Level Diagnostic::getDiagnosticLevel(unsigned DiagID) const {
326  // Handle custom diagnostics, which cannot be mapped.
327  if (DiagID >= diag::DIAG_UPPER_LIMIT)
328    return CustomDiagInfo->getLevel(DiagID);
329
330  unsigned DiagClass = getBuiltinDiagClass(DiagID);
331  assert(DiagClass != CLASS_NOTE && "Cannot get diagnostic level of a note!");
332  return getDiagnosticLevel(DiagID, DiagClass);
333}
334
335/// getDiagnosticLevel - Based on the way the client configured the Diagnostic
336/// object, classify the specified diagnostic ID into a Level, consumable by
337/// the DiagnosticClient.
338Diagnostic::Level
339Diagnostic::getDiagnosticLevel(unsigned DiagID, unsigned DiagClass) const {
340  // Specific non-error diagnostics may be mapped to various levels from ignored
341  // to error.  Errors can only be mapped to fatal.
342  Diagnostic::Level Result = Diagnostic::Fatal;
343
344  // Get the mapping information, if unset, compute it lazily.
345  unsigned MappingInfo = getDiagnosticMappingInfo((diag::kind)DiagID);
346  if (MappingInfo == 0) {
347    MappingInfo = GetDefaultDiagMapping(DiagID);
348    setDiagnosticMappingInternal(DiagID, MappingInfo, false);
349  }
350
351  switch (MappingInfo & 7) {
352  default: assert(0 && "Unknown mapping!");
353  case diag::MAP_IGNORE:
354    // Ignore this, unless this is an extension diagnostic and we're mapping
355    // them onto warnings or errors.
356    if (!isBuiltinExtensionDiag(DiagID) ||  // Not an extension
357        ExtBehavior == Ext_Ignore ||        // Extensions ignored anyway
358        (MappingInfo & 8) != 0)             // User explicitly mapped it.
359      return Diagnostic::Ignored;
360    Result = Diagnostic::Warning;
361    if (ExtBehavior == Ext_Error) Result = Diagnostic::Error;
362    if (Result == Diagnostic::Error && ErrorsAsFatal)
363      Result = Diagnostic::Fatal;
364    break;
365  case diag::MAP_ERROR:
366    Result = Diagnostic::Error;
367    if (ErrorsAsFatal)
368      Result = Diagnostic::Fatal;
369    break;
370  case diag::MAP_FATAL:
371    Result = Diagnostic::Fatal;
372    break;
373  case diag::MAP_WARNING:
374    // If warnings are globally mapped to ignore or error, do it.
375    if (IgnoreAllWarnings)
376      return Diagnostic::Ignored;
377
378    Result = Diagnostic::Warning;
379
380    // If this is an extension diagnostic and we're in -pedantic-error mode, and
381    // if the user didn't explicitly map it, upgrade to an error.
382    if (ExtBehavior == Ext_Error &&
383        (MappingInfo & 8) == 0 &&
384        isBuiltinExtensionDiag(DiagID))
385      Result = Diagnostic::Error;
386
387    if (WarningsAsErrors)
388      Result = Diagnostic::Error;
389    if (Result == Diagnostic::Error && ErrorsAsFatal)
390      Result = Diagnostic::Fatal;
391    break;
392
393  case diag::MAP_WARNING_NO_WERROR:
394    // Diagnostics specified with -Wno-error=foo should be set to warnings, but
395    // not be adjusted by -Werror or -pedantic-errors.
396    Result = Diagnostic::Warning;
397
398    // If warnings are globally mapped to ignore or error, do it.
399    if (IgnoreAllWarnings)
400      return Diagnostic::Ignored;
401
402    break;
403
404  case diag::MAP_ERROR_NO_WFATAL:
405    // Diagnostics specified as -Wno-fatal-error=foo should be errors, but
406    // unaffected by -Wfatal-errors.
407    Result = Diagnostic::Error;
408    break;
409  }
410
411  // Okay, we're about to return this as a "diagnostic to emit" one last check:
412  // if this is any sort of extension warning, and if we're in an __extension__
413  // block, silence it.
414  if (AllExtensionsSilenced && isBuiltinExtensionDiag(DiagID))
415    return Diagnostic::Ignored;
416
417  return Result;
418}
419
420struct WarningOption {
421  const char  *Name;
422  const short *Members;
423  const char  *SubGroups;
424};
425
426#define GET_DIAG_ARRAYS
427#include "clang/Basic/DiagnosticGroups.inc"
428#undef GET_DIAG_ARRAYS
429
430// Second the table of options, sorted by name for fast binary lookup.
431static const WarningOption OptionTable[] = {
432#define GET_DIAG_TABLE
433#include "clang/Basic/DiagnosticGroups.inc"
434#undef GET_DIAG_TABLE
435};
436static const size_t OptionTableSize =
437sizeof(OptionTable) / sizeof(OptionTable[0]);
438
439static bool WarningOptionCompare(const WarningOption &LHS,
440                                 const WarningOption &RHS) {
441  return strcmp(LHS.Name, RHS.Name) < 0;
442}
443
444static void MapGroupMembers(const WarningOption *Group, diag::Mapping Mapping,
445                            Diagnostic &Diags) {
446  // Option exists, poke all the members of its diagnostic set.
447  if (const short *Member = Group->Members) {
448    for (; *Member != -1; ++Member)
449      Diags.setDiagnosticMapping(*Member, Mapping);
450  }
451
452  // Enable/disable all subgroups along with this one.
453  if (const char *SubGroups = Group->SubGroups) {
454    for (; *SubGroups != (char)-1; ++SubGroups)
455      MapGroupMembers(&OptionTable[(unsigned char)*SubGroups], Mapping, Diags);
456  }
457}
458
459/// setDiagnosticGroupMapping - Change an entire diagnostic group (e.g.
460/// "unknown-pragmas" to have the specified mapping.  This returns true and
461/// ignores the request if "Group" was unknown, false otherwise.
462bool Diagnostic::setDiagnosticGroupMapping(const char *Group,
463                                           diag::Mapping Map) {
464
465  WarningOption Key = { Group, 0, 0 };
466  const WarningOption *Found =
467  std::lower_bound(OptionTable, OptionTable + OptionTableSize, Key,
468                   WarningOptionCompare);
469  if (Found == OptionTable + OptionTableSize ||
470      strcmp(Found->Name, Group) != 0)
471    return true;  // Option not found.
472
473  MapGroupMembers(Found, Map, *this);
474  return false;
475}
476
477
478/// ProcessDiag - This is the method used to report a diagnostic that is
479/// finally fully formed.
480bool Diagnostic::ProcessDiag() {
481  DiagnosticInfo Info(this);
482
483  if (SuppressAllDiagnostics)
484    return false;
485
486  // Figure out the diagnostic level of this message.
487  Diagnostic::Level DiagLevel;
488  unsigned DiagID = Info.getID();
489
490  // ShouldEmitInSystemHeader - True if this diagnostic should be produced even
491  // in a system header.
492  bool ShouldEmitInSystemHeader;
493
494  if (DiagID >= diag::DIAG_UPPER_LIMIT) {
495    // Handle custom diagnostics, which cannot be mapped.
496    DiagLevel = CustomDiagInfo->getLevel(DiagID);
497
498    // Custom diagnostics always are emitted in system headers.
499    ShouldEmitInSystemHeader = true;
500  } else {
501    // Get the class of the diagnostic.  If this is a NOTE, map it onto whatever
502    // the diagnostic level was for the previous diagnostic so that it is
503    // filtered the same as the previous diagnostic.
504    unsigned DiagClass = getBuiltinDiagClass(DiagID);
505    if (DiagClass == CLASS_NOTE) {
506      DiagLevel = Diagnostic::Note;
507      ShouldEmitInSystemHeader = false;  // extra consideration is needed
508    } else {
509      // If this is not an error and we are in a system header, we ignore it.
510      // Check the original Diag ID here, because we also want to ignore
511      // extensions and warnings in -Werror and -pedantic-errors modes, which
512      // *map* warnings/extensions to errors.
513      ShouldEmitInSystemHeader = DiagClass == CLASS_ERROR;
514
515      DiagLevel = getDiagnosticLevel(DiagID, DiagClass);
516    }
517  }
518
519  if (DiagLevel != Diagnostic::Note) {
520    // Record that a fatal error occurred only when we see a second
521    // non-note diagnostic. This allows notes to be attached to the
522    // fatal error, but suppresses any diagnostics that follow those
523    // notes.
524    if (LastDiagLevel == Diagnostic::Fatal)
525      FatalErrorOccurred = true;
526
527    LastDiagLevel = DiagLevel;
528  }
529
530  // If a fatal error has already been emitted, silence all subsequent
531  // diagnostics.
532  if (FatalErrorOccurred)
533    return false;
534
535  // If the client doesn't care about this message, don't issue it.  If this is
536  // a note and the last real diagnostic was ignored, ignore it too.
537  if (DiagLevel == Diagnostic::Ignored ||
538      (DiagLevel == Diagnostic::Note && LastDiagLevel == Diagnostic::Ignored))
539    return false;
540
541  // If this diagnostic is in a system header and is not a clang error, suppress
542  // it.
543  if (SuppressSystemWarnings && !ShouldEmitInSystemHeader &&
544      Info.getLocation().isValid() &&
545      Info.getLocation().getInstantiationLoc().isInSystemHeader() &&
546      (DiagLevel != Diagnostic::Note || LastDiagLevel == Diagnostic::Ignored)) {
547    LastDiagLevel = Diagnostic::Ignored;
548    return false;
549  }
550
551  if (DiagLevel >= Diagnostic::Error) {
552    ErrorOccurred = true;
553    ++NumErrors;
554  }
555
556  // Finally, report it.
557  Client->HandleDiagnostic(DiagLevel, Info);
558  if (Client->IncludeInDiagnosticCounts()) ++NumDiagnostics;
559
560  CurDiagID = ~0U;
561
562  return true;
563}
564
565bool DiagnosticBuilder::Emit() {
566  // If DiagObj is null, then its soul was stolen by the copy ctor
567  // or the user called Emit().
568  if (DiagObj == 0) return false;
569
570  // When emitting diagnostics, we set the final argument count into
571  // the Diagnostic object.
572  DiagObj->NumDiagArgs = NumArgs;
573  DiagObj->NumDiagRanges = NumRanges;
574  DiagObj->NumFixItHints = NumFixItHints;
575
576  // Process the diagnostic, sending the accumulated information to the
577  // DiagnosticClient.
578  bool Emitted = DiagObj->ProcessDiag();
579
580  // Clear out the current diagnostic object.
581  unsigned DiagID = DiagObj->CurDiagID;
582  DiagObj->Clear();
583
584  // If there was a delayed diagnostic, emit it now.
585  if (DiagObj->DelayedDiagID && DiagObj->DelayedDiagID != DiagID)
586    DiagObj->ReportDelayed();
587
588  // This diagnostic is dead.
589  DiagObj = 0;
590
591  return Emitted;
592}
593
594
595DiagnosticClient::~DiagnosticClient() {}
596
597
598/// ModifierIs - Return true if the specified modifier matches specified string.
599template <std::size_t StrLen>
600static bool ModifierIs(const char *Modifier, unsigned ModifierLen,
601                       const char (&Str)[StrLen]) {
602  return StrLen-1 == ModifierLen && !memcmp(Modifier, Str, StrLen-1);
603}
604
605/// ScanForward - Scans forward, looking for the given character, skipping
606/// nested clauses and escaped characters.
607static const char *ScanFormat(const char *I, const char *E, char Target) {
608  unsigned Depth = 0;
609
610  for ( ; I != E; ++I) {
611    if (Depth == 0 && *I == Target) return I;
612    if (Depth != 0 && *I == '}') Depth--;
613
614    if (*I == '%') {
615      I++;
616      if (I == E) break;
617
618      // Escaped characters get implicitly skipped here.
619
620      // Format specifier.
621      if (!isdigit(*I) && !ispunct(*I)) {
622        for (I++; I != E && !isdigit(*I) && *I != '{'; I++) ;
623        if (I == E) break;
624        if (*I == '{')
625          Depth++;
626      }
627    }
628  }
629  return E;
630}
631
632/// HandleSelectModifier - Handle the integer 'select' modifier.  This is used
633/// like this:  %select{foo|bar|baz}2.  This means that the integer argument
634/// "%2" has a value from 0-2.  If the value is 0, the diagnostic prints 'foo'.
635/// If the value is 1, it prints 'bar'.  If it has the value 2, it prints 'baz'.
636/// This is very useful for certain classes of variant diagnostics.
637static void HandleSelectModifier(const DiagnosticInfo &DInfo, unsigned ValNo,
638                                 const char *Argument, unsigned ArgumentLen,
639                                 llvm::SmallVectorImpl<char> &OutStr) {
640  const char *ArgumentEnd = Argument+ArgumentLen;
641
642  // Skip over 'ValNo' |'s.
643  while (ValNo) {
644    const char *NextVal = ScanFormat(Argument, ArgumentEnd, '|');
645    assert(NextVal != ArgumentEnd && "Value for integer select modifier was"
646           " larger than the number of options in the diagnostic string!");
647    Argument = NextVal+1;  // Skip this string.
648    --ValNo;
649  }
650
651  // Get the end of the value.  This is either the } or the |.
652  const char *EndPtr = ScanFormat(Argument, ArgumentEnd, '|');
653
654  // Recursively format the result of the select clause into the output string.
655  DInfo.FormatDiagnostic(Argument, EndPtr, OutStr);
656}
657
658/// HandleIntegerSModifier - Handle the integer 's' modifier.  This adds the
659/// letter 's' to the string if the value is not 1.  This is used in cases like
660/// this:  "you idiot, you have %4 parameter%s4!".
661static void HandleIntegerSModifier(unsigned ValNo,
662                                   llvm::SmallVectorImpl<char> &OutStr) {
663  if (ValNo != 1)
664    OutStr.push_back('s');
665}
666
667/// HandleOrdinalModifier - Handle the integer 'ord' modifier.  This
668/// prints the ordinal form of the given integer, with 1 corresponding
669/// to the first ordinal.  Currently this is hard-coded to use the
670/// English form.
671static void HandleOrdinalModifier(unsigned ValNo,
672                                  llvm::SmallVectorImpl<char> &OutStr) {
673  assert(ValNo != 0 && "ValNo must be strictly positive!");
674
675  llvm::raw_svector_ostream Out(OutStr);
676
677  // We could use text forms for the first N ordinals, but the numeric
678  // forms are actually nicer in diagnostics because they stand out.
679  Out << ValNo;
680
681  // It is critically important that we do this perfectly for
682  // user-written sequences with over 100 elements.
683  switch (ValNo % 100) {
684  case 11:
685  case 12:
686  case 13:
687    Out << "th"; return;
688  default:
689    switch (ValNo % 10) {
690    case 1: Out << "st"; return;
691    case 2: Out << "nd"; return;
692    case 3: Out << "rd"; return;
693    default: Out << "th"; return;
694    }
695  }
696}
697
698
699/// PluralNumber - Parse an unsigned integer and advance Start.
700static unsigned PluralNumber(const char *&Start, const char *End) {
701  // Programming 101: Parse a decimal number :-)
702  unsigned Val = 0;
703  while (Start != End && *Start >= '0' && *Start <= '9') {
704    Val *= 10;
705    Val += *Start - '0';
706    ++Start;
707  }
708  return Val;
709}
710
711/// TestPluralRange - Test if Val is in the parsed range. Modifies Start.
712static bool TestPluralRange(unsigned Val, const char *&Start, const char *End) {
713  if (*Start != '[') {
714    unsigned Ref = PluralNumber(Start, End);
715    return Ref == Val;
716  }
717
718  ++Start;
719  unsigned Low = PluralNumber(Start, End);
720  assert(*Start == ',' && "Bad plural expression syntax: expected ,");
721  ++Start;
722  unsigned High = PluralNumber(Start, End);
723  assert(*Start == ']' && "Bad plural expression syntax: expected )");
724  ++Start;
725  return Low <= Val && Val <= High;
726}
727
728/// EvalPluralExpr - Actual expression evaluator for HandlePluralModifier.
729static bool EvalPluralExpr(unsigned ValNo, const char *Start, const char *End) {
730  // Empty condition?
731  if (*Start == ':')
732    return true;
733
734  while (1) {
735    char C = *Start;
736    if (C == '%') {
737      // Modulo expression
738      ++Start;
739      unsigned Arg = PluralNumber(Start, End);
740      assert(*Start == '=' && "Bad plural expression syntax: expected =");
741      ++Start;
742      unsigned ValMod = ValNo % Arg;
743      if (TestPluralRange(ValMod, Start, End))
744        return true;
745    } else {
746      assert((C == '[' || (C >= '0' && C <= '9')) &&
747             "Bad plural expression syntax: unexpected character");
748      // Range expression
749      if (TestPluralRange(ValNo, Start, End))
750        return true;
751    }
752
753    // Scan for next or-expr part.
754    Start = std::find(Start, End, ',');
755    if (Start == End)
756      break;
757    ++Start;
758  }
759  return false;
760}
761
762/// HandlePluralModifier - Handle the integer 'plural' modifier. This is used
763/// for complex plural forms, or in languages where all plurals are complex.
764/// The syntax is: %plural{cond1:form1|cond2:form2|:form3}, where condn are
765/// conditions that are tested in order, the form corresponding to the first
766/// that applies being emitted. The empty condition is always true, making the
767/// last form a default case.
768/// Conditions are simple boolean expressions, where n is the number argument.
769/// Here are the rules.
770/// condition  := expression | empty
771/// empty      :=                             -> always true
772/// expression := numeric [',' expression]    -> logical or
773/// numeric    := range                       -> true if n in range
774///             | '%' number '=' range        -> true if n % number in range
775/// range      := number
776///             | '[' number ',' number ']'   -> ranges are inclusive both ends
777///
778/// Here are some examples from the GNU gettext manual written in this form:
779/// English:
780/// {1:form0|:form1}
781/// Latvian:
782/// {0:form2|%100=11,%10=0,%10=[2,9]:form1|:form0}
783/// Gaeilge:
784/// {1:form0|2:form1|:form2}
785/// Romanian:
786/// {1:form0|0,%100=[1,19]:form1|:form2}
787/// Lithuanian:
788/// {%10=0,%100=[10,19]:form2|%10=1:form0|:form1}
789/// Russian (requires repeated form):
790/// {%100=[11,14]:form2|%10=1:form0|%10=[2,4]:form1|:form2}
791/// Slovak
792/// {1:form0|[2,4]:form1|:form2}
793/// Polish (requires repeated form):
794/// {1:form0|%100=[10,20]:form2|%10=[2,4]:form1|:form2}
795static void HandlePluralModifier(unsigned ValNo,
796                                 const char *Argument, unsigned ArgumentLen,
797                                 llvm::SmallVectorImpl<char> &OutStr) {
798  const char *ArgumentEnd = Argument + ArgumentLen;
799  while (1) {
800    assert(Argument < ArgumentEnd && "Plural expression didn't match.");
801    const char *ExprEnd = Argument;
802    while (*ExprEnd != ':') {
803      assert(ExprEnd != ArgumentEnd && "Plural missing expression end");
804      ++ExprEnd;
805    }
806    if (EvalPluralExpr(ValNo, Argument, ExprEnd)) {
807      Argument = ExprEnd + 1;
808      ExprEnd = ScanFormat(Argument, ArgumentEnd, '|');
809      OutStr.append(Argument, ExprEnd);
810      return;
811    }
812    Argument = ScanFormat(Argument, ArgumentEnd - 1, '|') + 1;
813  }
814}
815
816
817/// FormatDiagnostic - Format this diagnostic into a string, substituting the
818/// formal arguments into the %0 slots.  The result is appended onto the Str
819/// array.
820void DiagnosticInfo::
821FormatDiagnostic(llvm::SmallVectorImpl<char> &OutStr) const {
822  const char *DiagStr = getDiags()->getDescription(getID());
823  const char *DiagEnd = DiagStr+strlen(DiagStr);
824
825  FormatDiagnostic(DiagStr, DiagEnd, OutStr);
826}
827
828void DiagnosticInfo::
829FormatDiagnostic(const char *DiagStr, const char *DiagEnd,
830                 llvm::SmallVectorImpl<char> &OutStr) const {
831
832  /// FormattedArgs - Keep track of all of the arguments formatted by
833  /// ConvertArgToString and pass them into subsequent calls to
834  /// ConvertArgToString, allowing the implementation to avoid redundancies in
835  /// obvious cases.
836  llvm::SmallVector<Diagnostic::ArgumentValue, 8> FormattedArgs;
837
838  while (DiagStr != DiagEnd) {
839    if (DiagStr[0] != '%') {
840      // Append non-%0 substrings to Str if we have one.
841      const char *StrEnd = std::find(DiagStr, DiagEnd, '%');
842      OutStr.append(DiagStr, StrEnd);
843      DiagStr = StrEnd;
844      continue;
845    } else if (ispunct(DiagStr[1])) {
846      OutStr.push_back(DiagStr[1]);  // %% -> %.
847      DiagStr += 2;
848      continue;
849    }
850
851    // Skip the %.
852    ++DiagStr;
853
854    // This must be a placeholder for a diagnostic argument.  The format for a
855    // placeholder is one of "%0", "%modifier0", or "%modifier{arguments}0".
856    // The digit is a number from 0-9 indicating which argument this comes from.
857    // The modifier is a string of digits from the set [-a-z]+, arguments is a
858    // brace enclosed string.
859    const char *Modifier = 0, *Argument = 0;
860    unsigned ModifierLen = 0, ArgumentLen = 0;
861
862    // Check to see if we have a modifier.  If so eat it.
863    if (!isdigit(DiagStr[0])) {
864      Modifier = DiagStr;
865      while (DiagStr[0] == '-' ||
866             (DiagStr[0] >= 'a' && DiagStr[0] <= 'z'))
867        ++DiagStr;
868      ModifierLen = DiagStr-Modifier;
869
870      // If we have an argument, get it next.
871      if (DiagStr[0] == '{') {
872        ++DiagStr; // Skip {.
873        Argument = DiagStr;
874
875        DiagStr = ScanFormat(DiagStr, DiagEnd, '}');
876        assert(DiagStr != DiagEnd && "Mismatched {}'s in diagnostic string!");
877        ArgumentLen = DiagStr-Argument;
878        ++DiagStr;  // Skip }.
879      }
880    }
881
882    assert(isdigit(*DiagStr) && "Invalid format for argument in diagnostic");
883    unsigned ArgNo = *DiagStr++ - '0';
884
885    Diagnostic::ArgumentKind Kind = getArgKind(ArgNo);
886
887    switch (Kind) {
888    // ---- STRINGS ----
889    case Diagnostic::ak_std_string: {
890      const std::string &S = getArgStdStr(ArgNo);
891      assert(ModifierLen == 0 && "No modifiers for strings yet");
892      OutStr.append(S.begin(), S.end());
893      break;
894    }
895    case Diagnostic::ak_c_string: {
896      const char *S = getArgCStr(ArgNo);
897      assert(ModifierLen == 0 && "No modifiers for strings yet");
898
899      // Don't crash if get passed a null pointer by accident.
900      if (!S)
901        S = "(null)";
902
903      OutStr.append(S, S + strlen(S));
904      break;
905    }
906    // ---- INTEGERS ----
907    case Diagnostic::ak_sint: {
908      int Val = getArgSInt(ArgNo);
909
910      if (ModifierIs(Modifier, ModifierLen, "select")) {
911        HandleSelectModifier(*this, (unsigned)Val, Argument, ArgumentLen, OutStr);
912      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
913        HandleIntegerSModifier(Val, OutStr);
914      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
915        HandlePluralModifier((unsigned)Val, Argument, ArgumentLen, OutStr);
916      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
917        HandleOrdinalModifier((unsigned)Val, OutStr);
918      } else {
919        assert(ModifierLen == 0 && "Unknown integer modifier");
920        llvm::raw_svector_ostream(OutStr) << Val;
921      }
922      break;
923    }
924    case Diagnostic::ak_uint: {
925      unsigned Val = getArgUInt(ArgNo);
926
927      if (ModifierIs(Modifier, ModifierLen, "select")) {
928        HandleSelectModifier(*this, Val, Argument, ArgumentLen, OutStr);
929      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
930        HandleIntegerSModifier(Val, OutStr);
931      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
932        HandlePluralModifier((unsigned)Val, Argument, ArgumentLen, OutStr);
933      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
934        HandleOrdinalModifier(Val, OutStr);
935      } else {
936        assert(ModifierLen == 0 && "Unknown integer modifier");
937        llvm::raw_svector_ostream(OutStr) << Val;
938      }
939      break;
940    }
941    // ---- NAMES and TYPES ----
942    case Diagnostic::ak_identifierinfo: {
943      const IdentifierInfo *II = getArgIdentifier(ArgNo);
944      assert(ModifierLen == 0 && "No modifiers for strings yet");
945
946      // Don't crash if get passed a null pointer by accident.
947      if (!II) {
948        const char *S = "(null)";
949        OutStr.append(S, S + strlen(S));
950        continue;
951      }
952
953      llvm::raw_svector_ostream(OutStr) << '\'' << II->getName() << '\'';
954      break;
955    }
956    case Diagnostic::ak_qualtype:
957    case Diagnostic::ak_declarationname:
958    case Diagnostic::ak_nameddecl:
959    case Diagnostic::ak_nestednamespec:
960    case Diagnostic::ak_declcontext:
961      getDiags()->ConvertArgToString(Kind, getRawArg(ArgNo),
962                                     Modifier, ModifierLen,
963                                     Argument, ArgumentLen,
964                                     FormattedArgs.data(), FormattedArgs.size(),
965                                     OutStr);
966      break;
967    }
968
969    // Remember this argument info for subsequent formatting operations.  Turn
970    // std::strings into a null terminated string to make it be the same case as
971    // all the other ones.
972    if (Kind != Diagnostic::ak_std_string)
973      FormattedArgs.push_back(std::make_pair(Kind, getRawArg(ArgNo)));
974    else
975      FormattedArgs.push_back(std::make_pair(Diagnostic::ak_c_string,
976                                        (intptr_t)getArgStdStr(ArgNo).c_str()));
977
978  }
979}
980
981StoredDiagnostic::StoredDiagnostic() { }
982
983StoredDiagnostic::StoredDiagnostic(Diagnostic::Level Level,
984                                   llvm::StringRef Message)
985  : Level(Level), Loc(), Message(Message) { }
986
987StoredDiagnostic::StoredDiagnostic(Diagnostic::Level Level,
988                                   const DiagnosticInfo &Info)
989  : Level(Level), Loc(Info.getLocation())
990{
991  llvm::SmallString<64> Message;
992  Info.FormatDiagnostic(Message);
993  this->Message.assign(Message.begin(), Message.end());
994
995  Ranges.reserve(Info.getNumRanges());
996  for (unsigned I = 0, N = Info.getNumRanges(); I != N; ++I)
997    Ranges.push_back(Info.getRange(I));
998
999  FixIts.reserve(Info.getNumFixItHints());
1000  for (unsigned I = 0, N = Info.getNumFixItHints(); I != N; ++I)
1001    FixIts.push_back(Info.getFixItHint(I));
1002}
1003
1004StoredDiagnostic::~StoredDiagnostic() { }
1005
1006static void WriteUnsigned(llvm::raw_ostream &OS, unsigned Value) {
1007  OS.write((const char *)&Value, sizeof(unsigned));
1008}
1009
1010static void WriteString(llvm::raw_ostream &OS, llvm::StringRef String) {
1011  WriteUnsigned(OS, String.size());
1012  OS.write(String.data(), String.size());
1013}
1014
1015static void WriteSourceLocation(llvm::raw_ostream &OS,
1016                                SourceManager *SM,
1017                                SourceLocation Location) {
1018  if (!SM || Location.isInvalid()) {
1019    // If we don't have a source manager or this location is invalid,
1020    // just write an invalid location.
1021    WriteUnsigned(OS, 0);
1022    WriteUnsigned(OS, 0);
1023    WriteUnsigned(OS, 0);
1024    return;
1025  }
1026
1027  Location = SM->getInstantiationLoc(Location);
1028  std::pair<FileID, unsigned> Decomposed = SM->getDecomposedLoc(Location);
1029
1030  WriteString(OS, SM->getFileEntryForID(Decomposed.first)->getName());
1031  WriteUnsigned(OS, SM->getLineNumber(Decomposed.first, Decomposed.second));
1032  WriteUnsigned(OS, SM->getColumnNumber(Decomposed.first, Decomposed.second));
1033}
1034
1035void StoredDiagnostic::Serialize(llvm::raw_ostream &OS) const {
1036  SourceManager *SM = 0;
1037  if (getLocation().isValid())
1038    SM = &const_cast<SourceManager &>(getLocation().getManager());
1039
1040  // Write a short header to help identify diagnostics.
1041  OS << (char)0x06 << (char)0x07;
1042
1043  // Write the diagnostic level and location.
1044  WriteUnsigned(OS, (unsigned)Level);
1045  WriteSourceLocation(OS, SM, getLocation());
1046
1047  // Write the diagnostic message.
1048  llvm::SmallString<64> Message;
1049  WriteString(OS, getMessage());
1050
1051  // Count the number of ranges that don't point into macros, since
1052  // only simple file ranges serialize well.
1053  unsigned NumNonMacroRanges = 0;
1054  for (range_iterator R = range_begin(), REnd = range_end(); R != REnd; ++R) {
1055    if (R->getBegin().isMacroID() || R->getEnd().isMacroID())
1056      continue;
1057
1058    ++NumNonMacroRanges;
1059  }
1060
1061  // Write the ranges.
1062  WriteUnsigned(OS, NumNonMacroRanges);
1063  if (NumNonMacroRanges) {
1064    for (range_iterator R = range_begin(), REnd = range_end(); R != REnd; ++R) {
1065      if (R->getBegin().isMacroID() || R->getEnd().isMacroID())
1066        continue;
1067
1068      WriteSourceLocation(OS, SM, R->getBegin());
1069      WriteSourceLocation(OS, SM, R->getEnd());
1070    }
1071  }
1072
1073  // Determine if all of the fix-its involve rewrites with simple file
1074  // locations (not in macro instantiations). If so, we can write
1075  // fix-it information.
1076  unsigned NumFixIts = 0;
1077  for (fixit_iterator F = fixit_begin(), FEnd = fixit_end(); F != FEnd; ++F) {
1078    if (F->RemoveRange.isValid() &&
1079        (F->RemoveRange.getBegin().isMacroID() ||
1080         F->RemoveRange.getEnd().isMacroID())) {
1081      NumFixIts = 0;
1082      break;
1083    }
1084
1085    if (F->InsertionLoc.isValid() && F->InsertionLoc.isMacroID()) {
1086      NumFixIts = 0;
1087      break;
1088    }
1089
1090    ++NumFixIts;
1091  }
1092
1093  // Write the fix-its.
1094  WriteUnsigned(OS, NumFixIts);
1095  for (fixit_iterator F = fixit_begin(), FEnd = fixit_end(); F != FEnd; ++F) {
1096    WriteSourceLocation(OS, SM, F->RemoveRange.getBegin());
1097    WriteSourceLocation(OS, SM, F->RemoveRange.getEnd());
1098    WriteSourceLocation(OS, SM, F->InsertionLoc);
1099    WriteString(OS, F->CodeToInsert);
1100  }
1101}
1102
1103static bool ReadUnsigned(const char *&Memory, const char *MemoryEnd,
1104                         unsigned &Value) {
1105  if (Memory + sizeof(unsigned) > MemoryEnd)
1106    return true;
1107
1108  memmove(&Value, Memory, sizeof(unsigned));
1109  Memory += sizeof(unsigned);
1110  return false;
1111}
1112
1113static bool ReadSourceLocation(FileManager &FM, SourceManager &SM,
1114                               const char *&Memory, const char *MemoryEnd,
1115                               SourceLocation &Location) {
1116  // Read the filename.
1117  unsigned FileNameLen = 0;
1118  if (ReadUnsigned(Memory, MemoryEnd, FileNameLen) ||
1119      Memory + FileNameLen > MemoryEnd)
1120    return true;
1121
1122  llvm::StringRef FileName(Memory, FileNameLen);
1123  Memory += FileNameLen;
1124
1125  // Read the line, column.
1126  unsigned Line = 0, Column = 0;
1127  if (ReadUnsigned(Memory, MemoryEnd, Line) ||
1128      ReadUnsigned(Memory, MemoryEnd, Column))
1129    return true;
1130
1131  if (FileName.empty()) {
1132    Location = SourceLocation();
1133    return false;
1134  }
1135
1136  const FileEntry *File = FM.getFile(FileName);
1137  if (!File)
1138    return true;
1139
1140  // Make sure that this file has an entry in the source manager.
1141  if (!SM.hasFileInfo(File))
1142    SM.createFileID(File, SourceLocation(), SrcMgr::C_User);
1143
1144  Location = SM.getLocation(File, Line, Column);
1145  return false;
1146}
1147
1148StoredDiagnostic
1149StoredDiagnostic::Deserialize(FileManager &FM, SourceManager &SM,
1150                              const char *&Memory, const char *MemoryEnd) {
1151  while (true) {
1152    if (Memory == MemoryEnd)
1153      return StoredDiagnostic();
1154
1155    if (*Memory != 0x06) {
1156      ++Memory;
1157      continue;
1158    }
1159
1160    ++Memory;
1161    if (Memory == MemoryEnd)
1162      return StoredDiagnostic();
1163
1164    if (*Memory != 0x07) {
1165      ++Memory;
1166      continue;
1167    }
1168
1169    // We found the header. We're done.
1170    ++Memory;
1171    break;
1172  }
1173
1174  // Read the severity level.
1175  unsigned Level = 0;
1176  if (ReadUnsigned(Memory, MemoryEnd, Level) || Level > Diagnostic::Fatal)
1177    return StoredDiagnostic();
1178
1179  // Read the source location.
1180  SourceLocation Location;
1181  if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, Location))
1182    return StoredDiagnostic();
1183
1184  // Read the diagnostic text.
1185  if (Memory == MemoryEnd)
1186    return StoredDiagnostic();
1187
1188  unsigned MessageLen = 0;
1189  if (ReadUnsigned(Memory, MemoryEnd, MessageLen) ||
1190      Memory + MessageLen > MemoryEnd)
1191    return StoredDiagnostic();
1192
1193  llvm::StringRef Message(Memory, MessageLen);
1194  Memory += MessageLen;
1195
1196
1197  // At this point, we have enough information to form a diagnostic. Do so.
1198  StoredDiagnostic Diag;
1199  Diag.Level = (Diagnostic::Level)Level;
1200  Diag.Loc = FullSourceLoc(Location, SM);
1201  Diag.Message = Message;
1202  if (Memory == MemoryEnd)
1203    return Diag;
1204
1205  // Read the source ranges.
1206  unsigned NumSourceRanges = 0;
1207  if (ReadUnsigned(Memory, MemoryEnd, NumSourceRanges))
1208    return Diag;
1209  for (unsigned I = 0; I != NumSourceRanges; ++I) {
1210    SourceLocation Begin, End;
1211    if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, Begin) ||
1212        ReadSourceLocation(FM, SM, Memory, MemoryEnd, End))
1213      return Diag;
1214
1215    Diag.Ranges.push_back(SourceRange(Begin, End));
1216  }
1217
1218  // Read the fix-it hints.
1219  unsigned NumFixIts = 0;
1220  if (ReadUnsigned(Memory, MemoryEnd, NumFixIts))
1221    return Diag;
1222  for (unsigned I = 0; I != NumFixIts; ++I) {
1223    SourceLocation RemoveBegin, RemoveEnd, InsertionLoc;
1224    unsigned InsertLen = 0;
1225    if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, RemoveBegin) ||
1226        ReadSourceLocation(FM, SM, Memory, MemoryEnd, RemoveEnd) ||
1227        ReadSourceLocation(FM, SM, Memory, MemoryEnd, InsertionLoc) ||
1228        ReadUnsigned(Memory, MemoryEnd, InsertLen) ||
1229        Memory + InsertLen > MemoryEnd) {
1230      Diag.FixIts.clear();
1231      return Diag;
1232    }
1233
1234    FixItHint Hint;
1235    Hint.RemoveRange = SourceRange(RemoveBegin, RemoveEnd);
1236    Hint.InsertionLoc = InsertionLoc;
1237    Hint.CodeToInsert.assign(Memory, Memory + InsertLen);
1238    Memory += InsertLen;
1239    Diag.FixIts.push_back(Hint);
1240  }
1241
1242  return Diag;
1243}
1244
1245/// IncludeInDiagnosticCounts - This method (whose default implementation
1246///  returns true) indicates whether the diagnostics handled by this
1247///  DiagnosticClient should be included in the number of diagnostics
1248///  reported by Diagnostic.
1249bool DiagnosticClient::IncludeInDiagnosticCounts() const { return true; }
1250
1251PartialDiagnostic::StorageAllocator::StorageAllocator() {
1252  for (unsigned I = 0; I != NumCached; ++I)
1253    FreeList[I] = Cached + I;
1254  NumFreeListEntries = NumCached;
1255}
1256
1257PartialDiagnostic::StorageAllocator::~StorageAllocator() {
1258  assert(NumFreeListEntries == NumCached && "A partial is on the lamb");
1259}
1260