Diagnostic.cpp revision 4aa8f2bce0f498152d624f748712a991adc23fdd 
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/IdentifierTable.h"
16#include "clang/Basic/PartialDiagnostic.h"
17#include "llvm/ADT/SmallVector.h"
18#include "llvm/Support/raw_ostream.h"
19#include "llvm/Support/CrashRecoveryContext.h"
20
21using namespace clang;
22
23static void DummyArgToStringFn(DiagnosticsEngine::ArgumentKind AK, intptr_t QT,
24                               const char *Modifier, unsigned ML,
25                               const char *Argument, unsigned ArgLen,
26                               const DiagnosticsEngine::ArgumentValue *PrevArgs,
27                               unsigned NumPrevArgs,
28                               SmallVectorImpl<char> &Output,
29                               void *Cookie,
30                               SmallVectorImpl<intptr_t> &QualTypeVals) {
31  const char *Str = "<can't format argument>";
32  Output.append(Str, Str+strlen(Str));
33}
34
35
36DiagnosticsEngine::DiagnosticsEngine(
37                       const llvm::IntrusiveRefCntPtr<DiagnosticIDs> &diags,
38                       DiagnosticConsumer *client, bool ShouldOwnClient)
39  : Diags(diags), Client(client), OwnsDiagClient(ShouldOwnClient),
40    SourceMgr(0) {
41  ArgToStringFn = DummyArgToStringFn;
42  ArgToStringCookie = 0;
43
44  AllExtensionsSilenced = 0;
45  IgnoreAllWarnings = false;
46  WarningsAsErrors = false;
47  EnableAllWarnings = false;
48  ErrorsAsFatal = false;
49  SuppressSystemWarnings = false;
50  SuppressAllDiagnostics = false;
51  ShowOverloads = Ovl_All;
52  ExtBehavior = Ext_Ignore;
53
54  ErrorLimit = 0;
55  TemplateBacktraceLimit = 0;
56
57  Reset();
58}
59
60DiagnosticsEngine::~DiagnosticsEngine() {
61  if (OwnsDiagClient)
62    delete Client;
63}
64
65void DiagnosticsEngine::setClient(DiagnosticConsumer *client,
66                                  bool ShouldOwnClient) {
67  if (OwnsDiagClient && Client)
68    delete Client;
69
70  Client = client;
71  OwnsDiagClient = ShouldOwnClient;
72}
73
74void DiagnosticsEngine::pushMappings(SourceLocation Loc) {
75  DiagStateOnPushStack.push_back(GetCurDiagState());
76}
77
78bool DiagnosticsEngine::popMappings(SourceLocation Loc) {
79  if (DiagStateOnPushStack.empty())
80    return false;
81
82  if (DiagStateOnPushStack.back() != GetCurDiagState()) {
83    // State changed at some point between push/pop.
84    PushDiagStatePoint(DiagStateOnPushStack.back(), Loc);
85  }
86  DiagStateOnPushStack.pop_back();
87  return true;
88}
89
90void DiagnosticsEngine::Reset() {
91  ErrorOccurred = false;
92  FatalErrorOccurred = false;
93  UnrecoverableErrorOccurred = false;
94
95  NumWarnings = 0;
96  NumErrors = 0;
97  NumErrorsSuppressed = 0;
98  TrapNumErrorsOccurred = 0;
99  TrapNumUnrecoverableErrorsOccurred = 0;
100
101  CurDiagID = ~0U;
102  // Set LastDiagLevel to an "unset" state. If we set it to 'Ignored', notes
103  // using a DiagnosticsEngine associated to a translation unit that follow
104  // diagnostics from a DiagnosticsEngine associated to anoter t.u. will not be
105  // displayed.
106  LastDiagLevel = (DiagnosticIDs::Level)-1;
107  DelayedDiagID = 0;
108
109  // Clear state related to #pragma diagnostic.
110  DiagStates.clear();
111  DiagStatePoints.clear();
112  DiagStateOnPushStack.clear();
113
114  // Create a DiagState and DiagStatePoint representing diagnostic changes
115  // through command-line.
116  DiagStates.push_back(DiagState());
117  PushDiagStatePoint(&DiagStates.back(), SourceLocation());
118}
119
120void DiagnosticsEngine::SetDelayedDiagnostic(unsigned DiagID, StringRef Arg1,
121                                      StringRef Arg2) {
122  if (DelayedDiagID)
123    return;
124
125  DelayedDiagID = DiagID;
126  DelayedDiagArg1 = Arg1.str();
127  DelayedDiagArg2 = Arg2.str();
128}
129
130void DiagnosticsEngine::ReportDelayed() {
131  Report(DelayedDiagID) << DelayedDiagArg1 << DelayedDiagArg2;
132  DelayedDiagID = 0;
133  DelayedDiagArg1.clear();
134  DelayedDiagArg2.clear();
135}
136
137DiagnosticsEngine::DiagStatePointsTy::iterator
138DiagnosticsEngine::GetDiagStatePointForLoc(SourceLocation L) const {
139  assert(!DiagStatePoints.empty());
140  assert(DiagStatePoints.front().Loc.isInvalid() &&
141         "Should have created a DiagStatePoint for command-line");
142
143  FullSourceLoc Loc(L, *SourceMgr);
144  if (Loc.isInvalid())
145    return DiagStatePoints.end() - 1;
146
147  DiagStatePointsTy::iterator Pos = DiagStatePoints.end();
148  FullSourceLoc LastStateChangePos = DiagStatePoints.back().Loc;
149  if (LastStateChangePos.isValid() &&
150      Loc.isBeforeInTranslationUnitThan(LastStateChangePos))
151    Pos = std::upper_bound(DiagStatePoints.begin(), DiagStatePoints.end(),
152                           DiagStatePoint(0, Loc));
153  --Pos;
154  return Pos;
155}
156
157/// \brief This allows the client to specify that certain
158/// warnings are ignored.  Notes can never be mapped, errors can only be
159/// mapped to fatal, and WARNINGs and EXTENSIONs can be mapped arbitrarily.
160///
161/// \param The source location that this change of diagnostic state should
162/// take affect. It can be null if we are setting the latest state.
163void DiagnosticsEngine::setDiagnosticMapping(diag::kind Diag, diag::Mapping Map,
164                                      SourceLocation L) {
165  assert(Diag < diag::DIAG_UPPER_LIMIT &&
166         "Can only map builtin diagnostics");
167  assert((Diags->isBuiltinWarningOrExtension(Diag) ||
168          (Map == diag::MAP_FATAL || Map == diag::MAP_ERROR)) &&
169         "Cannot map errors into warnings!");
170  assert(!DiagStatePoints.empty());
171
172  bool isPragma = L.isValid();
173  FullSourceLoc Loc(L, *SourceMgr);
174  FullSourceLoc LastStateChangePos = DiagStatePoints.back().Loc;
175
176  // Common case; setting all the diagnostics of a group in one place.
177  if (Loc.isInvalid() || Loc == LastStateChangePos) {
178    setDiagnosticMappingInternal(Diag, Map, GetCurDiagState(), true, isPragma);
179    return;
180  }
181
182  // Another common case; modifying diagnostic state in a source location
183  // after the previous one.
184  if ((Loc.isValid() && LastStateChangePos.isInvalid()) ||
185      LastStateChangePos.isBeforeInTranslationUnitThan(Loc)) {
186    // A diagnostic pragma occurred, create a new DiagState initialized with
187    // the current one and a new DiagStatePoint to record at which location
188    // the new state became active.
189    DiagStates.push_back(*GetCurDiagState());
190    PushDiagStatePoint(&DiagStates.back(), Loc);
191    setDiagnosticMappingInternal(Diag, Map, GetCurDiagState(), true, isPragma);
192    return;
193  }
194
195  // We allow setting the diagnostic state in random source order for
196  // completeness but it should not be actually happening in normal practice.
197
198  DiagStatePointsTy::iterator Pos = GetDiagStatePointForLoc(Loc);
199  assert(Pos != DiagStatePoints.end());
200
201  // Update all diagnostic states that are active after the given location.
202  for (DiagStatePointsTy::iterator
203         I = Pos+1, E = DiagStatePoints.end(); I != E; ++I) {
204    setDiagnosticMappingInternal(Diag, Map, I->State, true, isPragma);
205  }
206
207  // If the location corresponds to an existing point, just update its state.
208  if (Pos->Loc == Loc) {
209    setDiagnosticMappingInternal(Diag, Map, Pos->State, true, isPragma);
210    return;
211  }
212
213  // Create a new state/point and fit it into the vector of DiagStatePoints
214  // so that the vector is always ordered according to location.
215  Pos->Loc.isBeforeInTranslationUnitThan(Loc);
216  DiagStates.push_back(*Pos->State);
217  DiagState *NewState = &DiagStates.back();
218  setDiagnosticMappingInternal(Diag, Map, NewState, true, isPragma);
219  DiagStatePoints.insert(Pos+1, DiagStatePoint(NewState,
220                                               FullSourceLoc(Loc, *SourceMgr)));
221}
222
223bool DiagnosticsEngine::setDiagnosticGroupWarningAsError(StringRef Group,
224                                                         bool Enabled) {
225  diag::Mapping Map = Enabled ? diag::MAP_ERROR : diag::MAP_WARNING_NO_WERROR;
226  return setDiagnosticGroupMapping(Group, Map);
227}
228
229bool DiagnosticsEngine::setDiagnosticGroupErrorAsFatal(StringRef Group,
230                                                       bool Enabled) {
231  diag::Mapping Map = Enabled ? diag::MAP_FATAL : diag::MAP_ERROR_NO_WFATAL;
232  return setDiagnosticGroupMapping(Group, Map);
233}
234
235void DiagnosticsEngine::Report(const StoredDiagnostic &storedDiag) {
236  assert(CurDiagID == ~0U && "Multiple diagnostics in flight at once!");
237
238  CurDiagLoc = storedDiag.getLocation();
239  CurDiagID = storedDiag.getID();
240  NumDiagArgs = 0;
241
242  NumDiagRanges = storedDiag.range_size();
243  assert(NumDiagRanges < sizeof(DiagRanges)/sizeof(DiagRanges[0]) &&
244         "Too many arguments to diagnostic!");
245  unsigned i = 0;
246  for (StoredDiagnostic::range_iterator
247         RI = storedDiag.range_begin(),
248         RE = storedDiag.range_end(); RI != RE; ++RI)
249    DiagRanges[i++] = *RI;
250
251  NumFixItHints = storedDiag.fixit_size();
252  assert(NumFixItHints < DiagnosticsEngine::MaxFixItHints &&
253      "Too many fix-it hints!");
254  i = 0;
255  for (StoredDiagnostic::fixit_iterator
256         FI = storedDiag.fixit_begin(),
257         FE = storedDiag.fixit_end(); FI != FE; ++FI)
258    FixItHints[i++] = *FI;
259
260  assert(Client && "DiagnosticConsumer not set!");
261  Level DiagLevel = storedDiag.getLevel();
262  Diagnostic Info(this, storedDiag.getMessage());
263  Client->HandleDiagnostic(DiagLevel, Info);
264  if (Client->IncludeInDiagnosticCounts()) {
265    if (DiagLevel == DiagnosticsEngine::Warning)
266      ++NumWarnings;
267  }
268
269  CurDiagID = ~0U;
270}
271
272void DiagnosticBuilder::FlushCounts() {
273  DiagObj->NumDiagArgs = NumArgs;
274  DiagObj->NumDiagRanges = NumRanges;
275  DiagObj->NumFixItHints = NumFixItHints;
276}
277
278bool DiagnosticBuilder::Emit() {
279  // If DiagObj is null, then its soul was stolen by the copy ctor
280  // or the user called Emit().
281  if (DiagObj == 0) return false;
282
283  // When emitting diagnostics, we set the final argument count into
284  // the DiagnosticsEngine object.
285  FlushCounts();
286
287  // Process the diagnostic, sending the accumulated information to the
288  // DiagnosticConsumer.
289  bool Emitted = DiagObj->ProcessDiag();
290
291  // Clear out the current diagnostic object.
292  unsigned DiagID = DiagObj->CurDiagID;
293  DiagObj->Clear();
294
295  // If there was a delayed diagnostic, emit it now.
296  if (DiagObj->DelayedDiagID && DiagObj->DelayedDiagID != DiagID)
297    DiagObj->ReportDelayed();
298
299  // This diagnostic is dead.
300  DiagObj = 0;
301
302  return Emitted;
303}
304
305
306DiagnosticConsumer::~DiagnosticConsumer() {}
307
308void DiagnosticConsumer::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
309                                        const Diagnostic &Info) {
310  if (!IncludeInDiagnosticCounts())
311    return;
312
313  if (DiagLevel == DiagnosticsEngine::Warning)
314    ++NumWarnings;
315  else if (DiagLevel >= DiagnosticsEngine::Error)
316    ++NumErrors;
317}
318
319/// ModifierIs - Return true if the specified modifier matches specified string.
320template <std::size_t StrLen>
321static bool ModifierIs(const char *Modifier, unsigned ModifierLen,
322                       const char (&Str)[StrLen]) {
323  return StrLen-1 == ModifierLen && !memcmp(Modifier, Str, StrLen-1);
324}
325
326/// ScanForward - Scans forward, looking for the given character, skipping
327/// nested clauses and escaped characters.
328static const char *ScanFormat(const char *I, const char *E, char Target) {
329  unsigned Depth = 0;
330
331  for ( ; I != E; ++I) {
332    if (Depth == 0 && *I == Target) return I;
333    if (Depth != 0 && *I == '}') Depth--;
334
335    if (*I == '%') {
336      I++;
337      if (I == E) break;
338
339      // Escaped characters get implicitly skipped here.
340
341      // Format specifier.
342      if (!isdigit(*I) && !ispunct(*I)) {
343        for (I++; I != E && !isdigit(*I) && *I != '{'; I++) ;
344        if (I == E) break;
345        if (*I == '{')
346          Depth++;
347      }
348    }
349  }
350  return E;
351}
352
353/// HandleSelectModifier - Handle the integer 'select' modifier.  This is used
354/// like this:  %select{foo|bar|baz}2.  This means that the integer argument
355/// "%2" has a value from 0-2.  If the value is 0, the diagnostic prints 'foo'.
356/// If the value is 1, it prints 'bar'.  If it has the value 2, it prints 'baz'.
357/// This is very useful for certain classes of variant diagnostics.
358static void HandleSelectModifier(const Diagnostic &DInfo, unsigned ValNo,
359                                 const char *Argument, unsigned ArgumentLen,
360                                 SmallVectorImpl<char> &OutStr) {
361  const char *ArgumentEnd = Argument+ArgumentLen;
362
363  // Skip over 'ValNo' |'s.
364  while (ValNo) {
365    const char *NextVal = ScanFormat(Argument, ArgumentEnd, '|');
366    assert(NextVal != ArgumentEnd && "Value for integer select modifier was"
367           " larger than the number of options in the diagnostic string!");
368    Argument = NextVal+1;  // Skip this string.
369    --ValNo;
370  }
371
372  // Get the end of the value.  This is either the } or the |.
373  const char *EndPtr = ScanFormat(Argument, ArgumentEnd, '|');
374
375  // Recursively format the result of the select clause into the output string.
376  DInfo.FormatDiagnostic(Argument, EndPtr, OutStr);
377}
378
379/// HandleIntegerSModifier - Handle the integer 's' modifier.  This adds the
380/// letter 's' to the string if the value is not 1.  This is used in cases like
381/// this:  "you idiot, you have %4 parameter%s4!".
382static void HandleIntegerSModifier(unsigned ValNo,
383                                   SmallVectorImpl<char> &OutStr) {
384  if (ValNo != 1)
385    OutStr.push_back('s');
386}
387
388/// HandleOrdinalModifier - Handle the integer 'ord' modifier.  This
389/// prints the ordinal form of the given integer, with 1 corresponding
390/// to the first ordinal.  Currently this is hard-coded to use the
391/// English form.
392static void HandleOrdinalModifier(unsigned ValNo,
393                                  SmallVectorImpl<char> &OutStr) {
394  assert(ValNo != 0 && "ValNo must be strictly positive!");
395
396  llvm::raw_svector_ostream Out(OutStr);
397
398  // We could use text forms for the first N ordinals, but the numeric
399  // forms are actually nicer in diagnostics because they stand out.
400  Out << ValNo;
401
402  // It is critically important that we do this perfectly for
403  // user-written sequences with over 100 elements.
404  switch (ValNo % 100) {
405  case 11:
406  case 12:
407  case 13:
408    Out << "th"; return;
409  default:
410    switch (ValNo % 10) {
411    case 1: Out << "st"; return;
412    case 2: Out << "nd"; return;
413    case 3: Out << "rd"; return;
414    default: Out << "th"; return;
415    }
416  }
417}
418
419
420/// PluralNumber - Parse an unsigned integer and advance Start.
421static unsigned PluralNumber(const char *&Start, const char *End) {
422  // Programming 101: Parse a decimal number :-)
423  unsigned Val = 0;
424  while (Start != End && *Start >= '0' && *Start <= '9') {
425    Val *= 10;
426    Val += *Start - '0';
427    ++Start;
428  }
429  return Val;
430}
431
432/// TestPluralRange - Test if Val is in the parsed range. Modifies Start.
433static bool TestPluralRange(unsigned Val, const char *&Start, const char *End) {
434  if (*Start != '[') {
435    unsigned Ref = PluralNumber(Start, End);
436    return Ref == Val;
437  }
438
439  ++Start;
440  unsigned Low = PluralNumber(Start, End);
441  assert(*Start == ',' && "Bad plural expression syntax: expected ,");
442  ++Start;
443  unsigned High = PluralNumber(Start, End);
444  assert(*Start == ']' && "Bad plural expression syntax: expected )");
445  ++Start;
446  return Low <= Val && Val <= High;
447}
448
449/// EvalPluralExpr - Actual expression evaluator for HandlePluralModifier.
450static bool EvalPluralExpr(unsigned ValNo, const char *Start, const char *End) {
451  // Empty condition?
452  if (*Start == ':')
453    return true;
454
455  while (1) {
456    char C = *Start;
457    if (C == '%') {
458      // Modulo expression
459      ++Start;
460      unsigned Arg = PluralNumber(Start, End);
461      assert(*Start == '=' && "Bad plural expression syntax: expected =");
462      ++Start;
463      unsigned ValMod = ValNo % Arg;
464      if (TestPluralRange(ValMod, Start, End))
465        return true;
466    } else {
467      assert((C == '[' || (C >= '0' && C <= '9')) &&
468             "Bad plural expression syntax: unexpected character");
469      // Range expression
470      if (TestPluralRange(ValNo, Start, End))
471        return true;
472    }
473
474    // Scan for next or-expr part.
475    Start = std::find(Start, End, ',');
476    if (Start == End)
477      break;
478    ++Start;
479  }
480  return false;
481}
482
483/// HandlePluralModifier - Handle the integer 'plural' modifier. This is used
484/// for complex plural forms, or in languages where all plurals are complex.
485/// The syntax is: %plural{cond1:form1|cond2:form2|:form3}, where condn are
486/// conditions that are tested in order, the form corresponding to the first
487/// that applies being emitted. The empty condition is always true, making the
488/// last form a default case.
489/// Conditions are simple boolean expressions, where n is the number argument.
490/// Here are the rules.
491/// condition  := expression | empty
492/// empty      :=                             -> always true
493/// expression := numeric [',' expression]    -> logical or
494/// numeric    := range                       -> true if n in range
495///             | '%' number '=' range        -> true if n % number in range
496/// range      := number
497///             | '[' number ',' number ']'   -> ranges are inclusive both ends
498///
499/// Here are some examples from the GNU gettext manual written in this form:
500/// English:
501/// {1:form0|:form1}
502/// Latvian:
503/// {0:form2|%100=11,%10=0,%10=[2,9]:form1|:form0}
504/// Gaeilge:
505/// {1:form0|2:form1|:form2}
506/// Romanian:
507/// {1:form0|0,%100=[1,19]:form1|:form2}
508/// Lithuanian:
509/// {%10=0,%100=[10,19]:form2|%10=1:form0|:form1}
510/// Russian (requires repeated form):
511/// {%100=[11,14]:form2|%10=1:form0|%10=[2,4]:form1|:form2}
512/// Slovak
513/// {1:form0|[2,4]:form1|:form2}
514/// Polish (requires repeated form):
515/// {1:form0|%100=[10,20]:form2|%10=[2,4]:form1|:form2}
516static void HandlePluralModifier(const Diagnostic &DInfo, unsigned ValNo,
517                                 const char *Argument, unsigned ArgumentLen,
518                                 SmallVectorImpl<char> &OutStr) {
519  const char *ArgumentEnd = Argument + ArgumentLen;
520  while (1) {
521    assert(Argument < ArgumentEnd && "Plural expression didn't match.");
522    const char *ExprEnd = Argument;
523    while (*ExprEnd != ':') {
524      assert(ExprEnd != ArgumentEnd && "Plural missing expression end");
525      ++ExprEnd;
526    }
527    if (EvalPluralExpr(ValNo, Argument, ExprEnd)) {
528      Argument = ExprEnd + 1;
529      ExprEnd = ScanFormat(Argument, ArgumentEnd, '|');
530
531      // Recursively format the result of the plural clause into the
532      // output string.
533      DInfo.FormatDiagnostic(Argument, ExprEnd, OutStr);
534      return;
535    }
536    Argument = ScanFormat(Argument, ArgumentEnd - 1, '|') + 1;
537  }
538}
539
540
541/// FormatDiagnostic - Format this diagnostic into a string, substituting the
542/// formal arguments into the %0 slots.  The result is appended onto the Str
543/// array.
544void Diagnostic::
545FormatDiagnostic(SmallVectorImpl<char> &OutStr) const {
546  if (!StoredDiagMessage.empty()) {
547    OutStr.append(StoredDiagMessage.begin(), StoredDiagMessage.end());
548    return;
549  }
550
551  StringRef Diag =
552    getDiags()->getDiagnosticIDs()->getDescription(getID());
553
554  FormatDiagnostic(Diag.begin(), Diag.end(), OutStr);
555}
556
557void Diagnostic::
558FormatDiagnostic(const char *DiagStr, const char *DiagEnd,
559                 SmallVectorImpl<char> &OutStr) const {
560
561  /// FormattedArgs - Keep track of all of the arguments formatted by
562  /// ConvertArgToString and pass them into subsequent calls to
563  /// ConvertArgToString, allowing the implementation to avoid redundancies in
564  /// obvious cases.
565  SmallVector<DiagnosticsEngine::ArgumentValue, 8> FormattedArgs;
566
567  /// QualTypeVals - Pass a vector of arrays so that QualType names can be
568  /// compared to see if more information is needed to be printed.
569  SmallVector<intptr_t, 2> QualTypeVals;
570  for (unsigned i = 0, e = getNumArgs(); i < e; ++i)
571    if (getArgKind(i) == DiagnosticsEngine::ak_qualtype)
572      QualTypeVals.push_back(getRawArg(i));
573
574  while (DiagStr != DiagEnd) {
575    if (DiagStr[0] != '%') {
576      // Append non-%0 substrings to Str if we have one.
577      const char *StrEnd = std::find(DiagStr, DiagEnd, '%');
578      OutStr.append(DiagStr, StrEnd);
579      DiagStr = StrEnd;
580      continue;
581    } else if (ispunct(DiagStr[1])) {
582      OutStr.push_back(DiagStr[1]);  // %% -> %.
583      DiagStr += 2;
584      continue;
585    }
586
587    // Skip the %.
588    ++DiagStr;
589
590    // This must be a placeholder for a diagnostic argument.  The format for a
591    // placeholder is one of "%0", "%modifier0", or "%modifier{arguments}0".
592    // The digit is a number from 0-9 indicating which argument this comes from.
593    // The modifier is a string of digits from the set [-a-z]+, arguments is a
594    // brace enclosed string.
595    const char *Modifier = 0, *Argument = 0;
596    unsigned ModifierLen = 0, ArgumentLen = 0;
597
598    // Check to see if we have a modifier.  If so eat it.
599    if (!isdigit(DiagStr[0])) {
600      Modifier = DiagStr;
601      while (DiagStr[0] == '-' ||
602             (DiagStr[0] >= 'a' && DiagStr[0] <= 'z'))
603        ++DiagStr;
604      ModifierLen = DiagStr-Modifier;
605
606      // If we have an argument, get it next.
607      if (DiagStr[0] == '{') {
608        ++DiagStr; // Skip {.
609        Argument = DiagStr;
610
611        DiagStr = ScanFormat(DiagStr, DiagEnd, '}');
612        assert(DiagStr != DiagEnd && "Mismatched {}'s in diagnostic string!");
613        ArgumentLen = DiagStr-Argument;
614        ++DiagStr;  // Skip }.
615      }
616    }
617
618    assert(isdigit(*DiagStr) && "Invalid format for argument in diagnostic");
619    unsigned ArgNo = *DiagStr++ - '0';
620
621    DiagnosticsEngine::ArgumentKind Kind = getArgKind(ArgNo);
622
623    switch (Kind) {
624    // ---- STRINGS ----
625    case DiagnosticsEngine::ak_std_string: {
626      const std::string &S = getArgStdStr(ArgNo);
627      assert(ModifierLen == 0 && "No modifiers for strings yet");
628      OutStr.append(S.begin(), S.end());
629      break;
630    }
631    case DiagnosticsEngine::ak_c_string: {
632      const char *S = getArgCStr(ArgNo);
633      assert(ModifierLen == 0 && "No modifiers for strings yet");
634
635      // Don't crash if get passed a null pointer by accident.
636      if (!S)
637        S = "(null)";
638
639      OutStr.append(S, S + strlen(S));
640      break;
641    }
642    // ---- INTEGERS ----
643    case DiagnosticsEngine::ak_sint: {
644      int Val = getArgSInt(ArgNo);
645
646      if (ModifierIs(Modifier, ModifierLen, "select")) {
647        HandleSelectModifier(*this, (unsigned)Val, Argument, ArgumentLen,
648                             OutStr);
649      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
650        HandleIntegerSModifier(Val, OutStr);
651      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
652        HandlePluralModifier(*this, (unsigned)Val, Argument, ArgumentLen,
653                             OutStr);
654      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
655        HandleOrdinalModifier((unsigned)Val, OutStr);
656      } else {
657        assert(ModifierLen == 0 && "Unknown integer modifier");
658        llvm::raw_svector_ostream(OutStr) << Val;
659      }
660      break;
661    }
662    case DiagnosticsEngine::ak_uint: {
663      unsigned Val = getArgUInt(ArgNo);
664
665      if (ModifierIs(Modifier, ModifierLen, "select")) {
666        HandleSelectModifier(*this, Val, Argument, ArgumentLen, OutStr);
667      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
668        HandleIntegerSModifier(Val, OutStr);
669      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
670        HandlePluralModifier(*this, (unsigned)Val, Argument, ArgumentLen,
671                             OutStr);
672      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
673        HandleOrdinalModifier(Val, OutStr);
674      } else {
675        assert(ModifierLen == 0 && "Unknown integer modifier");
676        llvm::raw_svector_ostream(OutStr) << Val;
677      }
678      break;
679    }
680    // ---- NAMES and TYPES ----
681    case DiagnosticsEngine::ak_identifierinfo: {
682      const IdentifierInfo *II = getArgIdentifier(ArgNo);
683      assert(ModifierLen == 0 && "No modifiers for strings yet");
684
685      // Don't crash if get passed a null pointer by accident.
686      if (!II) {
687        const char *S = "(null)";
688        OutStr.append(S, S + strlen(S));
689        continue;
690      }
691
692      llvm::raw_svector_ostream(OutStr) << '\'' << II->getName() << '\'';
693      break;
694    }
695    case DiagnosticsEngine::ak_qualtype:
696    case DiagnosticsEngine::ak_declarationname:
697    case DiagnosticsEngine::ak_nameddecl:
698    case DiagnosticsEngine::ak_nestednamespec:
699    case DiagnosticsEngine::ak_declcontext:
700      getDiags()->ConvertArgToString(Kind, getRawArg(ArgNo),
701                                     Modifier, ModifierLen,
702                                     Argument, ArgumentLen,
703                                     FormattedArgs.data(), FormattedArgs.size(),
704                                     OutStr, QualTypeVals);
705      break;
706    }
707
708    // Remember this argument info for subsequent formatting operations.  Turn
709    // std::strings into a null terminated string to make it be the same case as
710    // all the other ones.
711    if (Kind != DiagnosticsEngine::ak_std_string)
712      FormattedArgs.push_back(std::make_pair(Kind, getRawArg(ArgNo)));
713    else
714      FormattedArgs.push_back(std::make_pair(DiagnosticsEngine::ak_c_string,
715                                        (intptr_t)getArgStdStr(ArgNo).c_str()));
716
717  }
718}
719
720StoredDiagnostic::StoredDiagnostic() { }
721
722StoredDiagnostic::StoredDiagnostic(DiagnosticsEngine::Level Level, unsigned ID,
723                                   StringRef Message)
724  : ID(ID), Level(Level), Loc(), Message(Message) { }
725
726StoredDiagnostic::StoredDiagnostic(DiagnosticsEngine::Level Level,
727                                   const Diagnostic &Info)
728  : ID(Info.getID()), Level(Level)
729{
730  assert((Info.getLocation().isInvalid() || Info.hasSourceManager()) &&
731       "Valid source location without setting a source manager for diagnostic");
732  if (Info.getLocation().isValid())
733    Loc = FullSourceLoc(Info.getLocation(), Info.getSourceManager());
734  llvm::SmallString<64> Message;
735  Info.FormatDiagnostic(Message);
736  this->Message.assign(Message.begin(), Message.end());
737
738  Ranges.reserve(Info.getNumRanges());
739  for (unsigned I = 0, N = Info.getNumRanges(); I != N; ++I)
740    Ranges.push_back(Info.getRange(I));
741
742  FixIts.reserve(Info.getNumFixItHints());
743  for (unsigned I = 0, N = Info.getNumFixItHints(); I != N; ++I)
744    FixIts.push_back(Info.getFixItHint(I));
745}
746
747StoredDiagnostic::StoredDiagnostic(DiagnosticsEngine::Level Level, unsigned ID,
748                                   StringRef Message, FullSourceLoc Loc,
749                                   ArrayRef<CharSourceRange> Ranges,
750                                   ArrayRef<FixItHint> Fixits)
751  : ID(ID), Level(Level), Loc(Loc), Message(Message)
752{
753  this->Ranges.assign(Ranges.begin(), Ranges.end());
754  this->FixIts.assign(FixIts.begin(), FixIts.end());
755}
756
757StoredDiagnostic::~StoredDiagnostic() { }
758
759/// IncludeInDiagnosticCounts - This method (whose default implementation
760///  returns true) indicates whether the diagnostics handled by this
761///  DiagnosticConsumer should be included in the number of diagnostics
762///  reported by DiagnosticsEngine.
763bool DiagnosticConsumer::IncludeInDiagnosticCounts() const { return true; }
764
765PartialDiagnostic::StorageAllocator::StorageAllocator() {
766  for (unsigned I = 0; I != NumCached; ++I)
767    FreeList[I] = Cached + I;
768  NumFreeListEntries = NumCached;
769}
770
771PartialDiagnostic::StorageAllocator::~StorageAllocator() {
772  // Don't assert if we are in a CrashRecovery context, as this
773  // invariant may be invalidated during a crash.
774  assert((NumFreeListEntries == NumCached || llvm::CrashRecoveryContext::isRecoveringFromCrash()) && "A partial is on the lamb");
775}
776