C++ DirectiveList::begin方法代码示例

/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, const llvm::SourceMgr &SourceMgr,
                              DirectiveList &DL, DiagnosticsEngine::Level Kind) {
  if (DL.empty())
    return 0;

  for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
    Directive &D = **I;

    Diags.ReportError(D.DirectiveLoc,llvm::Twine("Inconsistend verify directive: ")+D.Text);
  }

  return DL.size();
}

 void
 DiagnoseFailures(DirectiveList & DL, DirectiveMap & DM) {
   for(typename DirectiveList::const_iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
     Underlying & Dir = **I;
     unsigned int Line = getCompilerInstance().getSourceManager().getExpansionLineNumber(Dir.getLocation());
     std::pair<typename DirectiveMap::iterator, typename DirectiveMap::iterator> rng = DM.equal_range(Line);
     switch (std::distance(rng.first, rng.second))
     {
       case 0:
         Diags.Report(Dir.getLocation(), ErrVerifyDiagNoCorrespondingDecl);
         break;
       default:
         // Delay evaluation of diagnostics until we are certain that
         // none of the statements on this line match
         llvm::SmallVector<MaybeDiagnostic, 4> diags;
         bool isGood = false;
         // TODO: If something is unexpected, then it should not appear in any of the subexpressions.
         for(typename DirectiveMap::iterator it = rng.first, end = rng.second; it != end; ++it) {
           MaybeDiagnostic MD = Dir.Match(it->second.second,Diags);
           // unexpected-<foo> must never fail
           if(Dir.isNegate()) {
             if(MD.isDiagnostic()) {
               diags.push_back(MD);
               isGood = false;
               break;
             }
           } else {
             if(MD.isDiagnostic())
               diags.push_back(MD);
             else
               isGood = true;
           }
         }
         if(!isGood) {
           for(std::size_t ii = 0; ii < diags.size(); ++ii)
             diags[ii].maybeReport();
         }
         break;
     }
   }
 }

/// CheckLists - Compare expected to seen diagnostic lists and return the
/// the difference between them.
///
static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
                           const char *Label,
                           DirectiveList &Left,
                           const_diag_iterator d2_begin,
                           const_diag_iterator d2_end) {
  DirectiveList LeftOnly;
  DiagList Right(d2_begin, d2_end);

  for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
    Directive& D = **I;
    unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);

    for (unsigned i = 0; i < D.Max; ++i) {
      DiagList::iterator II, IE;
      for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
        unsigned LineNo2 = SourceMgr.getPresumedLineNumber(II->first);
        if (LineNo1 != LineNo2)
          continue;

        if (!IsFromSameFile(SourceMgr, D.DiagnosticLoc, II->first))
          continue;

        const std::string &RightText = II->second;
        if (D.match(RightText))
          break;
      }
      if (II == IE) {
        // Not found.
        if (i >= D.Min) break;
        LeftOnly.push_back(*I);
      } else {
        // Found. The same cannot be found twice.
        Right.erase(II);
      }
    }
  }
  // Now all that's left in Right are those that were not matched.
  unsigned num = PrintExpected(Diags, SourceMgr, LeftOnly, Label);
  num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(), Label);
  return num;
}

static unsigned PrintProblem(Diagnostic &Diags, SourceManager *SourceMgr,
                             DirectiveList &DL, const char *Kind,
                             bool Expected) {
  if (DL.empty())
    return 0;

  llvm::SmallString<256> Fmt;
  llvm::raw_svector_ostream OS(Fmt);
  for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
    Directive& D = **I;
    if (D.Location.isInvalid() || !SourceMgr)
      OS << "\n  (frontend)";
    else
      OS << "\n  Line " << SourceMgr->getInstantiationLineNumber(D.Location);
    OS << ": " << D.Text;
  }

  Diags.Report(diag::err_verify_inconsistent_diags)
    << Kind << !Expected << OS.str();
  return DL.size();
}

/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
                              DirectiveList &DL, const char *Kind) {
  if (DL.empty())
    return 0;

  SmallString<256> Fmt;
  llvm::raw_svector_ostream OS(Fmt);
  for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
    Directive &D = **I;
    OS << "\n  Line " << SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
    if (D.DirectiveLoc != D.DiagnosticLoc)
      OS << " (directive at "
         << SourceMgr.getFilename(D.DirectiveLoc) << ":"
         << SourceMgr.getPresumedLineNumber(D.DirectiveLoc) << ")";
    OS << ": " << D.Text;
  }

  Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
    << Kind << /*Unexpected=*/false << OS.str();
  return DL.size();
}

/// CheckLists - Compare expected to seen diagnostic lists and return the
/// the difference between them.
///
static unsigned CheckLists(Diagnostic &Diags, SourceManager &SourceMgr,
                           const char *Label,
                           DirectiveList &Left,
                           const_diag_iterator d2_begin,
                           const_diag_iterator d2_end) {
  DirectiveList LeftOnly;
  DiagList Right(d2_begin, d2_end);

  for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
    Directive& D = **I;
    unsigned LineNo1 = SourceMgr.getInstantiationLineNumber(D.Location);

    for (unsigned i = 0; i < D.Count; ++i) {
      DiagList::iterator II, IE;
      for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
        unsigned LineNo2 = SourceMgr.getInstantiationLineNumber(II->first);
        if (LineNo1 != LineNo2)
          continue;

        const std::string &RightText = II->second;
        if (D.Match(RightText))
          break;
      }
      if (II == IE) {
        // Not found.
        LeftOnly.push_back(*I);
      } else {
        // Found. The same cannot be found twice.
        Right.erase(II);
      }
    }
  }
  // Now all that's left in Right are those that were not matched.

  return (PrintProblem(Diags, &SourceMgr, LeftOnly, Label, true) +
          PrintProblem(Diags, &SourceMgr, Right.begin(), Right.end(),
                       Label, false));
}

/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, llvm::SourceMgr &SourceMgr,
                              DirectiveList &DL, const char *Kind) {
  if (DL.empty())
    return 0;

  SmallString<256> Fmt;
  llvm::raw_svector_ostream OS(Fmt);
  for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
    Directive &D = **I;
    OS << "\n  Line " << SourceMgr.getLineAndColumn(D.DiagnosticLoc).first;
    if (D.DirectiveLoc != D.DiagnosticLoc) {
      int BufID = SourceMgr.FindBufferContainingLoc(D.DirectiveLoc);
      OS << " (directive at "
         << SourceMgr.getMemoryBuffer(BufID)->getBufferIdentifier()
         << SourceMgr.getLineAndColumn(D.DirectiveLoc).first << ")";
    }
    OS << ": " << D.Text;
  }

  Diags.Report(SourceLocation(), diag::verify_inconsistent_diags)
    << Kind << /*Unexpected=*/false << OS.str();
  return DL.size();
}