C++ UnresolvedSetImpl::end方法代码示例

static void notePlausibleOverloads(Sema &S, SourceLocation Loc,
                                   const UnresolvedSetImpl &Overloads,
                                   bool (*IsPlausibleResult)(QualType)) {
  if (!IsPlausibleResult)
    return noteOverloads(S, Overloads, Loc);

  UnresolvedSet<2> PlausibleOverloads;
  for (OverloadExpr::decls_iterator It = Overloads.begin(),
         DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
    const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It);
    QualType OverloadResultTy = OverloadDecl->getResultType();
    if (IsPlausibleResult(OverloadResultTy))
      PlausibleOverloads.addDecl(It.getDecl());
  }
  noteOverloads(S, PlausibleOverloads, Loc);
}

/// \brief Give notes for a set of overloads.
///
/// A companion to isExprCallable. In cases when the name that the programmer
/// wrote was an overloaded function, we may be able to make some guesses about
/// plausible overloads based on their return types; such guesses can be handed
/// off to this method to be emitted as notes.
///
/// \param Overloads - The overloads to note.
/// \param FinalNoteLoc - If we've suppressed printing some overloads due to
///  -fshow-overloads=best, this is the location to attach to the note about too
///  many candidates. Typically this will be the location of the original
///  ill-formed expression.
void Sema::NoteOverloads(const UnresolvedSetImpl &Overloads,
                         const SourceLocation FinalNoteLoc) {
  int ShownOverloads = 0;
  int SuppressedOverloads = 0;
  for (UnresolvedSetImpl::iterator It = Overloads.begin(),
       DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
    // FIXME: Magic number for max shown overloads stolen from
    // OverloadCandidateSet::NoteCandidates.
    if (ShownOverloads >= 4 &&
        Diags.getShowOverloads() == DiagnosticsEngine::Ovl_Best) {
      ++SuppressedOverloads;
      continue;
    }
    Diag(cast<FunctionDecl>(*It)->getSourceRange().getBegin(),
         diag::note_member_ref_possible_intended_overload);
    ++ShownOverloads;
  }
  if (SuppressedOverloads)
    Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates)
        << SuppressedOverloads;
}

/// \brief Give notes for a set of overloads.
///
/// A companion to isExprCallable. In cases when the name that the programmer
/// wrote was an overloaded function, we may be able to make some guesses about
/// plausible overloads based on their return types; such guesses can be handed
/// off to this method to be emitted as notes.
///
/// \param Overloads - The overloads to note.
/// \param FinalNoteLoc - If we've suppressed printing some overloads due to
///  -fshow-overloads=best, this is the location to attach to the note about too
///  many candidates. Typically this will be the location of the original
///  ill-formed expression.
static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads,
                          const SourceLocation FinalNoteLoc) {
  int ShownOverloads = 0;
  int SuppressedOverloads = 0;
  for (UnresolvedSetImpl::iterator It = Overloads.begin(),
       DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
    // FIXME: Magic number for max shown overloads stolen from
    // OverloadCandidateSet::NoteCandidates.
    if (ShownOverloads >= 4 && S.Diags.getShowOverloads() == Ovl_Best) {
      ++SuppressedOverloads;
      continue;
    }

    NamedDecl *Fn = (*It)->getUnderlyingDecl();
    S.Diag(Fn->getLocation(), diag::note_possible_target_of_call);
    ++ShownOverloads;
  }

  if (SuppressedOverloads)
    S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates)
      << SuppressedOverloads;
}