C++ IdDeclInfo类代码示例

/// AddDecl - Link the decl to its shadowed decl chain.
void IdentifierResolver::AddDecl(NamedDecl *D) {
  DeclarationName Name = D->getDeclName();
  if (IdentifierInfo *II = Name.getAsIdentifierInfo()) {
    updatingIdentifier(*II);
//@@
    if (II->isMetaGenerated()) return;
//@@
  }

  void *Ptr = Name.getFETokenInfo<void>();

  if (!Ptr) {
    Name.setFETokenInfo(D);
    return;
  }

  IdDeclInfo *IDI;

  if (isDeclPtr(Ptr)) {
    Name.setFETokenInfo(nullptr);
    IDI = &(*IdDeclInfos)[Name];
    NamedDecl *PrevD = static_cast<NamedDecl*>(Ptr);
    IDI->AddDecl(PrevD);
  } else
    IDI = toIdDeclInfo(Ptr);

  IDI->AddDecl(D);
}

void IdentifierResolver::iterator::incrementSlowCase() {
  NamedDecl *D = **this;
  void *InfoPtr = D->getDeclName().getFETokenInfo<void>();
  assert(!isDeclPtr(InfoPtr) && "Decl with wrong id ?");
  IdDeclInfo *Info = toIdDeclInfo(InfoPtr);

  BaseIter I = getIterator();
  if (I != Info->decls_begin())
    *this = iterator(I-1);
  else // No more decls.
    *this = iterator();
}

/// begin - Returns an iterator for decls with name 'Name'.
IdentifierResolver::iterator
IdentifierResolver::begin(DeclarationName Name) {
    void *Ptr = Name.getFETokenInfo<void>();
    if (!Ptr) return end();

    if (isDeclPtr(Ptr))
        return iterator(static_cast<NamedDecl*>(Ptr));

    IdDeclInfo *IDI = toIdDeclInfo(Ptr);

    IdDeclInfo::DeclsTy::iterator I = IDI->decls_end();
    if (I != IDI->decls_begin())
        return iterator(I-1);
    // No decls found.
    return end();
}

void IdentifierResolver::InsertDeclAfter(iterator Pos, NamedDecl *D) {
  DeclarationName Name = D->getDeclName();
  if (IdentifierInfo *II = Name.getAsIdentifierInfo())
    updatingIdentifier(*II);
  
  void *Ptr = Name.getFETokenInfo<void>();
  
  if (!Ptr) {
    AddDecl(D);
    return;
  }

  if (isDeclPtr(Ptr)) {
    // We only have a single declaration: insert before or after it,
    // as appropriate.
    if (Pos == iterator()) {
      // Add the new declaration before the existing declaration.
      NamedDecl *PrevD = static_cast<NamedDecl*>(Ptr);
      RemoveDecl(PrevD);
      AddDecl(D);
      AddDecl(PrevD);
    } else {
      // Add new declaration after the existing declaration.
      AddDecl(D);
    }

    return;
  }

  if (IdentifierInfo *II = Name.getAsIdentifierInfo())
    if (II->isFromAST())
      II->setChangedSinceDeserialization();
  
  // General case: insert the declaration at the appropriate point in the 
  // list, which already has at least two elements.
  IdDeclInfo *IDI = toIdDeclInfo(Ptr);
  if (Pos.isIterator()) {
    IDI->InsertDecl(Pos.getIterator() + 1, D);
  } else
    IDI->InsertDecl(IDI->decls_begin(), D);
}

void IdentifierResolver::AddDeclToIdentifierChain(IdentifierInfo *II,
        NamedDecl *D) {
    void *Ptr = II->getFETokenInfo<void>();

    if (!Ptr) {
        II->setFETokenInfo(D);
        return;
    }

    IdDeclInfo *IDI;

    if (isDeclPtr(Ptr)) {
        II->setFETokenInfo(NULL);
        IDI = &(*IdDeclInfos)[II];
        NamedDecl *PrevD = static_cast<NamedDecl*>(Ptr);
        IDI->AddDecl(PrevD);
    } else
        IDI = toIdDeclInfo(Ptr);

    IDI->AddDecl(D);
}

/// AddShadowedDecl - Link the decl to its shadowed decl chain putting it
/// after the decl that the iterator points to, thus the 'Shadow' decl will be
/// encountered before the 'D' decl.
void IdentifierResolver::AddShadowedDecl(NamedDecl *D, NamedDecl *Shadow) {
  assert(D->getDeclName() == Shadow->getDeclName() && "Different ids!");

  DeclarationName Name = D->getDeclName();
  void *Ptr = Name.getFETokenInfo<void>();
  assert(Ptr && "No decl from Ptr ?");

  IdDeclInfo *IDI;

  if (isDeclPtr(Ptr)) {
    Name.setFETokenInfo(NULL);
    IDI = &(*IdDeclInfos)[Name];
    NamedDecl *PrevD = static_cast<NamedDecl*>(Ptr);
    assert(PrevD == Shadow && "Invalid shadow decl ?");
    IDI->AddDecl(D);
    IDI->AddDecl(PrevD);
    return;
  }

  IDI = toIdDeclInfo(Ptr);
  IDI->AddShadowed(D, Shadow);
}

/// begin - Returns an iterator for decls with name 'Name'.
IdentifierResolver::iterator
IdentifierResolver::begin(DeclarationName Name) {
  if (IdentifierInfo *II = Name.getAsIdentifierInfo()) {
    readingIdentifier(*II);
//@@
    if (II->isMetaGenerated()) return end();
//@@
  }
    
  void *Ptr = Name.getFETokenInfo<void>();
  if (!Ptr) return end();

  if (isDeclPtr(Ptr))
    return iterator(static_cast<NamedDecl*>(Ptr));

  IdDeclInfo *IDI = toIdDeclInfo(Ptr);

  IdDeclInfo::DeclsTy::iterator I = IDI->decls_end();
  if (I != IDI->decls_begin())
    return iterator(I-1);
  // No decls found.
  return end();
}

bool IdentifierResolver::tryAddTopLevelDecl(NamedDecl *D, DeclarationName Name){
  if (IdentifierInfo *II = Name.getAsIdentifierInfo())
    readingIdentifier(*II);
  
  void *Ptr = Name.getFETokenInfo<void>();
    
  if (!Ptr) {
    Name.setFETokenInfo(D);
    return true;
  }
  
  IdDeclInfo *IDI;
  
  if (isDeclPtr(Ptr)) {
    NamedDecl *PrevD = static_cast<NamedDecl*>(Ptr);
    
    switch (compareDeclarations(PrevD, D)) {
    case DMK_Different:
      break;
      
    case DMK_Ignore:
      return false;
      
    case DMK_Replace:
      Name.setFETokenInfo(D);
      return true;
    }

    Name.setFETokenInfo(nullptr);
    IDI = &(*IdDeclInfos)[Name];
    
    // If the existing declaration is not visible in translation unit scope,
    // then add the new top-level declaration first.
    if (!PrevD->getDeclContext()->getRedeclContext()->isTranslationUnit()) {
      IDI->AddDecl(D);
      IDI->AddDecl(PrevD);
    } else {
      IDI->AddDecl(PrevD);
      IDI->AddDecl(D);
    }
    return true;
  } 
  
  IDI = toIdDeclInfo(Ptr);

  // See whether this declaration is identical to any existing declarations.
  // If not, find the right place to insert it.
  for (IdDeclInfo::DeclsTy::iterator I = IDI->decls_begin(), 
                                  IEnd = IDI->decls_end();
       I != IEnd; ++I) {
    
    switch (compareDeclarations(*I, D)) {
    case DMK_Different:
      break;
      
    case DMK_Ignore:
      return false;
      
    case DMK_Replace:
      *I = D;
      return true;
    }
    
    if (!(*I)->getDeclContext()->getRedeclContext()->isTranslationUnit()) {
      // We've found a declaration that is not visible from the translation
      // unit (it's in an inner scope). Insert our declaration here.
      IDI->InsertDecl(I, D);
      return true;
    }
  }
  
  // Add the declaration to the end.
  IDI->AddDecl(D);
  return true;
}