Exemplo n.º 1
0
/// \brief Late parse a C++ function template in Microsoft mode.
void Parser::ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT) {
  if(!LMT.D)
     return;

  // Get the FunctionDecl.
  FunctionDecl *FD = 0;
  if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(LMT.D))
    FD = FunTmpl->getTemplatedDecl();
  else
    FD = cast<FunctionDecl>(LMT.D);

  // To restore the context after late parsing.
  Sema::ContextRAII GlobalSavedContext(Actions, Actions.CurContext);

  SmallVector<ParseScope*, 4> TemplateParamScopeStack;
  DeclaratorDecl* Declarator = dyn_cast<DeclaratorDecl>(FD);
  if (Declarator && Declarator->getNumTemplateParameterLists() != 0) {
    TemplateParamScopeStack.push_back(new ParseScope(this, Scope::TemplateParamScope));
    Actions.ActOnReenterDeclaratorTemplateScope(getCurScope(), Declarator);
    Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);
  } else {
    // Get the list of DeclContext to reenter.
    SmallVector<DeclContext*, 4> DeclContextToReenter;
    DeclContext *DD = FD->getLexicalParent();
    while (DD && !DD->isTranslationUnit()) {
      DeclContextToReenter.push_back(DD);
      DD = DD->getLexicalParent();
    }

    // Reenter template scopes from outmost to innermost.
    SmallVector<DeclContext*, 4>::reverse_iterator II =
    DeclContextToReenter.rbegin();
    for (; II != DeclContextToReenter.rend(); ++II) {
      if (ClassTemplatePartialSpecializationDecl* MD =
                dyn_cast_or_null<ClassTemplatePartialSpecializationDecl>(*II)) {
        TemplateParamScopeStack.push_back(new ParseScope(this,
                                                   Scope::TemplateParamScope));
        Actions.ActOnReenterTemplateScope(getCurScope(), MD);
      } else if (CXXRecordDecl* MD = dyn_cast_or_null<CXXRecordDecl>(*II)) {
        TemplateParamScopeStack.push_back(new ParseScope(this,
                                                    Scope::TemplateParamScope,
                                       MD->getDescribedClassTemplate() != 0 ));
        Actions.ActOnReenterTemplateScope(getCurScope(),
                                          MD->getDescribedClassTemplate());
      }
      TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope));
      Actions.PushDeclContext(Actions.getCurScope(), *II);
    }
    TemplateParamScopeStack.push_back(new ParseScope(this,
                                      Scope::TemplateParamScope));
    Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);
  }

  assert(!LMT.Toks.empty() && "Empty body!");

  // Append the current token at the end of the new token stream so that it
  // doesn't get lost.
  LMT.Toks.push_back(Tok);
  PP.EnterTokenStream(LMT.Toks.data(), LMT.Toks.size(), true, false);

  // Consume the previously pushed token.
  ConsumeAnyToken();
  assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try))
         && "Inline method not starting with '{', ':' or 'try'");

  // Parse the method body. Function body parsing code is similar enough
  // to be re-used for method bodies as well.
  ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);

  // Recreate the containing function DeclContext.
  Sema::ContextRAII FunctionSavedContext(Actions, Actions.getContainingDC(FD));

  if (FunctionTemplateDecl *FunctionTemplate
        = dyn_cast_or_null<FunctionTemplateDecl>(LMT.D))
    Actions.ActOnStartOfFunctionDef(getCurScope(),
                                   FunctionTemplate->getTemplatedDecl());
  if (FunctionDecl *Function = dyn_cast_or_null<FunctionDecl>(LMT.D))
    Actions.ActOnStartOfFunctionDef(getCurScope(), Function);


  if (Tok.is(tok::kw_try)) {
    ParseFunctionTryBlock(LMT.D, FnScope);
  } else {
    if (Tok.is(tok::colon))
      ParseConstructorInitializer(LMT.D);
    else
      Actions.ActOnDefaultCtorInitializers(LMT.D);

    if (Tok.is(tok::l_brace)) {
      ParseFunctionStatementBody(LMT.D, FnScope);
      Actions.MarkAsLateParsedTemplate(FD, false);
    } else
      Actions.ActOnFinishFunctionBody(LMT.D, 0);
  }

  // Exit scopes.
  FnScope.Exit();
  SmallVector<ParseScope*, 4>::reverse_iterator I =
   TemplateParamScopeStack.rbegin();
  for (; I != TemplateParamScopeStack.rend(); ++I)
    delete *I;

  DeclGroupPtrTy grp = Actions.ConvertDeclToDeclGroup(LMT.D);
  if (grp)
    Actions.getASTConsumer().HandleTopLevelDecl(grp.get());
}
Exemplo n.º 2
0
/// \brief Late parse a C++ function template in Microsoft mode.
void Parser::ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT) {
  if(!LMT.D)
     return;

  // If this is a member template, introduce the template parameter scope.
  ParseScope TemplateScope(this, Scope::TemplateParamScope);

  // Get the FunctionDecl.
  FunctionDecl *FD = 0;
  if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(LMT.D))
    FD = FunTmpl->getTemplatedDecl();
  else
    FD = cast<FunctionDecl>(LMT.D);
  
  // Reinject the template parameters.
  DeclaratorDecl* Declarator = dyn_cast<DeclaratorDecl>(FD);
  if (Declarator && Declarator->getNumTemplateParameterLists() != 0) {
    Actions.ActOnReenterDeclaratorTemplateScope(getCurScope(), Declarator);
    Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);
  } else {
    Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);

    DeclContext *DD = FD->getLexicalParent();
    while (DD && DD->isRecord()) {
      if (ClassTemplatePartialSpecializationDecl* MD =
                  dyn_cast_or_null<ClassTemplatePartialSpecializationDecl>(DD))
          Actions.ActOnReenterTemplateScope(getCurScope(), MD);
      else if (CXXRecordDecl* MD = dyn_cast_or_null<CXXRecordDecl>(DD))
          Actions.ActOnReenterTemplateScope(getCurScope(),
                                            MD->getDescribedClassTemplate());

      DD = DD->getLexicalParent();
    }
  }
  assert(!LMT.Toks.empty() && "Empty body!");

  // Append the current token at the end of the new token stream so that it
  // doesn't get lost.
  LMT.Toks.push_back(Tok);
  PP.EnterTokenStream(LMT.Toks.data(), LMT.Toks.size(), true, false);

  // Consume the previously pushed token.
  ConsumeAnyToken();
  assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try))
         && "Inline method not starting with '{', ':' or 'try'");

  // Parse the method body. Function body parsing code is similar enough
  // to be re-used for method bodies as well.
  ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);

  // Recreate the DeclContext.
  Sema::ContextRAII SavedContext(Actions, Actions.getContainingDC(FD));

  if (FunctionTemplateDecl *FunctionTemplate
        = dyn_cast_or_null<FunctionTemplateDecl>(LMT.D))
    Actions.ActOnStartOfFunctionDef(getCurScope(),
                                   FunctionTemplate->getTemplatedDecl());
  if (FunctionDecl *Function = dyn_cast_or_null<FunctionDecl>(LMT.D))
    Actions.ActOnStartOfFunctionDef(getCurScope(), Function);
  

  if (Tok.is(tok::kw_try)) {
    ParseFunctionTryBlock(LMT.D, FnScope);
    return;
  }
  if (Tok.is(tok::colon)) {
    ParseConstructorInitializer(LMT.D);

    // Error recovery.
    if (!Tok.is(tok::l_brace)) {
      Actions.ActOnFinishFunctionBody(LMT.D, 0);
      return;
    }
  } else
    Actions.ActOnDefaultCtorInitializers(LMT.D);

  ParseFunctionStatementBody(LMT.D, FnScope);
  Actions.MarkAsLateParsedTemplate(FD, false);

  DeclGroupPtrTy grp = Actions.ConvertDeclToDeclGroup(LMT.D);
  if (grp)
    Actions.getASTConsumer().HandleTopLevelDecl(grp.get());
}