如何区分Clang AST访问者中的函数定义和函数声明

Question

我使用Clang libtooling开发了一个AST访问者，我想区分函数原型和函数声明。我的AST访问者将这两种情况都作为函数声明。下面你可以看到我访问函数声明的代码：

bool VisitFunctionDecl(FunctionDecl *func)
   {
      if(astContext->getSourceManager().isInMainFile(func->getLocStart()) && func->hasBody()) //checks if the node is in the main (input) file.
      {
           FullSourceLoc FullLocation = astContext->getFullLoc(func->getLocStart());
           string funcName = func->getNameInfo().getName().getAsString();
           string funcType = func->getResultType().getAsString();
           string srcFunc = filename + "_" + funcName;
           REPORT << "Function Declaration [" << FullLocation.getSpellingLineNumber() << "," << FullLocation.getSpellingColumnNumber() << "]: " <<  funcName << " of type " << funcType << "\n";
           if (append == 0 && numFunctions == 0)
              APIs << srcFunc <<":";
           else
              APIs << "\n" << srcFunc <<":";
           APIs  <<funcType << ",";
           numFunctions++;
       }
       return true;
    }

func-＆gt; hasBody（）无法区分这两件事。任何想法??

Answer 1

使用FunctionDecl::isThisDeclarationADefinition()。