[cfe-dev] Displaying prototype tooltips in an IDE

[Argyrios Kyrtzidis]

Is clang_getCursorDisplayName on the function sufficient for your purposes or you need the parameter info ?

On Aug 23, 2011, at 4:43 PM, Jared Low wrote:

> We are using Clang as our compiler, and I want to display prototype tooltips in the IDE. I'm using libclang to get various source code browsing information. 
> 
> In order to get the prototype information, I create the translation unit with clang_createTranslationUnit. Then I traverse the translation unit with clang_visitChildren. Whenever I come upon a cursor of kind CXCursor_FunctionDecl, I remember the cursor and then add any cursors of kind CXCursor_ParmDecl that follow to a parameter list. Then when I want to display the function prototype, I go thru the parameter cursor list, getting each parameter's type and name. 
> 
> This seems to work fine, except for variable argument functions. For example, for the function 
> 
> void VarArgFunc(int p1, ...) 
> { 
>         va_list        parmInfo; 
>         va_start(parmInfo, p1); 
>         va_end(parmInfo); 
> } 
> 
> when traversing the translation unit with clang_visitChildren, the CXCursorVisitor callback is not called for the '...' variable argument parameter. This means that I can't tell that the function has a variable argument parameter, and when I show the prototype tooltip, it just shows "void VarArgFunc(int p1)". 
> 
> How can I detect that the function has a variable argument parameter? Is there some other better way to get this information? 
> 
> Thanks_______________________________________________
> cfe-dev mailing list
> cfe-dev at cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev

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