Getting more info about function calls.

Milian Wolff mail at
Fri Oct 23 15:17:20 UTC 2009

On Friday, 23. October 2009 16:08:24 Bertjan Broeksema wrote:
> Hi all,
> I'd like to do the following.
> Given the use of a function, how can I get the following information:
> * The range of the function name of the specific call.

The Use-Range should be the function name in the call.

> * The range of the accessor (in case of a non-global method  or calls on
>  this)
>  * The range of the expression on which the method is called (in case
>  of non global methods or calls on this)

You'll have to use a tokenizer or something there afaik. I don't think such 
access is in the DUChain API so far. A candidate maybe?

> I have the idea that non of this information is currently accessible given
>  the use of a function (i.e. one of the SimpleRange objects returned by
>  ClassFunctionDeclaration::uses() or FunctionDeclaration::uses()). I think
>  this needs work in the DUChain builder but I dont' understand it well
>  enough yet.
> My idea would be to add a new structure FunctionCall, which will be stored
>  in the DUChain and contain the above information. In addition it could
>  also store a pointer to the declaration of the this object (i.e. the
>  object on which it is called) in case of non global functions. Any
>  suggestions on how to implement this would be more than welcome. If you
>  think this is an useful addition for KDevelop in general I'd of course be
>  more than happy to add it to the (cpp)duchain directly.
> By the way, the use case is this: In my transform language i'd like to
>  provide access to different parts of a call.
> before transform:
> Class *obj2 = (Class*)someObj->child("name", "Class");
> Class *obj3 = (Class*)child("name", "Class");
> After transform:
> Class *obj2 = (Class*)qFindChild<Class>(someObj, "name");
> Class *obj3 = (Class*)qFindChild<Class>("name", "Class");
> Rule:
> <action type="Replace" item="*">
> qFindChild<${literalVal(MemberArg[1])}>(${Object},${MemberArg[0]})
> </action>
> Cheers,
> Bertjan

Milian Wolff
mail at
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