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RE: [cdt-dev] How to differenciate a call to afunctionfromareferencing its address?

Func(5, NUMBER) is not an expression, it is a macro-expansion.
The arguments to a macro-expansion are sequences of tokens. These
token-sequences can be used in different ways. The may or may not 
be subject for recursive expansion.

Example:
#define USE(x, y) x + x##y + y
#define A 1
#define B 2
USE(A, B);  // expands to 1 + AB + 2

If you have a nested macro expansion (as 'NUMBER' is in your example)
you can ask for the image-location of this macro reference 
(IASTName.getImageLocation()) which will tell you where the nested 
expansion comes from (in your case it will be an image-location with
kind==ARGUMENT_TO_MACRO_EXPANSION).

Markus.

> -----Original Message-----
> From: cdt-dev-bounces@xxxxxxxxxxx 
> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Dmitry Smirnov
> Sent: Wednesday, October 15, 2008 11:42 AM
> To: CDT General developers list.
> Subject: Re: [cdt-dev] How to differenciate a call to 
> afunctionfromareferencing its address?
> Importance: Low
> 
> I need to find out that the second argument of a expression Func( 5,
> NUMBER) was NUMBER which is a macro.
> I cannot figure out how to do this with AST.
> 
> 2008/10/15 Schorn, Markus <Markus.Schorn@xxxxxxxxxxxxx>:
> > I am uncertain whether I understand your question. When you use the 
> > macro twice, there will simply be a second reference to the macro.
> > Markus.
> >
> >> -----Original Message-----
> >> From: cdt-dev-bounces@xxxxxxxxxxx
> >> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Dmitry Smirnov
> >> Sent: Wednesday, October 15, 2008 11:11 AM
> >> To: CDT General developers list.
> >> Subject: Re: [cdt-dev] How to differenciate a call to a 
> >> functionfromareferencing its address?
> >> Importance: Low
> >>
> >> Hi,
> >>
> >> One more question about IASTTFunctionCallExpression.
> >> I cannot figure out how to deal with the arguments of the 
> macro which 
> >> is a function-style macro.
> >>
> >> struct myStruct
> >> {
> >>   void (*funcPtr)(int v1, intv2);
> >> }
> >>
> >> #define NUMBER 10
> >>
> >> #define Func( p, v1, v2 ) p->funcPtr(v1, v2)
> >>
> >> int main
> >> {
> >>   Func( 5, NUMBER);
> >> }
> >>
> >> I'm getting a IASTTFunctionCallExpression for a Func call 
> in main().
> >> Now I need to realize that argument 2 is a macro with name NUMBER.
> >>
> >> With IASTTFunctionCallExpression.getParameterExpression() 
> I can get a 
> >> list of parameters with values 5 and 10.
> >> With IASTTFunctionCallExpression.getNodeLocations() I can get 
> >> IASTMacroExpansionLocation and its nested macros.
> >> In this case, I will get one nested macro (ASTMacroReferenceName in
> >> fact) for NUMBER.
> >>
> >> The question is: how to map this ASTMacroReferenceName to a second 
> >> (or any other) argument?
> >>
> >>
> >> 2008/10/1 Schorn, Markus <Markus.Schorn@xxxxxxxxxxxxx>:
> >> > The AST contains the entire information. In one case you'd
> >> be looking
> >> > at a function-call expression 
> (IASTFunctionCallExpression), in the 
> >> > other there would not be one. You can find the function-call by 
> >> > looking at the parents of the IASTName, which is the
> >> reference to the
> >> > function. The arguments are then available via 
> >> > IASTTFunctionCallExpression.getParameterExpression(). 
> This method 
> >> > should correctly be called getArgumentExpression().
> >> >
> >> > Markus.
> >> >
> >> >> -----Original Message-----
> >> >> From: cdt-dev-bounces@xxxxxxxxxxx
> >> >> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Dmitry Smirnov
> >> >> Sent: Wednesday, October 01, 2008 5:25 PM
> >> >> To: CDT General developers list.
> >> >> Subject: Re: [cdt-dev] How to differenciate a call to a 
> function 
> >> >> fromareferencing its address?
> >> >> Importance: Low
> >> >>
> >> >> Is it also not possible with AST?
> >> >> What if F have some arguments? Can I know what actual
> >> arguments were
> >> >> passed to a function?
> >> >>
> >> >> 2008/10/1 Schorn, Markus <Markus.Schorn@xxxxxxxxxxxxx>:
> >> >> > Currently you cannot tell the difference. If this is
> >> important for
> >> >> > you, please raise an enhancement request on bugzilla.
> >> >> >
> >> >> > Markus.
> >> >> >
> >> >> >> -----Original Message-----
> >> >> >> From: cdt-dev-bounces@xxxxxxxxxxx 
> >> >> >> [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Dmitry 
> >> >> >> Smirnov
> >> >> >> Sent: Wednesday, October 01, 2008 3:59 PM
> >> >> >> To: cdt-dev@xxxxxxxxxxx
> >> >> >> Subject: [cdt-dev] How to differenciate a call to a
> >> function from
> >> >> >> areferencing its address?
> >> >> >> Importance: Low
> >> >> >>
> >> >> >> Hi,
> >> >> >>
> >> >> >> Let's assume I have a function F().
> >> >> >> In the program it can be referenced in this way
> >> >> >>
> >> >> >> void B
> >> >> >> {
> >> >> >>   void * addr = F; // or &F;
> >> >> >> }
> >> >> >>
> >> >> >> How can I differenciate this from the real call to F()
> >> >> using index or
> >> >> >> AST?
> >> >> >>
> >> >> >> Let's assume I have an IIndexName for B.
> >> >> >> I can get the list of enclosed names:
> >> >> >>
> >> >> >> IIndexName funcB = ...
> >> >> >> IIndexName[] refs = funcB.getEnclosedNames(); for(IIndexName
> >> >> >> ref: refs) {
> >> >> >>   IBinding refBinding = index.findBinding(ref);
> >> >> >>   if( refBinding instanceof IFunction )
> >> >> >>   {
> >> >> >>      // How to know that ref is not call?
> >> >> >>   }
> >> >> >> }
> >> >> >>
> >> >> >> Dmitry
> >> >> _______________________________________________
> _______________________________________________
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