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

Ok, it is simple. Thanks.
But how can I know that NUMBER was second and not first argument for
macro expansion?



2008/10/15 Schorn, Markus <Markus.Schorn@xxxxxxxxxxxxx>:
> 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
>> >> >> _______________________________________________
>> _______________________________________________
>> cdt-dev mailing list
>> cdt-dev@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/cdt-dev
>>
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