[cfe-dev] Question about ASTMatchers

[Manuel Klimek]

On Thu, Feb 20, 2014 at 3:49 PM, Christian Schafmeister <
chris.schaf at verizon.net> wrote:

> Manuel,
>
> I completely missed those predicates - thank you!
>
> How do I get the full name of an instantiated template recordDecl?
>
> As in:
> template <class T> class X;
> class A;
>
> X<A> xa;
>
> If a varDecl(…) matches on xa - how do I get the "X<A>” name?
>

Do you want to "get" it or "match" it. Assuming you want to "get" it, you'd
say something like varDecl(hasType(qualType().bind("t"))) (untested ;), and
then in the callback extract the QualType and call getAsString() on it.


>
> Best,
>
> .Chris.
> Christian Schafmeister
> chris.schaf at verizon.net
>
>
> On Feb 20, 2014, at 12:53 AM, Manuel Klimek <klimek at google.com> wrote:
>
> hasAncestor(decl(anyOf(recordDecl(
>   isTemplateInstantiation()),
>   functionDecl(isTemplateInstantiation()))
>
> should do what you want.
>
>
> On Wed, Feb 19, 2014 at 11:01 PM, Christian Schafmeister <
> chris.schaf at verizon.net> wrote:
>
>>
>> If I match a varDecl() that is in a method of a template class I get a
>> match for the template and instantiated templates
>> - is there a way to tell the difference by matching some difference in
>> the ancestors of the varDecl node?
>>
>> I get a match for the translate::from_object<T> a0(*args);  varDecl in
>> the method activate (see below) that has this type:
>> from_object<type-parameter-0-0, struct std::__1::integral_constant<_Bool,
>> true> >
>>
>> I also get a match that I think is from the instantiation
>> TestFunctoid<int> j(“test”) in tinyFunc - it has this type: "struct
>> translate::from_object<int, std::true_type>"
>>
>> There is a clear difference in the name - but I was looking for something
>> that didn’t feel like a hack.
>>
>> Are there differences in the AST class node for TestFunctoid when it is a
>> template class vs when it is an instantiated template class?
>>
>>
>>
>> #include <stdio.h>
>> #include <core/foundation.h>
>> #include <core/object.h>
>> #include <core/holder.h>
>>
>> namespace asttooling {
>>
>>
>>     template<typename T>
>>     class TestFunctoid : public core::Functoid {
>>     public:
>>
>>         TestFunctoid(const string& name) : core::Functoid(name) {};
>>         core::T_mv activate( core::const_ActivationFrame_spREF
>> closedOverFrame, int numArgs, ArgArray args )
>>         {
>>             translate::from_object<T> a0(*args);
>>             printf( "Address of a0= %p\n", &a0);
>>             return Values0<core::T_O>();
>>         }
>>     };
>>
>>
>>
>>     void tinyFunc()
>>     {
>>         TestFunctoid<int> j("test");
>>         TinyStruct x(10);
>>         tinyFunc(x);
>>         printf("Hi there, this is tinyFunc\n");
>>     }
>>
>> };
>>
>> Christian Schafmeister
>> Associate Professor
>> Chemistry Department
>> Temple University
>>
>>
>
>
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