Matcher for templated variable

Clang Frontend Using Clang
1

I’m looking to create AST matchers for variables that are templated. For example, in the code:

template class Class // template <(class or typename or int/float/etc) T>
{
public:

void Func(T* Param) // 1) match Param
{
Param = nullptr; // 2) match Param
}

T* Var = nullptr; // 3) match Var
};

int main()
{
Class MyClass;
float FloatVal;
MyClass.Var = &FloatVal; // 4) match Var
}

Ideally, I’d like one matcher to find each of the 4 matches, but I suspect I need individual matchers for each of them. For the first match above I have varDecl(hasType(templateTypeParmType())), but I haven’t had luck with clang-query in finding the other 3. Any help would be much appreciated!

Thanks,
Robert

2

Hey Robert,

I can highely recommend godbolt.org, it has support for clang-query as additional tool when you select clang as the compiler as well as AST output.

Additionally:

There you get all the possible matchers you can combine. You can check out clang-tidy code for checks do something similar and get inspiration on how to combine matchers, too!