[cfe-dev] How to get the AST of an expression serving as a template argument?

[slycelote via cfe-dev]

For example, in the program below RecursiveASTVisitor sees the template
argument as the integer 6. How to get the actual expression "n+n"?

template<int m>
struct S {
};

const int n = 3;

template<>
struct S<n+n> {
};

int main() {
    S<6> s;
}


-- 
Sly.