template type deduction: comparisons between different template types

Question

I have a templated struct:

template <typename T, typename T2>
struct MyStruct {};

and I want to determine if some type is a "MyStruct" (I don't care what the template parameters are).

template <typename OtherType, typename TestingType, typename = std::enable_if< IsMyStruct<TestingType>::value, TestingType>::type >
struct OtherStruct {};

How do I write IsMyStruct

Answer 1

You can do it like this:

#include <type_traits>

template <typename T>
struct IsMyStruct : std::false_type { };

template <typename T1,typename T2>
struct IsMyStruct<MyStruct<T1,T2> > : std::true_type { };