Check member functions signature in compile time

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Is it possible to write c++ template/macros to check whether two functions have the same signatures

Is it possible to write c++ template/macros to check whether two member functions have the same signatures (return type and arguments list) in compile time ?

I want something like this:

CHECK_SIGNATURES(Foo, foo, Bar, bar);

Compilation fails if Foo::foo and Bar::bar functions have deifferent return types or parameters list.

The same question was asked for non-member functions yesterday, the same answer applies. — Marc Glisse, Jan 27 '13 at 14:35
link to duplicate question doesn't solve match question for MEMBER function. Solution to member match is at https://stackoverflow.com/questions/51408881/check-that-signature-of-two-functions-or-member-function-pointer-equal — Reuven Abliyev, Jul 30 '19 at 08:08

score 0 · Answer 1 · edited May 23 '17 at 12:18

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Try the following:

template <class T>
bool same(T, T) { return true; }

template <class T, class U>
bool same(T, U) { return false; }

Or maybe you can use std::is_same like in the answer to the duplicate question.

edited May 23 '17 at 12:18

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answered Jan 27 '13 at 14:35

David G

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@leemes No it checks both -- http://liveworkspace.org/code/4yc7Hy$758 – David G Jan 27 '13 at 14:38
Forget what I said. Just thought the same, thanks for pointing it out anyway. – leemes Jan 27 '13 at 14:39
@MarcGlisse I didn't copy this from anyone... – David G Jan 27 '13 at 14:39
Make it a type trait by making it a class with a `static const bool value`. Or can this version still be used for compile-time expressions (constexpr)? What about C++03? – leemes Jan 27 '13 at 14:41

Check member functions signature in compile time

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