mirror of
https://github.com/boostorg/callable_traits.git
synced 2026-02-11 11:42:15 +00:00
37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
|
|
/*!<-
|
|
Copyright (c) 2016 Barrett Adair
|
|
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
|
|
->*/
|
|
|
|
//[ can_invoke_constexpr_member_function_pointer
|
|
#include <type_traits>
|
|
#include <callable_traits/callable_traits.hpp>
|
|
|
|
// NOTE: Due to non-compliance in MSVC, can_invoke_constexpr
|
|
// always returns std::false_type on that compiler, which
|
|
// causes a static assert below to fail.
|
|
|
|
namespace ct = callable_traits;
|
|
|
|
struct foo {
|
|
constexpr int bar(int) const {
|
|
return 1;
|
|
}
|
|
};
|
|
|
|
using pmf_constant = std::integral_constant<decltype(&foo::bar), &foo::bar>;
|
|
|
|
// can_invoke_constexpr returns true here because foo::bar
|
|
// is constexpr, and the arguments are valid to INVOKE
|
|
static_assert(ct::can_invoke_constexpr(pmf_constant{}, foo{}, 0), "");
|
|
|
|
// can_invoke_constexpr returns false here because even though
|
|
// foo::bar is constexpr, the arguments do not obey INVOKE rules
|
|
static_assert(!ct::can_invoke_constexpr(pmf_constant{}, foo{}), "");
|
|
|
|
int main() {}
|
|
//]
|