58 lines
1.6 KiB
C++
Executable File
58 lines
1.6 KiB
C++
Executable File
// Copyright 2015, Tobias Hermann and the FunctionalPlus contributors.
|
|
// https://github.com/Dobiasd/FunctionalPlus
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
#pragma once
|
|
|
|
#include <fplus/internal/invoke.hpp>
|
|
#include <fplus/function_traits.hpp>
|
|
|
|
namespace fplus
|
|
{
|
|
namespace internal
|
|
{
|
|
template <typename T, typename...>
|
|
struct function_traits_asserts;
|
|
|
|
template <
|
|
typename,
|
|
typename F,
|
|
typename... Args,
|
|
typename std::enable_if<is_invocable<F, Args...>::value, int>::type = 0>
|
|
constexpr void trigger_static_asserts()
|
|
{
|
|
}
|
|
|
|
// Marks a variable as unused. Prevents the compiler warning
|
|
// for set but unused variables.
|
|
template<class T>
|
|
inline void unused(T&&) { }
|
|
|
|
template <typename Tag,
|
|
typename F,
|
|
typename... Args,
|
|
typename std::enable_if<has_function_traits<F>::value &&
|
|
!is_invocable<F, Args...>::value,
|
|
int>::type = 0>
|
|
constexpr void trigger_static_asserts()
|
|
{
|
|
// don't perform checks if function_traits<F> doesn't exist
|
|
unused(function_traits_asserts<Tag, F, Args...>{});
|
|
}
|
|
|
|
template <typename,
|
|
typename F,
|
|
typename... Args,
|
|
typename std::enable_if<!has_function_traits<F>::value &&
|
|
!is_invocable<F, Args...>::value,
|
|
int>::type = 0>
|
|
constexpr void trigger_static_asserts()
|
|
{
|
|
static_assert(sizeof(F) == 0,
|
|
"F is not a Callable, or its definition is ill-formed");
|
|
}
|
|
}
|
|
}
|