rec/fplus/internal/asserts/composition.hpp
2020-03-18 14:42:46 +08:00

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// 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/function_traits_asserts.hpp>
namespace fplus
{
namespace internal
{
struct bind_1st_of_2_tag
{
};
struct bind_2nd_of_2_tag
{
};
struct bind_1st_of_3_tag
{
};
struct bind_1st_and_2nd_of_3_tag
{
};
struct bind_2nd_and_3rd_of_3_tag
{
};
template <typename F, typename X, typename Y>
struct function_traits_asserts<bind_1st_of_2_tag, F, X, Y>
{
static_assert(utils::function_traits<F>::arity == 2,
"Function must take two parameters.");
typedef typename utils::function_traits<F>::template arg<0>::type FIn0;
typedef typename utils::function_traits<F>::template arg<1>::type FIn1;
static_assert(std::is_convertible<X, FIn0>::value,
"Function can not take bound parameter type");
static_assert(std::is_convertible<Y, FIn1>::value,
"Function can not take provided parameter type");
};
template <typename F, typename X, typename Y>
struct function_traits_asserts<bind_2nd_of_2_tag, F, X, Y>
{
static_assert(utils::function_traits<F>::arity == 2,
"Function must take two parameters.");
typedef typename utils::function_traits<F>::template arg<0>::type FIn0;
typedef typename utils::function_traits<F>::template arg<1>::type FIn1;
static_assert(std::is_convertible<X, FIn0>::value,
"Function can not take provided parameter type");
static_assert(std::is_convertible<Y, FIn1>::value,
"Function can not take bound parameter type");
};
template <typename F, typename X, typename Y, typename Z>
struct function_traits_asserts<bind_1st_of_3_tag, F, X, Y, Z>
{
static_assert(utils::function_traits<F>::arity == 3,
"Function must take three parameters.");
typedef typename utils::function_traits<F>::template arg<0>::type FIn0;
typedef typename utils::function_traits<F>::template arg<1>::type FIn1;
typedef typename utils::function_traits<F>::template arg<2>::type FIn2;
static_assert(std::is_convertible<X, FIn0>::value,
"Function can not take bound parameter type");
static_assert(std::is_convertible<Y, FIn1>::value,
"Function can not take provided first parameter type");
static_assert(std::is_convertible<Z, FIn2>::value,
"Function can not take provided second parameter type");
};
template <typename F, typename X, typename Y, typename Z>
struct function_traits_asserts<bind_1st_and_2nd_of_3_tag, F, X, Y, Z>
{
static_assert(utils::function_traits<F>::arity == 3,
"Function must take three parameters.");
typedef typename utils::function_traits<F>::template arg<0>::type FIn0;
typedef typename utils::function_traits<F>::template arg<1>::type FIn1;
typedef typename utils::function_traits<F>::template arg<2>::type FIn2;
static_assert(std::is_convertible<X, FIn0>::value,
"Function can not take first bound parameter type");
static_assert(std::is_convertible<Y, FIn1>::value,
"Function can not take second bound parameter type");
static_assert(std::is_convertible<Z, FIn2>::value,
"Function can not take provided parameter type");
};
template <typename F, typename X, typename Y, typename Z>
struct function_traits_asserts<bind_2nd_and_3rd_of_3_tag, F, X, Y, Z>
{
static_assert(utils::function_traits<F>::arity == 3,
"Function must take three parameters.");
typedef typename utils::function_traits<F>::template arg<0>::type FIn0;
typedef typename utils::function_traits<F>::template arg<1>::type FIn1;
typedef typename utils::function_traits<F>::template arg<2>::type FIn2;
static_assert(std::is_convertible<X, FIn0>::value,
"Function can not take provided parameter type");
static_assert(std::is_convertible<Y, FIn1>::value,
"Function can not take second bound parameter type");
static_assert(std::is_convertible<Z, FIn2>::value,
"Function can not take first bound parameter type");
};
}
}