/*=============================================================================
|
Copyright (c) 2016 Paul Fultz II
|
function_param_limit.hpp
|
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)
|
==============================================================================*/
|
|
#ifndef BOOST_HOF_GUARD_FUNCTION_PARAM_LIMIT_HPP
|
#define BOOST_HOF_GUARD_FUNCTION_PARAM_LIMIT_HPP
|
|
/// function_param_limit
|
/// ====================
|
///
|
/// Description
|
/// -----------
|
///
|
/// The `function_param_limit` metafunction retrieves the maximum number of
|
/// parameters for a function. For function pointers it returns the number of
|
/// parameters. Everything else, it returns `SIZE_MAX`, but this can be
|
/// changed by annotating the function with the [`limit`](limit) decorator.
|
///
|
/// This is a type trait that inherits from `std::integral_constant`.
|
///
|
/// Synopsis
|
/// --------
|
///
|
/// template<class F>
|
/// struct function_param_limit
|
/// : std::integral_constant<std::size_t, ...>
|
/// {};
|
///
|
/// See Also
|
/// --------
|
///
|
/// * [Partial function evaluation](<Partial function evaluation>)
|
/// * [limit](limit)
|
///
|
|
#include <boost/hof/detail/holder.hpp>
|
#include <type_traits>
|
#include <cstdint>
|
|
namespace boost { namespace hof {
|
|
template<class F, class=void>
|
struct function_param_limit
|
: std::integral_constant<std::size_t, SIZE_MAX>
|
{};
|
|
template<class F>
|
struct function_param_limit<F, typename detail::holder<typename F::fit_function_param_limit>::type>
|
: F::fit_function_param_limit
|
{};
|
|
}} // namespace boost::hof
|
|
#endif
|
