mirror of https://github.com/axmolengine/axmol.git
101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
|
|
/// \file
|
|
// Range v3 library
|
|
//
|
|
// Copyright Eric Niebler 2013-present
|
|
//
|
|
// Use, modification and distribution is subject to 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)
|
|
//
|
|
// Project home: https://github.com/ericniebler/range-v3
|
|
//
|
|
#ifndef RANGES_V3_FUNCTIONAL_INDIRECT_HPP
|
|
#define RANGES_V3_FUNCTIONAL_INDIRECT_HPP
|
|
|
|
#include <utility>
|
|
|
|
#include <concepts/concepts.hpp>
|
|
|
|
#include <range/v3/functional/invoke.hpp>
|
|
#include <range/v3/iterator/traits.hpp>
|
|
#include <range/v3/utility/move.hpp>
|
|
#include <range/v3/utility/static_const.hpp>
|
|
|
|
#include <range/v3/detail/prologue.hpp>
|
|
|
|
namespace ranges
|
|
{
|
|
/// \addtogroup group-functional
|
|
/// @{
|
|
template<typename Fn>
|
|
struct indirected
|
|
{
|
|
private:
|
|
RANGES_NO_UNIQUE_ADDRESS
|
|
Fn fn_;
|
|
|
|
public:
|
|
indirected() = default;
|
|
indirected(Fn fn)
|
|
: fn_(std::move(fn))
|
|
{}
|
|
// value_type (needs no impl)
|
|
template<typename... Its>
|
|
[[noreturn]] invoke_result_t<Fn &, iter_reference_t<Its>...> //
|
|
operator()(copy_tag, Its...) const
|
|
{
|
|
RANGES_EXPECT(false);
|
|
}
|
|
|
|
// Reference
|
|
// clang-format off
|
|
template<typename... Its>
|
|
auto CPP_auto_fun(operator())(Its... its)
|
|
(
|
|
return invoke(fn_, *its...)
|
|
)
|
|
template<typename... Its>
|
|
auto CPP_auto_fun(operator())(Its... its)(const)
|
|
(
|
|
return invoke((Fn const &)fn_, *its...)
|
|
)
|
|
|
|
// Rvalue reference
|
|
template<typename... Its>
|
|
auto CPP_auto_fun(operator())(move_tag, Its... its)
|
|
(
|
|
return static_cast<
|
|
aux::move_t<invoke_result_t<Fn &, iter_reference_t<Its>...>>>(
|
|
aux::move(invoke(fn_, *its...)))
|
|
)
|
|
template<typename... Its>
|
|
auto CPP_auto_fun(operator())(move_tag, Its... its)(const)
|
|
(
|
|
return static_cast<
|
|
aux::move_t<invoke_result_t<Fn const &, iter_reference_t<Its>...>>>(
|
|
aux::move(invoke((Fn const &)fn_, *its...)))
|
|
)
|
|
// clang-format on
|
|
};
|
|
|
|
struct indirect_fn
|
|
{
|
|
template<typename Fn>
|
|
constexpr indirected<Fn> operator()(Fn fn) const
|
|
{
|
|
return indirected<Fn>{detail::move(fn)};
|
|
}
|
|
};
|
|
|
|
/// \ingroup group-functional
|
|
/// \sa `indirect_fn`
|
|
RANGES_INLINE_VARIABLE(indirect_fn, indirect)
|
|
/// @}
|
|
} // namespace ranges
|
|
|
|
#include <range/v3/detail/epilogue.hpp>
|
|
|
|
#endif
|