mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
278 lines
8.7 KiB
C++
278 lines
8.7 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2016 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
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 SPROUT_FUNCTIONAL_MEM_FN_HPP
|
|
#define SPROUT_FUNCTIONAL_MEM_FN_HPP
|
|
|
|
#include <functional>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
#include <sprout/functional/base.hpp>
|
|
#include <sprout/type_traits/identity.hpp>
|
|
|
|
namespace sprout {
|
|
// 20.8.10 member function adaptors
|
|
|
|
namespace detail {
|
|
template<typename Res, typename... Args>
|
|
struct maybe_unary_or_binary_function {};
|
|
template<typename Res, typename T1>
|
|
struct maybe_unary_or_binary_function<Res, T1>
|
|
: public sprout::unary_function<T1, Res>
|
|
{};
|
|
template<typename Res, typename T1, typename T2>
|
|
struct maybe_unary_or_binary_function<Res, T1, T2>
|
|
: public sprout::binary_function<T1, T2, Res>
|
|
{};
|
|
|
|
template<typename T, bool>
|
|
struct mem_fn_const_or_non {
|
|
public:
|
|
typedef T const& type;
|
|
};
|
|
template<typename T>
|
|
struct mem_fn_const_or_non<T, false> {
|
|
public:
|
|
typedef T& type;
|
|
};
|
|
} // namespace detail
|
|
|
|
//
|
|
// mem_fn_adaptor
|
|
//
|
|
template<typename MemberPointer>
|
|
class mem_fn_adaptor;
|
|
template<typename Res, typename Class, typename... Args>
|
|
class mem_fn_adaptor<Res (Class::*)(Args...)>
|
|
: public sprout::detail::maybe_unary_or_binary_function<Res, Class*, Args...>
|
|
{
|
|
public:
|
|
typedef Res result_type;
|
|
private:
|
|
typedef Res (Class::*functor)(Args...);
|
|
private:
|
|
Res (Class::*pmf_)(Args...);
|
|
private:
|
|
template<typename T>
|
|
Res call(T& object, Class const volatile*, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
Res call(T& ptr, void const volatile*, Args... args) const {
|
|
return ((*ptr).*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
public:
|
|
explicit SPROUT_CONSTEXPR mem_fn_adaptor(Res (Class::*pmf)(Args...))
|
|
: pmf_(pmf)
|
|
{}
|
|
Res operator()(Class& object, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
Res operator()(Class* object, Args... args) const {
|
|
return (object->*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
Res operator()(T& object, Args... args) const {
|
|
return call(object, &object, SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
};
|
|
template<typename Res, typename Class, typename... Args>
|
|
class mem_fn_adaptor<Res (Class::*)(Args...) const>
|
|
: public sprout::detail::maybe_unary_or_binary_function<Res, Class const*, Args...>
|
|
{
|
|
public:
|
|
typedef Res result_type;
|
|
private:
|
|
typedef Res (Class::*functor)(Args...) const;
|
|
private:
|
|
Res (Class::*pmf_)(Args...) const;
|
|
private:
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res call(T const& object, Class const volatile*, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res call(T const& ptr, void const volatile*, Args... args) const {
|
|
return ((*ptr).*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
public:
|
|
explicit SPROUT_CONSTEXPR mem_fn_adaptor(Res (Class::*pmf)(Args...) const)
|
|
: pmf_(pmf)
|
|
{}
|
|
SPROUT_CONSTEXPR Res operator()(Class const& object, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
SPROUT_CONSTEXPR Res operator()(Class const* object, Args... args) const {
|
|
return (object->*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res operator()(T const& object, Args... args) const {
|
|
return call(object, &object, SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
};
|
|
template<typename Res, typename Class, typename... Args>
|
|
class mem_fn_adaptor<Res (Class::*)(Args...) volatile>
|
|
: public sprout::detail::maybe_unary_or_binary_function<Res, Class volatile*, Args...>
|
|
{
|
|
public:
|
|
typedef Res result_type;
|
|
private:
|
|
typedef Res (Class::*functor)(Args...) volatile;
|
|
private:
|
|
Res (Class::*pmf_)(Args...) volatile;
|
|
private:
|
|
template<typename T>
|
|
Res call(T& object, Class const volatile*, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
Res call(T& ptr, void const volatile*, Args... args) const {
|
|
return ((*ptr).*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
public:
|
|
explicit SPROUT_CONSTEXPR mem_fn_adaptor(Res (Class::*pmf)(Args...) volatile)
|
|
: pmf_(pmf)
|
|
{}
|
|
Res operator()(Class volatile& object, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
Res operator()(Class volatile* object, Args... args) const {
|
|
return (object->*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
Res operator()(T& object, Args... args) const {
|
|
return call(object, &object, SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
};
|
|
template<typename Res, typename Class, typename... Args>
|
|
class mem_fn_adaptor<Res (Class::*)(Args...) const volatile>
|
|
: public sprout::detail::maybe_unary_or_binary_function<Res, Class const volatile*, Args...>
|
|
{
|
|
public:
|
|
typedef Res result_type;
|
|
private:
|
|
typedef Res (Class::*functor)(Args...) const volatile;
|
|
private:
|
|
Res (Class::*pmf_)(Args...) const volatile;
|
|
private:
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res call(T const& object, Class const volatile*, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res call(T const& ptr, void const volatile*, Args... args) const {
|
|
return ((*ptr).*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
public:
|
|
explicit SPROUT_CONSTEXPR mem_fn_adaptor(Res (Class::*pmf)(Args...) const volatile)
|
|
: pmf_(pmf)
|
|
{}
|
|
SPROUT_CONSTEXPR Res operator()(Class const volatile& object, Args... args) const {
|
|
return (object.*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
SPROUT_CONSTEXPR Res operator()(Class const volatile* object, Args... args) const {
|
|
return (object->*pmf_)(SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR Res operator()(T const& object, Args... args) const {
|
|
return call(object, &object, SPROUT_FORWARD(Args, args)...);
|
|
}
|
|
};
|
|
|
|
template<typename Res, typename Class>
|
|
class mem_fn_adaptor<Res Class::*> {
|
|
private:
|
|
typedef char one;
|
|
struct two { char v[2]; };
|
|
private:
|
|
template<typename T>
|
|
static T& get_ref();
|
|
template<typename T>
|
|
static one check_const(T&, Class*);
|
|
template<typename T, typename Up>
|
|
static one check_const(T&, Up* const*);
|
|
template<typename T, typename Up>
|
|
static two check_const(T&, Up const* const*);
|
|
template<typename T>
|
|
static two check_const(T&, Class const*);
|
|
template<typename T>
|
|
static two check_const(T&, void const volatile*);
|
|
public:
|
|
template<typename T>
|
|
struct result_type
|
|
: public sprout::detail::mem_fn_const_or_non<
|
|
Res,
|
|
(sizeof(two) == sizeof(check_const<T>(get_ref<T>(), typename sprout::identity<T*>::type())))
|
|
>
|
|
{};
|
|
template<typename Signature>
|
|
struct result;
|
|
template<typename CVMem, typename T>
|
|
struct result<CVMem(T)>
|
|
: public result_type<T>
|
|
{};
|
|
template<typename CVMem, typename T>
|
|
struct result<CVMem(T&)>
|
|
: public result_type<T>
|
|
{};
|
|
private:
|
|
Res Class::* pm_;
|
|
private:
|
|
template<typename T>
|
|
Res& call(T& object, Class*) const {
|
|
return object.*pm_;
|
|
}
|
|
template<typename T, typename Up>
|
|
Res& call(T& object, Up* const*) const {
|
|
return (*object).*pm_;
|
|
}
|
|
template<typename T, typename Up>
|
|
const Res& call(T& object, Up const* const*) const {
|
|
return (*object).*pm_;
|
|
}
|
|
template<typename T>
|
|
Res const& call(T& object, Class const*) const {
|
|
return object.*pm_;
|
|
}
|
|
template<typename T>
|
|
const Res& call(T& ptr, void const volatile*) const {
|
|
return (*ptr).*pm_;
|
|
}
|
|
public:
|
|
explicit SPROUT_CONSTEXPR mem_fn_adaptor(Res Class::* pm)
|
|
: pm_(pm)
|
|
{}
|
|
Res& operator()(Class& object) const {
|
|
return object.*pm_;
|
|
}
|
|
SPROUT_CONSTEXPR Res const& operator()(Class const& object) const {
|
|
return object.*pm_;
|
|
}
|
|
Res& operator()(Class* object) const {
|
|
return object->*pm_;
|
|
}
|
|
SPROUT_CONSTEXPR Res const& operator()(Class const* object) const {
|
|
return object->*pm_;
|
|
}
|
|
template<typename T>
|
|
typename result_type<T>::type operator()(T& unknown) const {
|
|
return call(unknown, &unknown);
|
|
}
|
|
};
|
|
|
|
//
|
|
// mem_fn
|
|
//
|
|
template<typename T, typename Class>
|
|
inline SPROUT_CONSTEXPR sprout::mem_fn_adaptor<T Class::*>
|
|
mem_fn(T Class::* pm) {
|
|
return sprout::mem_fn_adaptor<T Class::*>(pm);
|
|
}
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_FUNCTIONAL_MEM_FN_HPP
|