mirror/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout.git synced 2024-11-29 01:03:45 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions
Sprout/sprout/functional/bind/bind.hpp
bolero-MURAKAMI 0918194078 add sprout::iterator, and update copyright
2017-07-29 14:20:01 +09:00

1036 lines
39 KiB
C++
Raw Blame History

/*=============================================================================
Copyright (c) 2011-2017 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_BIND_BIND_HPP
#define SPROUT_FUNCTIONAL_BIND_BIND_HPP
#include <utility>
#include <tuple>
#include <type_traits>
#include <functional>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/index_tuple/metafunction.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/lvalue_forward.hpp>
#include <sprout/tuple/tuple/tuple.hpp>
#include <sprout/tuple/tuple/get.hpp>
#include <sprout/tuple/tuple/make_tuple.hpp>
#include <sprout/type/algorithm/contains_if.hpp>
#include <sprout/type/algorithm/lower_bound_index.hpp>
#include <sprout/type/type_tuple.hpp>
#include <sprout/type/integral_array.hpp>
#include <sprout/functional/ref.hpp>
#include <sprout/functional/mem_fn.hpp>
#include <sprout/functional/type_traits/weak_result_type.hpp>
#include <sprout/functional/bind/placeholder.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/identity.hpp>
namespace sprout {
// 20.8.9 bind
//
// is_bind_expression
//
template<typename T>
struct is_bind_expression
: public sprout::false_type
{};
template<typename T>
struct is_bind_expression<T const>
: public sprout::is_bind_expression<T>
{};
template<typename T>
struct is_bind_expression<T volatile>
: public sprout::is_bind_expression<T>
{};
template<typename T>
struct is_bind_expression<T const volatile>
: public sprout::is_bind_expression<T>
{};
#if SPROUT_USE_VARIABLE_TEMPLATES
template<typename T>
SPROUT_STATIC_CONSTEXPR bool is_bind_expression_v = sprout::is_bind_expression<T>::value;
#endif // #if SPROUT_USE_VARIABLE_TEMPLATES
namespace detail {
struct no_tuple_element;
template<std::size_t I, typename Tuple, bool IsSafe>
struct safe_tuple_element_impl
: tuple_element<I, Tuple>
{};
template<std::size_t I, typename Tuple>
struct safe_tuple_element_impl<I, Tuple, false> {
public:
typedef sprout::detail::no_tuple_element type;
};
template<std::size_t I, typename Tuple>
struct safe_tuple_element
: public sprout::detail::safe_tuple_element_impl<I, Tuple, (I < sprout::tuples::tuple_size<Tuple>::value)>
{};
template<
typename Arg,
bool IsBindExp = sprout::is_bind_expression<Arg>::value,
bool IsPlaceholder = (sprout::is_placeholder<Arg>::value > 0)
>
class mu;
template<typename T>
class mu<sprout::reference_wrapper<T>, false, false> {
public:
typedef T& result_type;
public:
template<typename CVRef, typename Tuple>
SPROUT_CONSTEXPR result_type operator()(CVRef& arg, Tuple&) const volatile {
return const_cast<typename std::remove_volatile<typename std::remove_reference<CVRef>::type>::type&>(arg).get();
}
};
template<typename T>
class mu<std::reference_wrapper<T>, false, false> {
public:
typedef T& result_type;
public:
template<typename CVRef, typename Tuple>
SPROUT_CONSTEXPR result_type operator()(CVRef& arg, Tuple&) const volatile {
return const_cast<typename std::remove_volatile<typename std::remove_reference<CVRef>::type>::type&>(arg).get();
}
};
template<typename Arg>
class mu<Arg, true, false> {
private:
template<typename CVArg, typename... Args, sprout::index_t... Indexes>
SPROUT_CONSTEXPR auto call(
CVArg& arg,
sprout::tuples::tuple<Args...>& tuple,
sprout::index_tuple<Indexes...>
) const volatile
-> decltype(arg(std::declval<Args>()...))
{
return arg(SPROUT_FORWARD(Args, sprout::tuples::get<Indexes>(tuple))...);
}
public:
template<typename CVArg, typename... Args>
SPROUT_CONSTEXPR auto operator()(CVArg& arg, sprout::tuples::tuple<Args...>& tuple) const volatile
-> decltype(arg(std::declval<Args>()...))
{
return call(arg, tuple, sprout::index_pack<Args...>::make());
}
};
template<typename Arg>
class mu<Arg, false, true> {
public:
template<typename Signature>
class result;
template<typename CVMu, typename CVArg, typename Tuple>
class result<CVMu (CVArg, Tuple)> {
private:
typedef typename sprout::detail::safe_tuple_element<
(sprout::is_placeholder<Arg>::value - 1),
Tuple
>::type base_type;
public:
typedef typename std::add_rvalue_reference<base_type>::type type;
};
public:
template<typename Tuple>
typename result<mu (Arg, Tuple)>::type
SPROUT_CONSTEXPR operator()(Arg /*const volatile&*/, Tuple& tuple) const volatile {
typedef typename result<mu (Arg, Tuple)>::type type;
return SPROUT_FORWARD(type, sprout::tuples::get<(sprout::is_placeholder<Arg>::value - 1)>(tuple));
}
};
template<typename Arg>
class mu<Arg, false, false> {
public:
template<typename Signature>
struct result;
template<typename CVMu, typename CVArg, typename Tuple>
struct result<CVMu (CVArg, Tuple)> {
public:
typedef typename std::add_lvalue_reference<CVArg>::type type;
};
public:
template<typename CVArg, typename Tuple>
SPROUT_CONSTEXPR CVArg&& operator()(CVArg&& arg, Tuple&) const volatile {
return SPROUT_FORWARD(CVArg, arg);
}
};
template<typename T>
struct maybe_wrap_member_pointer {
public:
typedef T type;
public:
static SPROUT_CONSTEXPR T const& do_wrap(T const& x) {
return x;
}
static SPROUT_CONSTEXPR T&& do_wrap(T&& x) {
return static_cast<T&&>(x);
}
};
template<typename T, typename Class>
struct maybe_wrap_member_pointer<T Class::*> {
public:
typedef sprout::mem_fn_adaptor<T Class::*> type;
public:
static SPROUT_CONSTEXPR type do_wrap(T Class::* pm) {
return type(pm);
}
};
template<>
struct maybe_wrap_member_pointer<void> {
public:
typedef void type;
};
template<std::size_t I, typename... Types>
inline SPROUT_CONSTEXPR auto volget(sprout::tuples::tuple<Types...> volatile& tuple)
-> typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type volatile&
{
return sprout::tuples::get<I>(const_cast<sprout::tuples::tuple<Types...>&>(tuple));
}
template<std::size_t I, typename... Types>
inline SPROUT_CONSTEXPR auto volget(sprout::tuples::tuple<Types...> const volatile& tuple)
-> typename sprout::tuples::tuple_element<I, sprout::tuples::tuple<Types...> >::type const volatile&
{
return sprout::tuples::get<I>(const_cast<sprout::tuples::tuple<Types...> const&>(tuple));
}
struct is_variadic_placeholder_pred {
public:
template<typename T>
struct apply
: public sprout::bool_constant<
(sprout::is_variadic_placeholder<T>::value > 0)
>
{};
};
template<typename Bounds, typename = void>
struct is_variadic_bounds
: public sprout::bool_constant<
sprout::types::contains_if<Bounds, sprout::detail::is_variadic_placeholder_pred>::value
>
{};
template<typename T>
struct tail_place
: public sprout::integral_constant<int, sprout::is_variadic_placeholder<T>::value - 1>
{};
template<typename T, std::size_t ArgSize, typename = void>
struct bound_size
: public sprout::integral_constant<std::size_t, 1>
{};
template<typename T, std::size_t ArgSize>
struct bound_size<
T, ArgSize,
typename std::enable_if<(sprout::is_variadic_placeholder<T>::value > 0)>::type
>
: public sprout::integral_constant<
std::size_t,
(ArgSize - sprout::detail::tail_place<T>::value)
>
{};
template<std::size_t I, typename Bounds, std::size_t ArgSize, typename = void>
struct bounds_size_impl
: public sprout::integral_constant<std::size_t, 0>
{};
template<std::size_t I, typename Bounds, std::size_t ArgSize>
struct bounds_size_impl<
I, Bounds, ArgSize,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public sprout::integral_constant<
std::size_t,
(sprout::detail::bound_size<typename sprout::tuples::tuple_element<I, Bounds>::type, ArgSize>::value
+ sprout::detail::bounds_size_impl<I + 1, Bounds, ArgSize>::value
)
>
{};
template<typename Bounds, std::size_t ArgSize>
struct bounds_size
: public sprout::detail::bounds_size_impl<0, Bounds, ArgSize>
{};
template<std::size_t I, typename Bounds, std::size_t ArgSize, std::size_t Current, typename Seq, typename = void>
struct bounds_partial_size_impl {
public:
typedef Seq type;
};
template<std::size_t I, typename Bounds, std::size_t ArgSize, std::size_t Current, std::size_t... Elems>
struct bounds_partial_size_impl<
I, Bounds, ArgSize, Current, sprout::types::integral_array<std::size_t, Elems...>,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public sprout::detail::bounds_partial_size_impl<
I + 1, Bounds, ArgSize,
Current + sprout::detail::bound_size<typename sprout::tuples::tuple_element<I, Bounds>::type, ArgSize>::value,
sprout::types::integral_array<std::size_t, Elems..., Current>
>
{};
template<typename Bounds, std::size_t ArgSize>
struct bounds_partial_size
: public sprout::detail::bounds_partial_size_impl<0, Bounds, ArgSize, 0, sprout::types::integral_array<std::size_t> >
{};
template<typename Bounds, std::size_t ArgSize>
struct bound_indexes
: public sprout::make_index_tuple<sprout::detail::bounds_size<Bounds, ArgSize>::value>
{};
template<sprout::index_t I, typename Bounds, std::size_t ArgSize>
struct bound_position
: public sprout::integral_constant<
sprout::index_t,
(sprout::types::lower_bound_index<
typename sprout::detail::bounds_partial_size<Bounds, ArgSize>::type,
sprout::integral_constant<std::size_t, I + 1>
>::type::value - 1
)
>
{};
template<sprout::index_t I, typename Bounds, std::size_t ArgSize>
struct is_variadic_part
: public sprout::bool_constant<
(sprout::is_variadic_placeholder<
typename sprout::tuples::tuple_element<
sprout::detail::bound_position<I, Bounds, ArgSize>::value,
Bounds
>::type
>::value > 0
)
>
{};
template<sprout::index_t I, typename Bounds, std::size_t ArgSize, sprout::index_t BoundPos, typename SizeSeq, typename = void>
struct bound_element_impl
: public sprout::tuples::tuple_element<BoundPos, Bounds>
{};
template<sprout::index_t I, typename Bounds, std::size_t ArgSize, sprout::index_t BoundPos, typename SizeSeq>
struct bound_element_impl<
I, Bounds, ArgSize, BoundPos, SizeSeq,
typename std::enable_if<sprout::detail::is_variadic_part<I, Bounds, ArgSize>::value>::type
> {
public:
typedef sprout::placeholder<
(I + 1
- sprout::tuples::tuple_element<BoundPos, SizeSeq>::type::value
+ sprout::detail::tail_place<typename sprout::tuples::tuple_element<BoundPos, Bounds>::type>::value
)
> type;
};
template<sprout::index_t I, typename Bounds, std::size_t ArgSize>
struct bound_element
: public sprout::detail::bound_element_impl<
I, Bounds, ArgSize, sprout::detail::bound_position<I, Bounds, ArgSize>::value,
typename sprout::detail::bounds_partial_size<Bounds, ArgSize>::type
>
{};
struct get_bound_helper {
public:
template<
sprout::index_t I, typename Bounds,
typename sprout::enabler_if<!std::is_const<Bounds>::value && !std::is_volatile<Bounds>::value>::type = sprout::enabler
>
static SPROUT_CONSTEXPR auto
get_bound(Bounds& bound_args)
-> decltype(sprout::tuples::get<I>(bound_args))
{
return sprout::tuples::get<I>(bound_args);
}
template<
sprout::index_t I, typename Bounds,
typename sprout::enabler_if<std::is_const<Bounds const>::value && !std::is_volatile<Bounds const>::value>::type = sprout::enabler
>
static SPROUT_CONSTEXPR auto
get_bound(Bounds const& bound_args)
-> decltype(sprout::tuples::get<I>(bound_args))
{
return sprout::tuples::get<I>(bound_args);
}
template<
sprout::index_t I, typename Bounds,
typename sprout::enabler_if<!std::is_const<Bounds volatile>::value && std::is_volatile<Bounds volatile>::value>::type = sprout::enabler
>
static SPROUT_CONSTEXPR auto
get_bound(Bounds volatile& bound_args)
-> decltype(sprout::detail::volget<I>(bound_args))
{
return sprout::detail::volget<I>(bound_args);
}
template<
sprout::index_t I, typename Bounds,
typename sprout::enabler_if<std::is_const<Bounds const volatile>::value && std::is_volatile<Bounds const volatile>::value>::type = sprout::enabler
>
static SPROUT_CONSTEXPR auto
get_bound(Bounds const volatile& bound_args)
-> decltype(sprout::detail::volget<I>(bound_args))
{
return sprout::detail::volget<I>(bound_args);
}
};
template<
sprout::index_t I, std::size_t ArgSize, typename Bounds,
typename sprout::enabler_if<sprout::detail::is_variadic_part<I, typename std::remove_reference<Bounds>::type, ArgSize>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR typename sprout::detail::bound_element<I, typename std::remove_reference<Bounds>::type, ArgSize>::type
get_bound(Bounds&&) {
typedef typename sprout::detail::bound_element<I, typename std::remove_reference<Bounds>::type, ArgSize>::type type;
return type();
}
template<
sprout::index_t I, std::size_t ArgSize, typename Bounds,
typename sprout::enabler_if<!sprout::detail::is_variadic_part<I, typename std::remove_reference<Bounds>::type, ArgSize>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR auto
get_bound(Bounds&& bound_args)
-> decltype(
sprout::detail::get_bound_helper::get_bound<
sprout::detail::bound_position<I, typename std::remove_reference<Bounds>::type, ArgSize>::value
>(SPROUT_FORWARD(Bounds, bound_args))
)
{
return sprout::detail::get_bound_helper::get_bound<
sprout::detail::bound_position<I, typename std::remove_reference<Bounds>::type, ArgSize>::value
>(SPROUT_FORWARD(Bounds, bound_args));
}
} // namespace detail
namespace detail {
template<typename Signature>
class binder_impl;
template<typename Functor, typename... BoundArgs>
class binder_impl<Functor(BoundArgs...)>
: public sprout::weak_result_type<Functor>
{
protected:
typedef sprout::tuples::tuple<BoundArgs...> bounds_type;
private:
Functor f_;
bounds_type bound_args_;
protected:
template<typename Result, typename... Args, sprout::index_t... Indexes>
Result call(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>) {
return f_(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...
);
}
template<typename Result, typename... Args, sprout::index_t... Indexes>
SPROUT_CONSTEXPR Result call_c(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>) const {
return f_(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type const>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...
);
}
template<typename Result, typename... Args, sprout::index_t... Indexes>
Result call_v(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>) volatile {
return f_(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type volatile>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...
);
}
template<typename Result, typename... Args, sprout::index_t... Indexes>
SPROUT_CONSTEXPR Result call_cv(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>) const volatile {
return f_(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type const volatile>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...
);
}
public:
template<
typename... Args, sprout::index_t... Indexes
>
static decltype(
std::declval<Functor&>()(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(std::declval<bounds_type&>()), std::declval<sprout::tuples::tuple<Args...>&>())...
)
)
call_(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>);
template<
typename... Args, sprout::index_t... Indexes
>
static decltype(
std::declval<typename std::enable_if<(sizeof...(Args) >= 0), typename std::add_const<Functor>::type>::type&>()(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type const>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(std::declval<bounds_type const&>()), std::declval<sprout::tuples::tuple<Args...>&>())...
)
)
call_c_(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>);
template<
typename... Args, sprout::index_t... Indexes
>
static decltype(
std::declval<typename std::enable_if<(sizeof...(Args) >= 0), typename std::add_volatile<Functor>::type>::type&>()(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type volatile>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(std::declval<bounds_type volatile&>()), std::declval<sprout::tuples::tuple<Args...>&>())...
)
)
call_v_(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>);
template<
typename... Args, sprout::index_t... Indexes
>
static decltype(
std::declval<typename std::enable_if<(sizeof...(Args) >= 0), typename std::add_cv<Functor>::type>::type&>()(
sprout::detail::mu<typename sprout::detail::bound_element<Indexes, bounds_type, sizeof...(Args)>::type const volatile>()
(sprout::detail::get_bound<Indexes, sizeof...(Args)>(std::declval<bounds_type const volatile&>()), std::declval<sprout::tuples::tuple<Args...>&>())...
)
)
call_cv_(sprout::tuples::tuple<Args...>&& args, sprout::index_tuple<Indexes...>);
public:
template<typename... Args>
explicit SPROUT_CONSTEXPR binder_impl(Functor const& f, Args&&... args)
: f_(f)
, bound_args_(SPROUT_FORWARD(Args, args)...)
{}
binder_impl(binder_impl const&) = default;
};
} // namespace detail
//
// binder
//
template<typename Signature>
class binder;
template<typename Functor, typename... BoundArgs>
class binder<Functor(BoundArgs...)>
: private sprout::detail::binder_impl<Functor(BoundArgs...)>
{
private:
typedef sprout::detail::binder_impl<Functor(BoundArgs...)> impl_type;
typedef typename impl_type::bounds_type bounds_type;
public:
template<typename... Args>
explicit SPROUT_CONSTEXPR binder(Functor const& f, Args&&... args)
: impl_type(f, SPROUT_FORWARD(Args, args)...)
{}
binder(binder const&) = default;
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
Result operator()(Args&&... args) {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_c_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
SPROUT_CONSTEXPR Result operator()(Args&&... args) const {
return impl_type::template call_c<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_v_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
Result operator()(Args&&... args) volatile {
return impl_type::template call_v<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_cv_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
SPROUT_CONSTEXPR Result operator()(Args&&... args) const volatile {
return impl_type::template call_cv<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
};
//
// cbinder
//
template<typename Signature>
class cbinder;
template<typename Functor, typename... BoundArgs>
class cbinder<Functor(BoundArgs...)>
: private sprout::detail::binder_impl<Functor(BoundArgs...)>
{
private:
typedef sprout::detail::binder_impl<Functor(BoundArgs...)> impl_type;
typedef typename impl_type::bounds_type bounds_type;
public:
template<typename... Args>
explicit SPROUT_CONSTEXPR cbinder(Functor const& f, Args&&... args)
: impl_type(f, SPROUT_FORWARD(Args, args)...)
{}
cbinder(cbinder const&) = default;
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_c_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
SPROUT_CONSTEXPR Result operator()(Args&&... args) const {
return impl_type::template call_c<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<
typename... Args,
typename Result = typename sprout::identity<decltype(
impl_type::template call_cv_(std::declval<sprout::tuples::tuple<Args...> >(), sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make())
)>::type
>
SPROUT_CONSTEXPR Result operator()(Args&&... args) const volatile {
return impl_type::template call_cv<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
};
namespace detail {
template<typename Result, typename Signature>
class res_binder_impl;
template<typename Result, typename Functor, typename... BoundArgs>
class res_binder_impl<Result, Functor(BoundArgs...)> {
public:
typedef Result result_type;
protected:
typedef sprout::tuples::tuple<BoundArgs...> bounds_type;
private:
template<typename Res>
struct enable_if_void
: public std::enable_if<std::is_void<Res>::value, int>
{};
template<typename Res>
struct disable_if_void
: public std::enable_if<!std::is_void<Res>::value, int>
{};
private:
Functor f_;
sprout::tuples::tuple<BoundArgs...> bound_args_;
protected:
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename disable_if_void<Res>::type = 0
)
{
return f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename enable_if_void<Res>::type = 0
)
{
f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
SPROUT_CONSTEXPR Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename disable_if_void<Res>::type = 0
) const
{
return f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename enable_if_void<Res>::type = 0
) const
{
f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename disable_if_void<Res>::type = 0
) volatile
{
return f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename enable_if_void<Res>::type = 0
) volatile
{
f_(sprout::detail::mu<BoundArgs, Indexes>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
SPROUT_CONSTEXPR Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename disable_if_void<Res>::type = 0
) const volatile
{
return f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
template<typename Res, typename... Args, sprout::index_t... Indexes>
Result call(
sprout::tuples::tuple<Args...>&& args,
sprout::index_tuple<Indexes...>,
typename enable_if_void<Res>::type = 0
) const volatile
{
f_(sprout::detail::mu<BoundArgs>()(sprout::detail::get_bound<Indexes, sizeof...(Args)>(bound_args_), args)...);
}
public:
template<typename... Args>
explicit SPROUT_CONSTEXPR res_binder_impl(Functor const& f, Args&&... args)
: f_(f)
, bound_args_(SPROUT_FORWARD(Args, args)...)
{}
res_binder_impl(res_binder_impl const&) = default;
};
} // namespace detail
//
// res_binder
//
template<typename Result, typename Signature>
class res_binder;
template<typename Result, typename Functor, typename... BoundArgs>
class res_binder<Result, Functor(BoundArgs...)>
: private sprout::detail::res_binder_impl<Result, Functor(BoundArgs...)>
{
public:
typedef Result result_type;
private:
typedef sprout::detail::res_binder_impl<Result, Functor(BoundArgs...)> impl_type;
typedef typename impl_type::bounds_type bounds_type;
public:
template<typename... Args>
explicit res_binder(Functor const& f, Args&&... args)
: impl_type(f, SPROUT_FORWARD(Args, args)...)
{}
res_binder(res_binder const&) = default;
template<typename... Args>
result_type operator()(Args&&... args) {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<typename... Args>
SPROUT_CONSTEXPR result_type operator()(Args&&... args) const {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<typename... Args>
result_type operator()(Args&&... args) volatile {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<typename... Args>
SPROUT_CONSTEXPR result_type operator()(Args&&... args) const volatile {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
};
//
// res_cbinder
//
template<typename Result, typename Signature>
class res_cbinder;
template<typename Result, typename Functor, typename... BoundArgs>
class res_cbinder<Result, Functor(BoundArgs...)>
: private sprout::detail::res_binder_impl<Result, Functor(BoundArgs...)>
{
public:
typedef Result result_type;
private:
typedef sprout::detail::res_binder_impl<Result, Functor(BoundArgs...)> impl_type;
typedef typename impl_type::bounds_type bounds_type;
public:
template<typename... Args>
explicit SPROUT_CONSTEXPR res_cbinder(Functor const& f, Args&&... args)
: impl_type(f, SPROUT_FORWARD(Args, args)...)
{}
res_cbinder(res_cbinder const&) = default;
template<typename... Args>
SPROUT_CONSTEXPR result_type operator()(Args&&... args) const {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
template<typename... Args>
SPROUT_CONSTEXPR result_type operator()(Args&&... args) const volatile {
return impl_type::template call<Result>(
sprout::tuples::forward_as_tuple(SPROUT_FORWARD(Args, args)...),
sprout::detail::bound_indexes<bounds_type, sizeof...(Args)>::make()
);
}
};
//
// is_bind_expression
//
template<typename Signature>
struct is_bind_expression<sprout::binder<Signature> >
: public sprout::true_type
{};
template<typename Result, typename Signature>
struct is_bind_expression<sprout::res_binder<Result, Signature> >
: public sprout::true_type
{};
template<typename Signature>
struct is_bind_expression<sprout::cbinder<Signature> >
: public sprout::true_type
{};
template<typename Result, typename Signature>
struct is_bind_expression<sprout::res_cbinder<Result, Signature> >
: public sprout::true_type
{};
namespace detail {
template<std::size_t N, typename BoundArg, typename = void>
struct complete_placeholder {
public:
typedef BoundArg type;
};
template<std::size_t N, typename BoundArg>
struct complete_placeholder<
N, BoundArg,
typename std::enable_if<sprout::is_positional_placeholder<BoundArg>::value>::type
> {
public:
typedef sprout::placeholder<N + 1> type;
};
template<std::size_t I, std::size_t N, typename Bounds, typename Binder, typename = void>
struct binder_complete_placeholders_impl {
public:
typedef Binder type;
};
template<std::size_t I, std::size_t N, typename Bounds, typename Func, typename... As>
struct binder_complete_placeholders_impl<
I, N, Bounds, sprout::binder<Func (As...)>,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public std::conditional<
sprout::is_positional_placeholder<typename sprout::tuples::tuple_element<I, Bounds>::type>::value,
sprout::detail::binder_complete_placeholders_impl<
I + 1, N + 1, Bounds,
sprout::binder<Func (As..., sprout::placeholder<N + 1>)>
>,
sprout::detail::binder_complete_placeholders_impl<
I + 1, N, Bounds,
sprout::binder<Func (As..., typename sprout::tuples::tuple_element<I, Bounds>::type)>
>
>::type
{};
template<std::size_t I, std::size_t N, typename Bounds, typename Func, typename... As>
struct binder_complete_placeholders_impl<
I, N, Bounds, sprout::cbinder<Func (As...)>,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public std::conditional<
sprout::is_positional_placeholder<typename sprout::tuples::tuple_element<I, Bounds>::type>::value,
sprout::detail::binder_complete_placeholders_impl<
I + 1, N + 1, Bounds,
sprout::cbinder<Func (As..., sprout::placeholder<N + 1>)>
>,
sprout::detail::binder_complete_placeholders_impl<
I + 1, N, Bounds,
sprout::cbinder<Func (As..., typename sprout::tuples::tuple_element<I, Bounds>::type)>
>
>::type
{};
template<bool Const, typename Func, typename... BoundArgs>
struct binder_complete_placeholders;
template<typename Func, typename... BoundArgs>
struct binder_complete_placeholders<
false, Func, BoundArgs...
>
: public sprout::detail::binder_complete_placeholders_impl<
0, 0, sprout::types::type_tuple<BoundArgs...>, sprout::binder<Func ()>
>
{};
template<typename Func, typename... BoundArgs>
struct binder_complete_placeholders<
true, Func, BoundArgs...
>
: public sprout::detail::binder_complete_placeholders_impl<
0, 0, sprout::types::type_tuple<BoundArgs...>, sprout::cbinder<Func ()>
>
{};
template<std::size_t I, std::size_t N, typename Bounds, typename Binder, typename = void>
struct res_binder_complete_placeholders_impl {
public:
typedef Binder type;
};
template<std::size_t I, std::size_t N, typename Bounds, typename Result, typename Func, typename... As>
struct res_binder_complete_placeholders_impl<
I, N, Bounds, sprout::res_binder<Result, Func (As...)>,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public std::conditional<
sprout::is_positional_placeholder<typename sprout::tuples::tuple_element<I, Bounds>::type>::value,
sprout::detail::res_binder_complete_placeholders_impl<
I + 1, N + 1, Bounds,
sprout::res_binder<Result, Func (As..., sprout::placeholder<N + 1>)>
>,
sprout::detail::res_binder_complete_placeholders_impl<
I + 1, N, Bounds,
sprout::res_binder<Result, Func (As..., typename sprout::tuples::tuple_element<I, Bounds>::type)>
>
>::type
{};
template<std::size_t I, std::size_t N, typename Bounds, typename Result, typename Func, typename... As>
struct res_binder_complete_placeholders_impl<
I, N, Bounds, sprout::res_cbinder<Result, Func (As...)>,
typename std::enable_if<(I < sprout::tuples::tuple_size<Bounds>::value)>::type
>
: public std::conditional<
sprout::is_positional_placeholder<typename sprout::tuples::tuple_element<I, Bounds>::type>::value,
sprout::detail::res_binder_complete_placeholders_impl<
I + 1, N + 1, Bounds,
sprout::res_cbinder<Result, Func (As..., sprout::placeholder<N + 1>)>
>,
sprout::detail::res_binder_complete_placeholders_impl<
I + 1, N, Bounds,
sprout::res_cbinder<Result, Func (As..., typename sprout::tuples::tuple_element<I, Bounds>::type)>
>
>::type
{};
template<bool Const, typename Result, typename Func, typename... BoundArgs>
struct res_binder_complete_placeholders;
template<typename Result, typename Func, typename... BoundArgs>
struct res_binder_complete_placeholders<
false, Result, Func, BoundArgs...
>
: public sprout::detail::res_binder_complete_placeholders_impl<
0, 0, sprout::types::type_tuple<BoundArgs...>, sprout::res_binder<Result, Func ()>
>
{};
template<typename Result, typename Func, typename... BoundArgs>
struct res_binder_complete_placeholders<
true, Result, Func, BoundArgs...
>
: public sprout::detail::res_binder_complete_placeholders_impl<
0, 0, sprout::types::type_tuple<BoundArgs...>, sprout::res_cbinder<Result, Func ()>
>
{};
template<bool Const, typename Func, typename... BoundArgs>
struct bind_helper {
public:
typedef sprout::detail::maybe_wrap_member_pointer<typename std::decay<Func>::type> maybe_type;
typedef typename maybe_type::type func_type;
typedef typename sprout::detail::binder_complete_placeholders<Const, func_type, typename std::decay<BoundArgs>::type...>::type type;
};
template<bool Const, typename Result, typename Func, typename... BoundArgs>
struct res_bind_helper {
public:
typedef sprout::detail::maybe_wrap_member_pointer<typename std::decay<Func>::type> maybe_type;
typedef typename maybe_type::type functor_type;
typedef typename sprout::detail::res_binder_complete_placeholders<Const, Result, functor_type, typename std::decay<BoundArgs>::type...>::type type;
};
} // namespace detail
//
// bind_result
// cbind_result
//
template<typename F, typename... BoundArgs>
struct bind_result {
public:
typedef typename sprout::detail::bind_helper<false, F, BoundArgs...>::type type;
};
template<typename F, typename... BoundArgs>
struct cbind_result {
public:
typedef typename sprout::detail::bind_helper<true, F, BoundArgs...>::type type;
};
//
// res_bind_result
// res_cbind_result
//
template<typename R, typename F, typename... BoundArgs>
struct res_bind_result {
public:
typedef typename sprout::detail::res_bind_helper<false, R, F, BoundArgs...>::type type;
};
template<typename R, typename F, typename... BoundArgs>
struct res_cbind_result {
public:
typedef typename sprout::detail::res_bind_helper<true, R, F, BoundArgs...>::type type;
};
//
// bind
//
template<typename F, typename... BoundArgs>
inline SPROUT_CONSTEXPR typename sprout::bind_result<F, BoundArgs...>::type
bind(F&& f, BoundArgs&&... args) {
typedef sprout::detail::bind_helper<false, F, BoundArgs...> helper_type;
typedef typename helper_type::maybe_type maybe_type;
typedef typename helper_type::type result_type;
return result_type(maybe_type::do_wrap(SPROUT_FORWARD(F, f)), SPROUT_FORWARD(BoundArgs, args)...);
}
template<typename R, typename F, typename... BoundArgs>
inline SPROUT_CONSTEXPR typename sprout::res_bind_result<R, F, BoundArgs...>::type
bind(F&& f, BoundArgs&&... args) {
typedef sprout::detail::res_bind_helper<false, R, F, BoundArgs...> helper_type;
typedef typename helper_type::maybe_type maybe_type;
typedef typename helper_type::type result_type;
return result_type(maybe_type::do_wrap(SPROUT_FORWARD(F, f)), SPROUT_FORWARD(BoundArgs, args)...);
}
//
// cbind
//
template<typename F, typename... BoundArgs>
inline SPROUT_CONSTEXPR typename sprout::cbind_result<F, BoundArgs...>::type
cbind(F&& f, BoundArgs&&... args) {
typedef sprout::detail::bind_helper<true, F, BoundArgs...> helper_type;
typedef typename helper_type::maybe_type maybe_type;
typedef typename helper_type::type result_type;
return result_type(maybe_type::do_wrap(SPROUT_FORWARD(F, f)), SPROUT_FORWARD(BoundArgs, args)...);
}
template<typename R, typename F, typename... BoundArgs>
inline SPROUT_CONSTEXPR typename sprout::res_cbind_result<R, F, BoundArgs...>::type
cbind(F&& f, BoundArgs&&... args) {
typedef sprout::detail::res_bind_helper<true, R, F, BoundArgs...> helper_type;
typedef typename helper_type::maybe_type maybe_type;
typedef typename helper_type::type result_type;
return result_type(maybe_type::do_wrap(SPROUT_FORWARD(F, f)), SPROUT_FORWARD(BoundArgs, args)...);
}
} // namespace sprout
#endif // #ifndef SPROUT_FUNCTIONAL_BIND_BIND_HPP
Reference in a new issue View git blame Copy permalink