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feat update invoke_result
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This commit is contained in:
tqcq 2024-06-07 09:04:05 +08:00
parent 778d24b8de
commit 5f299117fe
1 changed files with 181 additions and 152 deletions
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163
src/sled/exec/detail/invoke_result.h
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@ -18,13 +18,15 @@ namespace detail {
#define EGGS_FWD(...) static_cast<decltype(__VA_ARGS__) &&>(__VA_ARGS__)
///////////////////////////////////////////////////////////////////////////
template<typename C, typename T, bool Ref, bool RefWrapper, bool IsFunction = std::is_function<T>::value>
template <typename C, typename T, bool Ref, bool RefWrapper,
bool IsFunction = std::is_function<T>::value>
struct invoke_mem_ptr;
// when `pm` is a pointer to member of a class `C` and
// `is_base_of_v<C, remove_reference_t<T>>` is `true`;
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false, /*IsFunction=*/false> {
struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false,
/*IsFunction=*/false> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -32,14 +34,15 @@ struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false, /*IsFunction=*/f
#endif
template <typename T1>
constexpr auto operator()(T1 &&t1) const noexcept(noexcept(EGGS_FWD(t1).*pm)) -> decltype(EGGS_FWD(t1).*pm)
{
constexpr auto operator()(T1 &&t1) const
noexcept(noexcept(EGGS_FWD(t1).*pm)) -> decltype(EGGS_FWD(t1).*pm) {
return EGGS_FWD(t1).*pm;
}
};
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false, /*IsFunction=*/true> {
struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false,
/*IsFunction=*/true> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -47,9 +50,9 @@ struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false, /*IsFunction=*/t
#endif
template <typename T1, typename... Tn>
constexpr auto operator()(T1 &&t1, Tn &&...tn) const noexcept(noexcept((EGGS_FWD(t1).*pm)(EGGS_FWD(tn)...)))
-> decltype((EGGS_FWD(t1).*pm)(EGGS_FWD(tn)...))
{
constexpr auto operator()(T1 &&t1, Tn &&...tn) const
noexcept(noexcept((EGGS_FWD(t1).*pm)(EGGS_FWD(tn)...)))
-> decltype((EGGS_FWD(t1).*pm)(EGGS_FWD(tn)...)) {
return (EGGS_FWD(t1).*pm)(EGGS_FWD(tn)...);
}
};
@ -57,7 +60,8 @@ struct invoke_mem_ptr<C, T, /*Ref=*/true, /*RefWrapper=*/false, /*IsFunction=*/t
// when `pm` is a pointer to member of a class `C` and
// `remove_cvref_t<T>` is a specialization of `reference_wrapper`;
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true, /*IsFunction=*/false> {
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true,
/*IsFunction=*/false> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -65,14 +69,15 @@ struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true, /*IsFunction=*/f
#endif
template <typename T1>
constexpr auto operator()(T1 &&t1) const noexcept(noexcept(t1.get().*pm)) -> decltype(t1.get().*pm)
{
constexpr auto operator()(T1 &&t1) const
noexcept(noexcept(t1.get().*pm)) -> decltype(t1.get().*pm) {
return t1.get().*pm;
}
};
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true, /*IsFunction=*/true> {
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true,
/*IsFunction=*/true> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -80,9 +85,9 @@ struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true, /*IsFunction=*/t
#endif
template <typename T1, typename... Tn>
constexpr auto operator()(T1 &&t1, Tn &&...tn) const noexcept(noexcept((t1.get().*pm)(EGGS_FWD(tn)...)))
-> decltype((t1.get().*pm)(EGGS_FWD(tn)...))
{
constexpr auto operator()(T1 &&t1, Tn &&...tn) const
noexcept(noexcept((t1.get().*pm)(EGGS_FWD(tn)...)))
-> decltype((t1.get().*pm)(EGGS_FWD(tn)...)) {
return (t1.get().*pm)(EGGS_FWD(tn)...);
}
};
@ -90,7 +95,8 @@ struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/true, /*IsFunction=*/t
// when `pm` is a pointer to member of a class `C` and `T` does not
// satisfy the previous two items;
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false, /*IsFunction=*/false> {
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false,
/*IsFunction=*/false> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -98,14 +104,15 @@ struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false, /*IsFunction=*/
#endif
template <typename T1>
constexpr auto operator()(T1 &&t1) const noexcept(noexcept((*EGGS_FWD(t1)).*pm)) -> decltype((*EGGS_FWD(t1)).*pm)
{
constexpr auto operator()(T1 &&t1) const
noexcept(noexcept((*EGGS_FWD(t1)).*pm)) -> decltype((*EGGS_FWD(t1)).*pm) {
return (*EGGS_FWD(t1)).*pm;
}
};
template <typename C, typename T>
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false, /*IsFunction=*/true> {
struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false,
/*IsFunction=*/true> {
T C::*pm;
#if !__cpp_aggregate_paren_init
@ -113,26 +120,25 @@ struct invoke_mem_ptr<C, T, /*Ref=*/false, /*RefWrapper=*/false, /*IsFunction=*/
#endif
template <typename T1, typename... Tn>
constexpr auto operator()(T1 &&t1, Tn &&...tn) const noexcept(noexcept(((*EGGS_FWD(t1)).*pm)(EGGS_FWD(tn)...)))
-> decltype(((*EGGS_FWD(t1)).*pm)(EGGS_FWD(tn)...))
{
constexpr auto operator()(T1 &&t1, Tn &&...tn) const
noexcept(noexcept(((*EGGS_FWD(t1)).*pm)(EGGS_FWD(tn)...)))
-> decltype(((*EGGS_FWD(t1)).*pm)(EGGS_FWD(tn)...)) {
return ((*EGGS_FWD(t1)).*pm)(EGGS_FWD(tn)...);
}
};
///////////////////////////////////////////////////////////////////////////
template<typename F>
auto invoke(F &&, ...) -> F &&;
template <typename F> auto invoke(F &&, ...) -> F &&;
template <typename T, typename C, typename T1>
auto invoke(T C::*, T1 const &, ...) -> invoke_mem_ptr<C,
T,
auto invoke(T C::*, T1 const &,
...) -> invoke_mem_ptr<C, T,
/*Ref=*/std::is_base_of<C, T1>::value,
/*RefWrapper=*/false>;
template <typename T, typename C, typename X>
auto invoke(T C::*, std::reference_wrapper<X>, ...) -> invoke_mem_ptr<C,
T,
auto invoke(T C::*, std::reference_wrapper<X>,
...) -> invoke_mem_ptr<C, T,
/*Ref=*/false,
/*RefWrapper=*/true>;
@ -141,11 +147,16 @@ auto invoke(T C::*, std::reference_wrapper<X>, ...) -> invoke_mem_ptr<C,
//! - _Returns_: `INVOKE(F __VA_OPT__(,) __VA_ARGS__)`.
#if __cplusplus > 201703L // C++20: P0306
#define EGGS_INVOKE(F, ...) \
(static_cast<decltype(::eggs::detail::invoke(F __VA_OPT__(, ) __VA_ARGS__))>(F)(__VA_ARGS__))
(static_cast<decltype(::eggs::detail::invoke( \
F __VA_OPT__(, ) __VA_ARGS__))>(F)(__VA_ARGS__))
#elif _MSVC_TRADITIONAL
#define EGGS_INVOKE(F, ...) (static_cast<decltype(::eggs::detail::invoke(F, __VA_ARGS__))>(F)(__VA_ARGS__))
#define EGGS_INVOKE(F, ...) \
(static_cast<decltype(::eggs::detail::invoke(F, __VA_ARGS__))>(F)( \
__VA_ARGS__))
#else
#define EGGS_INVOKE(F, ...) (static_cast<decltype(::eggs::detail::invoke(F, ##__VA_ARGS__))>(F)(__VA_ARGS__))
#define EGGS_INVOKE(F, ...) \
(static_cast<decltype(::eggs::detail::invoke(F, ##__VA_ARGS__))>(F)( \
__VA_ARGS__))
#endif
///////////////////////////////////////////////////////////////////////////
@ -157,21 +168,20 @@ private:
public:
template <typename F, typename... Args>
static constexpr auto
call(F &&f, Args &&...args) noexcept(noexcept(conversion(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...))))
-> decltype(conversion(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
{
static constexpr auto call(F &&f, Args &&...args) noexcept(
noexcept(conversion(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...))))
-> decltype(conversion(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...))) {
return EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...);
}
};
// `static_cast<void>(INVOKE(f, t1, t2, ..., tN))` if `R` is _cv_ `void`.
template<typename R>
struct invoke_r<R, void> {
template <typename R> struct invoke_r<R, void> {
template <typename F, typename... Args>
static constexpr auto call(F &&f, Args &&...args) noexcept(noexcept(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(static_cast<void>(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
{
static constexpr auto call(F &&f, Args &&...args) noexcept(
noexcept(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(static_cast<void>(EGGS_INVOKE(EGGS_FWD(f),
EGGS_FWD(args)...))) {
return static_cast<void>(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...));
}
};
@ -187,11 +197,12 @@ struct invoke_r<R, void> {
namespace eggs {
///////////////////////////////////////////////////////////////////////////
namespace detail {
template<typename T, typename Enable = void>
struct invoke_result_impl {};
template <typename T, typename Enable = void> struct invoke_result_impl {};
template <typename F, typename... Ts>
struct invoke_result_impl<F(Ts...), decltype((void) EGGS_INVOKE(std::declval<F>(), std::declval<Ts>()...))> {
struct invoke_result_impl<F(Ts...),
decltype((void)EGGS_INVOKE(std::declval<F>(),
std::declval<Ts>()...))> {
using type = decltype(EGGS_INVOKE(std::declval<F>(), std::declval<Ts>()...));
};
} // namespace detail
@ -223,7 +234,9 @@ template<typename T, typename Enable = void>
struct is_invocable_impl : std::false_type {};
template <typename F, typename... Ts>
struct is_invocable_impl<F(Ts...), decltype((void) EGGS_INVOKE(std::declval<F>(), std::declval<Ts>()...))>
struct is_invocable_impl<F(Ts...),
decltype((void)EGGS_INVOKE(std::declval<F>(),
std::declval<Ts>()...))>
: std::true_type {};
} // namespace detail
@ -237,7 +250,8 @@ struct is_invocable_impl<F(Ts...), decltype((void) EGGS_INVOKE(std::declval<F>()
//! `ArgTypes` shall be complete types, _cv_ `void`, or arrays of
//! unknown bound.
template <typename Fn, typename... ArgTypes>
struct is_invocable : detail::is_invocable_impl<Fn && (ArgTypes && ...)>::type {};
struct is_invocable : detail::is_invocable_impl<Fn && (ArgTypes && ...)>::type {
};
#if __cpp_variable_templates
//! template <class Fn, class... ArgTypes> // (C++14)
@ -256,7 +270,9 @@ template<typename T, typename R, typename Enable = void>
struct is_invocable_r_impl : std::false_type {};
template <typename F, typename... Ts, typename R>
struct is_invocable_r_impl<F(Ts...), R, decltype((void) EGGS_INVOKE_R(R, std::declval<F>(), std::declval<Ts>()...))>
struct is_invocable_r_impl<F(Ts...), R,
decltype((void)EGGS_INVOKE_R(R, std::declval<F>(),
std::declval<Ts>()...))>
: std::true_type {};
} // namespace detail
@ -270,7 +286,8 @@ struct is_invocable_r_impl<F(Ts...), R, decltype((void) EGGS_INVOKE_R(R, std::de
//! `ArgTypes` shall be complete types, _cv_ `void`, or arrays of
//! unknown bound.
template <typename R, typename Fn, typename... ArgTypes>
struct is_invocable_r : detail::is_invocable_r_impl<Fn && (ArgTypes && ...), R>::type {};
struct is_invocable_r
: detail::is_invocable_r_impl<Fn && (ArgTypes && ...), R>::type {};
#if __cpp_variable_templates
//! template <class R, class Fn, class... ArgTypes> // (C++14)
@ -289,8 +306,12 @@ template<typename T, typename Enable = void>
struct is_nothrow_invocable_impl : std::false_type {};
template <typename F, typename... Ts>
struct is_nothrow_invocable_impl<F(Ts...), decltype((void) EGGS_INVOKE(std::declval<F>(), std::declval<Ts>()...))>
: std::integral_constant<bool, noexcept(EGGS_INVOKE(std::declval<F>(), std::declval<Ts>()...))> {};
struct is_nothrow_invocable_impl<F(Ts...),
decltype((void)EGGS_INVOKE(
std::declval<F>(), std::declval<Ts>()...))>
: std::integral_constant<bool,
noexcept(EGGS_INVOKE(std::declval<F>(),
std::declval<Ts>()...))> {};
} // namespace detail
//! template <class Fn, class... ArgTypes> struct is_nothrow_invocable;
@ -303,7 +324,8 @@ struct is_nothrow_invocable_impl<F(Ts...), decltype((void) EGGS_INVOKE(std::decl
//! `ArgTypes` shall be complete types, _cv_ `void`, or arrays of
//! unknown bound.
template <typename Fn, typename... ArgTypes>
struct is_nothrow_invocable : detail::is_nothrow_invocable_impl<Fn && (ArgTypes && ...)>::type {};
struct is_nothrow_invocable
: detail::is_nothrow_invocable_impl<Fn && (ArgTypes && ...)>::type {};
#if __cpp_variable_templates
//! template <class Fn, class... ArgTypes> // (C++14)
@ -313,7 +335,8 @@ template<typename Fn, typename... ArgTypes>
#if __cpp_inline_variables
inline
#endif
constexpr bool is_nothrow_invocable_v = is_nothrow_invocable<Fn, ArgTypes...>::value;
constexpr bool is_nothrow_invocable_v =
is_nothrow_invocable<Fn, ArgTypes...>::value;
#endif
///////////////////////////////////////////////////////////////////////////
@ -322,23 +345,27 @@ template<typename T, typename R, typename Enable = void>
struct is_nothrow_invocable_r_impl : std::false_type {};
template <typename F, typename... Ts, typename R>
struct is_nothrow_invocable_r_impl<F(Ts...),
R,
struct is_nothrow_invocable_r_impl<
F(Ts...), R,
decltype((void)EGGS_INVOKE_R(R, std::declval<F>(), std::declval<Ts>()...))>
: std::integral_constant<bool, noexcept(EGGS_INVOKE_R(R, std::declval<F>(), std::declval<Ts>()...))> {};
: std::integral_constant<bool,
noexcept(EGGS_INVOKE_R(R, std::declval<F>(),
std::declval<Ts>()...))> {};
} // namespace detail
//! template <class R, class Fn, class... ArgTypes> struct is_nothrow_invocable_r;
//! template <class R, class Fn, class... ArgTypes> struct
//! is_nothrow_invocable_r;
//!
//! - _Condition_: `eggs::is_invocable_r_v<R, Fn, ArgTypes...>` is `true`
//! and the expression `INVOKE(std::declval<Fn>(), std::declval<ArgTypes>()...)`
//! is known not to throw any exceptions.
//! and the expression `INVOKE(std::declval<Fn>(),
//! std::declval<ArgTypes>()...)` is known not to throw any exceptions.
//!
//! - _Comments_: `Fn`, `R`, and all types in the template parameter pack
//! `ArgTypes` shall be complete types, _cv_ `void`, or arrays of
//! unknown bound.
template <typename R, typename Fn, typename... ArgTypes>
struct is_nothrow_invocable_r : detail::is_nothrow_invocable_r_impl<Fn && (ArgTypes && ...), R>::type {};
struct is_nothrow_invocable_r
: detail::is_nothrow_invocable_r_impl<Fn && (ArgTypes && ...), R>::type {};
#if __cpp_variable_templates
//! template <class R, class Fn, class... ArgTypes> // (C++14)
@ -348,7 +375,8 @@ template<typename R, typename Fn, typename... ArgTypes>
#if __cpp_inline_variables
inline
#endif
constexpr bool is_nothrow_invocable_r_v = is_nothrow_invocable_r<R, Fn, ArgTypes...>::value;
constexpr bool is_nothrow_invocable_r_v =
is_nothrow_invocable_r<R, Fn, ArgTypes...>::value;
#endif
///////////////////////////////////////////////////////////////////////////
@ -361,10 +389,9 @@ inline
//! - _Remarks_: This function shall not participate in overload resolution
//! unless `eggs::is_invocable_v<F, Args...>` is `true`.
template <typename Fn, typename... ArgTypes>
constexpr auto
invoke(Fn &&f, ArgTypes &&...args) noexcept(noexcept(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...))
{
constexpr auto invoke(Fn &&f, ArgTypes &&...args) noexcept(
noexcept(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...)) {
return EGGS_INVOKE(EGGS_FWD(f), EGGS_FWD(args)...);
}
@ -378,14 +405,16 @@ invoke(Fn &&f, ArgTypes &&...args) noexcept(noexcept(EGGS_INVOKE(EGGS_FWD(f), EG
//! - _Remarks_: This function shall not participate in overload resolution
//! unless `eggs::is_invocable_r_v<R, F, Args...>` is `true`.
template <typename R, typename Fn, typename... ArgTypes>
constexpr auto
invoke_r(Fn &&f, ArgTypes &&...args) noexcept(noexcept(EGGS_INVOKE_R(R, EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(EGGS_INVOKE_R(R, EGGS_FWD(f), EGGS_FWD(args)...))
{
constexpr auto invoke_r(Fn &&f, ArgTypes &&...args) noexcept(
noexcept(EGGS_INVOKE_R(R, EGGS_FWD(f), EGGS_FWD(args)...)))
-> decltype(EGGS_INVOKE_R(R, EGGS_FWD(f), EGGS_FWD(args)...)) {
return EGGS_INVOKE_R(R, EGGS_FWD(f), EGGS_FWD(args)...);
}
#undef EGGS_FWD
} // namespace eggs
namespace tile {
using namespace eggs;
}
#endif /*EGGS_INVOKE_HPP*/