59 lines
2.4 KiB
C++
59 lines
2.4 KiB
C++
#pragma once
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#include <tuple>
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#include <type_traits>
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#include <regex>
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//https://qiita.com/angeart/items/94734d68999eca575881
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namespace stx {
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namespace lambda_detail {
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template <typename...>
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struct member_type;
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template <typename ret, typename klass, typename... args>
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struct member_type<std::true_type, ret, klass, args...> {
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using member = std::true_type;
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using invoker_function = std::function<ret(klass*, args...)>;
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};
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template <typename ret, typename klass, typename... args>
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struct member_type<std::false_type, ret, klass, args...> {
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using member = std::false_type;
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using invoker_function = std::function<ret(args...)>;
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};
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template<typename t_member, class t_return_type, class t_klass, class flag_mutable, class... t_args>
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struct types : member_type<t_member, t_return_type, t_klass, t_args...> {
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public:
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static constexpr bool has_klass = std::is_class<t_klass>::value;
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static constexpr int argc = sizeof...(t_args);
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using flag_member = t_member;
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using klass = t_klass;
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using return_type = t_return_type;
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using is_mutable = flag_mutable;
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using args = std::tuple<t_args...>;
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template<size_t i>
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struct arg {
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typedef typename std::tuple_element<i, std::tuple<t_args...>>::type type;
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};
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};
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template<class lambda>
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struct lambda_type_impl;
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template<class ret, class klass, class... args>
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struct lambda_type_impl<ret(klass::*)(args...) const> : lambda_detail::types<std::false_type, ret, klass, std::true_type, args...> {};
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}
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template<class lambda>
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struct lambda_type : lambda_detail::lambda_type_impl<decltype(&lambda::operator())> { };
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template<class ret, class klass, class... args>
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struct lambda_type<ret(klass::*)(args...)> : lambda_detail::types<typename std::is_member_function_pointer<ret(klass::*)(args...)>::type,ret,klass,std::true_type,args...> { };
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template<class ret, class klass, class... args>
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struct lambda_type<ret(klass::*)(args...) const> : lambda_detail::types<typename std::is_member_function_pointer<ret(klass::*)(args...) const>::type, ret, klass, std::false_type, args...> { };
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}; |