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69875c238e
* Resolve clang-tidy warnings, update single_header_generator.py * Update single header test, resolve additional clang-tidy warnings
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
#pragma once
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#include <cstdlib>
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#include <functional>
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namespace ss {
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////////////////
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// function traits
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////////////////
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template <size_t N, typename T, typename... Ts>
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struct decayed_arg_n {
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static_assert(N - 1 != sizeof...(Ts), "index out of range");
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using type = typename decayed_arg_n<N - 1, Ts...>::type;
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};
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template <typename T, typename... Ts>
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struct decayed_arg_n<0, T, Ts...> {
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using type = std::decay_t<T>;
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};
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template <typename T>
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struct function_traits;
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template <typename R, typename C, typename Arg>
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struct function_traits<std::function<R(C&, const Arg&) const>> {
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using arg_type = Arg;
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};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...)> {
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using arg0 = typename decayed_arg_n<0, Ts...>::type;
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};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...) const> : function_traits<R(Ts...)> {};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...)&> : function_traits<R(Ts...)> {};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...) const&> : function_traits<R(Ts...)> {};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...) &&> : function_traits<R(Ts...)> {};
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template <typename R, typename... Ts>
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struct function_traits<R(Ts...) const&&> : function_traits<R(Ts...)> {};
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template <typename MemberFunction>
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struct member_wrapper;
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template <typename R, typename T>
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struct member_wrapper<R T::*> {
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using arg_type = typename function_traits<R>::arg0;
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};
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////////////////
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// has method
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////////////////
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#define INIT_HAS_METHOD(method) \
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template <typename T> \
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class has_m_##method { \
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template <typename C> \
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static std::true_type test(decltype(&C::method)); \
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\
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template <typename C> \
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static std::false_type test(...); \
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\
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public: \
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constexpr static bool value = decltype(test<T>(0))::value; \
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}; \
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\
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template <typename T> \
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constexpr bool has_m_##method##_t = has_m_##method<T>::value;
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} /* namespace ss */
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