216 lines
5.9 KiB
C++
216 lines
5.9 KiB
C++
#pragma once
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#include <chrono>
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#include <format>
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#include <ranges>
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#include <tuple>
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#include <type_traits>
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/*
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ABSTRACT DEVICE COMPONENTS LIBRARY
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*/
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namespace adc::traits
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{
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// check if type can be used with std::format_to
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// (from
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// https://stackoverflow.com/questions/72430369/how-to-check-that-a-type-is-formattable-using-type-traits-concepts)
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template <typename T>
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concept formattable =
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requires(T v, std::format_context ctx) { std::formatter<std::remove_cvref_t<T>>().format(v, ctx); };
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// range of char/const char
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template <typename R, typename CharT = char>
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concept adc_char_range =
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std::ranges::range<R> && std::is_same_v<std::remove_cv_t<std::ranges::range_value_t<R>>, CharT>;
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// output range of char/const char
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template <typename R, typename CharT = char>
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concept adc_output_char_range =
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std::ranges::output_range<R, CharT> && std::same_as<std::remove_cv_t<std::ranges::range_value_t<R>>, CharT>;
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// range of char/const char
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template <typename R, typename CharT = char>
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concept adc_input_char_range =
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std::ranges::input_range<R> && std::is_same_v<std::remove_cv_t<std::ranges::range_value_t<R>>, CharT>;
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template <typename R>
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concept adc_char_view = std::ranges::view<R> && std::same_as<std::ranges::range_value_t<R>, char>;
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template <typename R>
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concept adc_view_or_output_char_range = adc_char_view<R> || adc_output_char_range<R>;
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template <typename R>
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concept adc_range_of_view_char_range = std::ranges::range<R> && std::ranges::view<std::ranges::range_value_t<R>> &&
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std::same_as<std::ranges::range_value_t<std::ranges::range_value_t<R>>, char>;
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template <typename R>
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concept adc_range_of_input_char_range =
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std::ranges::range<R> && traits::adc_input_char_range<std::ranges::range_value_t<R>>;
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template <typename R>
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concept adc_range_of_view_or_output_char_range = adc_range_of_view_char_range<R> || adc_output_char_range<R>;
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// deduce returned type of callable
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// template <typename T>
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// using adc_retval_t = std::invoke_result_t<std::remove_cvref_t<T>>;
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// helper classes
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template <typename... Ts>
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struct adc_func_traits_helper_t;
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template <typename R>
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struct adc_func_traits_helper_t<R> {
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using ret_t = R;
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using args_t = std::tuple<>;
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using arg1_t = void;
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static constexpr size_t arity = 0;
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};
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template <typename R, typename Arg, typename... Args>
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struct adc_func_traits_helper_t<R, Arg, Args...> {
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using ret_t = R;
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using args_t = std::tuple<Arg, Args...>;
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using arg1_t = Arg;
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static constexpr size_t arity = sizeof...(Args) + 1;
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};
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// callable concept and its signature traits
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template <typename T>
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concept adc_is_callable = std::is_function_v<T> || (std::is_object_v<T> && requires(T) { &T::operator(); });
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// std::is_function_v<T> || (std::is_object_v<T> && requires(T) { std::is_function_v<decltype(&T::operator())>; });
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template <typename F>
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struct adc_func_traits {
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// use of an empty struct here to match std::invoke_result behaivior (at least of GCC)
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};
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// special case
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template <>
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struct adc_func_traits<std::nullptr_t> {
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using ret_t = std::nullptr_t;
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using args_t = std::tuple<>;
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using arg1_t = std::nullptr_t;
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static constexpr size_t arity = 0;
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};
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template <typename R, typename... Args>
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struct adc_func_traits<R (*)(Args...)> : adc_func_traits_helper_t<R, Args...> {
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};
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template <typename R, typename... Args>
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struct adc_func_traits<R(Args...)> : adc_func_traits_helper_t<R, Args...> {
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};
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template <typename C, typename R, typename... Args>
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struct adc_func_traits<R (C::*)(Args...)> : adc_func_traits_helper_t<R, Args...> {
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};
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template <typename C, typename R, typename... Args>
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struct adc_func_traits<R (C::*)(Args...) const> : adc_func_traits_helper_t<R, Args...> {
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};
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template <typename F>
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requires adc_is_callable<F>
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struct adc_func_traits<F> : adc_func_traits<decltype(&F::operator())> {
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};
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template <typename F>
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struct adc_func_traits<F&> : adc_func_traits<F> {
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};
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template <typename F>
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struct adc_func_traits<F&&> : adc_func_traits<F> {
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};
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template <typename T>
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using adc_retval_t = typename adc_func_traits<T>::ret_t;
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template <typename T>
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using adc_func_arg1_t = typename adc_func_traits<T>::arg1_t;
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// deduce type
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template <typename T>
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using adc_deduced_type =
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std::conditional_t<std::is_lvalue_reference_v<T> && !std::is_const_v<std::remove_reference_t<T>>,
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T&,
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std::remove_cvref_t<T>>;
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// perfect-forwarding wrapper
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template <typename T, typename... Ts>
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constexpr static auto adc_pf_wrapper(T&& v, Ts&&... vs)
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{
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return std::tuple<adc_deduced_type<T>, adc_deduced_type<Ts>...>(std::forward<T>(v), std::forward<Ts>(vs)...);
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}
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// check if type T is one of types in sequence Rest (e.g. adc_is_any<int,char,float,int,std::string>::value == true)
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template <typename T, typename... Rest>
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struct adc_is_any_of : std::disjunction<std::is_same<T, Rest>...> {
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};
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template <typename T, typename... Rest>
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static inline constexpr bool adc_is_any_of_v = std::disjunction_v<std::is_same<T, Rest>...>;
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template <typename T>
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struct adc_is_tuple : std::false_type {
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};
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template <typename T>
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struct adc_is_tuple<T&> : adc_is_tuple<T> {
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};
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template <typename T>
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struct adc_is_tuple<const T&> : adc_is_tuple<T> {
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};
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template <typename T>
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struct adc_is_tuple<T&&> : adc_is_tuple<T> {
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};
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template <typename... Ts>
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struct adc_is_tuple<std::tuple<Ts...>> : std::true_type {
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};
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template <typename T1, typename T2>
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struct adc_is_tuple<std::pair<T1, T2>> : std::true_type {
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};
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template <typename T>
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static inline constexpr bool adc_is_tuple_v = adc_is_tuple<T>::value;
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template <typename T>
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concept adc_tuple_like = adc_is_tuple_v<T> == true;
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template <typename T>
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// from https://stackoverflow.com/questions/74383254/concept-that-models-only-the-stdchrono-duration-types
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concept adc_time_duration_c = requires {
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[]<class Rep, class Period>(std::type_identity<std::chrono::duration<Rep, Period>>) {
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}(std::type_identity<std::remove_cvref_t<T>>());
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};
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} // namespace adc::traits
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