Danny Robson
f6056153e3
This places, at long last, the core library code into the same namespace as the extended library code.
219 lines
7.4 KiB
C++
219 lines
7.4 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2012-2017 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef CRUFT_UTIL_COORD_TRAITS_HPP
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#define CRUFT_UTIL_COORD_TRAITS_HPP
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#include "fwd.hpp"
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#include <cstddef>
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#include <type_traits>
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namespace cruft {
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///////////////////////////////////////////////////////////////////////
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// operation traits
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template <typename, typename>
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struct result { };
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//-------------------------------------------------------------------------
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#define RESULT_T(ArgA,ArgB,ResultT) \
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template < \
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std::size_t S, \
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typename ValueA,\
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typename ValueB\
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> struct result<\
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ArgA<S,ValueA>,\
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ArgB<S,ValueB>\
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> {\
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using type = ResultT<S,std::common_type_t<ValueA,ValueB>>; \
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};
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#if 0
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template <
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std::size_t S,
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typename ValueA,
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typename ValueB
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> struct result<
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srgba<S,ValueA>,
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srgba<S,ValueB>
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> {
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using type = srgba<S,std::common_type_t<ValueA,ValueB>>;
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};
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template <std::size_t S, typename T> struct result<srgba<S,T>, vector<S,T>> { using type = srgba<S,T>; };
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template <std::size_t S, typename T> struct result<vector<S,T>,srgba<S,T>> { using type = srgba<S,T>; };
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template <std::size_t S, typename T> struct result<extent<S,T>,extent<S,T>> { using type = extent<S,T>; };
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template <std::size_t S, typename T> struct result<extent<S,T>,vector<S,T>> { using type = extent<S,T>; };
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template <std::size_t S, typename T> struct result<point<S,T>, extent<S,T>> { using type = point <S,T>; };
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template <std::size_t S, typename T> struct result<point<S,T>, vector<S,T>> { using type = point <S,T>; };
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template <std::size_t S, typename T> struct result<vector<S,T>,point<S,T>> { using type = point <S,T>; };
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template <std::size_t S, typename T> struct result<vector<S,T>,vector<S,T>> { using type = vector<S,T>; };
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#endif
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RESULT_T(extent,extent,extent)
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RESULT_T(extent,vector,extent)
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RESULT_T(point,extent,point)
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RESULT_T(point,vector,point)
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RESULT_T(srgba,vector,srgba)
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RESULT_T(srgba,srgba,srgba)
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RESULT_T(vector,extent,extent)
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RESULT_T(vector,point,point)
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RESULT_T(vector,srgba,srgba)
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RESULT_T(vector,vector,vector)
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template <
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typename A, typename B
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>
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using result_t = typename result<A,B>::type;
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///////////////////////////////////////////////////////////////////////////
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template <typename A, typename B, typename = std::void_t<>>
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struct has_result : public std::false_type {};
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template <typename CoordA, typename CoordB>
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struct has_result<
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CoordA,
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CoordB,
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std::void_t<
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result_t<CoordA,CoordB>
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>
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> : public std::true_type {};
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template <typename A, typename B>
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constexpr auto has_result_v = has_result<A,B>::value;
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//---------------------------------------------------------------------
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template <typename>
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struct has_norm : public std::false_type { };
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template <std::size_t S, typename T> struct has_norm<vector<S,T>> : public std::true_type { };
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template <typename T>
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constexpr auto has_norm_v = has_norm<T>::value;
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//---------------------------------------------------------------------
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template <typename T>
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struct has_scalar_op : public std::false_type { };
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template <std::size_t S, typename T> struct has_scalar_op<srgba<S,T>> : public std::true_type { };
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template <std::size_t S, typename T> struct has_scalar_op<extent<S,T>> : public std::true_type { };
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template <std::size_t S, typename T> struct has_scalar_op<point<S,T>> : public std::true_type { };
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template <std::size_t S, typename T> struct has_scalar_op<vector<S,T>> : public std::true_type { };
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template <typename T>
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constexpr auto has_scalar_op_v = has_scalar_op<T>::value;
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template <class> struct is_coord : std::false_type { };
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template <typename T> struct is_coord<const T> : is_coord<T> {};
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template <typename T> struct is_coord<T&> : is_coord<T> {};
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template <std::size_t S, typename T> struct is_coord<point<S,T>> : std::true_type { };
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template <std::size_t S, typename T> struct is_coord<extent<S,T>> : std::true_type { };
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template <std::size_t S, typename T> struct is_coord<vector<S,T>> : std::true_type { };
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template <std::size_t S, typename T> struct is_coord<srgba<S,T>> : std::true_type { };
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template <class K>
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constexpr bool
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is_coord_v = is_coord<K>::value;
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///////////////////////////////////////////////////////////////////////////
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template <typename T> struct has_redim : std::false_type {};
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//---------------------------------------------------------------------
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template <std::size_t S, typename T> struct has_redim< point<S,T>> : public std::true_type {};
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template <std::size_t S, typename T> struct has_redim<vector<S,T>> : public std::true_type {};
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template <std::size_t S, typename T> struct has_redim<extent<S,T>> : public std::true_type {};
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//---------------------------------------------------------------------
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template <typename T> constexpr auto has_redim_v = has_redim<T>::value;
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///////////////////////////////////////////////////////////////////////////
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template <typename> struct redim_type {};
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//---------------------------------------------------------------------
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template <std::size_t S, typename T> struct redim_type<point<S,T>>
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{ template <std::size_t _S> using type = point<_S,T>; };
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template <std::size_t S, typename T> struct redim_type<vector<S,T>>
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{ template <std::size_t _S> using type = vector<_S,T>; };
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template <std::size_t S, typename T> struct redim_type<extent<S,T>>
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{ template <std::size_t _S> using type = extent<_S,T>; };
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//---------------------------------------------------------------------
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template <
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typename Self,
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std::size_t S
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>
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using redim_t = typename redim_type<Self>::template type<S>;
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///////////////////////////////////////////////////////////////////////////
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template <typename> struct revalue_type {};
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//-------------------------------------------------------------------------
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template <std::size_t S, typename T>
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struct revalue_type<point<S,T>> {
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template <typename _T> using type = point<S,_T>;
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};
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template <std::size_t S, typename T>
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struct revalue_type<vector<S,T>> {
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template <typename _T> using type = vector<S,_T>;
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};
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template <std::size_t S, typename T>
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struct revalue_type<extent<S,T>> {
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template <typename _T> using type = extent<S,_T>;
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};
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//-------------------------------------------------------------------------
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template <typename Self, typename T>
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using revalue_t = typename revalue_type<Self>::template type<T>;
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///////////////////////////////////////////////////////////////////////////
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template <typename,typename=void> struct arity {};
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template <typename T>
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struct arity<T,std::enable_if_t<std::is_arithmetic_v<T>,void>
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> :std::integral_constant<std::size_t, 1>
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{ };
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template <typename T>
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struct arity<
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T,std::enable_if_t<is_coord_v<T>,void>
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> :std::integral_constant<std::size_t,T::elements>
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{ };
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///////////////////////////////////////////////////////////////////////////
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template <typename T>
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constexpr auto arity_v = arity<T>::value;
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}
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#endif
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