Danny Robson
d3f434b523
The coordinate system was unable to support types that prohibited redim or retype operations. Additionally, the `tags' type used for providing named data parameters was unwiedly. We remove much of the dependance on template template parameters in the defined operations and instead define these in terms of a template specialisation of is_coord. The tag types were replaced with direct specialisation of the `store' struct by the primary type, and passing this type through use of the CRTP.
171 lines
6.5 KiB
C++
171 lines
6.5 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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 util {
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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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template <std::size_t S, typename T> struct result<srgba<S,T>,srgba<S,T>> { using type = srgba<S,T>; };
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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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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>
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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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