100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
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#ifndef BOOST_QVM_TRAITS_HPP_INCLUDED
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#define BOOST_QVM_TRAITS_HPP_INCLUDED
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// Copyright 2008-2022 Emil Dotchevski and Reverge Studios, Inc.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/qvm/is_scalar.hpp>
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#include <boost/qvm/enable_if.hpp>
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#include <boost/qvm/config.hpp>
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namespace boost { namespace qvm {
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template <class M>
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struct
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mat_traits
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{
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static int const rows=0;
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static int const cols=0;
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typedef void scalar_type;
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};
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template <class T>
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struct
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is_mat
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{
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static bool const value = is_scalar<typename mat_traits<T>::scalar_type>::value && mat_traits<T>::rows>0 && mat_traits<T>::cols>0;
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};
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namespace
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qvm_detail
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{
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template <class T, T>
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struct
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mtr_dispatch_yes
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{
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char x, y;
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};
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}
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template <class T>
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class
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mat_write_element_ref
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{
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template <class U>
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static qvm_detail::mtr_dispatch_yes<typename mat_traits<U>::scalar_type & (*)( U & ), &mat_traits<U>::template write_element<0,0> > check(int);
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template <class>
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static char check(long);
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public:
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static bool const value = sizeof(check<T>(0)) > 1;
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};
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template <int R, int C, class M>
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BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
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typename enable_if_c<
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mat_write_element_ref<M>::value,
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void>::type
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write_mat_element( M & m, typename mat_traits<M>::scalar_type s )
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{
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mat_traits<M>::template write_element<R,C>(m) = s;
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}
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template <int R, int C, class M>
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BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
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typename enable_if_c<
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!mat_write_element_ref<M>::value,
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void>::type
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write_mat_element( M & m, typename mat_traits<M>::scalar_type s )
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{
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mat_traits<M>::template write_element<R,C>(m, s);
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}
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template <class M>
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BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
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typename enable_if_c<
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mat_write_element_ref<M>::value,
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void>::type
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write_mat_element_idx( int r, int c, M & m, typename mat_traits<M>::scalar_type s )
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{
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mat_traits<M>::write_element_idx(r, c, m) = s;
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}
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template <class M>
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BOOST_QVM_CONSTEXPR BOOST_QVM_INLINE_CRITICAL
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typename enable_if_c<
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!mat_write_element_ref<M>::value,
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void>::type
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write_mat_element_idx( int r, int c, M & m, typename mat_traits<M>::scalar_type s )
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{
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mat_traits<M>::write_element_idx(r, c, m, s);
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}
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} }
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#endif
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