146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
//Copyright (c) 2008-2016 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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#ifndef UUID_7FF8E2E00E5411E2AB79F7FE6188709B
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#define UUID_7FF8E2E00E5411E2AB79F7FE6188709B
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#include <boost/qvm/vec_traits.hpp>
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#include <boost/qvm/inline.hpp>
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#include <boost/qvm/assert.hpp>
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#include <boost/qvm/enable_if.hpp>
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#include <boost/qvm/error.hpp>
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#include <boost/exception/info.hpp>
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namespace
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boost
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{
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namespace
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qvm
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{
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////////////////////////////////////////////////
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namespace
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qvm_detail
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{
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template <int D>
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struct
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vec_index_read_defined
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{
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static bool const value=false;
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};
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template <int I,int N>
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struct
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vector_r
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{
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template <class A>
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static
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BOOST_QVM_INLINE_CRITICAL
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typename vec_traits<A>::scalar_type
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read_element_idx( A const & a, int i )
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{
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return I==i?
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vec_traits<A>::template read_element<I>(a) :
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vector_r<I+1,N>::read_element_idx(a,i);
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}
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};
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template <int N>
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struct
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vector_r<N,N>
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{
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template <class A>
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static
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BOOST_QVM_INLINE_TRIVIAL
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typename vec_traits<A>::scalar_type
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read_element_idx( A const & a, int )
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{
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BOOST_QVM_ASSERT(0);
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return vec_traits<A>::template read_element<0>(a);
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}
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};
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}
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template <class A>
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BOOST_QVM_INLINE_TRIVIAL
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typename boost::enable_if_c<
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is_vec<A>::value &&
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!qvm_detail::vec_index_read_defined<vec_traits<A>::dim>::value,
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typename vec_traits<A>::scalar_type>::type
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vec_index_read( A const & a, int i )
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{
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return qvm_detail::vector_r<0,vec_traits<A>::dim>::read_element_idx(a,i);
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}
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////////////////////////////////////////////////
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namespace
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qvm_detail
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{
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template <int D>
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struct
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vec_index_write_defined
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{
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static bool const value=false;
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};
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template <int I,int N>
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struct
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vector_w
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{
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template <class A>
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static
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BOOST_QVM_INLINE_CRITICAL
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typename vec_traits<A>::scalar_type &
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write_element_idx( A & a, int i )
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{
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return I==i?
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vec_traits<A>::template write_element<I>(a) :
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vector_w<I+1,N>::write_element_idx(a,i);
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}
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};
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template <int N>
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struct
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vector_w<N,N>
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{
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template <class A>
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static
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BOOST_QVM_INLINE_TRIVIAL
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typename vec_traits<A>::scalar_type &
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write_element_idx( A & a, int )
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{
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BOOST_QVM_ASSERT(0);
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return vec_traits<A>::template write_element<0>(a);
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}
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};
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}
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template <class A>
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BOOST_QVM_INLINE_TRIVIAL
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typename boost::enable_if_c<
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is_vec<A>::value &&
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!qvm_detail::vec_index_write_defined<vec_traits<A>::dim>::value,
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typename vec_traits<A>::scalar_type &>::type
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vec_index_write( A & a, int i )
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{
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return qvm_detail::vector_w<0,vec_traits<A>::dim>::write_element_idx(a,i);
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}
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////////////////////////////////////////////////
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namespace
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sfinae
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{
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using ::boost::qvm::vec_index_read;
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using ::boost::qvm::vec_index_write;
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}
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////////////////////////////////////////////////
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}
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}
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#endif
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