You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
1.7 KiB
71 lines
1.7 KiB
// |
|
// Copyright (c) 2009 Rutger ter Borg |
|
// |
|
// Distributed under the Boost Software License, Version 1.0. |
|
// (See accompanying file LICENSE_1_0.txt or copy at |
|
// http://www.boost.org/LICENSE_1_0.txt) |
|
// |
|
|
|
#ifndef BOOST_NUMERIC_BINDINGS_AT_HPP |
|
#define BOOST_NUMERIC_BINDINGS_AT_HPP |
|
|
|
#include <boost/numeric/bindings/detail/offset.hpp> |
|
|
|
namespace boost { |
|
namespace numeric { |
|
namespace bindings { |
|
namespace detail { |
|
|
|
template< typename T, typename Enable = void > |
|
struct at_impl { |
|
|
|
typedef typename bindings::value_type<T>::type& result_type; |
|
|
|
// TODO implement other array structures such as triangular, band, etc. |
|
static result_type invoke( T& t, const std::ptrdiff_t i1, std::ptrdiff_t i2 ) { |
|
return t( i1, i2 ); |
|
} |
|
|
|
}; |
|
|
|
template< typename T > |
|
struct at_impl< T, typename boost::enable_if< bindings::has_linear_array<T> >::type > { |
|
|
|
typedef typename bindings::value_type<T>::type& result_type; |
|
|
|
static result_type invoke( T& t, const std::ptrdiff_t i1 ) { |
|
return *( bindings::begin_value(t) + offset(t,i1) ); |
|
} |
|
|
|
static result_type invoke( T& t, const std::ptrdiff_t i1, std::ptrdiff_t i2 ) { |
|
return *( bindings::begin_value(t) + offset(t,i1,i2) ); |
|
} |
|
|
|
}; |
|
|
|
} |
|
|
|
namespace result_of { |
|
|
|
template< typename T > |
|
struct at { |
|
typedef typename detail::at_impl<T>::result_type type; |
|
}; |
|
|
|
} |
|
|
|
template< typename T > |
|
typename result_of::at<T>::type at( T& t, const std::ptrdiff_t i1 ) { |
|
return detail::at_impl<T>::invoke( t, i1 ); |
|
} |
|
|
|
template< typename T > |
|
typename result_of::at<T>::type at( T& t, const std::ptrdiff_t i1, const std::ptrdiff_t i2 ) { |
|
return detail::at_impl<T>::invoke( t, i1, i2 ); |
|
} |
|
|
|
} // bindings |
|
} // numeric |
|
} // boost |
|
|
|
#endif
|
|
|