odeint/util/resizer.hpp

0001 /*
0002  [auto_generated]
0003  boost/numeric/odeint/util/resizer.hpp
0004
0005  [begin_description]
0006  Implementation of the resizers.
0007  [end_description]
0008
0009  Copyright 2011-2012 Mario Mulansky
0010  Copyright 2011 Karsten Ahnert
0011
0012  Distributed under the Boost Software License, Version 1.0.
0013  (See accompanying file LICENSE_1_0.txt or
0014  copy at http://www.boost.org/LICENSE_1_0.txt)
0015  */
0016
0017
0018 #ifndef BOOST_NUMERIC_ODEINT_UTIL_RESIZER_HPP_INCLUDED
0019 #define BOOST_NUMERIC_ODEINT_UTIL_RESIZER_HPP_INCLUDED
0020
0021
0022 #include <boost/numeric/odeint/util/is_resizeable.hpp>
0023 #include <boost/numeric/odeint/util/same_size.hpp>
0024 #include <boost/numeric/odeint/util/resize.hpp>
0025 #include <type_traits>
0026
0027 namespace boost {
0028 namespace numeric {
0029 namespace odeint {
0030
0031 template< class ResizeWrappedState , class State >
0032 bool adjust_size_by_resizeability( ResizeWrappedState &x , const State &y , std::true_type )
0033 {
0034     if ( !same_size( x.m_v , y ) )
0035     {
0036         resize( x.m_v , y );
0037         return true;
0038     }
0039     else
0040         return false;
0041 }
0042
0043 template< class ResizeWrappedState , class State >
0044 bool adjust_size_by_resizeability( ResizeWrappedState & /* x */ , const State & /* y */ , std::false_type )
0045 {
0046     return false;
0047 }
0048
0049 struct always_resizer
0050 {
0051     template< class State , class ResizeFunction >
0052     bool adjust_size( const State &x , ResizeFunction f )
0053     {
0054         return f( x );
0055     }
0056 };
0057
0058
0059 struct initially_resizer
0060 {
0061
0062     bool m_initialized;
0063
0064     initially_resizer() : m_initialized( false )
0065     { }
0066
0067     template< class State , class ResizeFunction >
0068     bool adjust_size( const State &x , ResizeFunction f )
0069     {
0070         if( !m_initialized )
0071         {
0072             m_initialized = true;
0073             return f( x );
0074         } else
0075             return false;
0076     }
0077 };
0078
0079
0080 struct never_resizer
0081 {
0082     template< class State , class ResizeFunction >
0083     bool adjust_size( const State &/*x*/ , ResizeFunction /*f*/ )
0084     {
0085         return false;
0086     }
0087 };
0088
0089
0090 }
0091 }
0092 }
0093
0094 #endif // BOOST_NUMERIC_ODEINT_UTIL_RESIZER_HPP_INCLUDED