Chris@16: //  (C) Copyright Gennadiy Rozental 2005-2008.
Chris@16: //  Distributed under the Boost Software License, Version 1.0.
Chris@16: //  (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org/libs/test for the library home page.
Chris@16: //
Chris@16: //  File        : $RCSfile$
Chris@16: //
Chris@101: //  Version     : $Revision$
Chris@16: //
Chris@16: //  Description : default algorithms for string to specific type convertions
Chris@16: // ***************************************************************************
Chris@16: 
Chris@16: #ifndef BOOST_RT_INTERPRET_ARGUMENT_VALUE_HPP_062604GER
Chris@16: #define BOOST_RT_INTERPRET_ARGUMENT_VALUE_HPP_062604GER
Chris@16: 
Chris@16: // Boost.Runtime.Parameter
Chris@16: #include <boost/test/utils/runtime/config.hpp>
Chris@16: #include <boost/test/utils/runtime/trace.hpp>
Chris@16: 
Chris@16: // Boost.Test
Chris@16: #include <boost/test/utils/basic_cstring/io.hpp>
Chris@16: #include <boost/test/utils/basic_cstring/compare.hpp>
Chris@16: 
Chris@16: // Boost
Chris@16: #include <boost/optional.hpp>
Chris@16: #include <boost/lexical_cast.hpp>
Chris@16: 
Chris@16: // STL
Chris@16: // !! could we eliminate these includes?
Chris@16: #include <list>
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: namespace BOOST_RT_PARAM_NAMESPACE {
Chris@16: 
Chris@16: // ************************************************************************** //
Chris@16: // **************       runtime::interpret_argument_value      ************** //
Chris@16: // ************************************************************************** //
Chris@16: // returns true if source is used false otherwise
Chris@16: 
Chris@16: // generic case
Chris@16: template<typename T>
Chris@16: struct interpret_argument_value_impl {
Chris@16:     static bool _( cstring source, boost::optional<T>& res )
Chris@16:     {
Chris@16:         BOOST_RT_PARAM_TRACE( "In interpret_argument_value_impl<" << typeid(T).name() << ">" );
Chris@16: 
Chris@16:         res = lexical_cast<T>( source );
Chris@16: 
Chris@16:         BOOST_RT_PARAM_TRACE( "String " << source << " is interpreted as " << *res );
Chris@16:         return true;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: // dstring case
Chris@16: template<>
Chris@16: struct interpret_argument_value_impl<dstring> {
Chris@16:     static bool _( cstring source, boost::optional<dstring>& res )
Chris@16:     {
Chris@16:         BOOST_RT_PARAM_TRACE( "In interpret_argument_value_impl<dstring>" );
Chris@16: 
Chris@16:         res = dstring();
Chris@16:         assign_op( *res, source, 0 );
Chris@16: 
Chris@16:         return true;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: // cstring case
Chris@16: template<>
Chris@16: struct interpret_argument_value_impl<cstring> {
Chris@16:     static bool _( cstring source, boost::optional<cstring>& res )
Chris@16:     {
Chris@16:         BOOST_RT_PARAM_TRACE( "In interpret_argument_value_impl<cstring>" );
Chris@16: 
Chris@16:         res = source;
Chris@16: 
Chris@16:         return true;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: // specialization for type bool
Chris@16: template<>
Chris@16: struct interpret_argument_value_impl<bool> {
Chris@16:     static bool _( cstring source, boost::optional<bool>& res )
Chris@16:     {
Chris@16:         BOOST_RT_PARAM_TRACE( "In interpret_argument_value_impl<bool>" );
Chris@16: 
Chris@16:         static literal_cstring YES( BOOST_RT_PARAM_CSTRING_LITERAL( "YES" ) );
Chris@16:         static literal_cstring Y( BOOST_RT_PARAM_CSTRING_LITERAL( "Y" ) );
Chris@16:         static literal_cstring NO( BOOST_RT_PARAM_CSTRING_LITERAL( "NO" ) );
Chris@16:         static literal_cstring N( BOOST_RT_PARAM_CSTRING_LITERAL( "N" ) );
Chris@16:         static literal_cstring one( BOOST_RT_PARAM_CSTRING_LITERAL( "1" ) );
Chris@16:         static literal_cstring zero( BOOST_RT_PARAM_CSTRING_LITERAL( "0" ) );
Chris@16: 
Chris@16:         source.trim();
Chris@16: 
Chris@16:         if( case_ins_eq( source, YES ) || case_ins_eq( source, Y ) || case_ins_eq( source, one ) ) {
Chris@16:             res = true;
Chris@16:             return true;
Chris@16:         }
Chris@16:         else if( case_ins_eq( source, NO ) || case_ins_eq( source, N ) || case_ins_eq( source, zero ) ) {
Chris@16:             res = false;
Chris@16:             return true;
Chris@16:         }
Chris@16:         else {
Chris@16:             res = true;
Chris@16:             return false;
Chris@16:         }
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: template<typename T>
Chris@16: inline bool
Chris@16: interpret_argument_value( cstring source, boost::optional<T>& res, long )
Chris@16: {
Chris@16:     return interpret_argument_value_impl<T>::_( source, res );
Chris@16: }
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: // specialization for list of values
Chris@16: template<typename T>
Chris@16: inline bool
Chris@16: interpret_argument_value( cstring source, boost::optional<std::list<T> >& res, int )
Chris@16: {
Chris@16:     BOOST_RT_PARAM_TRACE( "In interpret_argument_value<std::list<T>>" );
Chris@16: 
Chris@16:     res = std::list<T>();
Chris@16: 
Chris@16:     while( !source.is_empty() ) {
Chris@16:         // !! should we use token_iterator
Chris@16:         cstring::iterator single_value_end = std::find( source.begin(), source.end(), BOOST_RT_PARAM_LITERAL( ',' ) );
Chris@16: 
Chris@16:         boost::optional<T> value;
Chris@16:         interpret_argument_value( cstring( source.begin(), single_value_end ), value, 0 );
Chris@16: 
Chris@16:         res->push_back( *value );
Chris@16: 
Chris@16:         source.trim_left( single_value_end + 1 );
Chris@16:     }
Chris@16: 
Chris@16:     return true;
Chris@16: }
Chris@16: 
Chris@16: //____________________________________________________________________________//
Chris@16: 
Chris@16: } // namespace BOOST_RT_PARAM_NAMESPACE
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_RT_INTERPRET_ARGUMENT_VALUE_HPP_062604GER