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+// (C) Copyright Gennadiy Rozental 2005-2008.
+// 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)
+
+// See http://www.boost.org/libs/test for the library home page.
+//
+// File : $RCSfile$
+//
+// Version : $Revision: 54633 $
+//
+// Description : defines and implements inline model of program environment
+// ***************************************************************************
+
+#ifndef BOOST_RT_ENV_ENVIRONMENT_HPP_062604GER
+#define BOOST_RT_ENV_ENVIRONMENT_HPP_062604GER
+
+#ifdef UNDER_CE
+#error Windows CE does not support environment variables.
+#endif
+
+// Boost.Runtime.Parameter
+#include <boost/test/utils/runtime/config.hpp>
+#include <boost/test/utils/runtime/fwd.hpp>
+#include <boost/test/utils/runtime/argument.hpp>
+#include <boost/test/utils/runtime/interpret_argument_value.hpp>
+
+#include <boost/test/utils/runtime/env/fwd.hpp>
+#include <boost/test/utils/runtime/env/modifier.hpp>
+#include <boost/test/utils/runtime/env/variable.hpp>
+
+// Boost.Test
+#include <boost/test/utils/callback.hpp>
+
+// Boost
+#include <boost/optional.hpp>
+
+namespace boost {
+
+namespace BOOST_RT_PARAM_NAMESPACE {
+
+// ************************************************************************** //
+// ************** runtime::environment implementation ************** //
+// ************************************************************************** //
+
+namespace environment {
+
+namespace rt_env_detail {
+
+template<typename T, typename Modifiers>
+variable_data&
+init_new_var( cstring var_name, Modifiers m = nfp::no_params )
+{
+ rt_env_detail::variable_data& new_vd = new_var_record( var_name );
+
+ cstring str_value = sys_read_var( new_vd.m_var_name );
+
+ if( !str_value.is_empty() ) {
+ try {
+ boost::optional<T> value;
+
+ if( m.has( interpreter ) )
+ m[interpreter]( str_value, value );
+ else
+ interpret_argument_value( str_value, value, 0 );
+
+ if( !!value ) {
+ new_vd.m_value.reset( new typed_argument<T>( new_vd ) );
+
+ arg_value<T>( *new_vd.m_value ) = *value;
+ }
+ }
+ catch( ... ) { // !! could we do that
+ // !! should we report an error?
+ }
+ }
+
+ if( !new_vd.m_value && m.has( default_value ) ) {
+ new_vd.m_value.reset( new typed_argument<T>( new_vd ) );
+
+ nfp::optionally_assign( arg_value<T>( *new_vd.m_value ), m[default_value] );
+ }
+
+ nfp::optionally_assign( new_vd.m_global_id, m, global_id );
+
+ return new_vd;
+}
+
+//____________________________________________________________________________//
+
+} // namespace rt_env_detail
+
+} // namespace environment
+
+// ************************************************************************** //
+// ************** runtime::environment ************** //
+// ************************************************************************** //
+
+namespace environment {
+
+ // variable access
+ variable_base
+ var( cstring var_name );
+
+ //________________________________________________________________________//
+
+ template<typename T>
+ inline variable<T>
+ var( cstring var_name )
+ {
+ rt_env_detail::variable_data* vd = rt_env_detail::find_var_record( var_name );
+
+ return environment::variable<T>( !vd ? rt_env_detail::init_new_var<T>( var_name, nfp::no_params ) : *vd );
+ }
+
+ //________________________________________________________________________//
+
+ template<typename T, typename Modifiers>
+ inline variable<T>
+ var( cstring var_name, Modifiers const& m )
+ {
+ rt_env_detail::variable_data* vd = rt_env_detail::find_var_record( var_name );
+
+ return environment::variable<T>( !vd ? rt_env_detail::init_new_var<T>( var_name, m ) : *vd );
+ }
+
+ //________________________________________________________________________//
+
+ // direct variable value access
+ inline cstring
+ get( cstring var_name )
+ {
+ return environment::var<cstring>( var_name ).value();
+ }
+
+ //________________________________________________________________________//
+
+ template<typename T>
+ inline T const&
+ get( cstring var_name )
+ {
+ return environment::var<T>( var_name ).value();
+ }
+
+ //________________________________________________________________________//
+
+ template<typename T>
+ inline void
+ get( cstring var_name, boost::optional<T>& res )
+ {
+ variable<T> const& v = environment::var<T>( var_name );
+ v.value( res );
+ }
+
+ //________________________________________________________________________//
+
+} // namespace environment
+
+namespace env = environment;
+
+} // namespace BOOST_RT_PARAM_NAMESPACE
+
+} // namespace boost
+
+#ifndef BOOST_RT_PARAM_OFFLINE
+
+#define BOOST_RT_PARAM_INLINE inline
+#include <boost/test/utils/runtime/env/environment.ipp>
+
+#endif
+
+#endif // BOOST_RT_ENV_ENVIRONMENT_HPP_062604GER