81 lines
2.8 KiB
C++
Executable File
81 lines
2.8 KiB
C++
Executable File
/*=============================================================================
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Copyright (c) 2001-2007 Joel de Guzman
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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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=============================================================================*/
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#if !defined(SPIRIT_EXPECT_FUNCTION_APR_29_2007_0558PM)
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#define SPIRIT_EXPECT_FUNCTION_APR_29_2007_0558PM
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#include <boost/spirit/home/support/unused.hpp>
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namespace boost { namespace spirit { namespace qi { namespace detail
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{
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template <
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typename Iterator, typename Context
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, typename Skipper, typename Exception>
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struct expect_function
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{
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expect_function(
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Iterator& first, Iterator const& last
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, Context& context, Skipper const& skipper)
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: first(first)
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, last(last)
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, context(context)
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, skipper(skipper)
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, is_first(true)
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{
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}
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template <typename Component, typename Attribute>
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bool operator()(Component const& component, Attribute& attr)
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{
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// if we are testing the first component in the sequence,
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// return true if the parser fails, if this not the first
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// component, throw exception if the parser fails
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typedef typename Component::director director;
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if (!director::parse(component, first, last, context, skipper, attr))
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{
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if (is_first)
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{
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is_first = false;
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return true;
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}
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Exception x = {first, last, director::what(component, context) };
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throw x;
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}
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is_first = false;
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return false;
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}
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template <typename Component>
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bool operator()(Component const& component)
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{
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// if we are testing the first component in the sequence,
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// return true if the parser fails, if this not the first
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// component, throw exception if the parser fails
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typedef typename Component::director director;
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if (!director::parse(component, first, last, context, skipper, unused))
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{
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if (is_first)
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{
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is_first = false;
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return true;
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}
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Exception x = {first, last, director::what(component, context) };
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throw x;
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}
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is_first = false;
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return false;
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}
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Iterator& first;
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Iterator const& last;
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Context& context;
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Skipper const& skipper;
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bool is_first;
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};
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}}}}
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#endif
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