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/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
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)
=============================================================================*/
#if !defined(SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM)
#define SPIRIT_PASS_FUNCTION_FEBRUARY_05_2007_1138AM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/support/unused.hpp>
#include <boost/optional.hpp>
namespace boost { namespace spirit { namespace qi { namespace detail
{
template <typename Iterator, typename Context, typename Skipper>
struct pass_function
{
pass_function(
Iterator& first_, Iterator const& last_
, Context& context_, Skipper const& skipper_)
: first(first_)
, last(last_)
, context(context_)
, skipper(skipper_)
{
}
template <typename Component, typename Attribute>
bool operator()(Component const& component, Attribute& attr)
{
// return true if the parser succeeds
return component.parse(first, last, context, skipper, attr);
}
template <typename Component, typename Attribute>
bool operator()(Component const& component, boost::optional<Attribute>& attr)
{
// return true if the parser succeeds
Attribute val;
if (component.parse(first, last, context, skipper, val))
{
attr = val;
return true;
}
return false;
}
template <typename Component>
bool operator()(Component const& component)
{
// return true if the parser succeeds
return component.parse(first, last, context, skipper, unused);
}
Iterator& first;
Iterator const& last;
Context& context;
Skipper const& skipper;
private:
// silence MSVC warning C4512: assignment operator could not be generated
pass_function& operator= (pass_function const&);
};
}}}}
#endif
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