Update of /cvsroot/boost/boost/boost/xpressive/detail/static/transforms
In directory
sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv4198/detail/static/transforms
Modified Files:
transform.hpp
Added Files:
as_action.hpp
Log Message:
add as_action transform
--- NEW FILE: as_action.hpp ---
///////////////////////////////////////////////////////////////////////////////
// as_action.hpp
//
// Copyright 2007 Eric Niebler. 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)
#ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_ACTION_HPP_EAN_04_05_2007
#define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_ACTION_HPP_EAN_04_05_2007
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/mpl/sizeof.hpp>
#include <boost/xpressive/detail/detail_fwd.hpp>
#include <boost/xpressive/detail/static/static.hpp>
#include <boost/xpressive/detail/static/transforms/as_quantifier.hpp>
#include <boost/xpressive/proto/proto.hpp>
#include <boost/xpressive/proto/context.hpp>
#include <boost/xpressive/proto/transform/arg.hpp>
namespace boost { namespace xpressive { namespace detail
{
///////////////////////////////////////////////////////////////////////////////
// action_transform
// turn A[B] into (mark_begin(n) >> A >> mark_end(n) >>
action_matcher<B>(n))
template<typename Grammar>
struct as_action
: Grammar
{
as_action();
template<typename Expr, typename State, typename Visitor>
struct apply
{
typedef typename proto::result_of::left<Expr>::type expr_type;
typedef typename proto::result_of::right<Expr>::type action_type;
typedef typename proto::result_of::deep_copy<action_type>::type
action_copy_type;
typedef
typename InsertMark::apply<expr_type, State, Visitor>::type
marked_expr_type;
typedef
typename mpl::if_<
proto::matches<action_type,
proto::terminal<predicate_placeholder<proto::_> > >
, predicate_matcher<action_copy_type>
, action_matcher<action_copy_type>
>::type
matcher_type;
typedef
typename proto::right_shift<
marked_expr_type
, typename proto::terminal<matcher_type>::type
>::type
type;
};
template<typename Expr, typename State, typename Visitor>
static typename apply<Expr, State, Visitor>::type
call(Expr const &expr, State const &state, Visitor &visitor)
{
typedef apply<Expr, State, Visitor> apply_type;
typedef typename apply_type::matcher_type matcher_type;
typename apply_type::marked_expr_type marked_expr =
marker_transform::call(proto::left(expr), state, visitor);
typename apply_type::type that =
{
marked_expr
, {
matcher_type
(
proto::deep_copy(proto::right(expr))
, proto::arg(proto::left(marked_expr)).mark_number_
)
}
};
return that;
}
};
}}}
#endif
Index: transform.hpp
===================================================================
RCS file:
/cvsroot/boost/boost/boost/xpressive/detail/static/transforms/transform.hpp,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -d -r1.8 -r1.9
--- transform.hpp 6 Apr 2007 02:54:23 -0000 1.8
+++ transform.hpp 6 Apr 2007 05:31:43 -0000 1.9
@@ -26,6 +26,7 @@
#include <boost/xpressive/detail/static/transforms/as_independent.hpp>
#include <boost/xpressive/detail/static/transforms/as_modifier.hpp>
#include <boost/xpressive/detail/static/transforms/as_inverse.hpp>
+#include <boost/xpressive/detail/static/transforms/as_action.hpp>
#include <boost/xpressive/proto/transform/arg.hpp>
#include <boost/xpressive/proto/transform/compose.hpp>
@@ -141,14 +142,15 @@
,
proto::trans::arg<proto::unary_minus<as_default_quantifier<DefaultGreedyQuantifier,
false> > >
, as_marker<Mark>
+ , as_action<proto::subscript<Grammar, proto::_> >
>
{};
struct Grammar
: proto::or_<
proto::trans::reverse_fold<Sequence>
- , proto::trans::compose<Composites, Grammar>
, in_sequence<Matchers>
+ , proto::trans::compose<Composites, Grammar>
, as_modifier<proto::binary_expr<modifier_tag, proto::_, Grammar> >
>
{};
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