Subject: [Boost-commit] svn:boost r57871 - trunk/libs/spirit/repository/example/qi
From: hartmut.kaiser_at_[hidden]
Date: 2009-11-23 13:42:59
Author: hkaiser
Date: 2009-11-23 13:42:58 EST (Mon, 23 Nov 2009)
New Revision: 57871
URL: http://svn.boost.org/trac/boost/changeset/57871
Log:
Spirit: moved iter_pos parser to repository, added example
Added:
trunk/libs/spirit/repository/example/qi/iter_pos_parser.cpp (contents, props changed)
Added: trunk/libs/spirit/repository/example/qi/iter_pos_parser.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/repository/example/qi/iter_pos_parser.cpp 2009-11-23 13:42:58 EST (Mon, 23 Nov 2009)
@@ -0,0 +1,51 @@
+// Copyright (c) 2001-2009 Hartmut Kaiser
+//
+// 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)
+
+// The purpose of this example is to show how a simple custom primitive parser
+// component can be written. We develop a custom parser exposing the current
+// iterator position as its attribute.
+//
+// For more information see: http://spirit.sourceforge.net/home/?page_id=567
+
+#include <boost/spirit/include/qi_parse_attr.hpp>
+#include <boost/spirit/include/qi_char.hpp>
+#include <boost/spirit/include/qi_operator.hpp>
+#include <boost/spirit/repository/include/qi_iter_pos.hpp>
+
+#include <string>
+
+namespace qi = boost::spirit::qi;
+
+int main()
+{
+ using boost::spirit::repository::qi::iter_pos;
+
+ std::string prefix, suffix; // attributes receiving the
+ std::string::iterator position; // parsed values
+
+ std::string input("prefix1234567");
+ std::string::iterator first = input.begin();
+ bool result =
+ qi::parse(first, input.end()
+ , +qi::alpha >> iter_pos >> +qi::digit
+ , prefix, position, suffix);
+
+ if (result)
+ {
+ std::cout << "-------------------------------- \n";
+ std::cout << "Parsing succeeded\n";
+ std::cout << "prefix is: " << prefix << "\n";
+ std::cout << "suffix is: " << suffix << "\n";
+ std::cout << "position is: " << std::distance(input.begin(), position) << "\n";
+ std::cout << "-------------------------------- \n";
+ }
+ else
+ {
+ std::cout << "-------------------------------- \n";
+ std::cout << "Parsing failed\n";
+ std::cout << "-------------------------------- \n";
+ }
+ return 0;
+}