[Boost-commit] svn:boost r57871 - trunk/libs/spirit/repository/example/qi

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;
+}