[Boost-commit] svn:boost r57646 - trunk/libs/spirit/example/qi

Subject: [Boost-commit] svn:boost r57646 - trunk/libs/spirit/example/qi
From: hartmut.kaiser_at_[hidden]
Date: 2009-11-14 08:54:22

Author: hkaiser
Date: 2009-11-14 08:54:22 EST (Sat, 14 Nov 2009)
New Revision: 57646
URL: http://svn.boost.org/trac/boost/changeset/57646

Log:
Spirit: added new Qi example
Added:
   trunk/libs/spirit/example/qi/key_value_sequence.cpp   (contents, props changed)
Text files modified: 
   trunk/libs/spirit/example/qi/Jamfile |     1 +                                       
   1 files changed, 1 insertions(+), 0 deletions(-)

Modified: trunk/libs/spirit/example/qi/Jamfile
==============================================================================
--- trunk/libs/spirit/example/qi/Jamfile	(original)
+++ trunk/libs/spirit/example/qi/Jamfile	2009-11-14 08:54:22 EST (Sat, 14 Nov 2009)
@@ -25,6 +25,7 @@
 exe num_list4 : num_list4.cpp ;
 exe reorder_struct : reorder_struct.cpp ;
 exe parse_date : parse_date.cpp ;
+exe key_value_sequence : key_value_sequence.cpp ;
 
 exe calculator1 : calc1.cpp ;
 exe calculator2 : calc2.cpp ;

Added: trunk/libs/spirit/example/qi/key_value_sequence.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/example/qi/key_value_sequence.cpp	2009-11-14 08:54:22 EST (Sat, 14 Nov 2009)
@@ -0,0 +1,71 @@
+//  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)
+
+#include <boost/spirit/include/qi.hpp>
+#include <boost/fusion/include/std_pair.hpp>
+
+#include <iostream>
+#include <map>
+
+namespace client
+{
+    namespace spirit = boost::spirit;
+    namespace qi = boost::spirit::qi;
+
+    template <typename Iterator>
+    struct key_value_sequence 
+      : qi::grammar<Iterator, std::map<std::string, std::string>()>
+    {
+        key_value_sequence()
+          : key_value_sequence::base_type(query)
+        {
+            query =  pair >> *((qi::lit(';') | '&') >> pair);
+            pair  =  key >> -('=' >> value);
+            key   =  qi::char_("a-zA-Z_") >> *qi::char_("a-zA-Z_0-9");
+            value = +qi::char_("a-zA-Z_0-9");
+        }
+
+        qi::rule<Iterator, std::map<std::string, std::string>()> query;
+        qi::rule<Iterator, std::pair<std::string, std::string>()> pair;
+        qi::rule<Iterator, std::string()> key, value;
+    };
+}
+
+///////////////////////////////////////////////////////////////////////////////
+int main()
+{
+    namespace qi = boost::spirit::qi;
+
+    std::string input("key1=value1;key2;key3=value3");
+    std::string::iterator begin = input.begin();
+    std::string::iterator end = input.end();
+
+    client::key_value_sequence<std::string::iterator> g;
+    std::map<std::string, std::string> m;
+
+    if (!qi::parse(begin, end, g, m))
+    {
+        std::cout << "-------------------------------- \n";
+        std::cout << "Parsing failed\n";
+        std::cout << "-------------------------------- \n";
+    }
+    else
+    {
+        std::cout << "-------------------------------- \n";
+        std::cout << "Parsing succeeded, found entries:\n";
+        std::map<std::string, std::string>::iterator end = m.end();
+        for (std::map<std::string, std::string>::iterator it = m.begin();
+             it != end; ++it)
+        {
+            std::cout << (*it).first;
+            if (!(*it).second.empty())
+                std::cout << "=" << (*it).second;
+            std::cout << std::endl;
+        }
+        std::cout << "---------------------------------\n";
+    }
+    return 0;
+}
+