[Boost-commit] svn:boost r58501 - trunk/libs/spirit/example/karma

Subject: [Boost-commit] svn:boost r58501 - trunk/libs/spirit/example/karma
From: hartmut.kaiser_at_[hidden]
Date: 2009-12-22 17:00:58

Author: hkaiser
Date: 2009-12-22 17:00:57 EST (Tue, 22 Dec 2009)
New Revision: 58501
URL: http://svn.boost.org/trac/boost/changeset/58501

Log:
Spirit: added new Karma example
Added:
   trunk/libs/spirit/example/karma/quoted_strings.cpp   (contents, props changed)
Text files modified: 
   trunk/libs/spirit/example/karma/Jamfile             |     1 +                                       
   trunk/libs/spirit/example/karma/auto_facilities.cpp |     5 +++--                                   
   2 files changed, 4 insertions(+), 2 deletions(-)

Modified: trunk/libs/spirit/example/karma/Jamfile
==============================================================================
--- trunk/libs/spirit/example/karma/Jamfile	(original)
+++ trunk/libs/spirit/example/karma/Jamfile	2009-12-22 17:00:57 EST (Tue, 22 Dec 2009)
@@ -30,4 +30,5 @@
 exe karma_reorder_struct : reorder_struct.cpp ;
 exe karma_escaped_string : escaped_string.cpp ;
 exe simple_columns_directive : simple_columns_directive.cpp ;
+exe quoted_strings : quoted_strings.cpp ;
 

Modified: trunk/libs/spirit/example/karma/auto_facilities.cpp
==============================================================================
--- trunk/libs/spirit/example/karma/auto_facilities.cpp	(original)
+++ trunk/libs/spirit/example/karma/auto_facilities.cpp	2009-12-22 17:00:57 EST (Tue, 22 Dec 2009)
@@ -33,7 +33,6 @@
 #include <boost/fusion/include/array.hpp>
 
 #include <boost/spirit/include/karma.hpp>
-#include <boost/mpl/print.hpp>
 
 using namespace boost::spirit;
 using namespace boost::spirit::ascii;
@@ -52,7 +51,9 @@
     // (the ':') which normally gets embedded in the proto expression by 
     // reference only. The deep copy converts the proto tree to hold this by 
     // value. The deep copy operation can be left out for simpler proto 
-    // expressions (not containing references to temporaries).
+    // expressions (not containing references to temporaries). Alternatively
+    // you could use the proto::make_expr() facility to build the required
+    // proto expression.
     template <>
     struct create_generator<std::pair<int const, std::string> >
     {

Added: trunk/libs/spirit/example/karma/quoted_strings.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/example/karma/quoted_strings.cpp	2009-12-22 17:00:57 EST (Tue, 22 Dec 2009)
@@ -0,0 +1,70 @@
+//  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 demonstrate how to utilize alternatives 
+//  and the built in matching capabilities of Karma generators to emit output 
+//  in different formats based on the content of an attribute (not its type).
+
+#include <boost/config/warning_disable.hpp>
+
+#include <string>
+#include <vector>
+
+#include <boost/spirit/include/karma.hpp>
+#include <boost/spirit/include/phoenix_stl.hpp>
+
+namespace client
+{
+    namespace karma = boost::spirit::karma;
+    namespace phx = boost::phoenix;
+
+    template <typename OutputIterator>
+    struct quoted_strings
+      : karma::grammar<OutputIterator, std::vector<std::string>()>
+    {
+        quoted_strings()
+          : quoted_strings::base_type(strings)
+        {
+            strings = (bareword | qstring) % ' ';
+            bareword = karma::repeat(phx::size(karma::_val))
+                          [ karma::alnum | karma::char_("-.,_$") ];
+            qstring = '"' << karma::string << '"';
+        }
+
+        karma::rule<OutputIterator, std::vector<std::string>()> strings;
+        karma::rule<OutputIterator, std::string()> bareword, qstring;
+    };
+}
+
+int main()
+{
+    namespace karma = boost::spirit::karma;
+
+    typedef std::back_insert_iterator<std::string> sink_type;
+
+    std::string generated;
+    sink_type sink(generated);
+
+    std::vector<std::string> v;
+    v.push_back("foo");
+    v.push_back("bar baz");
+    v.push_back("hello");
+
+    client::quoted_strings<sink_type> g;
+    if (!karma::generate(sink, g, v))
+    {
+        std::cout << "-------------------------\n";
+        std::cout << "Generating failed\n";
+        std::cout << "-------------------------\n";
+    }
+    else
+    {
+        std::cout << "-------------------------\n";
+        std::cout << "Generated: " << generated << "\n";
+        std::cout << "-------------------------\n";
+    }
+    return 0;
+}
+