[Boost-commit] svn:boost r56747 - trunk/libs/spirit/example/karma

Subject: [Boost-commit] svn:boost r56747 - trunk/libs/spirit/example/karma
From: hartmut.kaiser_at_[hidden]
Date: 2009-10-12 13:44:50

Author: hkaiser
Date: 2009-10-12 13:44:49 EDT (Mon, 12 Oct 2009)
New Revision: 56747
URL: http://svn.boost.org/trac/boost/changeset/56747

Log:
Spirit: added new Karma example
Added:
   trunk/libs/spirit/example/karma/generate_code.cpp   (contents, props changed)

Added: trunk/libs/spirit/example/karma/generate_code.cpp
==============================================================================
--- (empty file)
+++ trunk/libs/spirit/example/karma/generate_code.cpp	2009-10-12 13:44:49 EDT (Mon, 12 Oct 2009)
@@ -0,0 +1,79 @@
+//   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)
+
+///////////////////////////////////////////////////////////////////////////////
+//
+//  Several small snippets generating different C++ code constructs
+//
+//  [ HK October 08, 2009 ]  Spirit V2.2
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include <boost/config/warning_disable.hpp>
+#include <boost/spirit/include/karma.hpp>
+#include <boost/spirit/include/phoenix.hpp>
+
+#include <iostream>
+#include <string>
+#include <complex>
+
+namespace client
+{
+    namespace karma = boost::spirit::karma;
+    namespace phoenix = boost::phoenix;
+
+    // create for instance: int name[5] = { 1, 2, 3, 4, 5 };
+    template <typename Iterator>
+    struct int_array : karma::grammar<Iterator, std::vector<int>()>
+    {
+        int_array(char const* name) : int_array::base_type(start)
+        {
+            using karma::int_;
+            using karma::uint_;
+            using karma::eol;
+            using karma::lit;
+            using karma::_val;
+            using karma::_r1;
+
+            start = array_def(phoenix::size(_val)) << " = " << initializer << eol;
+            array_def = "int " << lit(name) << "[" << uint_(_r1) << "]";
+            initializer = "{ " << -(int_ % ", ") << " };";
+        }
+
+        karma::rule<Iterator, void(unsigned)> array_def;
+        karma::rule<Iterator, std::vector<int>()> initializer;
+        karma::rule<Iterator, std::vector<int>()> start;
+    };
+
+    typedef std::back_insert_iterator<std::string> iterator_type;
+    bool generate_array(char const* name, std::vector<int> const& v)
+    {
+        std::string generated;
+        iterator_type sink(generated);
+        int_array<iterator_type> g(name);
+        if (karma::generate(sink, g, v))
+        {
+            std::cout << generated;
+            return true;
+        }
+        return false;
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//  Main program
+///////////////////////////////////////////////////////////////////////////////
+int main()
+{
+    // generate an array of integers with initializers
+    std::vector<int> v;
+    v.push_back(1);
+    v.push_back(2);
+    v.push_back(3);
+    v.push_back(4);
+    client::generate_array("array1", v);
+
+    return 0;
+}