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;
+}