81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright (c) 2001-2010 Hartmut Kaiser
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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///////////////////////////////////////////////////////////////////////////////
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//
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// Several small snippets generating different C++ code constructs
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//
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// [ HK October 08, 2009 ] Spirit V2.2
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/config/warning_disable.hpp>
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#include <boost/spirit/include/karma.hpp>
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#include <boost/spirit/include/phoenix.hpp>
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#include <iostream>
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#include <string>
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#include <complex>
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namespace client
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{
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namespace karma = boost::spirit::karma;
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namespace phoenix = boost::phoenix;
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// create for instance: int name[5] = { 1, 2, 3, 4, 5 };
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template <typename Iterator>
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struct int_array : karma::grammar<Iterator, std::vector<int>()>
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{
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int_array(char const* name) : int_array::base_type(start)
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{
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using karma::int_;
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using karma::uint_;
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using karma::eol;
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using karma::lit;
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using karma::_val;
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using karma::_r1;
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start = array_def(phoenix::size(_val)) << " = " << initializer
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<< ';' << eol;
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array_def = "int " << lit(name) << "[" << uint_(_r1) << "]";
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initializer = "{ " << -(int_ % ", ") << " }";
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}
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karma::rule<Iterator, void(unsigned)> array_def;
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karma::rule<Iterator, std::vector<int>()> initializer;
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karma::rule<Iterator, std::vector<int>()> start;
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};
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typedef std::back_insert_iterator<std::string> iterator_type;
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bool generate_array(char const* name, std::vector<int> const& v)
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{
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std::string generated;
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iterator_type sink(generated);
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int_array<iterator_type> g(name);
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if (karma::generate(sink, g, v))
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{
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std::cout << generated;
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return true;
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}
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return false;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Main program
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///////////////////////////////////////////////////////////////////////////////
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int main()
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{
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// generate an array of integers with initializers
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std::vector<int> v;
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v.push_back(1);
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v.push_back(2);
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v.push_back(3);
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v.push_back(4);
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client::generate_array("array1", v);
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return 0;
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}
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