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112 lines
2.9 KiB
C++
112 lines
2.9 KiB
C++
/**
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* Copyright (C) 2010, 2011, 2012 Object Modeling Designs
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* consultomd.com
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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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#define BOOST_SPIRIT_DEBUG
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#include "../yaml/parser/yaml.hpp"
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#include <iostream>
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#include <fstream>
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#include <boost/spirit/include/classic_position_iterator.hpp>
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namespace
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{
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template <typename Char>
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bool parse(
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std::basic_istream<Char>& is,
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omd::yaml::ast::value_t& result,
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std::string const& source_file = "")
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{
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std::string file; // We will read the contents here.
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is.unsetf(std::ios::skipws); // No white space skipping!
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std::copy(
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std::istream_iterator<char>(is),
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std::istream_iterator<char>(),
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std::back_inserter(file));
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typedef std::string::const_iterator base_iterator_type;
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base_iterator_type sfirst(file.begin());
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base_iterator_type slast(file.end());
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typedef boost::spirit::classic::position_iterator<base_iterator_type>
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iterator_type;
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iterator_type first(sfirst, slast);
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iterator_type last;
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first.set_tabchars(1);
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omd::yaml::parser::yaml<iterator_type> p(source_file);
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using boost::spirit::qi::parse;
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return parse(first, last, p, result);
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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(int argc, char **argv)
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{
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char const* filename = NULL;
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if (argc > 1)
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{
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filename = argv[1];
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}
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else
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{
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std::cerr << "Error: No input file provided." << std::endl;
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return 1;
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}
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std::ifstream in(filename, std::ios_base::in);
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if (!in)
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{
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std::cerr << "Error: Could not open input file: "
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<< filename << std::endl;
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return 1;
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}
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// Ignore the BOM marking the beginning of a UTF-8 file in Windows
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char c = in.peek();
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if (c == '\xef')
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{
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char s[4];
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in >> s[0] >> s[1] >> s[2];
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s[3] = '\0';
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if (s != std::string("\xef\xbb\xbf"))
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{
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std::cerr << "Error: Unexpected characters from input file: "
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<< filename << std::endl;
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return 1;
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}
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}
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using omd::yaml::ast::value_t;
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namespace qi = boost::spirit::qi;
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value_t result;
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if (parse(in, result, filename))
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{
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std::cout << "success: \n";
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// link the aliases
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omd::yaml::ast::link_yaml(result);
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// print the result (2-spaces indent with all aliases expanded)
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omd::yaml::ast::print_yaml<2, true>(std::cout, result);
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std::cout << std::endl;
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}
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else
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{
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std::cout << "parse error" << std::endl;
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}
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return 0;
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}
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