mirror of
https://github.com/boostorg/parser.git
synced 2026-01-23 05:42:26 +00:00
124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
/**
|
|
* Copyright (C) 2010, 2011, 2012 Object Modeling Designs
|
|
* consultomd.com
|
|
*/
|
|
|
|
//~ #define BOOST_SPIRIT_DEBUG
|
|
|
|
//#define USE_MULTIPASS
|
|
|
|
#include "../yaml/parser/yaml_def.hpp"
|
|
#include "../yaml/parser/flow_def.hpp"
|
|
#include "../yaml/parser/scalar_def.hpp"
|
|
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
#include <boost/spirit/include/support_istream_iterator.hpp>
|
|
#include <boost/spirit/include/classic_position_iterator.hpp>
|
|
|
|
namespace
|
|
{
|
|
template <typename Char>
|
|
bool parse(
|
|
std::basic_istream<Char>& is,
|
|
omd::yaml::ast::value_t& result,
|
|
std::string const& source_file = "")
|
|
{
|
|
#ifdef USE_MULTIPASS
|
|
// no white space skipping in the stream!
|
|
is.unsetf(std::ios::skipws);
|
|
|
|
typedef
|
|
boost::spirit::basic_istream_iterator<Char>
|
|
stream_iterator_type;
|
|
stream_iterator_type sfirst(is);
|
|
stream_iterator_type slast;
|
|
|
|
typedef boost::spirit::line_pos_iterator<stream_iterator_type>
|
|
iterator_type;
|
|
iterator_type first(sfirst);
|
|
iterator_type last(slast);
|
|
#else
|
|
std::string file; // We will read the contents here.
|
|
is.unsetf(std::ios::skipws); // No white space skipping!
|
|
std::copy(
|
|
std::istream_iterator<char>(is),
|
|
std::istream_iterator<char>(),
|
|
std::back_inserter(file));
|
|
|
|
typedef std::string::const_iterator base_iterator_type;
|
|
base_iterator_type sfirst(file.begin());
|
|
base_iterator_type slast(file.end());
|
|
#endif
|
|
typedef boost::spirit::classic::position_iterator<base_iterator_type>
|
|
iterator_type;
|
|
iterator_type first(sfirst, slast);
|
|
iterator_type last;
|
|
first.set_tabchars(1);
|
|
|
|
omd::yaml::parser::yaml<iterator_type> p(source_file);
|
|
|
|
using boost::spirit::qi::parse;
|
|
return parse(first, last, p, result);
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Main program
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
int main(int argc, char **argv)
|
|
{
|
|
char const* filename = NULL;
|
|
if (argc > 1)
|
|
{
|
|
filename = argv[1];
|
|
}
|
|
else
|
|
{
|
|
std::cerr << "Error: No input file provided." << std::endl;
|
|
return 1;
|
|
}
|
|
|
|
std::ifstream in(filename, std::ios_base::in);
|
|
|
|
if (!in)
|
|
{
|
|
std::cerr << "Error: Could not open input file: "
|
|
<< filename << std::endl;
|
|
return 1;
|
|
}
|
|
|
|
// Ignore the BOM marking the beginning of a UTF-8 file in Windows
|
|
char c = in.peek();
|
|
if (c == '\xef')
|
|
{
|
|
char s[4];
|
|
in >> s[0] >> s[1] >> s[2];
|
|
s[3] = '\0';
|
|
if (s != std::string("\xef\xbb\xbf"))
|
|
{
|
|
std::cerr << "Error: Unexpected characters from input file: "
|
|
<< filename << std::endl;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
using omd::yaml::ast::value_t;
|
|
namespace qi = boost::spirit::qi;
|
|
|
|
value_t result;
|
|
if (parse(in, result, filename))
|
|
{
|
|
std::cout << "success: \n";
|
|
omd::yaml::ast::print_yaml(std::cout, result);
|
|
std::cout << std::endl;
|
|
}
|
|
else
|
|
{
|
|
std::cout << "parse error" << std::endl;
|
|
}
|
|
|
|
return 1;
|
|
}
|