90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/*=============================================================================
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Copyright (c) 2002 Jeff Westfahl
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http://spirit.sourceforge.net/
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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///////////////////////////////////////////////////////////////////////////////
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//
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// A parser that echoes a file
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// See the "File Iterator" chapter in the User's Guide.
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//
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// [ JMW 8/05/2002 ]
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/spirit/include/classic_core.hpp>
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#include <boost/spirit/include/classic_file_iterator.hpp>
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#include <iostream>
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///////////////////////////////////////////////////////////////////////////////
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using namespace BOOST_SPIRIT_CLASSIC_NS;
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////////////////////////////////////////////////////////////////////////////
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//
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// Types
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//
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////////////////////////////////////////////////////////////////////////////
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typedef char char_t;
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typedef file_iterator<char_t> iterator_t;
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typedef scanner<iterator_t> scanner_t;
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typedef rule<scanner_t> rule_t;
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////////////////////////////////////////////////////////////////////////////
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//
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// Actions
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//
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////////////////////////////////////////////////////////////////////////////
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void echo(iterator_t first, iterator_t const& last)
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{
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while (first != last)
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std::cout << *first++;
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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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////////////////////////////////////////////////////////////////////////////
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int
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main(int argc, char* argv[])
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{
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if (2 > argc)
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{
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std::cout << "Must specify a filename!\n";
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return -1;
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}
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// Create a file iterator for this file
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iterator_t first(argv[1]);
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if (!first)
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{
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std::cout << "Unable to open file!\n";
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return -1;
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}
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// Create an EOF iterator
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iterator_t last = first.make_end();
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// A simple rule
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rule_t r = *(anychar_p);
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// Parse
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parse_info <iterator_t> info = parse(
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first,
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last,
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r[&echo]
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);
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// This really shouldn't fail...
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if (info.full)
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std::cout << "Parse succeeded!\n";
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else
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std::cout << "Parse failed!\n";
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return 0;
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}
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