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76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
// Copyright (c) 2001-2010 Hartmut Kaiser
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// Copyright (c) 2010 Mathias Gaunard
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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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// This test makes sure that the BOL state (begin of line) is properly reset
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// if a token matched at the beginning of a line is discarded using
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// lex::pass_fail.
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// Additionally this test makes sure the syntax 'self("state", "targetstate")'
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// works properly.
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#include <boost/spirit/include/lex_lexertl.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/phoenix/operator/self.hpp>
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#include <sstream>
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namespace spirit = boost::spirit;
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namespace lex = spirit::lex;
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typedef char const* content_iterator;
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typedef lex::lexertl::token<content_iterator> token_type;
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struct lexer
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: lex::lexer<lex::lexertl::actor_lexer<token_type> >
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{
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lexer() : word("^[a-zA-Z0-9]+$", 1)
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{
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self("INITIAL", "O") =
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word
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| lex::string("!.*$") [
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lex::_pass = lex::pass_flags::pass_ignore
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]
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| lex::token_def<>('\n', 2)
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;
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self("O", "INITIAL") =
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lex::string(".") [
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lex::_pass = lex::pass_flags::pass_fail
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]
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;
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}
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lex::token_def<> word;
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};
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typedef lexer::iterator_type token_iterator;
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int main()
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{
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std::string const s = "!foo\nbar\n!baz";
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content_iterator begin = s.data();
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content_iterator end = s.data() + s.size();
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lexer l;
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token_iterator begin2 = l.begin(begin, end);
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token_iterator end2 = l.end();
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std::size_t test_data[] = { 2, 1, 2 };
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std::size_t const test_data_size = sizeof(test_data)/sizeof(test_data[0]);
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token_iterator it = begin2;
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std::size_t i = 0;
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for (/**/; it != end2 && i < test_data_size; ++it, ++i)
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{
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BOOST_TEST(it->id() == test_data[i]);
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}
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BOOST_TEST(it == end2);
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BOOST_TEST(i == test_data_size);
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return boost::report_errors();
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}
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