62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2004 Hartmut Kaiser
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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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// This is a compile only test for verifying, whether the multi_pass<>
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// iterator works ok with an input iterator, which returns a value_type and not
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// a reference from its dereferencing operator.
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#include <cstdio>
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#include <fstream>
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#include <iterator>
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#include <boost/spirit/include/classic_core.hpp>
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#include <boost/spirit/include/classic_multi_pass.hpp>
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using namespace BOOST_SPIRIT_CLASSIC_NS;
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using namespace std;
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int main ()
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{
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// create a sample file
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{
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ofstream out("./input_file.txt");
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out << 1.0 << "," << 2.0;
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}
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int result = 0;
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// read in the values from the sample file
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{
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ifstream in("./input_file.txt"); // we get our input from this file
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typedef char char_t;
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typedef multi_pass<istreambuf_iterator<char_t> > iterator_t;
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typedef skip_parser_iteration_policy<space_parser> it_policy_t;
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typedef scanner_policies<it_policy_t> scan_policies_t;
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typedef scanner<iterator_t, scan_policies_t> scanner_t;
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typedef rule<scanner_t> rule_t;
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it_policy_t iter_policy(space_p);
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scan_policies_t policies(iter_policy);
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iterator_t first(make_multi_pass(std::istreambuf_iterator<char_t>(in)));
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scanner_t scan(first, make_multi_pass(std::istreambuf_iterator<char_t>()),
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policies);
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rule_t n_list = real_p >> *(',' >> real_p);
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match<> m = n_list.parse(scan);
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result = !m ? 1 : 0;
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}
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std::remove("./input_file.txt");
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return result;
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}
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