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File: bool_policies.hpp
/*============================================================================= Copyright (c) 2001-2011 Hartmut Kaiser Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) ==============================================================================*/ #ifndef BOOST_SPIRIT_QI_NUMERIC_BOOL_POLICIES_HPP #define BOOST_SPIRIT_QI_NUMERIC_BOOL_POLICIES_HPP #if defined(_MSC_VER) #pragma once #endif #include <boost/spirit/home/qi/detail/string_parse.hpp> #include <boost/spirit/home/qi/detail/assign_to.hpp> namespace boost { namespace spirit { namespace qi { /////////////////////////////////////////////////////////////////////////// // Default boolean policies /////////////////////////////////////////////////////////////////////////// template <typename T = bool> struct bool_policies { template <typename Iterator, typename Attribute> static bool parse_true(Iterator& first, Iterator const& last, Attribute& attr_) { if (detail::string_parse("true", first, last, unused)) { spirit::traits::assign_to(T(true), attr_); // result is true return true; } return false; } template <typename Iterator, typename Attribute> static bool parse_false(Iterator& first, Iterator const& last, Attribute& attr_) { if (detail::string_parse("false", first, last, unused)) { spirit::traits::assign_to(T(false), attr_); // result is false return true; } return false; } }; /////////////////////////////////////////////////////////////////////////// template <typename T = bool> struct no_case_bool_policies { template <typename Iterator, typename Attribute> static bool parse_true(Iterator& first, Iterator const& last, Attribute& attr_) { if (detail::string_parse("true", "TRUE", first, last, unused)) { spirit::traits::assign_to(T(true), attr_); // result is true return true; } return false; } template <typename Iterator, typename Attribute> static bool parse_false(Iterator& first, Iterator const& last, Attribute& attr_) { if (detail::string_parse("false", "FALSE", first, last, unused)) { spirit::traits::assign_to(T(false), attr_); // result is false return true; } return false; } }; }}} #endif