// Copyright (c) 2001-2011 Hartmut Kaiser
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// Copyright (c) 2010 Bryce Lelbach
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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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#if !defined(BOOST_SPIRIT_KARMA_CHAR_FEB_21_2007_0543PM)
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#define BOOST_SPIRIT_KARMA_CHAR_FEB_21_2007_0543PM
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/spirit/home/support/common_terminals.hpp>
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#include <boost/spirit/home/support/string_traits.hpp>
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#include <boost/spirit/home/support/info.hpp>
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#include <boost/spirit/home/support/char_class.hpp>
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#include <boost/spirit/home/support/detail/get_encoding.hpp>
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#include <boost/spirit/home/support/char_set/basic_chset.hpp>
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/karma/meta_compiler.hpp>
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#include <boost/spirit/home/karma/delimit_out.hpp>
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#include <boost/spirit/home/karma/char/char_generator.hpp>
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#include <boost/spirit/home/karma/auxiliary/lazy.hpp>
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#include <boost/spirit/home/karma/detail/get_casetag.hpp>
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#include <boost/spirit/home/karma/detail/generate_to.hpp>
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#include <boost/spirit/home/karma/detail/enable_lit.hpp>
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#include <boost/fusion/include/at.hpp>
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#include <boost/fusion/include/vector.hpp>
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#include <boost/fusion/include/cons.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <string>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit
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{
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///////////////////////////////////////////////////////////////////////////
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// Enablers
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///////////////////////////////////////////////////////////////////////////
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template <typename CharEncoding>
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struct use_terminal<karma::domain
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, tag::char_code<tag::char_, CharEncoding> // enables char_
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> : mpl::true_ {};
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template <typename CharEncoding, typename A0>
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struct use_terminal<karma::domain
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, terminal_ex<
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tag::char_code<tag::char_, CharEncoding> // enables char_('x'), char_("x")
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, fusion::vector1<A0>
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>
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> : mpl::true_ {};
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template <typename A0>
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struct use_terminal<karma::domain
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, terminal_ex<tag::lit, fusion::vector1<A0> > // enables lit('x')
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, typename enable_if<traits::is_char<A0> >::type>
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: mpl::true_ {};
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template <typename CharEncoding, typename A0, typename A1>
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struct use_terminal<karma::domain
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, terminal_ex<
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tag::char_code<tag::char_, CharEncoding> // enables char_('a','z')
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, fusion::vector2<A0, A1>
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>
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> : mpl::true_ {};
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template <typename CharEncoding> // enables *lazy* char_('x'), char_("x")
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struct use_lazy_terminal<
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karma::domain
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, tag::char_code<tag::char_, CharEncoding>
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, 1 // arity
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> : mpl::true_ {};
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template <>
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struct use_terminal<karma::domain, char> // enables 'x'
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: mpl::true_ {};
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template <>
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struct use_terminal<karma::domain, char[2]> // enables "x"
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: mpl::true_ {};
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template <>
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struct use_terminal<karma::domain, wchar_t> // enables L'x'
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: mpl::true_ {};
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template <>
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struct use_terminal<karma::domain, wchar_t[2]> // enables L"x"
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: mpl::true_ {};
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}}
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit { namespace karma
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{
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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using spirit::lit; // lit('x') is equivalent to 'x'
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#endif
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using spirit::lit_type;
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///////////////////////////////////////////////////////////////////////////
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//
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// any_char
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// generates a single character from the associated attribute
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//
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// Note: this generator has to have an associated attribute
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//
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///////////////////////////////////////////////////////////////////////////
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template <typename CharEncoding, typename Tag>
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struct any_char
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: char_generator<any_char<CharEncoding, Tag>, CharEncoding, Tag>
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{
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typedef typename CharEncoding::char_type char_type;
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typedef CharEncoding char_encoding;
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template <typename Context, typename Unused>
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struct attribute
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{
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typedef char_type type;
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};
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// any_char has an attached parameter
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template <typename Attribute, typename CharParam, typename Context>
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bool test(Attribute const& attr, CharParam& ch, Context&) const
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{
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ch = CharParam(attr);
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return true;
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}
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// any_char has no attribute attached, it needs to have been
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// initialized from a direct literal
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template <typename CharParam, typename Context>
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bool test(unused_type, CharParam&, Context&) const
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{
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// It is not possible (doesn't make sense) to use char_ without
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// providing any attribute, as the generator doesn't 'know' what
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// character to output. The following assertion fires if this
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// situation is detected in your code.
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BOOST_SPIRIT_ASSERT_FAIL(CharParam, char_not_usable_without_attribute, ());
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return false;
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}
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template <typename Context>
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static info what(Context const& /*context*/)
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{
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return info("any-char");
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}
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};
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///////////////////////////////////////////////////////////////////////////
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//
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// literal_char
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// generates a single character given by a literal it was initialized
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// from
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//
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///////////////////////////////////////////////////////////////////////////
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template <typename CharEncoding, typename Tag, bool no_attribute>
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struct literal_char
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: char_generator<literal_char<CharEncoding, Tag, no_attribute>
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, CharEncoding, Tag>
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{
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typedef typename CharEncoding::char_type char_type;
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typedef CharEncoding char_encoding;
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literal_char(char_type ch)
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: ch (spirit::char_class::convert<char_encoding>::to(Tag(), ch))
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{}
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template <typename Context, typename Unused>
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struct attribute
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: mpl::if_c<no_attribute, unused_type, char_type>
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{};
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// A char_('x') which additionally has an associated attribute emits
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// its immediate literal only if it matches the attribute, otherwise
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// it fails.
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// any_char has an attached parameter
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template <typename Attribute, typename CharParam, typename Context>
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bool test(Attribute const& attr, CharParam& ch_, Context&) const
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{
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// fail if attribute isn't matched my immediate literal
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ch_ = static_cast<char_type>(attr);
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return attr == ch;
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}
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// A char_('x') without any associated attribute just emits its
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// immediate literal
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template <typename CharParam, typename Context>
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bool test(unused_type, CharParam& ch_, Context&) const
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{
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ch_ = ch;
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return true;
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}
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template <typename Context>
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info what(Context const& /*context*/) const
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{
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return info("literal-char", char_encoding::toucs4(ch));
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}
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char_type ch;
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};
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///////////////////////////////////////////////////////////////////////////
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// char range generator
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template <typename CharEncoding, typename Tag>
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struct char_range
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: char_generator<char_range<CharEncoding, Tag>, CharEncoding, Tag>
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{
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typedef typename CharEncoding::char_type char_type;
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typedef CharEncoding char_encoding;
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char_range(char_type from, char_type to)
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: from(spirit::char_class::convert<char_encoding>::to(Tag(), from))
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, to(spirit::char_class::convert<char_encoding>::to(Tag(), to))
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{}
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// A char_('a', 'z') which has an associated attribute emits it only if
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// it matches the character range, otherwise it fails.
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template <typename Attribute, typename CharParam, typename Context>
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bool test(Attribute const& attr, CharParam& ch, Context&) const
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{
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// fail if attribute doesn't belong to character range
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ch = attr;
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return (from <= char_type(attr)) && (char_type(attr) <= to);
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}
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// A char_('a', 'z') without any associated attribute fails compiling
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template <typename CharParam, typename Context>
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bool test(unused_type, CharParam&, Context&) const
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{
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// It is not possible (doesn't make sense) to use char_ generators
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// without providing any attribute, as the generator doesn't 'know'
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// what to output. The following assertion fires if this situation
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// is detected in your code.
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BOOST_SPIRIT_ASSERT_FAIL(CharParam
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, char_range_not_usable_without_attribute, ());
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return false;
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}
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template <typename Context>
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info what(Context& /*context*/) const
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{
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info result("char-range", char_encoding::toucs4(from));
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boost::get<std::string>(result.value) += '-';
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boost::get<std::string>(result.value) += to_utf8(char_encoding::toucs4(to));
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return result;
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}
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char_type from, to;
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};
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///////////////////////////////////////////////////////////////////////////
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// character set generator
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template <typename CharEncoding, typename Tag, bool no_attribute>
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struct char_set
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: char_generator<char_set<CharEncoding, Tag, no_attribute>
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, CharEncoding, Tag>
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{
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typedef typename CharEncoding::char_type char_type;
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typedef CharEncoding char_encoding;
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template <typename Context, typename Unused>
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struct attribute
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: mpl::if_c<no_attribute, unused_type, char_type>
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{};
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template <typename String>
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char_set(String const& str)
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{
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typedef typename traits::char_type_of<String>::type in_type;
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BOOST_SPIRIT_ASSERT_MSG((
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(sizeof(char_type) == sizeof(in_type))
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), cannot_convert_string, (String));
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typedef spirit::char_class::convert<char_encoding> convert_type;
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char_type const* definition =
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(char_type const*)traits::get_c_string(str);
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char_type ch = convert_type::to(Tag(), *definition++);
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while (ch)
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{
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char_type next = convert_type::to(Tag(), *definition++);
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if (next == '-')
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{
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next = convert_type::to(Tag(), *definition++);
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if (next == 0)
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{
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chset.set(ch);
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chset.set('-');
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break;
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}
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chset.set(ch, next);
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}
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else
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{
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chset.set(ch);
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}
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ch = next;
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}
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}
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// A char_("a-z") which has an associated attribute emits it only if
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// it matches the character set, otherwise it fails.
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template <typename Attribute, typename CharParam, typename Context>
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bool test(Attribute const& attr, CharParam& ch, Context&) const
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{
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// fail if attribute doesn't belong to character set
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ch = attr;
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return chset.test(char_type(attr));
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}
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// A char_("a-z") without any associated attribute fails compiling
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template <typename CharParam, typename Context>
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bool test(unused_type, CharParam&, Context&) const
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{
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// It is not possible (doesn't make sense) to use char_ generators
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// without providing any attribute, as the generator doesn't 'know'
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// what to output. The following assertion fires if this situation
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// is detected in your code.
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BOOST_SPIRIT_ASSERT_FAIL(CharParam
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, char_set_not_usable_without_attribute, ());
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return false;
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}
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template <typename Context>
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info what(Context& /*context*/) const
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{
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return info("char-set");
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}
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support::detail::basic_chset<char_type> chset;
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};
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///////////////////////////////////////////////////////////////////////////
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// Generator generators: make_xxx function (objects)
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///////////////////////////////////////////////////////////////////////////
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namespace detail
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{
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template <typename Modifiers, typename Encoding>
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struct basic_literal
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef literal_char<
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typename spirit::detail::get_encoding_with_case<
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Modifiers, Encoding, lower || upper>::type
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, typename get_casetag<Modifiers, lower || upper>::type
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, true>
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result_type;
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template <typename Char>
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result_type operator()(Char ch, unused_type) const
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{
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return result_type(ch);
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}
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template <typename Char>
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result_type operator()(Char const* str, unused_type) const
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{
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return result_type(str[0]);
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}
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};
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}
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// literals: 'x', "x"
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template <typename Modifiers>
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struct make_primitive<char, Modifiers>
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: detail::basic_literal<Modifiers, char_encoding::standard> {};
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template <typename Modifiers>
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struct make_primitive<char const(&)[2], Modifiers>
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: detail::basic_literal<Modifiers, char_encoding::standard> {};
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// literals: L'x', L"x"
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template <typename Modifiers>
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struct make_primitive<wchar_t, Modifiers>
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: detail::basic_literal<Modifiers, char_encoding::standard_wide> {};
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template <typename Modifiers>
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struct make_primitive<wchar_t const(&)[2], Modifiers>
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: detail::basic_literal<Modifiers, char_encoding::standard_wide> {};
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// char_
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template <typename CharEncoding, typename Modifiers>
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struct make_primitive<tag::char_code<tag::char_, CharEncoding>, Modifiers>
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef any_char<
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typename spirit::detail::get_encoding_with_case<
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Modifiers, CharEncoding, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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> result_type;
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result_type operator()(unused_type, unused_type) const
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{
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return result_type();
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}
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};
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///////////////////////////////////////////////////////////////////////////
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namespace detail
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{
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template <typename CharEncoding, typename Modifiers, typename A0
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, bool no_attribute>
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struct make_char_direct
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef typename spirit::detail::get_encoding_with_case<
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Modifiers, CharEncoding, lower || upper>::type encoding;
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typedef typename detail::get_casetag<
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Modifiers, lower || upper>::type tag;
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typedef typename mpl::if_<
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traits::is_string<A0>
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, char_set<encoding, tag, no_attribute>
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, literal_char<encoding, tag, no_attribute>
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>::type result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, unused_type) const
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{
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return result_type(fusion::at_c<0>(term.args));
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}
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};
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}
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// char_(...), lit(...)
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template <typename CharEncoding, typename Modifiers, typename A0>
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struct make_primitive<
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terminal_ex<
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tag::char_code<tag::char_, CharEncoding>
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, fusion::vector1<A0> >
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, Modifiers>
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: detail::make_char_direct<CharEncoding, Modifiers, A0, false>
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{};
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template <typename Modifiers, typename A0>
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struct make_primitive<
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terminal_ex<tag::lit, fusion::vector1<A0> >
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, Modifiers
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, typename enable_if<traits::is_char<A0> >::type>
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: detail::make_char_direct<
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typename traits::char_encoding_from_char<
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typename traits::char_type_of<A0>::type>::type
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, Modifiers, A0, true>
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{};
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///////////////////////////////////////////////////////////////////////////
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// char_("x")
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template <typename CharEncoding, typename Modifiers, typename Char>
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struct make_primitive<
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terminal_ex<
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tag::char_code<tag::char_, CharEncoding>
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, fusion::vector1<Char(&)[2]> > // For single char strings
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, Modifiers>
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef literal_char<
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typename spirit::detail::get_encoding_with_case<
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Modifiers, CharEncoding, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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, false
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> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, unused_type) const
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{
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return result_type(fusion::at_c<0>(term.args)[0]);
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}
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};
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///////////////////////////////////////////////////////////////////////////
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// char_('a', 'z')
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template <typename CharEncoding, typename Modifiers, typename A0, typename A1>
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struct make_primitive<
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terminal_ex<
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tag::char_code<tag::char_, CharEncoding>
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, fusion::vector2<A0, A1>
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>
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, Modifiers>
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef char_range<
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typename spirit::detail::get_encoding_with_case<
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Modifiers, CharEncoding, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, unused_type) const
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{
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return result_type(fusion::at_c<0>(term.args)
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, fusion::at_c<1>(term.args));
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}
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};
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template <typename CharEncoding, typename Modifiers, typename Char>
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struct make_primitive<
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terminal_ex<
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tag::char_code<tag::char_, CharEncoding>
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, fusion::vector2<Char(&)[2], Char(&)[2]> // For single char strings
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>
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, Modifiers>
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{
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static bool const lower =
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value;
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static bool const upper =
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value;
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typedef char_range<
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typename spirit::detail::get_encoding_with_case<
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Modifiers, CharEncoding, lower || upper>::type
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, typename detail::get_casetag<Modifiers, lower || upper>::type
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> result_type;
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template <typename Terminal>
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result_type operator()(Terminal const& term, unused_type) const
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{
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return result_type(fusion::at_c<0>(term.args)[0]
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, fusion::at_c<1>(term.args)[0]);
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}
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};
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}}} // namespace boost::spirit::karma
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#endif
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