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Diffstat (limited to 'boost/spirit/home/x3/support/no_case.hpp')
-rw-r--r-- | boost/spirit/home/x3/support/no_case.hpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/boost/spirit/home/x3/support/no_case.hpp b/boost/spirit/home/x3/support/no_case.hpp new file mode 100644 index 0000000000..2ad3f709c6 --- /dev/null +++ b/boost/spirit/home/x3/support/no_case.hpp @@ -0,0 +1,102 @@ +/*============================================================================= + Copyright (c) 2001-2014 Joel de Guzman + + 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) +==============================================================================*/ +#if !defined(BOOST_SPIRIT_X3_SUPPORT_NO_CASE_SEPT_24_2014_1125PM) +#define BOOST_SPIRIT_X3_SUPPORT_NO_CASE_SEPT_24_2014_1125PM + +#include <boost/spirit/home/x3/support/unused.hpp> +#include <boost/spirit/home/x3/support/context.hpp> +#include <boost/spirit/home/x3/char/char_class_tags.hpp> + +namespace boost { namespace spirit { namespace x3 +{ + struct no_case_tag {}; + + template <typename Encoding> + struct case_compare + { + template < template <typename> class basic_charset> + typename Encoding::char_type + in_set( typename Encoding::char_type const ch + , basic_charset<typename Encoding::char_type> const &set) + { + return set.test(ch); + } + + int32_t operator()( + typename Encoding::char_type const lc + , typename Encoding::char_type const rc) const + { + return lc - rc; + } + + + template <typename CharClassTag> + CharClassTag get_char_class_tag(CharClassTag tag) const + { + return tag; + } + }; + + template <typename Encoding> + struct no_case_compare + { + template < template <typename> class basic_charset> + typename Encoding::char_type + in_set( typename Encoding::char_type const ch + , basic_charset<typename Encoding::char_type> const &set) + { + return set.test(ch) + || set.test(Encoding::islower(ch) ? Encoding::toupper(ch) : Encoding::tolower(ch)); + } + + int32_t operator()( + typename Encoding::char_type const lc + , typename Encoding::char_type const rc) const + { + return Encoding::islower(rc) ? Encoding::tolower(lc) - rc : Encoding::toupper(lc) - rc; + } + + template <typename CharClassTag> + CharClassTag get_char_class_tag(CharClassTag tag) const + { + return tag; + } + + alpha_tag get_char_class_tag(lower_tag ) const + { + return {}; + } + + alpha_tag get_char_class_tag(upper_tag ) const + { + return {}; + } + + }; + + template <typename Encoding> + case_compare<Encoding> get_case_compare_impl(unused_type const&) + { + return {}; + } + + template <typename Encoding> + no_case_compare<Encoding> get_case_compare_impl(no_case_tag const&) + { + return {}; + } + + template <typename Encoding, typename Context> + inline decltype(auto) get_case_compare(Context const& context) + { + return get_case_compare_impl<Encoding>(x3::get<no_case_tag>(context)); + } + auto const no_case_compare_ = no_case_tag{}; + +}}} + +#endif |