51 lines
1.0 KiB
C++
51 lines
1.0 KiB
C++
// char_traits.hpp
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// Copyright (c) 2005-2012 Ben Hanson (http://www.benhanson.net/)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef LEXERTL_CHAR_TRAITS_H
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#define LEXERTL_CHAR_TRAITS_H
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#include <cstddef>
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namespace lexertl
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{
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template<typename ch_type>
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struct basic_char_traits
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{
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typedef ch_type char_type;
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typedef ch_type index_type;
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static index_type index (const char_type ch)
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{
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return ch;
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}
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static index_type max_val ()
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{
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return sizeof(char_type) > 2 ? 0x10ffff :
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static_cast<index_type>(~0);
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}
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};
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template<>
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struct basic_char_traits<char>
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{
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typedef char char_type;
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typedef unsigned char index_type;
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static index_type index (const char ch)
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{
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return static_cast<index_type>(ch);
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}
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static index_type max_val ()
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{
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return static_cast<index_type>(~0);
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}
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};
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}
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#endif
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