77 lines
2.2 KiB
Plaintext
77 lines
2.2 KiB
Plaintext
[/==============================================================================
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Copyright (C) 2001-2011 Hartmut Kaiser
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Copyright (C) 2001-2011 Joel de Guzman
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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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===============================================================================/]
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[section:primitives Token definition Primitives]
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This module includes different primitives allowing you to create token definitions.
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It includes `char_`, character literals, `string`, and string literals.
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[heading Module Headers]
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// forwards to <boost/spirit/home/lex/primitives.hpp>
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#include <boost/spirit/include/lex_primitives.hpp>
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Also, see __include_structure__.
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[/////////////////////////////////////////////////////////////////////////////]
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[section:char_tokendef Tokens Matching Single Characters]
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[heading Description]
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The character based token definitions described in this section are:
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The `char_` creates token definitions matching single characters. The `char_`
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token definition is associated `standard` encoding namespace. This is
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needed when doing basic operations such as forcing lower or upper case and
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dealing with character ranges.
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[heading Header]
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[heading Module Headers]
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// forwards to <boost/spirit/home/lex/lexer/char_token_def.hpp>
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#include <boost/spirit/include/lex_char_token_def.hpp>
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Also, see __include_structure__.
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[heading Namespace]
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[table
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[[Name]]
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[[`lex::char_`]]
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]
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[heading Model of]
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[:__primitive_lexer_concept__]
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[variablelist Notation
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[[`ch`] [Character-class specific character from `standard` character
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set.]]
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]
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[heading Expression Semantics]
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Semantics of an expression is defined only where it differs from, or is not
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defined in __primitive_lexer_concept__.
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[table
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[[Expression] [Description]]
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[[`ch`] [Create a token definition matching the character
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literal `ch`. ]]
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[[`lex::char_(ch)`] [Create a token definition matching the character
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`ch`.]]
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]
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[heading Example]
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[endsect] [/ char]
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[endsect] [/ Module]
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