| [/============================================================================== |
| Copyright (C) 2001-2010 Hartmut Kaiser |
| Copyright (C) 2001-2010 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) |
| ===============================================================================/] |
| |
| [section:primitives Token definition Primitives] |
| |
| This module includes different primitives allowing you to create token definitions. |
| It includes `char_`, character literals, `string`, and string literals. |
| |
| [heading Module Headers] |
| |
| // forwards to <boost/spirit/home/lex/primitives.hpp> |
| #include <boost/spirit/include/lex_primitives.hpp> |
| |
| Also, see __include_structure__. |
| |
| [/////////////////////////////////////////////////////////////////////////////] |
| [section:char_tokendef Tokens Matching Single Characters] |
| |
| [heading Description] |
| |
| The character based token definitions described in this section are: |
| |
| The `char_` creates token definitions matching single characters. The `char_` |
| token definition is associated `standard` encoding namespace. This is |
| needed when doing basic operations such as forcing lower or upper case and |
| dealing with character ranges. |
| |
| [heading Header] |
| |
| [heading Module Headers] |
| |
| // forwards to <boost/spirit/home/lex/lexer/char_token_def.hpp> |
| #include <boost/spirit/include/lex_char_token_def.hpp> |
| |
| Also, see __include_structure__. |
| |
| [heading Namespace] |
| |
| [table |
| [[Name]] |
| [[`boost::spirit::lit // alias: boost::spirit::lex::lit` ]] |
| [[`lex::char_`]] |
| ] |
| |
| [heading Model of] |
| |
| [:__primitive_lexer_concept__] |
| |
| [variablelist Notation |
| [[`ch`] [Character-class specific character from `standard` character |
| set.]] |
| ] |
| |
| [heading Expression Semantics] |
| |
| Semantics of an expression is defined only where it differs from, or is not |
| defined in __primitive_lexer_concept__. |
| |
| [table |
| [[Expression] [Description]] |
| [[`ch`] [Create a token definition matching the character |
| literal `ch`. ]] |
| [[`lit(ch)`] [Create a token definition matching the character |
| literal `ch`. ]] |
| [[`lex::char_(ch)`] [Create a token definition matching the character |
| `ch`.]] |
| ] |
| |
| [heading Example] |
| |
| |
| [endsect] [/ char] |
| |
| [endsect] [/ Module] |