class BnfLexer(RegexLexer): (source)
This lexer is for grammar notations which are similar to original BNF. In order to maximize a number of targets of this lexer, let's decide some designs: * We don't distinguish `Terminal Symbol`. * We do assume that `NonTerminal Symbol` are always enclosed with arrow brackets. * We do assume that `NonTerminal Symbol` may include any printable characters except arrow brackets and ASCII 0x20. This assumption is for `RBNF <http://www.rfc-base.org/txt/rfc-5511.txt>`_. * We do assume that target notation doesn't support comment. * We don't distinguish any operators and punctuation except `::=`. Though these decision making might cause too minimal highlighting and you might be disappointed, but it is reasonable for us. .. versionadded:: 2.1
Class Variable | aliases |
Undocumented |
Class Variable | filenames |
Undocumented |
Class Variable | mimetypes |
Undocumented |
Class Variable | name |
Undocumented |
Class Variable | tokens |
Undocumented |
Inherited from RegexLexer
:
Method | get |
Split ``text`` into (tokentype, text) pairs. |
Inherited from Lexer
(via RegexLexer
):
Method | __init__ |
Undocumented |
Method | __repr__ |
Undocumented |
Method | add |
Add a new stream filter to this lexer. |
Method | analyse |
Has to return a float between ``0`` and ``1`` that indicates if a lexer wants to highlight this text. Used by ``guess_lexer``. If this method returns ``0`` it won't highlight it in any case, if it returns ``1`` highlighting with this lexer is guaranteed. |
Method | get |
Return an iterable of (tokentype, value) pairs generated from `text`. If `unfiltered` is set to `True`, the filtering mechanism is bypassed even if filters are defined. |
Class Variable | alias |
Undocumented |
Class Variable | priority |
Undocumented |
Class Variable | url |
Undocumented |
Instance Variable | encoding |
Undocumented |
Instance Variable | ensurenl |
Undocumented |
Instance Variable | filters |
Undocumented |
Instance Variable | options |
Undocumented |
Instance Variable | stripall |
Undocumented |
Instance Variable | stripnl |
Undocumented |
Instance Variable | tabsize |
Undocumented |