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Base classes for prompt_toolkit lexers.
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Base class for all lexers.
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Takes a :class:`~prompt_toolkit.document.Document` and returns a
callable that takes a line number and returns a list of
``(style_str, text)`` tuples for that line.
XXX: Note that in the past, this was supposed to return a list
of ``(Token, text)`` tuples, just like a Pygments lexer.
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When this changes, `lex_document` could give a different output.
(Only used for `DynamicLexer`.)
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Lexer that doesn't do any tokenizing and returns the whole input as one
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:param style: The style string for this lexer.
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Lexer class that can dynamically returns any Lexer.
:param get_lexer: Callable that returns a :class:`.Lexer` instance.
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