Mercurial > hgrepos > Python > libs > pygments-lexer-pseudocode2

annotate pygments_lexer_pseudocode2/utils.py @ 297:cd22c2e8390d

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===== signature for changeset d8442a5b5718
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 23 May 2026 12:40:50 +0200
parents 298841bc4dee
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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ae5e741d2a9b Optimize op_explicit_tokentype(): use a pref-computed reversed pygments.token.STANDARD_TYPES
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1 # -*- coding: utf-8; -*-
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2 # :-
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3 # SPDX-FileCopyrightText: © 2026 Franz Glasner
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4 # SPDX-License-Identifier: MIT
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5 # :-
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6 r"""Some helper utility functions and data.
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7
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8 """
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9
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10 __all__ = [
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11 "REVERSED_STANDARD_TYPES",
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12 "string_to_defined_tokentype",
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13 ]
85
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16 import pygments.token
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19 REVERSED_STANDARD_TYPES = {}
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21 # Side-effect on import
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22 for _toktype, _cssstyle in pygments.token.STANDARD_TYPES.items():
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23 REVERSED_STANDARD_TYPES[_cssstyle] = _toktype
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24 del _toktype, _cssstyle
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27 def string_to_defined_tokentype(s):
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28 """Determine whether the token type `s` given as string is defined.
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29
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30 :param str s: A token type string as in
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31 :py:func:`pygments.token.string_to_tokentype`.
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32 :returns: An **existing** token if
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33 :py:func:`pygments.token.string_to_tokentype`
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34 would return an already existing token type,
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35 :py:obj:`None` otherwise.
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36 :rtype: :py:class:`pygments.token._TokenType` or :py:obj:`None`
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38 This implementation is needed because
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39 :py:func:`pygments.token.string_to_tokentype` synthesizes a new token
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40 on not yet existing token types.
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41 And :py:func:`is_token_subtype` works only on token instances.
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43 """
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44 ttype = pygments.token.Token
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45 ttype_prefix = "Token."
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46 if not s:
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47 return ttype
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48 for part in s.split("."):
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49 for subtype in ttype.subtypes:
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50 subtypename = str(subtype)
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51 # Remove prefix
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52 assert subtypename.startswith(ttype_prefix)
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53 subtypename = subtypename[len(ttype_prefix):]
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54 if subtypename == part:
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55 ttype = subtype
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56 ttype_prefix += "%s." % (part,)
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57 break
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58 else:
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59 return None
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60 return ttype