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

annotate pygments_lexer_pseudocode2/bases.py @ 34:1f741934205e

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Begin a new Pseudocode lexer using numbers and strings from Python
author Franz Glasner <fzglas.hg@dom66.de>
date Tue, 21 Apr 2026 19:40:08 +0200
parents db1bc740a201
children a3151d837258
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rev   line source
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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 common bases for the lexers."""
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7
34
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8 __all__ = ["LexBase"]
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9
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10
34
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11 from pygments.lexer import RegexLexer, combined, bygroups, include
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12 from pygments.token import Number, String
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13
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14
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15 class LexBase(RegexLexer):
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16
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17 """A base that defines some common lexer states.
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18
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19 Default flags are not important.
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20
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21 """
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22
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23 #
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24 # SPDX-SnippetBegin
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25 # SPDX-License-Identifier: BSD-2-Clause
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26 # SPDX-SnippetCopyrightText: Copyright 2006-2023 by the Pygments team
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27 #
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28 def py_innerstring_rules(ttype):
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29 return [
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30 # the old style '%s' % (...) string formatting (still valid in Py3)
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31 (r'%(\(\w+\))?[-#0 +]*([0-9]+|[*])?(\.([0-9]+|[*]))?'
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32 '[hlL]?[E-GXc-giorsaux%]', String.Interpol),
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33 # the new style '{}'.format(...) string formatting
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34 (r'\{'
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35 r'((\w+)((\.\w+)|(\[[^\]]+\]))*)?' # field name
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36 r'(\![sra])?' # conversion
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37 r'(\:(.?[<>=\^])?[-+ ]?#?0?(\d+)?,?(\.\d+)?[E-GXb-gnosx%]?)?'
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38 r'\}', String.Interpol),
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39 #
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40 # backslashes, quotes and formatting signs must be parsed
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41 # one at a time
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42 #
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43 (r'[^\\\'"%{\n]+', ttype),
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44 (r'[\'"\\]', ttype),
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45 # unhandled string formatting sign
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46 (r'%|(\{{1,2})', ttype)
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47 # newlines are an error (use "nl" state)
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48 ]
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49 # SPDX-SnippetEnd
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50
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51 tokens = {
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52 #
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53 # These states are borrowed from Pygment's Python lexer.
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54 # Their names have been prefixed with `py-'.
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55 #
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56 # SPDX-SnippetBegin
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57 # SPDX-License-Identifier: BSD-2-Clause
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58 # SPDX-SnippetCopyrightText: Copyright 2006-2023 by the Pygments team
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59 #
33
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60 'py-numbers': [
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61 (r'(\d(?:_?\d)*\.(?:\d(?:_?\d)*)?|(?:\d(?:_?\d)*)?\.\d(?:_?\d)*)'
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62 r'([eE][+-]?\d(?:_?\d)*)?', Number.Float),
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63 (r'\d(?:_?\d)*[eE][+-]?\d(?:_?\d)*j?', Number.Float),
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64 (r'0[oO](?:_?[0-7])+', Number.Oct),
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65 (r'0[bB](?:_?[01])+', Number.Bin),
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66 (r'0[xX](?:_?[a-fA-F0-9])+', Number.Hex),
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67 (r'\d(?:_?\d)*', Number.Integer),
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68 ],
34
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69 'py-strings': [
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70 # non-raw strings
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71 ('([uU]?)(""")', bygroups(String.Affix, String.Double),
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72 combined('py-stringescape', 'py-tdqs')),
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73 ("([uU]?)(''')", bygroups(String.Affix, String.Single),
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74 combined('py-stringescape', 'py-tsqs')),
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75 ('([uU]?)(")', bygroups(String.Affix, String.Double),
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76 combined('py-stringescape', 'py-dqs')),
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77 ("([uU]?)(')", bygroups(String.Affix, String.Single),
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78 combined('py-stringescape', 'py-sqs')),
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79 # non-raw bytes
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80 ('([bB])(""")', bygroups(String.Affix, String.Double),
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81 combined('py-bytesescape', 'py-tdqs')),
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82 ("([bB])(''')", bygroups(String.Affix, String.Single),
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83 combined('py-bytesescape', 'py-tsqs')),
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84 ('([bB])(")', bygroups(String.Affix, String.Double),
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85 combined('py-bytesescape', 'py-dqs')),
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86 ("([bB])(')", bygroups(String.Affix, String.Single),
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87 combined('py-bytesescape', 'py-sqs')),
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88 ],
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89 'py-stringescape': [
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90 (r'\\(N\{.*?\}|u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8})', String.Escape),
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91 include('py-bytesescape')
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92 ],
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93 'py-bytesescape': [
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94 (r'\\([\\abfnrtv"\']|\n|x[a-fA-F0-9]{2}|[0-7]{1,3})',
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95 String.Escape)
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96 ],
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97 'py-dqs': [
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98 (r'"', String.Double, '#pop'),
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99 (r'\\\\|\\"|\\\n', String.Escape), # included here for raw strings
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100 include('py-strings-double')
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101 ],
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102 'py-sqs': [
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103 (r"'", String.Single, '#pop'),
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104 (r"\\\\|\\'|\\\n", String.Escape), # included here for raw strings
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105 include('py-strings-single')
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106 ],
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107 'py-tdqs': [
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108 (r'"""', String.Double, '#pop'),
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109 include('py-strings-double'),
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110 (r'\n', String.Double)
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111 ],
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112 'py-tsqs': [
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113 (r"'''", String.Single, '#pop'),
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114 include('py-strings-single'),
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115 (r'\n', String.Single)
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116 ],
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117 'py-strings-single': py_innerstring_rules(String.Single),
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118 'py-strings-double': py_innerstring_rules(String.Double),
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119 # SPDX-SnippetEnd
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120 }