Mercurial > hgrepos > Python > libs > pygments-lexer-pseudocode2
annotate pygments_lexer_pseudocode2/algpseudocode.py @ 76:27e12387154d
FIX: Handle escape character more thoroughly: also explicitely handle "\\"
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Thu, 30 Apr 2026 09:20:35 +0200 |
| parents | 711f8d19e27a |
| children | 1a5e192aa950 |
| rev | line source |
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1 |
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2 # -*- coding: utf-8 -*- |
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3 # :- |
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4 # SPDX-FileCopyrightText: © 2026 Franz Glasner |
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5 # SPDX-License-Identifier: MIT |
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6 # :- |
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7 r"""A pseudocode lexer along the lines of CTAN's algpseudocode or |
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8 algpseudocodex. |
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9 |
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10 """ |
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11 |
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12 __all__ = ["AlgPseudocodeLexer", |
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13 "AlgPseudocodeLexer_DE", "AlgPseudocodeLexer_FR"] |
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14 |
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15 |
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16 import re |
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| 57 | 18 import pygments.util |
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19 from pygments.lexer import bygroups, include, words |
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20 from pygments.token import (Comment, Keyword, Name, Operator, Punctuation, |
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21 Text, Whitespace) |
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22 |
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23 # |
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24 # Relative imports do not work with pygments.lexers.load_lexer_from_file() |
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25 # in all of our supported Python releases. |
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26 # |
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27 from pygments_lexer_pseudocode2.bases import LexBase |
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28 |
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29 |
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30 class AlgPseudocodeLexer(LexBase): |
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31 |
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32 """A pseudocode lexer along the lines of CTAN's algpseudocode or |
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33 algpseudocodex. |
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34 |
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35 Some ideas (e.g. strings) are borrowed from Pygment's Python lexer. |
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36 |
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37 """ |
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38 |
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39 name = "AlgPseudocode" |
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40 aliases = ["algpseudocode", "algpseudo"] |
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41 filenames = ["*.algpseudo", "*.algpseudocode"] |
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42 mimetypes = [] |
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43 flags = re.MULTILINE |
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44 |
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45 LANG = "en" |
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46 TRANSLATIONS = { |
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47 "PROG": "PROGRAM", |
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48 "PROGRAM": "PROGRAM", |
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49 "ALGO": "ALGORITHM", |
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50 "ALGORITHM": "ALGORITHM", |
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51 "PROC": "PROCEDURE", |
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52 "PROCEDURE": "PROCEDURE", |
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53 "FUNC": "FUNCTION", |
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54 "FUNCTION": "FUNCTION", |
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55 "FN": "FUNCTION", |
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56 "CLASS": "CLASS", |
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57 "IS": "IS", |
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58 } |
| 57 | 59 END_TRANSLATIONS = { |
| 60 "PROG": "END OF PROGRAM", | |
| 61 "PROGRAM": "END OF PROGRAM", | |
| 62 "ALGO": "END OF ALGORITHM", | |
| 63 "ALGORITHM": "END OF ALGORITHM", | |
| 64 "PROC": "END OF PROCEDURE", | |
| 65 "PROCEDURE": "END OF PROCEDURE", | |
| 66 "FUNC": "END OF FUNCTION", | |
| 67 "FUNCTION": "END OF FUNCTION", | |
| 68 "FN": "END OF FUNCTION", | |
| 69 "CLASS": "END OF CLASS", | |
| 70 } | |
| 71 DEFAULT_END_PREFIX = "END OF " | |
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72 SYMBOL_REMARK = "▷" # U+25B7: Unicode 1.0 (Geometric Shapes) |
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73 # SYMBOL_REMARK = "▻" # U+25BB: Unicode 1.0 (Geometric Shapes) |
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74 SYMBOL_BLOCK = "◆" # U+25C6: Unicode 1.0 (Geometric Shapes) |
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75 # SYMBOL_BLOCK = "┃" # U+2503: Unicode 1.0 (Bow Drawing) |
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76 # SYMBOL_BLOCK = "●" # U+25CF: Unicode 1.0 (Geometric Shapes) |
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77 SYMBOL_TEXTSTATEMENT = "▪" # U+25AA: Unicode 1.0 (Geometric Shapes) |
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78 # SYMBOL_TEXTSTATEMENT = "■" # U+25A0: Unicode 1.0 (Geometric Shapes) |
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79 SYMBOLS = { |
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80 # Group REMARK |
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81 "REMARK": SYMBOL_REMARK, |
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82 "REM": SYMBOL_REMARK, |
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83 # Group STATEMENT |
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84 "STATEMENT": SYMBOL_BLOCK, |
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85 "STATE": SYMBOL_BLOCK, |
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86 "BLOCK": SYMBOL_BLOCK, |
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87 # Group TEXTSTATEMENT |
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88 "TEXTSTATEMENT": SYMBOL_TEXTSTATEMENT, |
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89 "TSTATEMENT": SYMBOL_TEXTSTATEMENT, |
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90 "TSTATE": SYMBOL_TEXTSTATEMENT, |
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91 "TEXTBLOCK": SYMBOL_TEXTSTATEMENT, |
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92 "TBLOCK": SYMBOL_TEXTSTATEMENT, |
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93 } |
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94 |
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95 def op_translate(toktype): |
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96 |
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97 def _op_translate(lexer, match, ctx=None): |
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98 kw = match.group().upper() |
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99 yield match.start(), toktype, lexer.TRANSLATIONS.get(kw, kw) |
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100 |
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101 return _op_translate |
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102 |
| 57 | 103 def op_opt_end_translate(toktype): |
| 104 | |
| 105 def _op_end_translate(lexer, match, ctx=None): | |
| 106 if not lexer.no_end: | |
| 107 kw = match.group().upper() | |
| 108 yield (match.start(), | |
| 109 toktype, | |
| 110 lexer.END_TRANSLATIONS.get( | |
| 111 kw, | |
| 112 lexer.DEFAULT_END_PREFIX + kw)) | |
| 113 | |
| 114 return _op_end_translate | |
| 115 | |
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116 def op_opt_ignore(toktype): |
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117 |
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118 def _op_opt_ignore(lexer, match, ctx=None): |
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119 if not lexer.no_end: |
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120 yield match.start(), toktype, match.group() |
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121 |
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122 return _op_opt_ignore |
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123 |
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124 def op_opt_ignore_or_fixed(toktype, value): |
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125 """Yield a fixed given token type and value or -- if the lexer's |
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126 `no_end` setting evals to ``True`` nothing. |
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127 |
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128 """ |
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129 |
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130 def _op_opt_ignore_or_fixed(lexer, match, ctx=None): |
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131 if not lexer.no_end: |
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132 yield match.start(), toktype, value |
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133 |
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134 return _op_opt_ignore_or_fixed |
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135 |
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136 def op_symbol(toktype): |
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137 |
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138 def _op_symbol(lexer, match, ctx=None): |
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139 kw = match.group().upper() |
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140 yield match.start(), toktype, lexer.SYMBOLS.get(kw, kw) |
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141 |
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142 return _op_symbol |
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143 |
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144 tokens = { |
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145 "root": [ |
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146 (r"\n", Whitespace), |
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147 (r"/\*", Comment.Multiline, "multiline-nested-comment"), |
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148 (r"//.*$", Comment.Single), |
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149 include("remark"), |
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150 (r"(?i)\\(block|state(?:ment)?)\s*(\{)", |
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151 bygroups(op_symbol(Text), LexBase.op_fixed(Whitespace, " ")), |
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152 "block-expr"), |
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153 (r"\\\n", Text), |
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154 (r"(?i)\\(" |
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155 r"(?:prog(?:ram)?)" |
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156 r"|(?:algo(?:rithm)?)" |
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157 r"|(?:proc(?:edure)?)" |
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158 r"|(?:func(?:tion)?|(?:fn))" |
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159 r"|(?:class)" |
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160 r")\s*(\{)", |
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161 bygroups(op_translate(Keyword), |
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162 LexBase.op_fixed(Whitespace, " ")), |
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163 "entity-name"), |
| 57 | 164 # ENDxxx keywords with optional entity name |
| 165 # with name | |
| 166 (r"(?i)\\end(?:_|-)?(" | |
| 167 r"(?:prog(?:ram)?)" | |
| 168 r"|(?:algo(?:rithm)?)" | |
| 169 r"|(?:proc(?:edure)?)" | |
| 170 r"|(?:func(?:tion)?)" | |
| 171 r"|(?:class)" | |
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172 r")\s*(\{)", |
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173 bygroups(op_opt_end_translate(Keyword), |
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174 op_opt_ignore_or_fixed(Whitespace, " ")), |
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175 "entity-name-end"), |
| 57 | 176 # without name |
| 177 (r"(?i)\\end(?:_|-)?(" | |
| 178 r"(?:prog(?:ram)?)" | |
| 179 r"|(?:algo(?:rithm)?)" | |
| 180 r"|(?:proc(?:edure)?)" | |
| 181 r"|(?:func(?:tion)?)" | |
| 182 r"|(?:class)" | |
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183 r")\b", |
| 57 | 184 bygroups(op_opt_end_translate(Keyword))), |
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185 # Keywords |
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186 (r"(?i)\\(" |
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187 r"(?:is)" |
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188 r")\b", |
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189 bygroups(op_translate(Keyword))), |
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190 include("expr"), |
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191 (r"\s+", Text), |
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192 ], |
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193 "remark": [ |
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194 (r"(?i)\\(remark|rem)\b(.*)$", |
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195 bygroups(op_symbol(Comment.Single), Comment.Single)), |
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196 ], |
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197 "entity-name": [ # may be multiline |
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198 (r"[^\\}]+", Name.Entity), |
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199 (r"\\\}", LexBase.op_fixed(Name.Entity, "}")), |
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200 (r"\\\\", LexBase.op_fixed(Name.Entity, "\\")), |
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201 (r"\\", LexBase.op_fixed(Name.Entity, "\\")), |
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202 (r"\}", LexBase.op_ignore, "#pop"), |
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203 ], |
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204 "entity-name-end": [ # may be multiline -- suppressed if no_end |
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205 (r"[^\\}]+", op_opt_ignore(Name.Entity)), |
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206 (r"\\\}", op_opt_ignore_or_fixed(Name.Entity, "}")), |
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207 (r"\\\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
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208 (r"\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
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209 (r"\}", LexBase.op_ignore, "#pop"), |
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210 ], |
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211 "expr": [ |
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212 include("punctuation"), |
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213 include("py-strings"), |
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214 include("py-numbers"), |
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215 (r"(?i)\\text\s*\{", LexBase.op_ignore, "text-in-expr"), |
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216 include("remark"), |
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217 include("text-operators"), |
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218 include("math-builtins"), |
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219 include("py-name"), |
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220 ], |
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221 "block-expr": [ # somewhat similar to "root" |
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222 (r"\}", LexBase.op_ignore, "#pop"), |
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223 (r"\n", Whitespace), |
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224 include("expr-in-braces"), |
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225 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
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226 (r"\\", LexBase.op_fixed(Text, "\\")), |
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227 (r"\s+", Text), |
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228 ], |
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229 "expr-in-braces": [ |
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230 include("punctuation-in-braces"), |
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231 include("py-strings"), |
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232 include("py-numbers"), |
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233 (r"(?i)\\text\s*\{", LexBase.op_ignore, "text-in-expr"), |
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234 include("remark"), |
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235 include("text-operators"), |
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236 include("math-builtins"), |
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237 include("py-name"), |
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238 ], |
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239 "text-in-expr": [ |
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240 (r"[^\\}]+", Text), |
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241 (r"\\\}", LexBase.op_fixed(Text, "}")), |
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242 (r"\\", LexBase.op_fixed(Text, "\\")), |
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243 (r"\}", LexBase.op_ignore, "#pop"), |
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244 ], |
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245 "math-builtins": [ |
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246 (words(("sqrt", "pow", "cos", "sin", "tan", "arcos", "arcsin", |
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247 "arctan", "arctan2", "mod", "exp", "ln", "log"), |
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248 prefix=r"(?<!\.)", |
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249 suffix=r"\b"), |
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250 Name.Builtin), |
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251 ], |
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252 "text-operators": [ |
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253 (words(("in", "is", "and", "or", "xor", "not"), |
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254 prefix=r"(?<!\.)", |
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255 suffix=r"\b"), |
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256 Operator.Word), |
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257 ], |
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258 "punctuation": [ |
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259 (r"[{}:(),;[\]]", Punctuation), |
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260 ], |
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261 "punctuation-in-braces": [ |
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262 # like "punctuation" but needs an escaped curly brace for } |
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263 (r"\\\}", LexBase.op_fixed(Punctuation, "}")), |
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264 (r"[{:(),;[\]]", Punctuation), |
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265 ], |
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266 } |
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267 |
| 57 | 268 def __init__(self, **options): |
| 269 val = pygments.util.get_bool_opt(options, "no_end", default=False) | |
| 270 self.no_end = val | |
| 271 LexBase.__init__(self, **options) | |
| 272 | |
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273 |
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274 class AlgPseudocodeLexer_DE(AlgPseudocodeLexer): |
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275 |
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276 name = "AlgPseudocodeDE" |
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277 aliases = ["algpseudocode-de", "algpseudo-de"] |
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278 filenames = ["*.algpseudo-de", "*.algpseudocode-de"] |
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279 |
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280 LANG = "de" |
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281 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy() |
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282 TRANSLATIONS.update({ |
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283 "PROG": "PROGRAMM", |
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284 "PROGRAM": "PROGRAMM", |
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285 "ALGO": "ALGORITHMUS", |
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286 "ALGORITHM": "ALGORITHMUS", |
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287 "PROC": "PROZEDUR", |
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288 "PROCEDURE": "PROZEDUR", |
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289 "FUNC": "FUNKTION", |
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290 "FUNCTION": "FUNKTION", |
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291 "FN": "FUNKTION", |
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292 "CLASS": "KLASSE", |
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293 "IS": "IST", |
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294 }) |
| 57 | 295 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 296 END_TRANSLATIONS.update({ | |
| 297 "PROG": "ENDE DES PROGRAMMS", | |
| 298 "PROGRAM": "ENDE VON PROGRAMMS", | |
| 299 "ALGO": "ENDE DES ALGORITHMUS", | |
| 300 "ALGORITHM": "ENDE DES ALGORITHMUS", | |
| 301 "PROC": "ENDE DER PROZEDUR", | |
| 302 "PROCEDURE": "ENDE DER PROZEDUR", | |
| 303 "FUNC": "ENDE DER FUNKTION", | |
| 304 "FUNCTION": "ENDE DER FUNKTION", | |
| 305 "FN": "ENDE DER FUNKTION", | |
| 306 "CLASS": "ENDE DER KLASSE", | |
| 307 }) | |
| 308 DEFAULT_END_PREFIX = "ENDE VON " | |
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309 |
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310 |
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311 class AlgPseudocodeLexer_FR(AlgPseudocodeLexer): |
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312 |
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313 name = "AlgPseudocodeFR" |
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314 aliases = ["algpseudocode-fr", "algpseudo-fr"] |
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315 filenames = ["*.algpseudo-fr", "*.algpseudocode-fr"] |
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316 |
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317 LANG = "de" |
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318 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy() |
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319 TRANSLATIONS.update({ |
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320 "PROG": "PROGRAMME", |
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321 "PROGRAM": "PROGRAMME", |
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322 "ALGO": "ALGORITHME", |
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323 "ALGORITHM": "ALGORITHME", |
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324 "PROC": "PROCÉDURE", |
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325 "PROCEDURE": "PROCÉDURE", |
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326 "FUNC": "FONCTION", |
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327 "FUNCTION": "FOUNCTION", |
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328 "FN": "FONCTION", |
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329 "CLASS": "CLASSE", |
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330 "IS": "EST", |
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331 }) |
| 57 | 332 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 333 END_TRANSLATIONS.update({ | |
| 334 "PROG": "FIN DE PROGRAMME", | |
| 335 "PROGRAM": "FIN DE PROGRAMME", | |
| 336 "ALGO": "FIN D'ALGORITHME", | |
| 337 "ALGORITHM": "FIN D'ALGORITHME", | |
| 338 "PROC": "FIN DE PROCÉDURE", | |
| 339 "PROCEDURE": "FIN DE PROCÉDURE", | |
| 340 "FUNC": "FIN DE FONCTION", | |
| 341 "FUNCTION": "FIN DE FOUNCTION", | |
| 342 "FN": "FIN DE FONCTION", | |
| 343 "CLASS": "FIN DE CLASSE", | |
| 344 }) | |
| 345 DEFAULT_END_PREFIX = "FIN DE " |