Mercurial > hgrepos > Python > libs > pygments-lexer-pseudocode2
annotate pygments_lexer_pseudocode2/algpseudocode.py @ 81:6d8b813fb296
Keyword constants like "True", "False", "Nil", "None", "Null" and "Empty"
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Thu, 30 Apr 2026 11:41:21 +0200 |
| parents | f487f0d322a5 |
| children | 36a0ef76a6d7 |
| 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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17 |
| 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 "TEXTSTATE": SYMBOL_TEXTSTATEMENT, |
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90 "TSTATEMENT": SYMBOL_TEXTSTATEMENT, |
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91 "TSTATE": SYMBOL_TEXTSTATEMENT, |
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92 "TEXTBLOCK": SYMBOL_TEXTSTATEMENT, |
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93 "TBLOCK": SYMBOL_TEXTSTATEMENT, |
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94 } |
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95 |
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96 def op_translate(toktype): |
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97 |
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98 def _op_translate(lexer, match, ctx=None): |
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99 kw = match.group().upper() |
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100 yield match.start(), toktype, lexer.TRANSLATIONS.get(kw, kw) |
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101 |
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102 return _op_translate |
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103 |
| 57 | 104 def op_opt_end_translate(toktype): |
| 105 | |
| 106 def _op_end_translate(lexer, match, ctx=None): | |
| 107 if not lexer.no_end: | |
| 108 kw = match.group().upper() | |
| 109 yield (match.start(), | |
| 110 toktype, | |
| 111 lexer.END_TRANSLATIONS.get( | |
| 112 kw, | |
| 113 lexer.DEFAULT_END_PREFIX + kw)) | |
| 114 | |
| 115 return _op_end_translate | |
| 116 | |
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117 def op_opt_ignore(toktype): |
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118 |
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119 def _op_opt_ignore(lexer, match, ctx=None): |
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120 if not lexer.no_end: |
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121 yield match.start(), toktype, match.group() |
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122 |
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123 return _op_opt_ignore |
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124 |
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125 def op_opt_ignore_or_fixed(toktype, value): |
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126 """Yield a fixed given token type and value or -- if the lexer's |
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127 `no_end` setting evals to ``True`` nothing. |
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128 |
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129 """ |
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130 |
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131 def _op_opt_ignore_or_fixed(lexer, match, ctx=None): |
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132 if not lexer.no_end: |
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133 yield match.start(), toktype, value |
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134 |
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135 return _op_opt_ignore_or_fixed |
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136 |
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137 def op_symbol(toktype): |
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138 |
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139 def _op_symbol(lexer, match, ctx=None): |
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140 kw = match.group().upper() |
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141 yield match.start(), toktype, lexer.SYMBOLS.get(kw, kw) |
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142 |
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143 return _op_symbol |
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144 |
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145 tokens = { |
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146 "root": [ |
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147 (r"\n", Whitespace), |
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148 (r"/\*", Comment.Multiline, "multiline-nested-comment"), |
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149 (r"//.*$", Comment.Single), |
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150 include("remark"), |
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151 (r"(?i)\\(block|state(?:ment)?)\s*(\{)", |
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152 bygroups(op_symbol(Text), LexBase.op_fixed(Whitespace, " ")), |
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153 "block-expr"), |
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154 (r"(?i)\\(" |
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155 r"(?:textstate(?:ment)?)" |
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156 r"|(?:tstate(?:ment)?)" |
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157 r"|(?:textblock)" |
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158 r"|(?:tblock)" |
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159 r")\s*(\{)", |
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160 bygroups(op_symbol(Text), LexBase.op_fixed(Whitespace, " ")), |
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161 "text-statement"), |
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162 (r"\\\n", Text), |
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163 (r"(?i)\\(" |
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164 r"(?:prog(?:ram)?)" |
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165 r"|(?:algo(?:rithm)?)" |
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166 r"|(?:proc(?:edure)?)" |
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167 r"|(?:func(?:tion)?|(?:fn))" |
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168 r"|(?:class)" |
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169 r")\s*(\{)", |
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170 bygroups(op_translate(Keyword), |
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171 LexBase.op_fixed(Whitespace, " ")), |
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172 "entity-name"), |
| 57 | 173 # ENDxxx keywords with optional entity name |
| 174 # with name | |
| 175 (r"(?i)\\end(?:_|-)?(" | |
| 176 r"(?:prog(?:ram)?)" | |
| 177 r"|(?:algo(?:rithm)?)" | |
| 178 r"|(?:proc(?:edure)?)" | |
| 179 r"|(?:func(?:tion)?)" | |
| 180 r"|(?:class)" | |
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181 r")\s*(\{)", |
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182 bygroups(op_opt_end_translate(Keyword), |
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183 op_opt_ignore_or_fixed(Whitespace, " ")), |
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184 "entity-name-end"), |
| 57 | 185 # without name |
| 186 (r"(?i)\\end(?:_|-)?(" | |
| 187 r"(?:prog(?:ram)?)" | |
| 188 r"|(?:algo(?:rithm)?)" | |
| 189 r"|(?:proc(?:edure)?)" | |
| 190 r"|(?:func(?:tion)?)" | |
| 191 r"|(?:class)" | |
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192 r")\b", |
| 57 | 193 bygroups(op_opt_end_translate(Keyword))), |
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194 # Keywords |
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195 (r"(?i)\\(" |
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196 r"(?:is)" |
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197 r")\b", |
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198 bygroups(op_translate(Keyword))), |
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199 include("expr"), |
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200 (r"\s+", Text), |
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201 ], |
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202 "remark": [ |
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203 (r"(?i)\\(remark|rem)\b(.*)$", |
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204 bygroups(op_symbol(Comment.Single), Comment.Single)), |
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205 ], |
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206 "entity-name": [ # may be multiline |
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207 (r"[^\\}]+", Name.Entity), |
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208 (r"\}", LexBase.op_ignore, "#pop"), |
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209 (r"\\\}", LexBase.op_fixed(Name.Entity, "}")), |
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210 (r"\\\\", LexBase.op_fixed(Name.Entity, "\\")), |
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211 (r"\\", LexBase.op_fixed(Name.Entity, "\\")), |
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212 ], |
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213 "entity-name-end": [ # may be multiline -- suppressed if no_end |
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214 (r"[^\\}]+", op_opt_ignore(Name.Entity)), |
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215 (r"\}", LexBase.op_ignore, "#pop"), |
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216 (r"\\\}", op_opt_ignore_or_fixed(Name.Entity, "}")), |
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217 (r"\\\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
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218 (r"\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
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219 ], |
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220 "expr": [ |
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221 include("punctuation"), |
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222 include("py-strings"), |
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223 include("py-numbers"), |
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224 (r"(?i)\\text\s*\{", LexBase.op_ignore, "text-in-expr"), |
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225 include("remark"), |
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226 include("keyword-constants"), |
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227 include("text-operators"), |
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228 include("math-builtins"), |
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229 include("py-name"), |
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230 ], |
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231 "expr-in-braces": [ |
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232 include("punctuation-in-braces"), |
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233 include("py-strings"), |
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234 include("py-numbers"), |
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235 (r"(?i)\\text\s*\{", LexBase.op_ignore, "text-in-expr"), |
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236 include("remark"), |
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81
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237 include("keyword-constants"), |
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238 include("text-operators"), |
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239 include("math-builtins"), |
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240 include("py-name"), |
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241 ], |
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242 "block-expr": [ # somewhat similar to "root" |
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243 (r"\}", LexBase.op_ignore, "#pop"), |
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244 (r"\n", Whitespace), |
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245 include("expr-in-braces"), |
|
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246 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
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247 (r"\\", LexBase.op_fixed(Text, "\\")), |
|
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248 (r"\s+", Text), |
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249 ], |
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250 "text-statement": [ # like block but default to text-mode |
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251 (r"[^\\}\n]+", Text), |
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252 (r"\}", LexBase.op_ignore, "#pop"), |
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253 (r"\n", Whitespace), |
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254 (r"\\\}", LexBase.op_fixed(Text, "}")), |
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255 (r"(?i)\\expr(?:ession)?\s*\{", |
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256 LexBase.op_ignore, |
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257 "block-expr"), |
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258 include("remark"), |
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259 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
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260 (r"\\", LexBase.op_fixed(Text, "\\")), |
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261 ], |
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262 "text-in-expr": [ |
|
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263 (r"[^\\}\n]+", Text), |
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264 (r"\}", LexBase.op_ignore, "#pop"), |
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265 (r"\n", Whitespace), |
|
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266 (r"\\\}", LexBase.op_fixed(Text, "}")), |
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267 (r"(?:i)\\(expr(?:ession)?)\s*(\{)", |
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268 bygroups(LexBase.op_ignore, LexBase.op_ignore), |
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269 "expr-in-braces"), |
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270 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
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271 (r"\\", LexBase.op_fixed(Text, "\\")), |
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272 ], |
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273 "math-builtins": [ |
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274 (words(("sqrt", "pow", "cos", "sin", "tan", "arcos", "arcsin", |
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275 "arctan", "arctan2", "mod", "exp", "ln", "log"), |
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276 prefix=r"(?<!\.)", |
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277 suffix=r"\b"), |
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278 Name.Builtin), |
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279 ], |
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280 "text-operators": [ |
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281 (words(("in", "is", "and", "or", "xor", "not"), |
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282 prefix=r"(?<!\.)", |
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283 suffix=r"\b"), |
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284 Operator.Word), |
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285 ], |
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286 "keyword-constants": [ |
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287 (words(("True", "TRUE", "true", "False", "FALSE", "false", |
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288 "None", "NONE", "non", "Nil", "NIL", "nil", |
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289 "Null", "NULL", "null", |
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290 "Empty", "EMPTY", "empty"), |
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291 prefix=r"(?<!\.)", |
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292 suffix=r"\b"), |
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293 Keyword.Constant), |
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294 ], |
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295 "punctuation": [ |
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296 (r"[{}:(),;[\]]", Punctuation), |
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297 ], |
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298 "punctuation-in-braces": [ |
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299 # like "punctuation" but needs an escaped curly brace for } |
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300 (r"\\\}", LexBase.op_fixed(Punctuation, "}")), |
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301 (r"[{:(),;[\]]", Punctuation), |
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302 ], |
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303 } |
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304 |
| 57 | 305 def __init__(self, **options): |
| 306 val = pygments.util.get_bool_opt(options, "no_end", default=False) | |
| 307 self.no_end = val | |
| 308 LexBase.__init__(self, **options) | |
| 309 | |
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310 |
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311 class AlgPseudocodeLexer_DE(AlgPseudocodeLexer): |
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312 |
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313 name = "AlgPseudocodeDE" |
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314 aliases = ["algpseudocode-de", "algpseudo-de"] |
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315 filenames = ["*.algpseudo-de", "*.algpseudocode-de"] |
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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": "PROGRAMM", |
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321 "PROGRAM": "PROGRAMM", |
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322 "ALGO": "ALGORITHMUS", |
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323 "ALGORITHM": "ALGORITHMUS", |
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324 "PROC": "PROZEDUR", |
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325 "PROCEDURE": "PROZEDUR", |
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326 "FUNC": "FUNKTION", |
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327 "FUNCTION": "FUNKTION", |
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328 "FN": "FUNKTION", |
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329 "CLASS": "KLASSE", |
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330 "IS": "IST", |
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331 }) |
| 57 | 332 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 333 END_TRANSLATIONS.update({ | |
| 334 "PROG": "ENDE DES PROGRAMMS", | |
| 335 "PROGRAM": "ENDE VON PROGRAMMS", | |
| 336 "ALGO": "ENDE DES ALGORITHMUS", | |
| 337 "ALGORITHM": "ENDE DES ALGORITHMUS", | |
| 338 "PROC": "ENDE DER PROZEDUR", | |
| 339 "PROCEDURE": "ENDE DER PROZEDUR", | |
| 340 "FUNC": "ENDE DER FUNKTION", | |
| 341 "FUNCTION": "ENDE DER FUNKTION", | |
| 342 "FN": "ENDE DER FUNKTION", | |
| 343 "CLASS": "ENDE DER KLASSE", | |
| 344 }) | |
| 345 DEFAULT_END_PREFIX = "ENDE VON " | |
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346 |
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347 |
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348 class AlgPseudocodeLexer_FR(AlgPseudocodeLexer): |
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349 |
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350 name = "AlgPseudocodeFR" |
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351 aliases = ["algpseudocode-fr", "algpseudo-fr"] |
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352 filenames = ["*.algpseudo-fr", "*.algpseudocode-fr"] |
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353 |
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354 LANG = "de" |
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355 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy() |
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356 TRANSLATIONS.update({ |
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357 "PROG": "PROGRAMME", |
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358 "PROGRAM": "PROGRAMME", |
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359 "ALGO": "ALGORITHME", |
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360 "ALGORITHM": "ALGORITHME", |
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361 "PROC": "PROCÉDURE", |
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362 "PROCEDURE": "PROCÉDURE", |
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363 "FUNC": "FONCTION", |
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364 "FUNCTION": "FOUNCTION", |
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365 "FN": "FONCTION", |
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366 "CLASS": "CLASSE", |
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367 "IS": "EST", |
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368 }) |
| 57 | 369 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 370 END_TRANSLATIONS.update({ | |
| 371 "PROG": "FIN DE PROGRAMME", | |
| 372 "PROGRAM": "FIN DE PROGRAMME", | |
| 373 "ALGO": "FIN D'ALGORITHME", | |
| 374 "ALGORITHM": "FIN D'ALGORITHME", | |
| 375 "PROC": "FIN DE PROCÉDURE", | |
| 376 "PROCEDURE": "FIN DE PROCÉDURE", | |
| 377 "FUNC": "FIN DE FONCTION", | |
| 378 "FUNCTION": "FIN DE FOUNCTION", | |
| 379 "FN": "FIN DE FONCTION", | |
| 380 "CLASS": "FIN DE CLASSE", | |
| 381 }) | |
| 382 DEFAULT_END_PREFIX = "FIN DE " |