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

annotate pygments_lexer_pseudocode2/algpseudocode.py @ 64:05c53e431c88

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Simplify case-handling for "BLOCK" and "REMARK"
author Franz Glasner <fzglas.hg@dom66.de>
date Tue, 28 Apr 2026 12:40:02 +0200
parents 7153e945a3d6
children 3f4223a79d2b
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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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12 __all__ = ["AlgPseudocodeLexer",
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13 "AlgPseudocodeLexer_DE", "AlgPseudocodeLexer_FR"]
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16 import re
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18 import pygments.util
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19 from pygments.lexer import include, bygroups
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20 from pygments.token import (Comment, Keyword, Name, Text, Whitespace)
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22 #
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23 # Relative imports do not work with pygments.lexers.load_lexer_from_file()
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24 # in all of our supported Python releases.
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25 #
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26 from pygments_lexer_pseudocode2.bases import LexBase
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29 class AlgPseudocodeLexer(LexBase):
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31 """A pseudocode lexer along the lines of CTAN's algpseudocode or
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32 algpseudocodex.
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34 Some ideas (e.g. strings) are borrowed from Pygment's Python lexer.
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36 """
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38 name = "AlgPseudocode"
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39 aliases = ["algpseudocode", "algpseudo"]
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40 filenames = ["*.algpseudo", "*.algpseudocode"]
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41 mimetypes = []
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42 flags = re.MULTILINE
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43
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44 LANG = "en"
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45 TRANSLATIONS = {
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46 "PROG": "PROGRAM",
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47 "PROGRAM": "PROGRAM",
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48 "ALGO": "ALGORITHM",
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49 "ALGORITHM": "ALGORITHM",
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50 "PROC": "PROCEDURE",
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51 "PROCEDURE": "PROCEDURE",
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52 "FUNC": "FUNCTION",
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53 "FUNCTION": "FUNCTION",
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54 "FN": "FUNCTION",
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55 "CLASS": "CLASS",
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56 "IS": "IS",
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57 }
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58 END_TRANSLATIONS = {
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59 "PROG": "END OF PROGRAM",
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60 "PROGRAM": "END OF PROGRAM",
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61 "ALGO": "END OF ALGORITHM",
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62 "ALGORITHM": "END OF ALGORITHM",
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63 "PROC": "END OF PROCEDURE",
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64 "PROCEDURE": "END OF PROCEDURE",
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65 "FUNC": "END OF FUNCTION",
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66 "FUNCTION": "END OF FUNCTION",
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67 "FN": "END OF FUNCTION",
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68 "CLASS": "END OF CLASS",
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69 }
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70 DEFAULT_END_PREFIX = "END OF "
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71 SYMBOL_REMARK = "▷" # U+25B7: Unicode 1.0 (Geometric Shapes)
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72 # SYMBOL_REMARK = "▻" # U+25BB: Unicode 1.0 (Geometric Shapes)
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73 SYMBOL_BLOCK = "◆" # U+25C6: Unicode 1.0 (Geometric Shapes)
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74 # SYMBOL_BLOCK = "┃" # U+2503: Unicode 1.0 (Bow Drawing)
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75 # SYMBOL_BLOCK = "●" # U+25CF: Unicode 1.0 (Geometric Shapes)
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76 SYMBOL_TEXTSTATEMENT = "■" # U+25A0: Unicode 1.0 (Geometric Shapes)
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77 SYMBOLS = {
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78 "REMARK": SYMBOL_REMARK,
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79 "REM": SYMBOL_REMARK,
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80 "BLOCK": SYMBOL_BLOCK,
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81 "TEXTSTATEMENT": SYMBOL_TEXTSTATEMENT,
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82 "TSTATEMENT": SYMBOL_TEXTSTATEMENT,
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83 "TSTATE": SYMBOL_TEXTSTATEMENT,
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84 "TEXT": SYMBOL_TEXTSTATEMENT,
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85 }
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86
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87 def op_translate(toktype):
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88
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89 def _op_translate(lexer, match, ctx=None):
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90 kw = match.group().upper()
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91 yield match.start(), toktype, lexer.TRANSLATIONS.get(kw, kw)
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92
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93 return _op_translate
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94
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95 def op_opt_end_translate(toktype):
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96
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97 def _op_end_translate(lexer, match, ctx=None):
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98 if not lexer.no_end:
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99 kw = match.group().upper()
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100 yield (match.start(),
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101 toktype,
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102 lexer.END_TRANSLATIONS.get(
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103 kw,
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104 lexer.DEFAULT_END_PREFIX + kw))
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105
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106 return _op_end_translate
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107
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108 def op_opt_ignore(toktype):
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109
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110 def _op_opt_ignore(lexer, match, ctx=None):
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111 if not lexer.no_end:
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112 yield match.start(), toktype, match.group()
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113
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114 return _op_opt_ignore
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115
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116 def op_symbol(toktype):
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117
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118 def _op_symbol(lexer, match, ctx=None):
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119 kw = match.group().upper()
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120 yield match.start(), toktype, lexer.SYMBOLS.get(kw, kw)
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121
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122 return _op_symbol
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123
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124 tokens = {
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125 "root": [
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126 (r"\n", Whitespace),
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127 (r"/\*", Comment.Multiline, "multiline-nested-comment"),
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128 (r"//.*$", Comment.Single),
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129 (r"(?i)\\(remark|rem)\b(.*)$",
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130 bygroups(op_symbol(Comment.Single), Comment.Single)),
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131 (r"(?i)\\(block)\b(.*)$",
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132 bygroups(op_symbol(Text), Text)),
34
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133 (r"\\\n", Text),
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134 (r"(?i)\\("
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135 r"(?:prog(?:ram)?)"
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136 r"|(?:algo(?:rithm)?)"
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137 r"|(?:proc(?:edure)?)"
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138 r"|(?:func(?:tion)?|(?:fn))"
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139 r"|(?:class)"
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140 r")(\s*)(\{)",
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141 bygroups(op_translate(Keyword), Whitespace, LexBase.op_ignore),
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142 "entity-name"),
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143 # ENDxxx keywords with optional entity name
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144 # with name
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145 (r"(?i)\\end(?:_|-)?("
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146 r"(?:prog(?:ram)?)"
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147 r"|(?:algo(?:rithm)?)"
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148 r"|(?:proc(?:edure)?)"
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149 r"|(?:func(?:tion)?)"
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150 r"|(?:class)"
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151 r")(\s*)(\{)",
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152 bygroups(op_opt_end_translate(Keyword),
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153 op_opt_ignore(Whitespace),
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154 LexBase.op_ignore),
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155 "entity-name-end"),
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156 # without name
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157 (r"(?i)\\end(?:_|-)?("
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158 r"(?:prog(?:ram)?)"
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159 r"|(?:algo(?:rithm)?)"
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160 r"|(?:proc(?:edure)?)"
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diff changeset
161 r"|(?:func(?:tion)?)"
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162 r"|(?:class)"
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163 r")\b",
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164 bygroups(op_opt_end_translate(Keyword))),
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165 # Keywords
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166 (r"(?i)\\("
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167 r"(?:is)"
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168 r")\b",
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169 bygroups(op_translate(Keyword))),
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170 include("expr"),
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171 (r"\s+", Text),
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172 ],
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173 "entity-name": [ # may be multiline
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174 (r"[^\\}]+", Name.Entity),
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175 (r"\\\}", Name.Entity),
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176 (r"\\", Name.Entity),
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177 (r"\}", LexBase.op_ignore, "#pop"),
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178 ],
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179 "entity-name-end": [ # may be multiline -- suppressed if no_end
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180 (r"[^\\}]+", op_opt_ignore(Name.Entity)),
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181 (r"\\\}", op_opt_ignore(Name.Entity)),
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182 (r"\\", op_opt_ignore(Name.Entity)),
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183 (r"\}", LexBase.op_ignore, "#pop"),
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184 ],
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185 "expr": [
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186 include("py-strings"),
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187 include("py-numbers"),
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188 include("py-name"),
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189 ]
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190 }
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191
57
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192 def __init__(self, **options):
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193 val = pygments.util.get_bool_opt(options, "no_end", default=False)
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194 self.no_end = val
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195 LexBase.__init__(self, **options)
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196
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197
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198 class AlgPseudocodeLexer_DE(AlgPseudocodeLexer):
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199
53
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200 name = "AlgPseudocodeDE"
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201 aliases = ["algpseudocode-de", "algpseudo-de"]
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202 filenames = ["*.algpseudo-de", "*.algpseudocode-de"]
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diff changeset
203
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204 LANG = "de"
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205 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy()
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diff changeset
206 TRANSLATIONS.update({
35
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diff changeset
207 "PROG": "PROGRAMM",
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208 "PROGRAM": "PROGRAMM",
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209 "ALGO": "ALGORITHMUS",
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diff changeset
210 "ALGORITHM": "ALGORITHMUS",
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211 "PROC": "PROZEDUR",
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212 "PROCEDURE": "PROZEDUR",
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213 "FUNC": "FUNKTION",
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214 "FUNCTION": "FUNKTION",
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215 "FN": "FUNKTION",
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216 "CLASS": "KLASSE",
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217 "IS": "IST",
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diff changeset
218 })
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219 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy()
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220 END_TRANSLATIONS.update({
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221 "PROG": "ENDE DES PROGRAMMS",
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diff changeset
222 "PROGRAM": "ENDE VON PROGRAMMS",
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223 "ALGO": "ENDE DES ALGORITHMUS",
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224 "ALGORITHM": "ENDE DES ALGORITHMUS",
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diff changeset
225 "PROC": "ENDE DER PROZEDUR",
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diff changeset
226 "PROCEDURE": "ENDE DER PROZEDUR",
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diff changeset
227 "FUNC": "ENDE DER FUNKTION",
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diff changeset
228 "FUNCTION": "ENDE DER FUNKTION",
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diff changeset
229 "FN": "ENDE DER FUNKTION",
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230 "CLASS": "ENDE DER KLASSE",
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diff changeset
231 })
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diff changeset
232 DEFAULT_END_PREFIX = "ENDE VON "
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diff changeset
233
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diff changeset
234
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235 class AlgPseudocodeLexer_FR(AlgPseudocodeLexer):
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diff changeset
236
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diff changeset
237 name = "AlgPseudocodeFR"
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diff changeset
238 aliases = ["algpseudocode-fr", "algpseudo-fr"]
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diff changeset
239 filenames = ["*.algpseudo-fr", "*.algpseudocode-fr"]
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diff changeset
240
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diff changeset
241 LANG = "de"
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diff changeset
242 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy()
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diff changeset
243 TRANSLATIONS.update({
35
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diff changeset
244 "PROG": "PROGRAMME",
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diff changeset
245 "PROGRAM": "PROGRAMME",
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diff changeset
246 "ALGO": "ALGORITHME",
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diff changeset
247 "ALGORITHM": "ALGORITHME",
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diff changeset
248 "PROC": "PROCÉDURE",
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diff changeset
249 "PROCEDURE": "PROCÉDURE",
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diff changeset
250 "FUNC": "FONCTION",
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diff changeset
251 "FUNCTION": "FOUNCTION",
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diff changeset
252 "FN": "FONCTION",
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diff changeset
253 "CLASS": "CLASSE",
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diff changeset
254 "IS": "EST",
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diff changeset
255 })
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diff changeset
256 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy()
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257 END_TRANSLATIONS.update({
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258 "PROG": "FIN DE PROGRAMME",
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259 "PROGRAM": "FIN DE PROGRAMME",
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260 "ALGO": "FIN D'ALGORITHME",
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261 "ALGORITHM": "FIN D'ALGORITHME",
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262 "PROC": "FIN DE PROCÉDURE",
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263 "PROCEDURE": "FIN DE PROCÉDURE",
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264 "FUNC": "FIN DE FONCTION",
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265 "FUNCTION": "FIN DE FOUNCTION",
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266 "FN": "FIN DE FONCTION",
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267 "CLASS": "FIN DE CLASSE",
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268 })
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269 DEFAULT_END_PREFIX = "FIN DE "