Mercurial > hgrepos > Python > libs > pygments-lexer-pseudocode2
annotate pygments_lexer_pseudocode2/algpseudocode.py @ 94:dc17b778a52b
Refactor \END variants
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Sun, 03 May 2026 15:13:43 +0200 |
| parents | 84c0f761c836 |
| children | 98cd0787f62f |
| 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"""A pseudocode lexer along the lines of CTAN's algpseudocode or |
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7 algpseudocodex. |
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8 |
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9 """ |
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10 |
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11 __all__ = ["AlgPseudocodeLexer", |
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12 "AlgPseudocodeLexer_DE", "AlgPseudocodeLexer_FR"] |
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13 |
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14 |
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15 import logging |
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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, Generic, Keyword, Name, Operator, |
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21 Punctuation, 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 from pygments_lexer_pseudocode2.utils import REVERSED_STANDARD_TYPES |
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29 |
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30 |
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31 # |
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32 # As in the local imports: use an explicit name because __name__ is |
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33 # __builtins__ |
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34 # |
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35 _logger = logging.getLogger("pygments_lexer_pseudocode2.algpseudocode") |
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36 |
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37 |
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38 class AlgPseudocodeLexer(LexBase): |
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39 |
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40 """A pseudocode lexer along the lines of CTAN's algpseudocode or |
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41 algpseudocodex. |
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42 |
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43 Some ideas (e.g. strings) are borrowed from Pygment's Python lexer. |
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44 |
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45 """ |
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46 |
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47 name = "AlgPseudocode" |
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48 aliases = ["algpseudocode", "algpseudo"] |
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49 filenames = ["*.algpseudo", "*.algpseudocode"] |
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50 mimetypes = [] |
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51 flags = re.MULTILINE |
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52 |
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53 LANG = "en" |
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54 TRANSLATIONS = { |
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55 "PROG": "PROGRAM", |
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56 "PROGRAM": "PROGRAM", |
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57 "ALGO": "ALGORITHM", |
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58 "ALGORITHM": "ALGORITHM", |
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59 "PROC": "PROCEDURE", |
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60 "PROCEDURE": "PROCEDURE", |
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61 "FUNC": "FUNCTION", |
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62 "FUNCTION": "FUNCTION", |
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63 "FN": "FUNCTION", |
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64 "CLASS": "CLASS", |
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65 "IS": "IS", |
| 82 | 66 "WITH": "WITH", |
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67 } |
| 57 | 68 END_TRANSLATIONS = { |
| 69 "PROG": "END OF PROGRAM", | |
| 70 "PROGRAM": "END OF PROGRAM", | |
| 71 "ALGO": "END OF ALGORITHM", | |
| 72 "ALGORITHM": "END OF ALGORITHM", | |
| 73 "PROC": "END OF PROCEDURE", | |
| 74 "PROCEDURE": "END OF PROCEDURE", | |
| 75 "FUNC": "END OF FUNCTION", | |
| 76 "FUNCTION": "END OF FUNCTION", | |
| 77 "FN": "END OF FUNCTION", | |
| 78 "CLASS": "END OF CLASS", | |
| 79 } | |
| 80 DEFAULT_END_PREFIX = "END OF " | |
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81 SYMBOL_REMARK = "▷" # U+25B7: Unicode 1.0 (Geometric Shapes) |
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82 # SYMBOL_REMARK = "▻" # U+25BB: Unicode 1.0 (Geometric Shapes) |
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83 SYMBOL_BLOCK = "◆" # U+25C6: Unicode 1.0 (Geometric Shapes) |
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84 # SYMBOL_BLOCK = "┃" # U+2503: Unicode 1.0 (Bow Drawing) |
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85 # SYMBOL_BLOCK = "●" # U+25CF: Unicode 1.0 (Geometric Shapes) |
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86 SYMBOL_TEXTSTATEMENT = "▪" # U+25AA: Unicode 1.0 (Geometric Shapes) |
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87 # SYMBOL_TEXTSTATEMENT = "■" # U+25A0: Unicode 1.0 (Geometric Shapes) |
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88 SYMBOLS = { |
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89 # Group REMARK |
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90 "REMARK": SYMBOL_REMARK, |
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91 "REM": SYMBOL_REMARK, |
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92 # Group STATEMENT |
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93 "STATEMENT": SYMBOL_BLOCK, |
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94 "STATE": SYMBOL_BLOCK, |
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95 "BLOCK": SYMBOL_BLOCK, |
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96 # Group TEXTSTATEMENT |
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97 "TEXTSTATEMENT": SYMBOL_TEXTSTATEMENT, |
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98 "TEXTSTATE": SYMBOL_TEXTSTATEMENT, |
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99 "TSTATEMENT": SYMBOL_TEXTSTATEMENT, |
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100 "TSTATE": SYMBOL_TEXTSTATEMENT, |
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101 "TEXTBLOCK": SYMBOL_TEXTSTATEMENT, |
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102 "TBLOCK": SYMBOL_TEXTSTATEMENT, |
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103 } |
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104 |
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105 def op_translate(toktype): |
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106 |
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107 def _op_translate(lexer, match, ctx=None): |
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108 kw = match.group().upper() |
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109 yield match.start(), toktype, lexer.TRANSLATIONS.get(kw, kw) |
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110 if ctx: |
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111 ctx.pos = match.end() |
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112 |
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113 return _op_translate |
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114 |
| 57 | 115 def op_opt_end_translate(toktype): |
| 116 | |
| 117 def _op_end_translate(lexer, match, ctx=None): | |
| 118 if not lexer.no_end: | |
| 119 kw = match.group().upper() | |
| 120 yield (match.start(), | |
| 121 toktype, | |
| 122 lexer.END_TRANSLATIONS.get( | |
| 123 kw, | |
| 124 lexer.DEFAULT_END_PREFIX + kw)) | |
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125 if ctx: |
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126 ctx.pos = match.end() |
| 57 | 127 |
| 128 return _op_end_translate | |
| 129 | |
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130 def op_opt_ignore(toktype): |
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131 |
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132 def _op_opt_ignore(lexer, match, ctx=None): |
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133 if not lexer.no_end: |
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134 yield match.start(), toktype, match.group() |
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135 if ctx: |
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136 ctx.pos = match.end() |
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137 |
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138 return _op_opt_ignore |
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139 |
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140 def op_opt_ignore_or_fixed(toktype, value): |
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141 """Yield a fixed given token type and value or -- if the lexer's |
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142 `no_end` setting evals to ``True`` nothing. |
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143 |
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144 """ |
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145 |
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146 def _op_opt_ignore_or_fixed(lexer, match, ctx=None): |
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147 if not lexer.no_end: |
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148 yield match.start(), toktype, value |
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149 if ctx: |
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150 ctx.pos = match.end() |
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151 |
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152 return _op_opt_ignore_or_fixed |
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153 |
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154 def op_symbol(toktype): |
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155 |
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156 def _op_symbol(lexer, match, ctx=None): |
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157 kw = match.group().upper() |
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158 yield match.start(), toktype, lexer.SYMBOLS.get(kw, kw) |
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159 if ctx: |
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160 ctx.pos = match.end() |
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161 |
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162 return _op_symbol |
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163 |
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164 def op_explicit_tokentype(lexer, match, ctx=None): |
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165 needed_css = match.group("type") |
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166 toktype = REVERSED_STANDARD_TYPES.get(needed_css, None) |
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167 if toktype is None: |
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168 # Be more error friendly |
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169 toktype = Generic.Error |
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170 val = match.group() |
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171 _logger.warning("Unhandled explicit token type: %s", val) |
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172 else: |
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173 val = match.group("character") |
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174 yield match.start(), toktype, val |
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175 if ctx: |
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176 ctx.pos = match.end() |
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177 |
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178 tokens = { |
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179 "root": [ |
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180 (r"\n", Whitespace), |
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181 (r"/\*", Comment.Multiline, "multiline-nested-comment"), |
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182 (r"//.*$", Comment.Single), |
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183 include("remark"), |
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184 (r"(?i)\\(block|state(?:ment)?)[ \t]*(\{)", |
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185 bygroups(op_symbol(Text), LexBase.op_fixed(Whitespace, " ")), |
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186 "block-expr"), |
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187 (r"(?i)\\(" |
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188 r"(?:textstate(?:ment)?)" |
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189 r"|(?:tstate(?:ment)?)" |
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190 r"|(?:textblock)" |
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191 r"|(?:tblock)" |
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192 r")[ \t]*(\{)", |
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193 bygroups(op_symbol(Text), LexBase.op_fixed(Whitespace, " ")), |
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194 "text-statement"), |
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195 (r"\\\n", Text), |
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196 (r"(?i)\\(" |
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197 r"(?:prog(?:ram)?)" |
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198 r"|(?:algo(?:rithm)?)" |
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199 r"|(?:proc(?:edure)?)" |
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200 r"|(?:func(?:tion)?|(?:fn))" |
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201 r"|(?:class)" |
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202 r")[ \t]*(\{)", |
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203 bygroups(op_translate(Keyword), |
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204 LexBase.op_fixed(Whitespace, " ")), |
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205 "entity-name"), |
| 94 | 206 # ENDxxx keywords with optional entity name in two parts: |
| 207 # 1. with name | |
| 208 (r"(?i)\\end(?:[_\-]|(?:[ \t]+))?(" | |
| 57 | 209 r"(?:prog(?:ram)?)" |
| 210 r"|(?:algo(?:rithm)?)" | |
| 211 r"|(?:proc(?:edure)?)" | |
| 212 r"|(?:func(?:tion)?)" | |
| 213 r"|(?:class)" | |
| 94 | 214 r")(?:[_\-]|(?:[\t ]+))?(\{)", |
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215 bygroups(op_opt_end_translate(Keyword), |
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216 op_opt_ignore_or_fixed(Whitespace, " ")), |
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217 "entity-name-end"), |
| 94 | 218 # 2. without name |
| 219 # 3. AND keywords that do not allow a param (e.g. endif) | |
| 220 (r"(?i)\\end(?:[_\-]|(?:[ \t]+))?(" | |
| 57 | 221 r"(?:prog(?:ram)?)" |
| 222 r"|(?:algo(?:rithm)?)" | |
| 223 r"|(?:proc(?:edure)?)" | |
| 224 r"|(?:func(?:tion)?)" | |
| 225 r"|(?:class)" | |
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226 r")\b", |
| 57 | 227 bygroups(op_opt_end_translate(Keyword))), |
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228 # Keywords |
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229 (r"(?i)\\(" |
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230 r"(?:is)" |
| 82 | 231 r"|(?:with)" |
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232 r")\b", |
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233 bygroups(op_translate(Keyword))), |
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234 include("expr"), |
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235 (r"[^\S\n]+", Text), |
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236 ], |
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237 "remark": [ |
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238 (r"(?i)\\(remark|rem)\b(.*)$", |
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239 bygroups(op_symbol(Comment.Single), Comment.Single)), |
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240 ], |
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241 "entity-name": [ # may be multiline |
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242 (r"[^\\}]+", Name.Entity), |
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243 (r"\}", LexBase.op_ignore, "#pop"), |
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244 (r"\\\}", LexBase.op_fixed(Name.Entity, "}")), |
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76
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245 (r"\\\\", LexBase.op_fixed(Name.Entity, "\\")), |
|
74
c1357674622d
Remove an escaping backslash where appropriate
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246 (r"\\", LexBase.op_fixed(Name.Entity, "\\")), |
|
62
7153e945a3d6
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61
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247 ], |
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248 "entity-name-end": [ # may be multiline -- suppressed if no_end |
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249 (r"[^\\}]+", op_opt_ignore(Name.Entity)), |
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250 (r"\}", LexBase.op_ignore, "#pop"), |
|
74
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251 (r"\\\}", op_opt_ignore_or_fixed(Name.Entity, "}")), |
|
76
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252 (r"\\\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
|
74
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253 (r"\\", op_opt_ignore_or_fixed(Name.Entity, "\\")), |
|
40
df08226a6984
Names for some entities (program, algorithm, function, procedure, class).
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39
diff
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254 ], |
|
34
1f741934205e
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255 "expr": [ |
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256 include("punctuation"), |
|
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257 include("py-strings"), |
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258 include("py-numbers"), |
|
90
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259 (r"(?i)\\text[ \t]*\{", LexBase.op_ignore, "text-in-expr"), |
|
84
3ac1c4502ad0
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260 include("explicit-tokentype"), |
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75
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261 include("remark"), |
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81
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262 include("keyword-constants"), |
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93
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263 include("word-operators"), |
|
75
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264 include("math-builtins"), |
|
52
5bfa9113d3c4
First tests with "py-name": names from the Python lexer
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41
diff
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265 include("py-name"), |
|
70
5517b0be67f0
Basic "\TEXT" escape for expressions
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266 ], |
|
80
f487f0d322a5
Move "expr-in-braces" up to "expr".
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267 "expr-in-braces": [ |
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268 include("punctuation-in-braces"), |
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269 include("py-strings"), |
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270 include("py-numbers"), |
|
90
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271 (r"(?i)\\text[ \t]*\{", LexBase.op_ignore, "text-in-expr"), |
|
84
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272 include("explicit-tokentype"), |
|
80
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273 include("remark"), |
|
81
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274 include("keyword-constants"), |
|
93
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275 include("word-operators"), |
|
80
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276 include("math-builtins"), |
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277 include("py-name"), |
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278 ], |
|
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279 "block-expr": [ # somewhat similar to "root" |
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280 (r"\}", LexBase.op_ignore, "#pop"), |
|
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281 (r"\n", Whitespace), |
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282 include("expr-in-braces"), |
|
76
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283 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
|
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284 (r"\\", LexBase.op_fixed(Text, "\\")), |
|
91
feb41c8d72d2
Instead of "\s+" use "[^\S\n]+" because a \n is not wanted really in this match.
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285 (r"[^\S\n]+", Text), |
|
75
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286 ], |
|
78
abb2e8c65d0f
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287 "text-statement": [ # like block but default to text-mode |
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288 (r"[^\\}\n]+", Text), |
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Implement "TEXTSTATEMENT"
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289 (r"\}", LexBase.op_ignore, "#pop"), |
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290 (r"\n", Whitespace), |
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Implement "TEXTSTATEMENT"
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291 (r"\\\}", LexBase.op_fixed(Text, "}")), |
|
90
2af4684c8e78
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292 (r"(?i)\\expr(?:ession)?[ \t]*\{", |
|
78
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Implement "TEXTSTATEMENT"
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293 LexBase.op_ignore, |
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294 "block-expr"), |
|
84
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295 include("explicit-tokentype"), |
|
78
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296 include("remark"), |
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Implement "TEXTSTATEMENT"
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297 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
|
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Implement "TEXTSTATEMENT"
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298 (r"\\", LexBase.op_fixed(Text, "\\")), |
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Implement "TEXTSTATEMENT"
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299 ], |
|
75
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300 "text-in-expr": [ |
|
77
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301 (r"[^\\}\n]+", Text), |
|
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302 (r"\}", LexBase.op_ignore, "#pop"), |
|
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diff
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303 (r"\n", Whitespace), |
|
72
206017a08ed7
Refactor: Make the "op_space()" and related methods more flexible and allow a given fixed token type and value
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70
diff
changeset
|
304 (r"\\\}", LexBase.op_fixed(Text, "}")), |
|
92
3f37832c405d
FIX: Wrong state for \TEXT command
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91
diff
changeset
|
305 (r"(?i)\\expr(?:ession)?[ \t]*\{", |
|
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FIX: Wrong state for \TEXT command
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diff
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306 LexBase.op_ignore, |
|
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FIX: Wrong state for \TEXT command
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diff
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307 "block-expr"), |
|
84
3ac1c4502ad0
Implement "\tt-XXX" and "ttx-XXX" for explicit token types.
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|
308 include("explicit-tokentype"), |
|
78
abb2e8c65d0f
Implement "TEXTSTATEMENT"
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diff
changeset
|
309 (r"\\\\", LexBase.op_fixed(Text, "\\")), |
|
72
206017a08ed7
Refactor: Make the "op_space()" and related methods more flexible and allow a given fixed token type and value
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70
diff
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|
310 (r"\\", LexBase.op_fixed(Text, "\\")), |
|
70
5517b0be67f0
Basic "\TEXT" escape for expressions
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diff
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311 ], |
|
75
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312 "math-builtins": [ |
|
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313 (words(("sqrt", "pow", "cos", "sin", "tan", "arcos", "arcsin", |
|
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New implementation of "STATEMENT" (also aliased to "STATE" and "BLOCK").
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314 "arctan", "arctan2", "mod", "exp", "ln", "log"), |
|
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315 prefix=r"(?<!\.)", |
|
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changeset
|
316 suffix=r"\b"), |
|
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|
317 Name.Builtin), |
|
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|
318 ], |
|
93
84c0f761c836
Renamed "text-operators" to "word-operators" and allow more case-variants
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|
319 "word-operators": [ |
|
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320 (words(("IN", "In", "in", |
|
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321 "IS", "Is", "is", |
|
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322 "AND", "And", "and", |
|
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323 "OR", "Or", "or", |
|
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diff
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324 "XOR", "Xor", "xor", |
|
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diff
changeset
|
325 "NOT", "Not", "not"), |
|
75
711f8d19e27a
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|
326 prefix=r"(?<!\.)", |
|
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changeset
|
327 suffix=r"\b"), |
|
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|
328 Operator.Word), |
|
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329 ], |
|
81
6d8b813fb296
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330 "keyword-constants": [ |
|
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331 (words(("True", "TRUE", "true", "False", "FALSE", "false", |
|
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332 "None", "NONE", "non", "Nil", "NIL", "nil", |
|
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333 "Null", "NULL", "null", |
|
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334 "Empty", "EMPTY", "empty"), |
|
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335 prefix=r"(?<!\.)", |
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336 suffix=r"\b"), |
|
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337 Keyword.Constant), |
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338 ], |
|
75
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339 "punctuation": [ |
|
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340 (r"[{}:(),;[\]]", Punctuation), |
|
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341 ], |
|
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342 "punctuation-in-braces": [ |
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343 # like "punctuation" but needs an escaped curly brace for } |
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344 (r"\\\}", LexBase.op_fixed(Punctuation, "}")), |
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345 (r"[{:(),;[\]]", Punctuation), |
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346 ], |
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347 "explicit-tokentype": [ |
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348 # All these REs are CASE-SENSITIVE! |
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349 |
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350 # Multiple characters possible, but no escaping! |
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351 (r"\\ttx\-(?P<type>[a-zA-Z0-9_-]+?)(?P<sep>[/:|=*+!\$~])" |
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352 r"(?P<character>(.|\n)+?)(?P=sep)", |
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353 op_explicit_tokentype), |
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354 (r"\\ttx\-(?P<type>[a-zA-Z0-9_-]+?)\{(?P<character>[^}]+?)\}", |
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355 op_explicit_tokentype), |
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356 (r"\\ttx\-(?P<type>[a-zA-Z0-9_-]+?)\((?P<character>[^)]+?)\)", |
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357 op_explicit_tokentype), |
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358 (r"\\ttx\-(?P<type>[a-zA-Z0-9_-]+?)<(?P<character>[^>]+?)>", |
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359 op_explicit_tokentype), |
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360 (r"\\ttx\-(?P<type>[a-zA-Z0-9_-]+?)\[(?P<character>[^\]]+?)\]", |
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361 op_explicit_tokentype), |
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362 |
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363 # Every character is possible: no escaping needed! |
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364 (r"\\tt-(?P<type>[^/]+?)/(?P<character>(?:.|\n))", |
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365 op_explicit_tokentype), |
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366 ], |
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367 } |
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368 |
| 57 | 369 def __init__(self, **options): |
| 370 val = pygments.util.get_bool_opt(options, "no_end", default=False) | |
| 371 self.no_end = val | |
| 372 LexBase.__init__(self, **options) | |
| 373 | |
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374 |
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375 class AlgPseudocodeLexer_DE(AlgPseudocodeLexer): |
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376 |
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377 name = "AlgPseudocodeDE" |
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378 aliases = ["algpseudocode-de", "algpseudo-de"] |
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379 filenames = ["*.algpseudo-de", "*.algpseudocode-de"] |
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380 |
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381 LANG = "de" |
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382 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy() |
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383 TRANSLATIONS.update({ |
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384 "PROG": "PROGRAMM", |
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385 "PROGRAM": "PROGRAMM", |
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386 "ALGO": "ALGORITHMUS", |
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387 "ALGORITHM": "ALGORITHMUS", |
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388 "PROC": "PROZEDUR", |
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389 "PROCEDURE": "PROZEDUR", |
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390 "FUNC": "FUNKTION", |
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391 "FUNCTION": "FUNKTION", |
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392 "FN": "FUNKTION", |
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393 "CLASS": "KLASSE", |
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394 "IS": "IST", |
| 82 | 395 "WITH": "MIT", |
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396 }) |
| 57 | 397 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 398 END_TRANSLATIONS.update({ | |
| 399 "PROG": "ENDE DES PROGRAMMS", | |
| 400 "PROGRAM": "ENDE VON PROGRAMMS", | |
| 401 "ALGO": "ENDE DES ALGORITHMUS", | |
| 402 "ALGORITHM": "ENDE DES ALGORITHMUS", | |
| 403 "PROC": "ENDE DER PROZEDUR", | |
| 404 "PROCEDURE": "ENDE DER PROZEDUR", | |
| 405 "FUNC": "ENDE DER FUNKTION", | |
| 406 "FUNCTION": "ENDE DER FUNKTION", | |
| 407 "FN": "ENDE DER FUNKTION", | |
| 408 "CLASS": "ENDE DER KLASSE", | |
| 409 }) | |
| 410 DEFAULT_END_PREFIX = "ENDE VON " | |
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411 |
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412 |
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413 class AlgPseudocodeLexer_FR(AlgPseudocodeLexer): |
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414 |
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415 name = "AlgPseudocodeFR" |
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416 aliases = ["algpseudocode-fr", "algpseudo-fr"] |
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417 filenames = ["*.algpseudo-fr", "*.algpseudocode-fr"] |
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418 |
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419 LANG = "de" |
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420 TRANSLATIONS = AlgPseudocodeLexer.TRANSLATIONS.copy() |
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421 TRANSLATIONS.update({ |
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422 "PROG": "PROGRAMME", |
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423 "PROGRAM": "PROGRAMME", |
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424 "ALGO": "ALGORITHME", |
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425 "ALGORITHM": "ALGORITHME", |
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426 "PROC": "PROCÉDURE", |
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427 "PROCEDURE": "PROCÉDURE", |
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428 "FUNC": "FONCTION", |
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429 "FUNCTION": "FOUNCTION", |
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430 "FN": "FONCTION", |
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431 "CLASS": "CLASSE", |
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432 "IS": "EST", |
| 82 | 433 "WITH": "AVEC", |
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434 }) |
| 57 | 435 END_TRANSLATIONS = AlgPseudocodeLexer.END_TRANSLATIONS.copy() |
| 436 END_TRANSLATIONS.update({ | |
| 437 "PROG": "FIN DE PROGRAMME", | |
| 438 "PROGRAM": "FIN DE PROGRAMME", | |
| 439 "ALGO": "FIN D'ALGORITHME", | |
| 440 "ALGORITHM": "FIN D'ALGORITHME", | |
| 441 "PROC": "FIN DE PROCÉDURE", | |
| 442 "PROCEDURE": "FIN DE PROCÉDURE", | |
| 443 "FUNC": "FIN DE FONCTION", | |
| 444 "FUNCTION": "FIN DE FOUNCTION", | |
| 445 "FN": "FIN DE FONCTION", | |
| 446 "CLASS": "FIN DE CLASSE", | |
| 447 }) | |
| 448 DEFAULT_END_PREFIX = "FIN DE " |