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oasis-root

Compiled tree of Oasis Linux based on own branch at <https://hacktivis.me/git/oasis/> git clone https://anongit.hacktivis.me/git/oasis-root.git

eiffel.lua (2204B)


  1. -- Copyright 2006-2024 Mitchell. See LICENSE.
  2. -- Eiffel LPeg lexer.
  3. local lexer = require('lexer')
  4. local token, word_match = lexer.token, lexer.word_match
  5. local P, S = lpeg.P, lpeg.S
  6. local lex = lexer.new('eiffel')
  7. -- Whitespace.
  8. lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
  9. -- Keywords.
  10. lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
  11. 'alias', 'all', 'and', 'as', 'check', 'class', 'creation', 'debug', 'deferred', 'do', 'else',
  12. 'elseif', 'end', 'ensure', 'expanded', 'export', 'external', 'feature', 'from', 'frozen', 'if',
  13. 'implies', 'indexing', 'infix', 'inherit', 'inspect', 'invariant', 'is', 'like', 'local', 'loop',
  14. 'not', 'obsolete', 'old', 'once', 'or', 'prefix', 'redefine', 'rename', 'require', 'rescue',
  15. 'retry', 'select', 'separate', 'then', 'undefine', 'until', 'variant', 'when', 'xor', --
  16. 'current', 'false', 'precursor', 'result', 'strip', 'true', 'unique', 'void'
  17. }))
  18. -- Types.
  19. lex:add_rule('type',
  20. token(lexer.TYPE, word_match('character string bit boolean integer real none any')))
  21. -- Identifiers.
  22. lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
  23. -- Strings.
  24. local sq_str = lexer.range("'", true)
  25. local dq_str = lexer.range('"', true)
  26. lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
  27. -- Comments.
  28. lex:add_rule('comment', token(lexer.COMMENT, lexer.to_eol('--')))
  29. -- Numbers.
  30. lex:add_rule('number', token(lexer.NUMBER, lexer.number))
  31. -- Operators.
  32. lex:add_rule('operator', token(lexer.OPERATOR, S('=!<>+-/*%&|^~.,:;?()[]{}')))
  33. -- Fold points.
  34. lex:add_fold_point(lexer.KEYWORD, 'check', 'end')
  35. lex:add_fold_point(lexer.KEYWORD, 'debug', 'end')
  36. lex:add_fold_point(lexer.KEYWORD, 'deferred',
  37. function(text, pos, line, s) return line:find('deferred%s+class') and 0 or 1 end)
  38. lex:add_fold_point(lexer.KEYWORD, 'do', 'end')
  39. lex:add_fold_point(lexer.KEYWORD, 'from', 'end')
  40. lex:add_fold_point(lexer.KEYWORD, 'if', 'end')
  41. lex:add_fold_point(lexer.KEYWORD, 'inspect', 'end')
  42. lex:add_fold_point(lexer.KEYWORD, 'once', 'end')
  43. lex:add_fold_point(lexer.KEYWORD, 'class',
  44. function(text, pos, line, s) return line:find('deferred%s+class') and 0 or 1 end)
  45. lexer.property['scintillua.comment'] = '--'
  46. return lex