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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

icon.lua (2255B)

    

  1. -- Copyright 2006-2024 Mitchell. See LICENSE.
  2. -- LPeg lexer for the Icon programming language.
  3. -- http://www.cs.arizona.edu/icon
  4. -- Contributed by Carl Sturtivant.
  6. local lexer = require('lexer')
  7. local token, word_match = lexer.token, lexer.word_match
  8. local P, S = lpeg.P, lpeg.S
  10. local lex = lexer.new('icon')
  12. -- Whitespace.
  13. lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
  15. -- Keywords.
  16. lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
  17.   'break', 'by', 'case', 'create', 'default', 'do', 'else', 'end', 'every', 'fail', 'global', 'if',
  18.   'initial', 'invocable', 'link', 'local', 'next', 'not', 'of', 'procedure', 'record', 'repeat',
  19.   'return', 'static', 'suspend', 'then', 'to', 'until', 'while'
  20. }))
  22. -- Icon Keywords: unique to Icon.
  23. lex:add_rule('special_keyword', token('special_keyword', '&' * word_match{
  24.   'allocated', 'ascii', 'clock', 'collections', 'cset', 'current', 'date', 'dateline', 'digits',
  25.   'dump', 'e', 'error', 'errornumber', 'errortext', 'errorvalue', 'errout', 'fail', 'features',
  26.   'file', 'host', 'input', 'lcase', 'letters', 'level', 'line', 'main', 'null', 'output', 'phi',
  27.   'pi', 'pos', 'progname', 'random', 'regions', 'source', 'storage', 'subject', 'time', 'trace',
  28.   'ucase', 'version'
  29. }))
  30. lex:add_style('special_keyword', lexer.styles.type)
  32. -- Identifiers.
  33. lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
  35. -- Strings.
  36. local sq_str = lexer.range("'")
  37. local dq_str = lexer.range('"')
  38. lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
  40. -- Comments.
  41. lex:add_rule('comment', token(lexer.COMMENT, lexer.to_eol('#', true)))
  43. -- Numbers.
  44. local radix_literal = P('-')^-1 * lexer.dec_num * S('rR') * lexer.alnum^1
  45. lex:add_rule('number', token(lexer.NUMBER, radix_literal + lexer.number))
  47. -- Preprocessor.
  48. lex:add_rule('preproc', token(lexer.PREPROCESSOR, '$' *
  49.   word_match('define else endif error ifdef ifndef include line undef')))
  51. -- Operators.
  52. lex:add_rule('operator', token(lexer.OPERATOR, S('+-/*%<>~!=^&|?~@:;,.()[]{}')))
  54. -- Fold points.
  55. lex:add_fold_point(lexer.PREPROCESSOR, 'ifdef', 'endif')
  56. lex:add_fold_point(lexer.PREPROCESSOR, 'ifndef', 'endif')
  57. lex:add_fold_point(lexer.KEYWORD, 'procedure', 'end')
  59. lexer.property['scintillua.comment'] = '#'
  61. return lex