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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

apl.lua (1539B)

    

  1. -- Copyright 2015-2024 David B. Lamkins <david@lamkins.net>. See LICENSE.
  2. -- APL LPeg lexer.
  4. local lexer = require('lexer')
  5. local token, word_match = lexer.token, lexer.word_match
  6. local P, S = lpeg.P, lpeg.S
  8. local lex = lexer.new('apl')
  10. -- Whitespace.
  11. lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
  13. -- Comments.
  14. lex:add_rule('comment', token(lexer.COMMENT, lexer.to_eol(P('⍝') + '#')))
  16. -- Strings.
  17. local sq_str = lexer.range("'", false, false)
  18. local dq_str = lexer.range('"')
  19. lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
  21. -- Numbers.
  22. local dig = lexer.digit
  23. local rad = P('.')
  24. local exp = S('eE')
  25. local img = S('jJ')
  26. local sgn = P('¯')^-1
  27. local float = sgn * (dig^0 * rad * dig^1 + dig^1 * rad * dig^0 + dig^1) * (exp * sgn * dig^1)^-1
  28. lex:add_rule('number', token(lexer.NUMBER, float * img * float + float))
  30. -- Keywords.
  31. lex:add_rule('keyword', token(lexer.KEYWORD,
  32.   P('⍞') + 'χ' + '⍺' + '⍶' + '⍵' + '⍹' + '⎕' * lexer.alpha^0))
  34. -- Names.
  35. local n1l = lexer.alpha
  36. local n1b = P('_') + '∆' + '⍙'
  37. local n2l = n1l + lexer.digit
  38. local n2b = n1b + '¯'
  39. local n1 = n1l + n1b
  40. local n2 = n2l + n2b
  41. local name = n1 * n2^0
  43. -- Labels.
  44. lex:add_rule('label', token(lexer.LABEL, name * ':'))
  46. -- Variables.
  47. lex:add_rule('variable', token(lexer.VARIABLE, name))
  49. -- Special.
  50. lex:add_rule('special', token(lexer.TYPE, S('{}[]();') + '←' + '→' + '◊'))
  52. -- Nabla.
  53. lex:add_rule('nabla', token(lexer.PREPROCESSOR, P('∇') + '⍫'))
  55. lexer.property['scintillua.comment'] = '#'
  57. return lex