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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

pony.lua (3917B)

    

  1. -- Copyright 2017-2024 Murray Calavera. See LICENSE.
  2. -- Pony 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('pony')
  10. -- Whitespace.
  11. local ws = token(lexer.WHITESPACE, lexer.space^1)
  12. lex:add_rule('whitespace', ws)
  14. -- Capabilities.
  15. local capability = token(lexer.LABEL, word_match('box iso ref tag trn val'))
  16. lex:add_rule('capability', capability)
  18. -- Annotations.
  19. local annotation = token(lexer.PREPROCESSOR, lexer.range('\\', false, false))
  20. lex:add_rule('annotation', annotation)
  22. -- Functions.
  23. -- Highlight functions with syntax sugar at declaration.
  24. lex:add_rule('function',
  25.   token(lexer.KEYWORD, word_match('fun new be')) * ws^-1 * annotation^-1 * ws^-1 * capability^-1 *
  26.     ws^-1 * token(lexer.FUNCTION, word_match{
  27.     'create', 'dispose', '_final', 'apply', 'update', 'add', 'sub', 'mul', 'div', 'mod',
  28.     'add_unsafe', 'sub_unsafe', 'mul_unsafe', 'div_unsafe', 'mod_unsafe', 'shl', 'shr',
  29.     'shl_unsafe', 'shr_unsafe', 'op_and', 'op_or', 'op_xor', 'eq', 'ne', 'lt', 'le', 'ge', 'gt',
  30.     'eq_unsafe', 'ne_unsafe', 'lt_unsafe', 'le_unsafe', 'ge_unsafe', 'gt_unsafe', 'neg',
  31.     'neg_unsafe', 'op_not', --
  32.     'has_next', 'next', --
  33.     '_serialise_space', '_serialise', '_deserialise'
  34.   }))
  36. -- Keywords.
  37. lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
  38.   'actor', 'as', 'be', 'break', 'class', 'compile_error', 'compile_intrinsic', 'continue',
  39.   'consume', 'do', 'else', 'elseif', 'embed', 'end', 'error', 'for', 'fun', 'if', 'ifdef', 'iftype',
  40.   'in', 'interface', 'is', 'isnt', 'lambda', 'let', 'match', 'new', 'object', 'primitive',
  41.   'recover', 'repeat', 'return', 'struct', 'then', 'this', 'trait', 'try', 'type', 'until', 'use',
  42.   'var', 'where', 'while', 'with'
  43. }))
  45. -- Constants.
  46. lex:add_rule('constant', token(lexer.CONSTANT, word_match('true false')))
  48. -- Operators.
  49. local ops = {
  50.   ['+'] = true, ['-'] = true, ['*'] = true, ['/'] = true, ['%'] = true, ['+~'] = true,
  51.   ['-~'] = true, ['*~'] = true, ['/~'] = true, ['%~'] = true, ['<<'] = true, ['>>'] = true,
  52.   ['<<~'] = true, ['>>~'] = true, ['=='] = true, ['!='] = true, ['<'] = true, ['<='] = true,
  53.   ['>='] = true, ['>'] = true, ['==~'] = true, ['!=~'] = true, ['<~'] = true, ['<=~'] = true,
  54.   ['>=~'] = true, ['>~'] = true
  55. }
  56. lex:add_rule('operator', token(lexer.OPERATOR, word_match('and or xor not addressof digestof') +
  57.   lpeg.Cmt(S('+-*/%<>=!~')^1, function(input, index, op) return ops[op] and index or nil end)))
  59. -- Identifiers.
  60. local id_suffix = (lexer.alnum + "'" + '_')^0
  61. lex:add_rule('type', token(lexer.TYPE, P('_')^-1 * lexer.upper * id_suffix))
  62. lex:add_rule('identifier', token(lexer.IDENTIFIER, P('_')^-1 * lexer.lower * id_suffix))
  63. lex:add_rule('lookup', token(lexer.IDENTIFIER, '_' * lexer.digit^1))
  65. -- Strings.
  66. local sq_str = lexer.range("'")
  67. local dq_str = lexer.range('"')
  68. local tq_str = lexer.range('"""')
  69. lex:add_rule('string', token(lexer.STRING, sq_str + tq_str + dq_str))
  71. -- Numbers.
  72. local function num(digit) return digit * (digit^0 * '_')^0 * digit^1 + digit end
  73. local int = num(lexer.digit)
  74. local frac = '.' * int
  75. local exp = S('eE') * (P('-') + '+')^-1 * int
  76. local hex = '0x' * num(lexer.xdigit)
  77. local bin = '0b' * num(S('01'))
  78. local float = int * frac^-1 * exp^-1
  79. lex:add_rule('number', token(lexer.NUMBER, hex + bin + float))
  81. -- Comments.
  82. local line_comment = lexer.to_eol('//')
  83. local block_comment = lexer.range('/*', '*/', false, false, true)
  84. lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment))
  86. -- Punctuation.
  87. -- There is no suitable token name for this, change this if ever one is added.
  88. lex:add_rule('punctuation',
  89.   token(lexer.OPERATOR, P('=>') + '.>' + '<:' + '->' + S('=.,:;()[]{}!?~^&|_@')))
  91. -- Qualifiers.
  92. lex:add_rule('qualifier', token(lexer.LABEL, '#' * word_match('read send share any alias')))
  94. lexer.property['scintillua.comment'] = '//'
  96. return lex