oasis-root

gap.lua (1344B)

-- Copyright 2006-2024 Mitchell. See LICENSE.
-- Gap LPeg lexer.
local lexer = require('lexer')
local token, word_match = lexer.token, lexer.word_match
local P, S = lpeg.P, lpeg.S
local lex = lexer.new('gap')
-- Whitespace.
lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
-- Keywords.
lex:add_rule('keyword', token(lexer.KEYWORD, word_match{
  'and', 'break', 'continue', 'do', 'elif', 'else', 'end', 'fail', 'false', 'fi', 'for', 'function',
  'if', 'in', 'infinity', 'local', 'not', 'od', 'or', 'rec', 'repeat', 'return', 'then', 'true',
  'until', 'while'
}))
-- Identifiers.
lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word))
-- Strings.
local sq_str = lexer.range("'", true)
local dq_str = lexer.range('"', true)
lex:add_rule('string', token(lexer.STRING, sq_str + dq_str))
-- Comments.
lex:add_rule('comment', token(lexer.COMMENT, lexer.to_eol('#')))
-- Numbers.
lex:add_rule('number', token(lexer.NUMBER, lexer.dec_num * -lexer.alpha))
-- Operators.
lex:add_rule('operator', token(lexer.OPERATOR, S('*+-,./:;<=>~^#()[]{}')))
-- Fold points.
lex:add_fold_point(lexer.KEYWORD, 'function', 'end')
lex:add_fold_point(lexer.KEYWORD, 'do', 'od')
lex:add_fold_point(lexer.KEYWORD, 'if', 'fi')
lex:add_fold_point(lexer.KEYWORD, 'repeat', 'until')
lexer.property['scintillua.comment'] = '#'
return lex