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-- Copyright 2021-2022 Mitchell. See LICENSE.
-- TypeScript 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('typescript', {inherit = lexer.load('javascript')})
-- Whitespace
lex:modify_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
-- Keywords.
lex:modify_rule('keyword', token(lexer.KEYWORD, word_match[[
abstract as constructor declare is module namespace require type
]]) + lex:get_rule('keyword'))
-- Types.
lex:modify_rule('type', token(lexer.TYPE, word_match[[
boolean number bigint string unknown any void never symbol object
]]) + lex:get_rule('type'))
return lex
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