[type] Parser [grammar] grammar T; a : LETTERS* 'd' {} ; // Note the double-backslash to avoid Java passing // unescaped values as part of the grammar. LETTERS : ('a'|'\\u{1F600}'..'\\u{1F943}'); [start] a [input] a🗿🥄d [output] """ad """ [errors] line 1:1 token recognition error at: '🗿' line 1:2 token recognition error at: '🥄'