program method
Parser
program()
Implementation
Parser program() => seq6(
ref1(token, 'program'),
ref0(identifier),
seq3(
ref1(token, '('),
ref0(identifier).plusSeparated(ref1(token, ',')),
ref1(token, ')'),
).optional(),
ref1(token, ';'),
ref0(block),
ref1(token, '.'),
);