valueToken method
Implementation
Parser<String> valueToken() => ref2(
token,
seq2(pattern('a-z'), pattern('A-Za-z0-9_').starString()),
'Value expected',
);
Parser<String> valueToken() => ref2(
token,
seq2(pattern('a-z'), pattern('A-Za-z0-9_').starString()),
'Value expected',
);