decorator method
Implementation
Parser<ExpressionNode> decorator() => seq3(
ref1(token, '@'),
ref0(singleExpression),
ref0(newlineToken),
).map3((_, expr, _) => expr);
Parser<ExpressionNode> decorator() => seq3(
ref1(token, '@'),
ref0(singleExpression),
ref0(newlineToken),
).map3((_, expr, _) => expr);