pub fn never_u32<'src>() -> impl Parser<'src, &'src str, u32, Err<Simple<'src, char>>>Expand description
A parser that always fails. Used for variant operands whose real form is a
symbolic @label (Branch, ConditionalBranch, Call). Letting these
fall through here means Instruction::parser() errors on their mnemonics,
which is correct — the orchestrator must intercept first.