Enum MetaAction 

pub enum MetaAction {
    Store {
        dst: u32,
    },
    Discard,
    Compare {
        k: bool,
        negate: bool,
    },
    Concat {
        dst: u32,
        base_a: u32,
    },
}

Per-op finishing action for a yielded metamethod call.

Variants

Store

arithmetic / index / unary / length: store the single result at dst

Fields

dst: u32

Destination register receiving the metamethod’s first result.

Discard

__newindex: the metamethod has no result to keep

Compare

comparison (__eq/__lt/__le): the truthiness of the result feeds the conditional skip — the following JMP runs iff result.truthy() == k. negate=true flips the truthiness first, for the ≤5.3 __le → not __lt(b, a) synthesis path where the metamethod is __lt but the operator was <=.

Fields

k: bool

Sense of the conditional skip the comparison op was emitted for.

negate: bool

True when the 5.3 __le → not __lt(b,a) synthesis is in effect.

Concat

__concat: store the result at dst, set top = dst + 1, then continue folding the operands still at [base_a .. top) (PUC finishOp re-runs).

Fields

dst: u32

Destination register for the metamethod’s result.

base_a: u32

First operand register of the original concat span.

Trait Implementations

impl Clone for MetaAction

fn clone(&self) -> MetaAction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for MetaAction