UplcConstrListReprRules

Repr rules for UplcConstr list intrinsics (IntrinsicsUplcConstrList).

Lists with SumUplcConstr representation use Constr(0, [h, t]) / Constr(1, []) instead of builtin lists. Operations use Case-based pattern matching. No repr rules for contains — the intrinsic body handles representation conversion internally via toDefaultTypeVarRepr.