Bits

        pub const Bits = packed struct(u32) {
            /// If true, one or more prongs have multiple items.
            has_multi_cases: bool,
            /// If true, one or more prongs have ranges.
            /// Only valid if `has_multi_cases` is also set.
            any_ranges: bool,
            has_else: bool,
            has_under: bool,
            /// If true, at least one prong contains a `continue`.
            /// Only valid if `has_label` is set.
            has_continue: bool,
            // If true, at least one prong has a non-inline payload/tag capture.
            any_maybe_runtime_capture: bool,
            payload_capture_inst_is_placeholder: bool,
            tag_capture_inst_is_placeholder: bool,
            scalar_cases_len: ScalarCasesLen,

            // NOTE maybe don't steal any more bits from poor `scalar_cases_len`
            // and split `Bits` into two parts instead, `raw_operand` surely
            // wouldn't mind donating a couple of bits for that purpose...
            pub const ScalarCasesLen = u24;
        }