pointerAddrSpace

pub fn pointerAddrSpace(self: Type, builder: *const Builder) AddrSpace {
    switch (self) {
        .ptr => return .default,
        else => {
            const item = builder.type_items.items[@intFromEnum(self)];
            assert(item.tag == .pointer);
            return @enumFromInt(item.data);
        },
    }
}