Function jit_pattern_check_constructor 

pub extern "C" fn jit_pattern_check_constructor(
    obj_bits: u64,
    mode: u64,
) -> u64

Check if object matches Ok/Err constructor pattern mode: 0 = Ok (check “Ok” or “value” key), 1 = Err (check “Err” or “error” key) Returns TAG_BOOL_TRUE if matches, TAG_BOOL_FALSE otherwise