i proposed this before 1.0 was finalised. i am act...

# announcements

[mikehearn]

i proposed this before 1.0 was finalised. i am actually not sure it imposes such a huge performance cost, especially if the compiler understands it and can optimise out the checks. on x86 at least it compiles to an always-correctly-predicted jo opcode and isn't very expensive iirc.