Function extern_spec_SubAssign_i128_i128_sub_assign 

pub fn extern_spec_SubAssign_i128_i128_sub_assign(self_: &mut i128, rhs: i128)

extern spec for i128::sub_assign

This is not a real function: its only use is for documentation.

requires

$type::MIN@ <= self@ $op rhs@ && self@ $op rhs@ <= $type::MAX@

ensures

(^self)@ == self@ $op rhs@