Function extern_spec_AddAssign_u128_u128_add_assign 

pub fn extern_spec_AddAssign_u128_u128_add_assign(self_: &mut u128, rhs: u128)

extern spec for u128::add_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@