Function extern_spec_AddAssign__ref_i128_i128_add_assign 

pub fn extern_spec_AddAssign__ref_i128_i128_add_assign(
    self_: &mut i128,
    rhs: &i128,
)

extern spec for i128::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@