Function extern_spec_SubAssign_usize_usize_sub_assign 

pub fn extern_spec_SubAssign_usize_usize_sub_assign(
    self_: &mut usize,
    rhs: usize,
)

extern spec for usize::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@