Function extern_spec_BitXorAssign_usize_bitxor_assign 

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

extern spec for usize::bitxor_assign

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

ghost

ensures

^self == *self $op rhs