Function extern_spec_ShlAssign__ref_u16_i128_shl_assign 

pub fn extern_spec_ShlAssign__ref_u16_i128_shl_assign(
    self_: &mut i128,
    rhs: &u16,
)

extern spec for i128::shl_assign

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

requires

(0usize as $rhs) <= *rhs && *rhs < $type::BITS as $rhs

ensures

^self == *self $op rhs