Function extern_spec_ShlAssign_isize_isize_shl_assign 

pub fn extern_spec_ShlAssign_isize_isize_shl_assign(
    self_: &mut isize,
    rhs: isize,
)

extern spec for isize::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