zerodrop 0.1.4

Zero boxed data when dropped. Nolonger maintained. Use ClearOnDrop at https://github.com/cesarb/clear_on_drop/ instead.
Documentation 
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/*
#[derive(Debug)]
pub struct DropSecret<T>(Box(T)) where T: Drop;

impl<T> Drop for DropSecret<T> where T: Drop {
    #[inline(never)]
    fn drop(&mut self) {
        unsafe { ::std::intrinsics::drop_in_place(self); }
        unsafe { ::std::intrinsics::volatile_set_memory::<Secret<T>>(&t, 0, 1); }
    }
}

#[feature(box_syntax)]
impl<T> DropSecret<T> where T: Drop+Default {
    pub fn new(t: &T) -> DropSecret<T> {
        box *t
    }
}
*/