Method truncate

crates/common/src/boxvec.rs:172–180

(&mut self, new_len: usize)

    }

    pub fn truncate(&mut self, new_len: usize) {
        unsafe {
            if new_len < self.len() {
                let tail: *mut [_] = &mut self[new_len..];
                self.len = new_len;
                ptr::drop_in_place(tail);
            }
        }
    }

    /// Remove all elements in the vector.
    pub fn clear(&mut self) {