peek_poke/
vec_ext.rs

1// Copyright 2019 The Servo Project Developers. See the COPYRIGHT
2// file at the top-level directory of this distribution and at
3// http://rust-lang.org/COPYRIGHT.
4//
5// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8// option. This file may not be copied, modified, or distributed
9// except according to those terms.
10
11pub trait VecExt  {
12    type Item;
13    unsafe fn set_end_ptr(&mut self, end: *const Self::Item);
14}
15
16impl<T> VecExt for Vec<T> {
17    type Item = T;
18    unsafe fn set_end_ptr(&mut self, end: *const T) {
19        assert!(end as usize >= self.as_ptr() as usize);
20        let new_len = end as usize - self.as_ptr() as usize;
21        assert!(new_len <= self.capacity());
22        self.set_len(new_len);
23    }
24}
peek_poke/vec_ext.rs

peek_poke/
vec_ext.rs
