push_mut

将值推送到向量的末尾，并返回对其的可变引用。

示例

use push_mut::PushMut;

fn main() {
    let mut v = Vec::with_capacity(1);
    let last = v.push_mut(1);
    assert_eq!(*last, 1);
    *last = 2;
    assert_eq!(*last, 2);   
}