rust 变量

struct Empty;

fn main() {
    let i1 :u32 = 1;
    let j = 2;
    let s1 : &str = "k";
    let s2 = "s2";
    let e = Empty;
    println!("{:p}",&e);
    let e2 = e;
    println!("{:p}",&e2);
    let e3 = Empty;
    println!("{:p}",&e3);
    println!("{:?}",std::ops::RangeFull);
}

0x7ffee3d11ed8
0x7ffee3d11f30
0x7ffee3d11f88

debug输出不同地址,release单元结构体会被优化为同一个对象,输出相同地址

RangeFull:为标准库表示全范围(..)的单元结构体