rust_vec_mem.rs

use std::mem;


fn main() {
    let mut a: Vec<i32> = vec![1, 2, 3];
    let mut b: Vec<i32> = vec![4, 5, 5];

    println!("i32 size of {}", mem::size_of::<i32>());

    println!("var a: {:?}", a.as_ptr());
    
    for i in 0..a.len() {
        println!("\tvar a[{}]: {:?}", i, &a[i] as *const i32);
    }
    
    println!("var b: {:?}", b.as_ptr());
    for i in 0..b.len() {
        println!("\tvar b[{}]: {:?}", i, &b[i] as *const i32);
    }

    a.append(&mut b);

    for i in 0..a.len() {
        println!("var a[{}] = {} - {:?}", i, &a[i], &a[i] as *const i32);
    }
}

実行結果

i32 size of 4
var a: 0x600001464030
	var a[0]: 0x600001464030
	var a[1]: 0x600001464034
	var a[2]: 0x600001464038
var b: 0x600001464040
	var b[0]: 0x600001464040
	var b[1]: 0x600001464044
	var b[2]: 0x600001464048
var a[0] = 1 - 0x600001661140
var a[1] = 2 - 0x600001661144
var a[2] = 3 - 0x600001661148
var a[3] = 4 - 0x60000166114c
var a[4] = 5 - 0x600001661150
var a[5] = 5 - 0x600001661154