use std::collections::HashMap;

struct T {
    id: i32,
    value: String,
}

fn main() {
    let tuples = vec![
        T {id: 42, value: "String".to_string()},
        T {id: 43, value: "String2".to_string()}
    ];
    let m: HashMap<_, _> = tuples.into_iter().map(|x| (x.id, x.value)).collect();
    println!("{:?}", m);
}