File: deriving-meta-multiple.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg2-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 893,176 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (25 lines) | stat: -rw-r--r-- 561 bytes parent folder | download | duplicates (14)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
//@ run-pass
#![allow(unused_must_use)]
#![allow(unused_imports)]
#![allow(deprecated)]

use std::hash::{Hash, SipHasher};

// testing multiple separate deriving attributes
#[derive(PartialEq)]
#[derive(Clone)]
#[derive(Hash)]
struct Foo {
    bar: usize,
    baz: isize
}

fn hash<T: Hash>(_t: &T) {}

pub fn main() {
    let a = Foo {bar: 4, baz: -3};

    a == a;    // check for PartialEq impl w/o testing its correctness
    a.clone(); // check for Clone impl w/o testing its correctness
    hash(&a);  // check for Hash impl w/o testing its correctness
}