rust/src/test/run-pass/rec-tup.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.


#[derive(Copy, Clone)]
struct Point {x: isize, y: isize}

type rect = (Point, Point);

fn fst(r: rect) -> Point { let (fst, _) = r; return fst; }
fn snd(r: rect) -> Point { let (_, snd) = r; return snd; }

fn f(r: rect, x1: isize, y1: isize, x2: isize, y2: isize) {
    assert_eq!(fst(r).x, x1);
    assert_eq!(fst(r).y, y1);
    assert_eq!(snd(r).x, x2);
    assert_eq!(snd(r).y, y2);
}

pub fn main() {
    let r: rect = (Point {x: 10, y: 20}, Point {x: 11, y: 22});
    assert_eq!(fst(r).x, 10);
    assert_eq!(fst(r).y, 20);
    assert_eq!(snd(r).x, 11);
    assert_eq!(snd(r).y, 22);
    let r2 = r;
    let x: isize = fst(r2).x;
    assert_eq!(x, 10);
    f(r, 10, 20, 11, 22);
    f(r2, 10, 20, 11, 22);
}