src/test/run-pass/issue-21033.rs

// Copyright 2014 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.
// pretty-expanded FIXME #23616

#![feature(box_patterns)]
#![feature(box_syntax)]

enum E {
    StructVar { boxed: Box<i32> }
}

fn main() {

    // Test matching each shorthand notation for field patterns.
    let mut a = E::StructVar { boxed: box 3 };
    match a {
        E::StructVar { box boxed } => { }
    }
    match a {
        E::StructVar { box ref boxed } => { }
    }
    match a {
        E::StructVar { box mut boxed } => { }
    }
    match a {
        E::StructVar { box ref mut boxed } => { }
    }
    match a {
        E::StructVar { ref boxed } => { }
    }
    match a {
        E::StructVar { ref mut boxed } => { }
    }
    match a {
        E::StructVar { mut boxed } => { }
    }

    // Test matching non shorthand notation. Recreate a since last test
    // moved `boxed`
    let mut a = E::StructVar { boxed: box 3 };
    match a {
        E::StructVar { boxed: box ref mut num } => { }
    }
    match a {
        E::StructVar { boxed: ref mut num } => { }
    }

}