rust/src/test/run-pass/proc-bounds.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.

fn foo<T>() {}
fn bar<T>(_: T) {}

fn is_send<T: Send>() {}
fn is_freeze<T: Sync>() {}
fn is_static<T: 'static>() {}

pub fn main() {
    foo::<proc()>();
    foo::<proc()>();
    foo::<proc():Send>();
    foo::<proc():Send + Sync>();
    foo::<proc():'static + Send + Sync>();

    is_send::<proc():Send>();
    is_freeze::<proc():Sync>();
    is_static::<proc():'static>();


    let a = 3i;
    bar::<proc()>(proc() {
        let b = &a;
        println!("{}", *b);
    });
}