src/test/run-pass/sync-send-iterators-in-libcollections.rs

// Copyright 2015 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

#![allow(warnings)]
#![feature(collections)]
#![feature(drain, enumset, collections_bound, btree_range, vecmap)]

extern crate collections;

use collections::BinaryHeap;
use collections::{BTreeMap, BTreeSet};
use collections::EnumSet;
use collections::LinkedList;
use collections::String;
use collections::Vec;
use collections::VecDeque;
use std::collections::HashMap;
use std::collections::HashSet;

use collections::Bound::Included;
use collections::enum_set::CLike;
use std::mem;

fn is_sync<T>(_: T) where T: Sync {}
fn is_send<T>(_: T) where T: Send {}

macro_rules! all_sync_send {
    ($ctor:expr, $($iter:ident),+) => ({
        $(
            let mut x = $ctor;
            is_sync(x.$iter());
            let mut y = $ctor;
            is_send(y.$iter());
        )+
    })
}

macro_rules! is_sync_send {
    ($ctor:expr, $iter:ident($($param:expr),+)) => ({
        let mut x = $ctor;
        is_sync(x.$iter($( $param ),+));
        let mut y = $ctor;
        is_send(y.$iter($( $param ),+));
    })
}

fn main() {
    // The iterator "generator" list should exhaust what corresponding
    // implementations have where `Sync` and `Send` semantics apply.
    all_sync_send!(BinaryHeap::<usize>::new(), iter, drain, into_iter);

    all_sync_send!(BTreeMap::<usize, usize>::new(), iter, iter_mut, into_iter, keys, values);
    is_sync_send!(BTreeMap::<usize, usize>::new(), range(Included(&0), Included(&9)));
    is_sync_send!(BTreeMap::<usize, usize>::new(), range_mut(Included(&0), Included(&9)));

    all_sync_send!(BTreeSet::<usize>::new(), iter, into_iter);
    is_sync_send!(BTreeSet::<usize>::new(), range(Included(&0), Included(&9)));
    is_sync_send!(BTreeSet::<usize>::new(), difference(&BTreeSet::<usize>::new()));
    is_sync_send!(BTreeSet::<usize>::new(), symmetric_difference(&BTreeSet::<usize>::new()));
    is_sync_send!(BTreeSet::<usize>::new(), intersection(&BTreeSet::<usize>::new()));
    is_sync_send!(BTreeSet::<usize>::new(), union(&BTreeSet::<usize>::new()));

    all_sync_send!(HashMap::<usize, usize>::new(), iter, iter_mut, drain, into_iter, keys, values);
    all_sync_send!(HashSet::<usize>::new(), iter, drain, into_iter);
    is_sync_send!(HashSet::<usize>::new(), difference(&HashSet::<usize>::new()));
    is_sync_send!(HashSet::<usize>::new(), symmetric_difference(&HashSet::<usize>::new()));
    is_sync_send!(HashSet::<usize>::new(), intersection(&HashSet::<usize>::new()));
    is_sync_send!(HashSet::<usize>::new(), union(&HashSet::<usize>::new()));

    all_sync_send!(LinkedList::<usize>::new(), iter, iter_mut, into_iter);

    #[derive(Copy, Clone)]
    #[repr(usize)]
    #[allow(dead_code)]
    enum Foo { A, B, C }
    impl CLike for Foo {
        fn to_usize(&self) -> usize {
            *self as usize
        }

        fn from_usize(v: usize) -> Foo {
            unsafe { mem::transmute(v) }
        }
    }
    all_sync_send!(EnumSet::<Foo>::new(), iter);

    all_sync_send!(VecDeque::<usize>::new(), iter, iter_mut, into_iter);
    is_sync_send!(VecDeque::<usize>::new(), drain(..));

    all_sync_send!(Vec::<usize>::new(), into_iter);
    is_sync_send!(Vec::<usize>::new(), drain(..));
    is_sync_send!(String::new(), drain(..));
}