1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(generator_trait)]
12 #![feature(generators)]
14 // Test that we cannot create a generator that returns a value of its
17 use std::ops::Generator;
19 pub fn want_cyclic_generator_return<T>(_: T)
20 where T: Generator<Yield = (), Return = T>
24 fn supply_cyclic_generator_return() {
25 want_cyclic_generator_return(|| {
26 //~^ ERROR type mismatch
27 if false { yield None.unwrap(); }
32 pub fn want_cyclic_generator_yield<T>(_: T)
33 where T: Generator<Yield = T, Return = ()>
37 fn supply_cyclic_generator_yield() {
38 want_cyclic_generator_yield(|| {
39 //~^ ERROR type mismatch
40 if false { yield None.unwrap(); }