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closure kind, thereby detecting what happens if there are mismatches. Simply removing the `:` annotations caused most of these tests to pass or produce other errors, because the inference would convert the closure into a more appropriate kind. (The ability to override the inference by using the expected type is an important backdoor partly for this reason.)
20 lines
641 B
Rust
20 lines
641 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(unboxed_closures)]
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fn to_fn_once<A,F:FnOnce<A>>(f: F) -> F { f }
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fn main() {
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let f = to_fn_once(move|| ());
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f();
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f(); //~ ERROR use of moved value
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}
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