cade32acf6
for `Box<FnBox()>`. I found the alias was still handy because it is shorter than the fully written type. This is a [breaking-change]: convert code using `Invoke` to use `FnBox`, which is usually pretty straight-forward. Code using thunk mostly works if you change `Thunk::new => Box::new` and `foo.invoke(arg)` to `foo(arg)`.
51 lines
1.2 KiB
Rust
51 lines
1.2 KiB
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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// ignore-pretty
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// Don't panic on blocks without results
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// There are several tests in this run-pass that raised
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// when this bug was opened. The cases where the compiler
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// panics before the fix have a comment.
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#![feature(std_misc)]
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use std::thunk::Thunk;
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struct S {x:()}
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fn test(slot: &mut Option<Thunk<(),Thunk>>) -> () {
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let a = slot.take();
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let _a = match a {
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// `{let .. a(); }` would break
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Some(a) => { let _a = a(); },
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None => (),
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};
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}
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fn not(b: bool) -> bool {
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if b {
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!b
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} else {
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// `panic!(...)` would break
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panic!("Break the compiler");
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}
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}
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pub fn main() {
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// {} would break
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let _r = {};
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let mut slot = None;
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// `{ test(...); }` would break
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let _s : S = S{ x: { test(&mut slot); } };
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let _b = not(true);
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}
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