55 lines
1.3 KiB
Rust
55 lines
1.3 KiB
Rust
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// Copyright 2016 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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#![allow(unused_variables)]
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#![allow(unused_assignments)]
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#![allow(dead_code)]
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#![deny(unreachable_code)]
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#![feature(never_type)]
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fn a() {
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// The match is considered unreachable here, because the `return`
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// diverges:
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match {return} { }
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}
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fn b() {
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match () { () => return }
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println!("I am dead");
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}
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fn c() {
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match () { () if false => return, () => () }
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println!("I am not dead");
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}
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fn d() {
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match () { () if false => return, () => return }
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println!("I am dead");
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}
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fn e() {
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// Here the compiler fails to figure out that the `println` is dead.
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match () { () if return => (), () => return }
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println!("I am dead");
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}
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fn f() {
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match Some(()) { None => (), Some(()) => return }
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println!("I am not dead");
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}
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fn g() {
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match Some(()) { None => return, Some(()) => () }
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println!("I am not dead");
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}
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fn main() { }
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