fadabd6fbb
This commit is just covering the feature gate itself and the tests that made direct use of `!` and thus need to opt back into the feature. A follow on commit brings back the other change that motivates the revert: Namely, going back to the old rules for falling back to `()`.
38 lines
1 KiB
Rust
38 lines
1 KiB
Rust
// 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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#![feature(never_type)]
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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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fn foo() {
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// No error here.
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let x;
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x = return; //~ ERROR unreachable
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}
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fn bar() {
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use std::ptr;
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let p: *mut ! = ptr::null_mut::<!>();
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unsafe {
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// Here we consider the `return` unreachable because
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// "evaluating" the `*p` has type `!`. This is somewhat
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// dubious, I suppose.
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*p = return; //~ ERROR unreachable
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}
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}
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fn baz() {
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let mut i = 0;
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*{return; &mut i} = 22; //~ ERROR unreachable
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}
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fn main() { }
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