43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
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// Copyright 2018 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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// compile-pass
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#![allow(unreachable_patterns)]
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#![allow(unused_variables)]
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#![warn(unused_parens)]
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struct A {
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field: Option<String>,
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}
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fn main() {
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let x = 3;
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match x {
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(_) => {} //~ WARNING: unnecessary parentheses around pattern
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(y) => {} //~ WARNING: unnecessary parentheses around pattern
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(ref r) => {} //~ WARNING: unnecessary parentheses around pattern
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e @ 1...2 | (e @ (3...4)) => {}
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//~^ WARNING: unnecessary parentheses around pattern (3 ... 4)
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//~^ WARNING: unnecessary parentheses around pattern (e @ _)
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}
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let field = "foo".to_string();
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let x: Option<A> = Some(A { field: Some(field) });
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match x {
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Some(A {
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field: (ref a @ Some(_)),
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//~^ WARNING: unnecessary parentheses around pattern
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..
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}) => {}
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_ => {}
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}
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}
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