b51698ad60
Caught as catchall patterns are: * unconditional name bindings * references to them * tuple bindings with catchall elements Fixes #31221.
50 lines
1.3 KiB
Rust
50 lines
1.3 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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enum Enum {
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Var1,
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Var2,
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}
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fn main() {
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use Enum::*;
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let s = Var1;
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match s {
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Var1 => (),
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Var3 => (),
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//~^ NOTE this pattern matches any value
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Var2 => (),
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//~^ ERROR unreachable pattern
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};
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match &s {
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&Var1 => (),
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&Var3 => (),
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//~^ NOTE this pattern matches any value
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&Var2 => (),
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//~^ ERROR unreachable pattern
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};
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let t = (Var1, Var1);
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match t {
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(Var1, b) => (),
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(c, d) => (),
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//~^ NOTE this pattern matches any value
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anything => ()
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//~^ ERROR unreachable pattern
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};
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// `_` need not emit a note, it is pretty obvious already.
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let t = (Var1, Var1);
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match t {
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(Var1, b) => (),
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_ => (),
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anything => ()
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//~^ ERROR unreachable pattern
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};
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}
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