b53454e2e4
This commit moves reflection (as well as the {:?} format modifier) to a new
libdebug crate, all of which is marked experimental.
This is a breaking change because it now requires the debug crate to be
explicitly linked if the :? format qualifier is used. This means that any code
using this feature will have to add `extern crate debug;` to the top of the
crate. Any code relying on reflection will also need to do this.
Closes #12019
[breaking-change]
38 lines
1.0 KiB
Rust
38 lines
1.0 KiB
Rust
// Copyright 2012 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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extern crate debug;
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enum f { g(int, int) }
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enum h { i(j, k) }
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enum j { l(int, int) }
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enum k { m(int, int) }
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fn main()
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{
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let _z = match g(1, 2) {
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g(x, x) => { println!("{:?}", x + x); }
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//~^ ERROR identifier `x` is bound more than once in the same pattern
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};
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let _z = match i(l(1, 2), m(3, 4)) {
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i(l(x, _), m(_, x)) //~ ERROR identifier `x` is bound more than once in the same pattern
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=> { println!("{:?}", x + x); }
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};
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let _z = match (1, 2) {
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(x, x) => { x } //~ ERROR identifier `x` is bound more than once in the same pattern
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};
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}
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