42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
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// Copyright 2014 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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struct S {
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o: Option<String>
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}
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// Make sure we don't reuse the same alloca when matching
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// on field of struct or tuple which we reassign in the match body.
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fn main() {
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let mut a = (0i, Some("right".into_string()));
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let b = match a.1 {
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Some(v) => {
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a.1 = Some("wrong".into_string());
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v
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}
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None => String::new()
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};
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println!("{}", b);
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assert_eq!(b, "right");
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let mut s = S{ o: Some("right".into_string()) };
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let b = match s.o {
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Some(v) => {
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s.o = Some("wrong".into_string());
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v
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}
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None => String::new(),
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};
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println!("{}", b);
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assert_eq!(b, "right");
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}
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