1935bbd913
For "symmetric" binary operators, meaning the types of two side must be equal, if the type of LHS doesn't know yet but RHS does, use that as an hint to infer LHS' type. Closes #21634
23 lines
737 B
Rust
23 lines
737 B
Rust
// Copyright 2015 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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fn main() {
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if let Ok(x) = "3.1415".parse() {
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assert_eq!(false, x <= 0.0);
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}
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if let Ok(x) = "3.1415".parse() {
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assert_eq!(3.1415, x + 0.0);
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}
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if let Ok(mut x) = "3.1415".parse() {
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assert_eq!(8.1415, { x += 5.0; x });
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}
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}
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