9982de6397
Closes #12366. Parentheses around assignment statements such as let mut a = (0); a = (1); a += (2); are not necessary and therefore an unnecessary_parens warning is raised when statements like this occur. The warning mechanism was refactored along the way to allow for code reuse between the routines for checking expressions and statements. Code had to be adopted throughout the compiler and standard libraries to comply with this modification of the lint.
29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
// 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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#[deny(unnecessary_parens)];
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fn foo() -> int {
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return (1); //~ ERROR unnecessary parentheses around `return` value
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}
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fn main() {
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foo();
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if (true) {} //~ ERROR unnecessary parentheses around `if` condition
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while (true) {} //~ ERROR unnecessary parentheses around `while` condition
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match (true) { //~ ERROR unnecessary parentheses around `match` head expression
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_ => {}
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}
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let mut _a = (0); //~ ERROR unnecessary parentheses around assigned value
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_a = (0); //~ ERROR unnecessary parentheses around assigned value
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_a += (1); //~ ERROR unnecessary parentheses around assigned value
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}
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