6c50ee5abc
This is a sequel to November 2017's #46103 / 1a9dc2e9. It had been
reported (more than once—at least #19140, #44083, and #44565) that the
"never used" language was confusing for enum variants that were "used"
as match patterns, so the wording was changed to say never
"constructed" specifically for enum variants. More recently, the same
issue was raised for structs (#52325). It seems consistent to say
"constructed" here, too, for the same reasons.
We considered using more specific word "called" for unused functions
and methods (while we declined to do this in #46103, the rationale
given in the commit message doesn't actually make sense), but it turns
out that Cargo's test suite expects the "never used" message, and
maybe we don't care enough even to make a Cargo PR over such a petty
and subjective wording change.
This resolves #52325.
23 lines
635 B
Rust
23 lines
635 B
Rust
// Copyright 2017 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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// compile-pass
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#![warn(unused)]
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macro_rules! m {
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($a:tt $b:tt) => {
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$b $a; //~ WARN struct is never constructed
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}
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}
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fn main() {
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m!(S struct);
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}
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