mirror of https://github.com/rust-lang/rust
54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
// ignore-tidy-linelength
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#![feature(lint_reasons)]
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#![warn(unused_mut)]
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#[expect(
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unused_mut,
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//~^ WARNING this lint expectation is unfulfilled [unfulfilled_lint_expectations]
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//~| NOTE `#[warn(unfulfilled_lint_expectations)]` on by default
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//~| NOTE this `expect` is overridden by a `allow` attribute before the `unused_mut` lint is triggered
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reason = "this `expect` is overridden by a `allow` attribute before the `unused_mut` lint is triggered"
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)]
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mod foo {
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fn bar() {
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#[allow(
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unused_mut,
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reason = "this overrides the previous `expect` lint level and allows the `unused_mut` lint here"
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)]
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let mut v = 0;
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}
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}
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#[expect(
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unused_mut,
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//~^ WARNING this lint expectation is unfulfilled [unfulfilled_lint_expectations]
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//~| NOTE this `expect` is overridden by a `warn` attribute before the `unused_mut` lint is triggered
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reason = "this `expect` is overridden by a `warn` attribute before the `unused_mut` lint is triggered"
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)]
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mod oof {
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#[warn(
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unused_mut,
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//~^ NOTE the lint level is defined here
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reason = "this overrides the previous `expect` lint level and warns about the `unused_mut` lint here"
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)]
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fn bar() {
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let mut v = 0;
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//~^ WARNING variable does not need to be mutable [unused_mut]
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//~| NOTE this overrides the previous `expect` lint level and warns about the `unused_mut` lint here
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//~| HELP remove this `mut`
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}
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}
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#[expect(unused_variables)]
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//~^ WARNING this lint expectation is unfulfilled
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#[forbid(unused_variables)]
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//~^ NOTE the lint level is defined here
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fn check_expect_then_forbid() {
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let this_is_my_function = 3;
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//~^ ERROR unused variable: `this_is_my_function` [unused_variables]
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//~| HELP if this is intentional, prefix it with an underscore
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}
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fn main() {}
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