Matthias Krüger 659382fa47 Rollup merge of #92959 - asquared31415:test-non-fn-help, r=estebank ... Add more info and suggestions to use of #[test] on invalid items This pr changes the diagnostics for using `#[test]` on an item that can't be used as a test to explain that the attribute has no meaningful effect on non-functions and suggests the use of `#[cfg(test)]` for conditional compilation instead. Example change: ```rs #[test] mod test {} ``` previously output ``` error: only functions may be used as tests --> src/lib.rs:2:1 | 2 | mod test {} | ^^^^^^^^^^^ ``` now outputs ``` error: the `#[test]` attribute may only be used on a non-associated function --> $DIR/test-on-not-fn.rs:3:1 | LL | #[test] | ^^^^^^^ LL | mod test {} | ----------- expected a non-associated function, found a module | = note: the `#[test]` macro causes a a function to be run on a test and has no effect on non-functions help: replace with conditional compilation to make the item only exist when tests are being run | LL | #[cfg(test)] | ~~~~~~~~~~~~ ```		2022-02-18 16:23:29 +01:00
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src	Rollup merge of #92959 - asquared31415:test-non-fn-help, r=estebank	2022-02-18 16:23:29 +01:00
Cargo.toml	Add a lint for duplicated attributes.	2021-12-15 23:43:13 +01:00