mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-25 00:03:43 +00:00
cc622608db
`must_use_unit` lints unit-returning functions with a `#[must_use]` attribute, suggesting to remove it. `double_must_use` lints functions with a plain `#[must_use]` attribute, but which return a type which is already `#[must_use]`, so the attribute has no benefit. `must_use_candidate` is a pedantic lint that lints functions and methods that return some non-unit type that is not already `#[must_use]` and suggests to add the annotation.
28 lines
1.1 KiB
Plaintext
28 lines
1.1 KiB
Plaintext
error: this function has an empty `#[must_use]` attribute, but returns a type already marked as `#[must_use]`
|
|
--> $DIR/double_must_use.rs:4:1
|
|
|
|
|
LL | pub fn must_use_result() -> Result<(), ()> {
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= note: `-D clippy::double-must-use` implied by `-D warnings`
|
|
= help: either add some descriptive text or remove the attribute
|
|
|
|
error: this function has an empty `#[must_use]` attribute, but returns a type already marked as `#[must_use]`
|
|
--> $DIR/double_must_use.rs:9:1
|
|
|
|
|
LL | pub fn must_use_tuple() -> (Result<(), ()>, u8) {
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= help: either add some descriptive text or remove the attribute
|
|
|
|
error: this function has an empty `#[must_use]` attribute, but returns a type already marked as `#[must_use]`
|
|
--> $DIR/double_must_use.rs:14:1
|
|
|
|
|
LL | pub fn must_use_array() -> [Result<(), ()>; 1] {
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= help: either add some descriptive text or remove the attribute
|
|
|
|
error: aborting due to 3 previous errors
|
|
|