pub static DUPLICATE_MACRO_ATTRIBUTES: &Lint
Expand description
The duplicate_macro_attributes
lint detects when a #[test]
-like built-in macro
attribute is duplicated on an item. This lint may trigger on bench
, cfg_eval
, test
and test_case
.
Example
ⓘ
#[test]
#[test]
fn foo() {}
This will produce:
warning: duplicated attribute
--> src/lib.rs:2:1
|
2 | #[test]
| ^^^^^^^
|
= note: `#[warn(duplicate_macro_attributes)]` on by default
Explanation
A duplicated attribute may erroneously originate from a copy-paste and the effect of it being duplicated may not be obvious or desirable.
For instance, doubling the #[test]
attributes registers the test to be run twice with no
change to its environment.