Static rustc_lint::non_ascii_idents::CONFUSABLE_IDENTS
source · pub static CONFUSABLE_IDENTS: &Lint
Expand description
The confusable_idents
lint detects visually confusable pairs between
identifiers.
§Example
// Latin Capital Letter E With Caron
pub const Ě: i32 = 1;
// Latin Capital Letter E With Breve
pub const Ĕ: i32 = 2;
{{produces}}
§Explanation
This lint warns when different identifiers may appear visually similar, which can cause confusion.
The confusable detection algorithm is based on Unicode® Technical
Standard #39 Unicode Security Mechanisms Section 4 Confusable
Detection. For every distinct identifier X execute
the function skeleton(X)
. If there exist two distinct identifiers X
and Y in the same crate where skeleton(X) = skeleton(Y)
report it.
The compiler uses the same mechanism to check if an identifier is too
similar to a keyword.
Note that the set of confusable characters may change over time. Beware that if you “forbid” this lint that existing code may fail in the future.