diagnostic item, lang item or neither.
```rust
-use clippy_utils::{implements_trait, is_trait_method, match_trait_method, paths};
+use clippy_utils::ty::implements_trait;
+use clippy_utils::is_trait_method;
use rustc_span::symbol::sym;
impl LateLintPass<'_> for MyStructLint {
.map_or(false, |id| implements_trait(cx, ty, id, &[])) {
// `expr` implements `Drop` trait
}
-
- // 3. Using the type path with the expression
- // we use `match_trait_method` function from Clippy's utils
- // (This method should be avoided if possible)
- if match_trait_method(cx, expr, &paths::INTO) {
- // `expr` implements `Into` trait
- }
}
}
```
crates
```rust
- #[macro_use]
- extern crate a_crate_with_macros;
+ use rustc_middle::lint::in_external_macro;
+
+ use a_crate_with_macros::foo;
// `foo` is defined in `a_crate_with_macros`
foo!("bar");