diff options
Diffstat (limited to 'tests/ui/lint/noop-method-call.rs')
| -rw-r--r-- | tests/ui/lint/noop-method-call.rs | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tests/ui/lint/noop-method-call.rs b/tests/ui/lint/noop-method-call.rs index 89b296635..dbcf2a513 100644 --- a/tests/ui/lint/noop-method-call.rs +++ b/tests/ui/lint/noop-method-call.rs @@ -19,18 +19,17 @@ fn main() { let clone_type_ref = &CloneType(1u32); let clone_type_ref_clone: CloneType<u32> = clone_type_ref.clone(); - // Calling clone on a double reference doesn't warn since the method call itself - // peels the outer reference off let clone_type_ref = &&CloneType(1u32); let clone_type_ref_clone: &CloneType<u32> = clone_type_ref.clone(); + //~^ WARNING using `.clone()` on a double reference, which returns `&CloneType<u32>` let non_deref_type = &PlainType(1u32); let non_deref_type_deref: &PlainType<u32> = non_deref_type.deref(); //~^ WARNING call to `.deref()` on a reference in this situation does nothing - // Dereferencing a &&T does not warn since it has collapsed the double reference let non_deref_type = &&PlainType(1u32); let non_deref_type_deref: &PlainType<u32> = non_deref_type.deref(); + //~^ WARNING using `.deref()` on a double reference, which returns `&PlainType<u32>` let non_borrow_type = &PlainType(1u32); let non_borrow_type_borrow: &PlainType<u32> = non_borrow_type.borrow(); @@ -41,7 +40,8 @@ fn main() { let non_borrow_type_borrow: &PlainType<u32> = non_borrow_type.borrow(); let xs = ["a", "b", "c"]; - let _v: Vec<&str> = xs.iter().map(|x| x.clone()).collect(); // ok, but could use `*x` instead + let _v: Vec<&str> = xs.iter().map(|x| x.clone()).collect(); // could use `*x` instead + //~^ WARNING using `.clone()` on a double reference, which returns `&str` } fn generic<T>(non_clone_type: &PlainType<T>) { |