Static rustc_lint::noop_method_call::NOOP_METHOD_CALL
source · pub static NOOP_METHOD_CALL: &'static Lint
Expand description
The noop_method_call
lint detects specific calls to noop methods
such as a calling <&T as Clone>::clone
where T: !Clone
.
Example
#![warn(noop_method_call)]
struct Foo;
let foo = &Foo;
let clone: &Foo = foo.clone();
{{produces}}
Explanation
Some method calls are noops meaning that they do nothing. Usually such methods
are the result of blanket implementations that happen to create some method invocations
that end up not doing anything. For instance, Clone
is implemented on all &T
, but
calling clone
on a &T
where T
does not implement clone, actually doesn’t do anything
as references are copy. This lint detects these calls and warns the user about them.