Expand description

The missing_debug_implementations lint detects missing implementations of fmt::Debug.


pub struct Foo;



Having a Debug implementation on all types can assist with debugging, as it provides a convenient way to format and display a value. Using the #[derive(Debug)] attribute will automatically generate a typical implementation, or a custom implementation can be added by manually implementing the Debug trait.

This lint is “allow” by default because adding Debug to all types can have a negative impact on compile time and code size. It also requires boilerplate to be added to every type, which can be an impediment.