error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:14:5
   |
LL |     mem::discriminant(&&Some(2));
   |     ^^^^^^^^^^^^^^^^^^---------^
   |                       |
   |                       help: try dereferencing: `&Some(2)`
   |
note: the lint level is defined here
  --> $DIR/mem_discriminant.rs:3:9
   |
LL | #![deny(clippy::mem_discriminant_non_enum)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: calling `mem::discriminant` on non-enum type `&std::option::Option<u8>`
  --> $DIR/mem_discriminant.rs:15:5
   |
LL |     mem::discriminant(&&None::<u8>);
   |     ^^^^^^^^^^^^^^^^^^------------^
   |                       |
   |                       help: try dereferencing: `&None::<u8>`

error: calling `mem::discriminant` on non-enum type `&Foo`
  --> $DIR/mem_discriminant.rs:16:5
   |
LL |     mem::discriminant(&&Foo::One(5));
   |     ^^^^^^^^^^^^^^^^^^-------------^
   |                       |
   |                       help: try dereferencing: `&Foo::One(5)`

error: calling `mem::discriminant` on non-enum type `&Foo`
  --> $DIR/mem_discriminant.rs:17:5
   |
LL |     mem::discriminant(&&Foo::Two(5));
   |     ^^^^^^^^^^^^^^^^^^-------------^
   |                       |
   |                       help: try dereferencing: `&Foo::Two(5)`

error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:21:5
   |
LL |     mem::discriminant(&ro);
   |     ^^^^^^^^^^^^^^^^^^---^
   |                       |
   |                       help: try dereferencing: `ro`

error: calling `mem::discriminant` on non-enum type `&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:22:5
   |
LL |     mem::discriminant(rro);
   |     ^^^^^^^^^^^^^^^^^^---^
   |                       |
   |                       help: try dereferencing: `*rro`

error: calling `mem::discriminant` on non-enum type `&&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:23:5
   |
LL |     mem::discriminant(&rro);
   |     ^^^^^^^^^^^^^^^^^^----^
   |                       |
   |                       help: try dereferencing: `*rro`

error: calling `mem::discriminant` on non-enum type `&&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:27:13
   |
LL |             mem::discriminant($param)
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^
...
LL |     mem_discriminant_but_in_a_macro!(&rro);
   |     ---------------------------------------
   |     |                                |
   |     |                                help: try dereferencing: `*rro`
   |     in this macro invocation
   |
   = note: this error originates in the macro `mem_discriminant_but_in_a_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

error: calling `mem::discriminant` on non-enum type `&&&&&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:34:5
   |
LL |     mem::discriminant(&rrrrro);
   |     ^^^^^^^^^^^^^^^^^^-------^
   |                       |
   |                       help: try dereferencing: `****rrrrro`

error: calling `mem::discriminant` on non-enum type `&&&std::option::Option<i32>`
  --> $DIR/mem_discriminant.rs:35:5
   |
LL |     mem::discriminant(*rrrrro);
   |     ^^^^^^^^^^^^^^^^^^-------^
   |                       |
   |                       help: try dereferencing: `****rrrrro`

error: aborting due to 10 previous errors