noteq-definition

Flag a method definition for != (or ≠). Julia defines != as const != = !(==), so it is not meant to be overloaded: define == instead, and != follows automatically.

Defining != where == should carry the method:

!=(a::Grade, b::Grade) = a.score != b.score

warning: noteq-definition
 --> example.jl:1:1
  |
1 | !=(a::Grade, b::Grade) = a.score != b.score
  | ^^ `!=` is defined as `!(==)` and should not be overloaded; define `==` instead