Equality

To check if two instances of your custom type are equal, consider using:

1. e.tid(a) == e.tid(b) to check if both variables belong to the same custom type.
2. e.eq(a, b) to check if both variables have the exact same type and fields.
   • This checks only tid and fields recursively, ignoring changes to other custom type data between package versions, and so is safer.
   • Although it is slower than == for very complex types, so you can use a == b instead for private types, or for templates.