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Or, for an example of actual-zero-overhead tree processing using the visitor pattern: https://medium.com/@swortelbernux/libraryless-reflection-in-...

The linked FAQ specifically talks about returning pointers to structs that fulfil the 'error' interface and why it's a bad idea.

Typed vs untyped nil means that, in practice, all functions must return an error of type 'error', and force clients to downcast at runtime: https://golang.org/doc/faq#nil_error Of …

The letter 'M' in the Roman alphabet is derived from the symbol for running water in phonecian, and the letter 'A' is a rotated cow's head. Phonecian is partly derived from Egyptia…