Re: [BLACKBOX] Go

From: [at]} <Josef>
Date: Fri, 13 Nov 2009 09:53:23 +0100

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Hi Everybody!

I have just scanned the Go language spec and it looks a lot
like a mix from Oberon/CP and C with some interesting syntactical
ideas borrowed from functional languages, I guess,
but nothing really new.

Regarding OO features it seems weak to me.
It has type bound procedures but no inheritance.
It doesn't even have type extension for records as the
original Oberon introduced.
(Please correct me if I missed something in the spec.)

All it has is an interface type with structural equivalence rules.
An interface is a purely abstract type that only specifies a set of
method signatures. It is compatible with any type that has
the appropriate set of type bound procedures, which is checked
by the compiler.

I guess it would be very hard to program something like the Oberon
system with its many extensible message records in Go. The message
records would have to be expressed by interfaces with setter and getter
functions for accessing the record fields. And there is no subclassing for
creating extended message types.
It would also be very hard to program in a Java/C++-OO-style with
tons of methods inherited by subclasses. These would have to
be replicated by the programmer.
May be they envision a new OO-programminig style that
I am not aware of.

This is at least my understanding from the language spec.

A questionable point, in my oppinion, is the way exports are marked.
Go uses the convention that a name starting with a capital letter is public.
So when you decide to export a previously private name later on,
you have to change that name.
For me, the funniest part of the language spec is the name for threads in Go.
They are called 'goroutines'.

- JT

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Received on Fri Nov 13 2009 - 09:53:23 UTC