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Re: Introducing references

From: Victor Eijkhout <eijkhout_at_[hidden]>
Date: Thu, 27 Jan 2022 14:10:37 +0000

On , 2022Jan27, at 07:42, Peter Sommerlad (C++) <peter.cpp_at_[hidden]<mailto:peter.cpp_at_[hidden]>> wrote:

I teach to use those optionals as replacements for pointers and I introduce optional before pointers as a means to return from a potentially failing function.

Don’t get me wrong, I love std::optional. But

1. Either your students already need to be familiar with the “.value()” mechanism, which implies that they understand classes,
2. Or they need to internalize “*optionalresult” which looks like a dereference but isn’t, so that’s doubly confusing if they do come from a C background.

And all of this when you’re just starting to teach parameter passing, which is where I started the discussion….

I do teach optional, even in a beginning course, but several weeks after I’ve taught them parameter passing.


Received on 2022-01-27 14:10:40