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Subject: Re: [boost] [review] Review of Outcome (starts Fri-19-May)
From: Andrzej Krzemienski (akrzemi1_at_[hidden])
Date: 2017-05-18 21:02:07

2017-05-18 16:52 GMT+02:00 Niall Douglas via Boost <boost_at_[hidden]>:

> > It's interesting. Only after Peter's explanation I am able to see the
> > usefulness of outcome<>, at least this part of the interface. It looks
> like
> > you - Peter - have the understanding of Niall's intentions. And I am
> > clearly lacking them. I would not be able to figure out this use case
> from
> > the tutorials of the reference.
> >
> > This gives me the impression that the library has a big potential, but it
> > may not succeed because of the failure to explain its power to potential
> > users.
> This has been a persistent problem over the past year.
> Once you've been using these things in your own code for a bit, for
> especially low level systems libraries you'd never willingly go back.
> The difference is very similar (to me at least) to that feeling you have
> when you must go back to writing C++ 98 without Boost after you've been
> using C++ 14 for a quite a while.

I trust your judgement on this. I just wish short examples in the docs
could convince me about that.

> All that said, 60-70% of C++ would see no benefit to using Outcome nor
> Expected. Such code is always better off using only C++ exceptions.

That leaves 30-40%, which is a huge market share. I claim about 95% of C++
would see no benefit in using `boost::variant`, but still the library is

> > It would really be helpful to see a section in the docs with a number of
> > examples simple as the ones above, explaining different use cases.
> I am hesitant to add even more length to the existing documentation.
> It's already long enough to put people off.

I understand your concern.

> A refactoring and shortening of the current length would be much more
> desirable.

It seems likely to me that documentation (the non-reference part)
consisting of a number of short annotated exaples could be shorter and
convey more information and motivation at the same time.


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