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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: How to get Ada to =?utf-8?Q?=E2=80=9Ccross?= the =?utf-8?Q?ch?=
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Date: Tue, 08 May 2018 23:42:58 -0700
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Date: 2018-05-08T23:42:58-07:00
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Jacob Sparre Andersen <jacob@jacob-sparre.dk> writes:
> Imagine it wasn't a string, but some other explicitly fixed size array.
> I can't see how the compiler in this case can preallocate the array on
> the primary stack as you write above.

If it's fixed size, what's the problem?

> It the explanation that C++ simply doesn't allow functions to return
> indefinite types, 

I'm not sure what you mean by an indefinite type.  If it means a type
whose size isn't known at compile time, then I wouldn't consider it
fixed size in the sense of the previous paragraph.  

https://en.wikipedia.org/wiki/Return_value_optimization

discusses this topic in more detail.