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Re: when to use a struct(ure) or a class?

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On Saturday, 25 July 2020 01:29:33 UTC+3, G G  wrote:
> On Friday, July 24, 2020 at 6:18:42 PM UTC-4, David Brown wrote:
> > On 25/07/2020 00:06, G G wrote:
> > > when do you choose a structure over a class when the 
> > > language supports functions inside of the struct(ure)
> > > definitions?
> > > 
> > 
> > Are you thinking specifically of C++, which has both "struct" and
> > "class" ?  (Maybe you have other languages in mind, but that's the only
> > one I know that fits your question.)  C++ as a language doesn't care
> > about "class" vs. "struct" - the only difference is the default
> > visibility of the members (private vs. public).  So it is a matter of
> > programmer style.  But a very common distinction is that types where the
> > data members have an invariant - some relationship between them that
> > should be kept - should be a "class" with private data members accessed
> > via methods (or sometimes friend functions).  A type where the data
> > members are basically independent and can reasonably be accessed
> > directly, would be a "struct" even if there are also member functions.
> > If there are virtual functions, or inheritance involved, you almost
> > certainly would call it a "class".
> > 
> > So a simple x, y point structure would be a "struct", while something
> > holding an array of data along with a current length would be a "class".
> 
> the language i'm thinking about as swift.

Swift allocates "struct" in stack and passes it by copying its value;
"class" it allocates dynamically and passes by (ref-counted) reference. 
So you choose "struct" or "class" depending on what way you want the
language to manage it.

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when to use a struct(ure) or a class? G G <gdotone@gmail.com> - 2020-07-24 15:06 -0700
  Re: when to use a struct(ure) or a class? David Brown <david.brown@hesbynett.no> - 2020-07-25 00:18 +0200
    Re: when to use a struct(ure) or a class? G G <gdotone@gmail.com> - 2020-07-24 15:29 -0700
      Re: when to use a struct(ure) or a class? David Brown <david.brown@hesbynett.no> - 2020-07-25 00:52 +0200
      Re: when to use a struct(ure) or a class? Öö Tiib <ootiib@hot.ee> - 2020-07-25 15:31 -0700
        Re: when to use a struct(ure) or a class? Julio Di Egidio <julio@diegidio.name> - 2020-07-26 02:11 -0700
          Re: when to use a struct(ure) or a class? Öö Tiib <ootiib@hot.ee> - 2020-07-27 08:37 -0700
  Re: when to use a struct(ure) or a class? Julio Di Egidio <julio@diegidio.name> - 2020-07-25 00:02 -0700
  Re: when to use a struct(ure) or a class? "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2020-07-25 09:16 +0200
    Re: when to use a struct(ure) or a class? Julio Di Egidio <julio@diegidio.name> - 2020-07-25 00:30 -0700

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