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Re: Valid struct cast?

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Please forgive the lateness of this followup.

Groovy hepcat Thiago Adams was jivin' in comp.lang.c on Fri, 13 Jan 2017
10:28 pm. It's a cool scene! Dig it.

> Is it safe to cast from 'FromArray' to 'ToArray'?
> 
> typedef struct
> {
>   Type1** pItems;
>   int size;
>   int capacity;
> } FromArray;
> 
> 
> typedef struct
> {
>   void** pItems;
>   int size;
>   int capacity;
> } ToArray;

  In short, no.
  Actually, it is not allowed. A cast operator can only be applied to
scalar (integer, floating and pointer) types, unless the resulting type
is void. You can't cast a struct to another struct.
  Chapter & verse:

  6.5.4 Cast operators

  ...

  Constraints

2       Unless the type name specifies a void type, the type name shall specify
atomic, qualified, or unqualified scalar type, and the operand shall have
scalar type.

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Valid struct cast? Thiago Adams <thiago.adams@gmail.com> - 2017-01-13 03:28 -0800
  Re: Valid struct cast? BartC <bc@freeuk.com> - 2017-01-13 12:12 +0000
    Re: Valid struct cast? Thiago Adams <thiago.adams@gmail.com> - 2017-01-13 04:29 -0800
      Re: Valid struct cast? Barry Schwarz <schwarzb@dqel.com> - 2017-01-13 08:11 -0800
        Re: Valid struct cast? supercat@casperkitty.com - 2017-01-13 09:09 -0800
        Re: Valid struct cast? Tim Rentsch <txr@alumni.caltech.edu> - 2017-01-14 01:01 -0800
  Re: Valid struct cast? "Peter \"Shaggy\" Haywood" <phaywood@alphalink.com.au> - 2017-01-25 14:19 +1100

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