Re: New VSI post on Youtube

On 8/21/2024 2:13 PM, Arne Vajhøj wrote:

On 8/21/2024 8:26 AM, chrisq wrote:

On 8/21/24 02:25, Lawrence D'Oliveiro wrote:

On Tue, 20 Aug 2024 09:47:36 -0400, Arne Vajhøj wrote:

Few languages support multiple return values.

>
Even in C and Fortran, a function can return a struct.

>
Better to declare the struct externally, then pass a pointer
to it. Much tidier.

 In C one should definitely return a pointer to struct and not
a struct.
 It looks like VSI Fortran cannot return a structure as function
result, but VSI Pascal can return a record as function result.
 And it is returned as a pointer argument under the hood.
 $ type s.pas
module s;
 type
    iiituple = record
                  a : integer;
                  b : integer;
                  c : integer;
              end;
 [global]
function get : iiituple;

void get(struct iiituple *res);
 int main()
{
     struct iiituple res;
     get(&res);

Note that C follow the same convention, so:
struct iiituple get();
int main()
{
     struct iiituple res = get();
works just as well.
Arne