Re: Returning a Struct from a Function

On 11 Maj, 19:57, alex.j...@[EMAIL PROTECTED]
 wrote:
> Hello, newbie here.
>
> =A0 I'd like to know if there is a way to return a structure from a
> function, without creating any other intermediate variables. Also,
> this should be done such that the function can still be declared as
> inline.

Yes. Any ordinary function will likely do so. The compiler is allowed
to optimise this special case that has been given the name (N)RVO for
(Named) Return Value Optimisation and all recent compilers should be
able to use this strategy.
>
> =A0 More precisely, given the structure:
>
> struct TwoFields {
> =A0 =A0int Field_one;
> =A0 =A0int Field_two;
>
> }
>
> I want a function like the following one, but without the
> extra declaration, "TwoFields myReturnStruct;":
>
> inline TwoFields ReturnMyFields(int myInt) {
>
> TwoFields myReturnStruct;
>
> myReturnStruct.Field_one =3D myInt/2;
> myReturnStruct.Field_two =3D myInt%2;
>
> return myReturnStruct;
>
> }
>
This looks fine to me.

> =A0 The only reason I want this is speed efficiency, so if this is not
> worth doing please let me know.
I can sympathise with your attitude - I used to think that way
myself. But seriously: do you believe that the difference in execution
time for that function is going to make any difference?

/Peter