Re: Returning a Struct from a Function

alex.j.k2@[EMAIL PROTECTED]
 wrote:
> Hello, newbie here.
> 
>   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.
> 
>   More precisely, given the structure:
> 
> struct TwoFields {
>    int Field_one;
>    int 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 = myInt/2;
> myReturnStruct.Field_two = myInt%2;
> 
> return myReturnStruct;
> }
> 
>   The only reason I want this is speed efficiency, so if this is not
> worth doing please let me know.

Premture optimization alert !

BTW - if you really want to do this - imho this is the easy way - and 
BTW - RVO will prolly happen.

TwoFields & f = ReturnMyFields(v);

Notice there is a tem****ary returned which is getting bound to a 
reference.  In theory, this will only get constructed once - in the 
function ReturnMyFields;  If your compiler is really smart, (and olot of 
them are) it will never hit memory and exist only in registers.

Unless you "know" this is an issue for you, don't bother worrying about
it.