• Dan <twinbee41 skytopia.com> Sep 29 2007
• Frank Benoit <keinfarbton googlemail.com> Sep 29 2007
• Bill Baxter <dnewsgroup billbaxter.com> Sep 29 2007
• Frank Benoit <keinfarbton googlemail.com> Sep 29 2007
• Sean Kelly <sean f4.ca> Sep 29 2007

Dan <twinbee41 skytopia.com> writes:

Without using an array or struct, can D return more than one value from a
function? If not, why isn't this a desirable feature for a programming language
to have?

Frank Benoit <keinfarbton googlemail.com> writes:

Dan schrieb:
 Without using an array or struct, can D return more than one value from a
function? If not, why isn't this a desirable feature for a programming language
to have?


You can use "out" arguments or a tuple return type.

Bill Baxter <dnewsgroup billbaxter.com> writes:

Frank Benoit wrote:
 Dan schrieb:
 Without using an array or struct, can D return more than one value from a
function? If not, why isn't this a desirable feature for a programming language
to have?


 You can use "out" arguments or a tuple return type.


At the end of the video of Walter's talk at the NWCPP users group he 
says he'd like to add the ability to return tuples.  But I don't know if 
that's still something rattling around in his mind or not.

--bb

Frank Benoit <keinfarbton googlemail.com> writes:

Bill Baxter schrieb:
 Frank Benoit wrote:
 Dan schrieb:
 Without using an array or struct, can D return more than one value
 from a function? If not, why isn't this a desirable feature for a
 programming language to have?


 You can use "out" arguments or a tuple return type.


 At the end of the video of Walter's talk at the NWCPP users group he
 says he'd like to add the ability to return tuples.  But I don't know if
 that's still something rattling around in his mind or not.
 
 --bb


Hm right, functions cannot return a tuple directly.
In my current code I use

template Struct(T...){
  struct Struct{
    T t;
  }
}

and in functions....

Struct!(long, bool[]) get(){
  Struct!(long, bool[]) res;
  res.t[0] = 34;
  res.t[1] = [ true, false ];
  return res;
}

Sean Kelly <sean f4.ca> writes:

Dan wrote:
 Without using an array or struct, can D return more than one value from a
function? If not, why isn't this a desirable feature for a programming language
to have?


This is possible with user-defined tuples, but the built-in tuples need 
to be wrapped in a struct to do the same.


Sean