On Aug 14, 2008, at 10:22 PM, Michael Haufe wrote:
> function add2(x,y){
> if(!x){
> return y;
> }
> else{
> return add2(x--,y++); //recursion error
> };
> }
> function add3(x,y){
> if(!x){
> return y;
> }
> else{
> x--;
> return add3(x,y)++; //error: cannot assign to a
> function result
> }
> }
> ----------------------------------------------------------------------
> ------------
>
> The first function works as expected.
> The 2nd function goes into an infinite loop since the variables are
> apparently not assigned as expected before passed into the function
You want --x and ++y as the arguments to add2 -- pre-decrement and
pre-increment, not post-.
> The 3rd function throws an assignment error once it reaches the
> return.
Functions return rvalues, not lvalues, to use the C jargon.
> So my question is whether this behavior is by design or by accident?
Design.
/be
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