OpenEuphoria

Re: Pass by Reference

• Posted by dcuny Jan 14, 2015
• 2082 views

With disparate values, why would you want to use multiple returns here? Wouldn't this make more sense (ignoring keywords, of course):

sequence result = get_operand() 
switch result[1] do 
   case P_REG then 
       { op, size, flags } = result 
   case P_VAR then 
       { op, size, n, type } = result 
   case P_MEM then 
       { op, size, scale, index, base, offset } = result 
   case P_LBL then 
       { op, lblidx } = result 
   case P_IMM then 
       { op, atom } = result 
end case 

When different kinds of things are returned, using a sequence and the de-sequence operation makes sense. I'm certainly not advocating getting rid of that.

No compile time error to be had, if f() is returning a single value. No runtime error, either... Assuming f() is returning a sequence.

On the other hand, if you'd written:

a,b[1],{c[2..3],{d,?,e[4]}} = f() 

and f() doesn't returns two values, you've got a compile time error.

- David