for..in loops about nitrogen HOT 2 CLOSED

list has a "next" method to get the next time.
list has an "iter" method that returns an iterator which has a "next" method.

The for loop does the following:

Before running loop:

• Turn list into an iterator object that lives on the stack
  • LoadAttribute "iter"

Prelude:

• Call .next() on TOS (iterator from above)
  • Call "next"
• Destruct returned array
  • Index 0 is the key or index
  • Index 1 is the value
    • Explode (new opcode?)
    • Dup
    • LoadIndex 0
    • Define key
    • Dup
    • LoadIndex 1
    • Define Val
• If only one ident on LHS, discard key
• Save key and value to LHS idents
• Exec loop
  • Normal loop code

After loop:

• Pop iter object
  • Pop

from nitrogen.

Need to allow non idents for RHS of in.

from nitrogen.