// function. The variables in this slice are the closure function's
	// own copy of the variables, which are used within its function
	// body. They will also each have IsClosureVar set, and will have
	// Byval set if they're captured by value.
	ClosureVars []*Name

	// Enclosed functions that need to be compiled.
	// Populated during walk.
	Closures []*Func

	// Parents records the parent scope of each scope within a

func (iter *ClosureStructIter) Next() (n *ir.Name, typ *types.Type, offset int64) {
	if iter.next >= len(iter.closureVars) {
		return nil, nil, 0
	}
	n = iter.closureVars[iter.next]
	typ = n.Type()
	if !n.Byval() {
		typ = types.NewPtr(typ)
	}
	iter.next++
	offset = types.RoundUp(iter.offset, typ.Alignment())
	iter.offset = offset + typ.Size()
	return n, typ, offset