//    ('[' for IndexExpr, 'if' for IfStmt, etc.)
	Pos() Pos
	SetPos(Pos)
	aNode()
}

type node struct {
	// commented out for now since not yet used
	// doc  *Comment // nil means no comment(s) attached
	pos Pos
}

func (n *node) Pos() Pos       { return n.pos }
func (n *node) SetPos(pos Pos) { n.pos = pos }
func (*node) aNode()           {}