aexpr_new()
instantiates a newaexpr
node.aexpr_type()
checks if the node is aaexpr
node.aexpr_<child>_get()
returns the<child>
node ofaexpr
.aexpr_<child>_set()
sets the new<child>
and deletes the old<child>
.aexpr_<child>_rep()
sets the new<child>
and returns the old<child>
.