int_new()
instantiates a newint
node.int_type()
checks if the node is aint
node.int_<child>_get()
returns the<child>
node ofint
.int_<child>_set()
sets the new<child>
and deletes the old<child>
.int_<child>_rep()
sets the new<child>
and returns the old<child>
.