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This function is mentioned in Sort, on sorting. It takes the
virtual code for a partial order relational operator and returns the
code for a function of two arguments. The left argument is a list item
and the right argument is a list of items of the same type, which is
already sorted with respect to the relational operator given as the
argument to insert
. The result of the function returned by
insert
is a list similar to its right argument but with the left
argument inserted in the proper position to maintain the order.
This code makes use of the self
, argument
, head
and tail
declarations associated with pairwise
.
insert = bu(compose,refer) (hired conditional)( constant compose(right,argument), couple( (hired conditional)( (hired compose)( identity, constant compose( couple(left,compose(head,right)), argument)), constant ( argument, couple( compose(head,compose(right,argument)), (hired meta)( self, couple( compose(left,argument), compose(tail,compose(right,argument))))))), constant argument)) |
As with the other higher order functions in this appendix, the only feasible ways to verify it would be either by formal proof or by some form of symbolic interpretation.
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