PTREE_IS_PTREE_CONV : conv
STRUCTURE
patriciaLib
SYNOPSIS
Conversion for evaluating applications of patricia$IS_PTREE.
DESCRIPTION
The conversion PTREE_IS_PTREE_CONV evaluates terms of the form IS_PTREE t where t is any tree constructed by patricia$Empty, patricia$Leaf and patricia$Branch. Well-formed trees correspond with those that can be constructed by patricia$ADD.
FAILURE
The conversion will fail if the supplied term is not a suitable application of patricia$IS_PTREE.
EXAMPLE
- patriciaLib.PTREE_IS_PTREE_CONV ``IS_PTREE Empty``;
> val it = |- IS_PTREE $= <{}> <=> T: thm

- patriciaLib.PTREE_IS_PTREE_CONV ``IS_PTREE (Branch 0 0 (Leaf 3 2) (Leaf 2 1))``;
> val it = |- IS_PTREE (Branch 0 0 (Leaf 3 2) (Leaf 2 1)) <=> T: thm

- patriciaLib.PTREE_IS_PTREE_CONV ``IS_PTREE (Branch 0 0 (Leaf 3 2) (Leaf 1 1))``;
> val it = |- IS_PTREE (Branch 0 0 (Leaf 3 2) (Leaf 1 1)) <=> F: thm
SEEALSO
PTREE_CONV
HOL  Kananaskis-10