mk_condboolSyntax.mk_cond : term * term * term -> term
Constructs a conditional term.
mk_cond(t,t1,t2) constructs an application
COND t t1 t2. This is rendered by the prettyprinter as
if t then t1 else t2.
Fails if t is not of type bool or if
t2 and t2 are of different types.
The prettyprinter can be trained to print
if t then t1 else t2 as t => t1 | t2.