Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2005-01-23 17:26:12 -0800 (Sun, 23 Jan 2005)
Revision: 6478
Log message:
Make the Term_grammar produce terms of type "parsed_term", which
is an abstract type. This forces us to to do a term_of_parsed_term
and a type check before getting a real term.
All proofs still check.