[cvs-nhc98] Re-introduce pattern queries in hat-observe. There is now

[Malcolm Wallace]

malcolm: Thu May  2 21:26:07 CEST 2002

Update of /usr/src/master/nhc/src/hat/tools
In directory hinken:/tmp/cvs-serv17995

Modified Files:
	HatObserve.hs Makefile SExp.hs 
Added Files:
	Pattern.hs ParseLib.hs 
Log Message:
Re-introduce pattern queries in hat-observe.  There is now a proper
lexer and (combinator) parser for patterns, and it can deal with
infix constructors/variables using the normal Haskell syntax.  The
only caveat with infix patterns is that fixity is not known, so the
user must parenthesise them explicitly.