[cvs-nhc98] The unique selection has a unique highlight; shared occurr

[Malcolm Wallace]

malcolm: Thu Mar 21 19:17:05 CET 2002

Update of /usr/src/master/nhc/src/hat/tools
In directory hinken:/tmp/cvs-serv7057

Modified Files:
	HatTrail.hs LowLevel.hs SExp.hs 
Added Files:
	FFIExtensions.hs 
Log Message:
The unique selection has a unique highlight; shared occurrences of
the same subexpression have a different highlight.
Also, refactor some compiler-dependent imports into a single module,
FFIExtensions.