hallgren 22ba8d34ff Bump version of .gfo and .pgf files, improve error messages on version mismatch ...

Becacuse of the new special tokens added to the Symbol type, .gfo and .pgf
files produced with the current version of GF can not always be used with
older versions of GF and the PGF run-time system.

The PGF version number was increased from (2,0) to (2,1). GF can still
read version (2,0) and (1,0), so old PGF files continue to work.

The GFO version was increased from "GF03" to "GF04".

2015-06-23 12:58:14 +00:00

..

PGF

Bump version of .gfo and .pgf files, improve error messages on version mismatch

2015-06-23 12:58:14 +00:00

PGF.hs

drop the dependency to FST

2015-04-20 11:56:13 +00:00