ext/ply/ANNOUNCE

   1 March 24, 2009
   2
   3                   Announcing :  PLY-3.2 (Python Lex-Yacc)
   4
   5                         http://www.dabeaz.com/ply
   6
   7 I'm pleased to announce a significant new update to PLY---a 100% Python
   8 implementation of the common parsing tools lex and yacc.  PLY-3.2 adds
   9 compatibility for Python 2.6 and 3.0, provides some new customization
  10 options, and cleans up a lot of internal implementation details.
  11
  12 If you are new to PLY, here are a few highlights:
  13
  14 -  PLY is closely modeled after traditional lex/yacc.  If you know how
  15    to use these or similar tools in other languages, you will find
  16    PLY to be comparable.
  17
  18 -  PLY provides very extensive error reporting and diagnostic
  19    information to assist in parser construction.  The original
  20    implementation was developed for instructional purposes.  As
  21    a result, the system tries to identify the most common types
  22    of errors made by novice users.
  23
  24 -  PLY provides full support for empty productions, error recovery,
  25    precedence rules, and ambiguous grammars.
  26
  27 -  Parsing is based on LR-parsing which is fast, memory efficient,
  28    better suited to large grammars, and which has a number of nice
  29    properties when dealing with syntax errors and other parsing
  30    problems. Currently, PLY can build its parsing tables using
  31    either SLR or LALR(1) algorithms.
  32
  33 More information about PLY can be obtained on the PLY webpage at:
  34
  35                    http://www.dabeaz.com/ply
  36
  37 PLY is freely available.
  38
  39 Cheers,
  40
  41 David Beazley (http://www.dabeaz.com)