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diff --git a/third_party/python/ply/ANNOUNCE b/third_party/python/ply/ANNOUNCE new file mode 100644 index 0000000000..c430051cf4 --- /dev/null +++ b/third_party/python/ply/ANNOUNCE @@ -0,0 +1,40 @@ +January 31, 2017 + + Announcing : PLY-3.10 (Python Lex-Yacc) + + http://www.dabeaz.com/ply + +I'm pleased to announce PLY-3.10--a pure Python implementation of the +common parsing tools lex and yacc. PLY-3.10 is a minor bug fix +release. It supports both Python 2 and Python 3. + +If you are new to PLY, here are a few highlights: + +- PLY is closely modeled after traditional lex/yacc. If you know how + to use these or similar tools in other languages, you will find + PLY to be comparable. + +- PLY provides very extensive error reporting and diagnostic + information to assist in parser construction. The original + implementation was developed for instructional purposes. As + a result, the system tries to identify the most common types + of errors made by novice users. + +- PLY provides full support for empty productions, error recovery, + precedence rules, and ambiguous grammars. + +- Parsing is based on LR-parsing which is fast, memory efficient, + better suited to large grammars, and which has a number of nice + properties when dealing with syntax errors and other parsing + problems. Currently, PLY can build its parsing tables using + either SLR or LALR(1) algorithms. + +More information about PLY can be obtained on the PLY webpage at: + + http://www.dabeaz.com/ply + +PLY is freely available. + +Cheers, + +David Beazley (http://www.dabeaz.com)
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