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1 October 2, 2015
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2
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3 Announcing : PLY-3.8 (Python Lex-Yacc)
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4
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5 http://www.dabeaz.com/ply
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6
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7 I'm pleased to announce PLY-3.7--a pure Python implementation of the
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8 common parsing tools lex and yacc. PLY-3.7 is a minor bug fix
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9 release. It supports both Python 2 and Python 3.
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10
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11 If you are new to PLY, here are a few highlights:
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12
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13 - PLY is closely modeled after traditional lex/yacc. If you know how
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14 to use these or similar tools in other languages, you will find
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15 PLY to be comparable.
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16
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17 - PLY provides very extensive error reporting and diagnostic
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18 information to assist in parser construction. The original
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19 implementation was developed for instructional purposes. As
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20 a result, the system tries to identify the most common types
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21 of errors made by novice users.
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22
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23 - PLY provides full support for empty productions, error recovery,
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24 precedence rules, and ambiguous grammars.
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25
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26 - Parsing is based on LR-parsing which is fast, memory efficient,
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27 better suited to large grammars, and which has a number of nice
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28 properties when dealing with syntax errors and other parsing
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29 problems. Currently, PLY can build its parsing tables using
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30 either SLR or LALR(1) algorithms.
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31
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32 More information about PLY can be obtained on the PLY webpage at:
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33
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34 http://www.dabeaz.com/ply
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35
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36 PLY is freely available.
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37
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38 Cheers,
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39
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40 David Beazley (http://www.dabeaz.com) |
