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| author | Martin v. Löwis <martin@v.loewis.de> | 2008-03-19 05:04:44 +0000 |
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| committer | Martin v. Löwis <martin@v.loewis.de> | 2008-03-19 05:04:44 +0000 |
| commit | ef04c44e29a8276a484f58d03a75a2dec516302d (patch) | |
| tree | 6231aa6bb789345a6a86c60b0f547a7bfa19927f /Lib/lib2to3/PatternGrammar.txt | |
| parent | c42bcbb1f07723476cccd352eb0ae98ad2d1a809 (diff) | |
| download | cpython-git-ef04c44e29a8276a484f58d03a75a2dec516302d.tar.gz | |
Merged revisions 61596-61597 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r61596 | martin.v.loewis | 2008-03-18 23:43:46 -0500 (Di, 18 Mär 2008) | 2 lines
Import lib2to3.
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r61597 | martin.v.loewis | 2008-03-18 23:58:04 -0500 (Di, 18 Mär 2008) | 3 lines
Initialized merge tracking via "svnmerge" with revisions "1-61595" from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3
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Diffstat (limited to 'Lib/lib2to3/PatternGrammar.txt')
| -rw-r--r-- | Lib/lib2to3/PatternGrammar.txt | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Lib/lib2to3/PatternGrammar.txt b/Lib/lib2to3/PatternGrammar.txt new file mode 100644 index 0000000000..36bf814827 --- /dev/null +++ b/Lib/lib2to3/PatternGrammar.txt @@ -0,0 +1,28 @@ +# Copyright 2006 Google, Inc. All Rights Reserved. +# Licensed to PSF under a Contributor Agreement. + +# A grammar to describe tree matching patterns. +# Not shown here: +# - 'TOKEN' stands for any token (leaf node) +# - 'any' stands for any node (leaf or interior) +# With 'any' we can still specify the sub-structure. + +# The start symbol is 'Matcher'. + +Matcher: Alternatives ENDMARKER + +Alternatives: Alternative ('|' Alternative)* + +Alternative: (Unit | NegatedUnit)+ + +Unit: [NAME '='] ( STRING [Repeater] + | NAME [Details] [Repeater] + | '(' Alternatives ')' [Repeater] + | '[' Alternatives ']' + ) + +NegatedUnit: 'not' (STRING | NAME [Details] | '(' Alternatives ')') + +Repeater: '*' | '+' | '{' NUMBER [',' NUMBER] '}' + +Details: '<' Alternatives '>' |