symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/lib2to3/PatternGrammar.txt
author martin.trojer@nokia.com
Fri, 31 Jul 2009 15:01:17 +0100
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Initial QEMU (symbian-qemu-0.9.1-12) import
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# Copyright 2006 Google, Inc. All Rights Reserved.
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# Licensed to PSF under a Contributor Agreement.
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# A grammar to describe tree matching patterns.
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# Not shown here:
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# - 'TOKEN' stands for any token (leaf node)
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# - 'any' stands for any node (leaf or interior)
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# With 'any' we can still specify the sub-structure.
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# The start symbol is 'Matcher'.
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Matcher: Alternatives ENDMARKER
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Alternatives: Alternative ('|' Alternative)*
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Alternative: (Unit | NegatedUnit)+
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Unit: [NAME '='] ( STRING [Repeater]
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                 | NAME [Details] [Repeater]
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                 | '(' Alternatives ')' [Repeater]
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                 | '[' Alternatives ']'
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		 )
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NegatedUnit: 'not' (STRING | NAME [Details] | '(' Alternatives ')')
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Repeater: '*' | '+' | '{' NUMBER [',' NUMBER] '}'
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Details: '<' Alternatives '>'