Skip to main content

Browse the archive

Staging
v0.5.1
Revision a1f6fab46486ec431c04fe1b0c5c68d6e26f759d authored by Benjamin Peterson on 23 March 2013, 15:17:29 UTC, committed by Benjamin Peterson on 23 March 2013, 15:17:29 UTC 
version to 2.7.4rc1
1 parent 43cb4b7
Raw File
PatternGrammar.txt 
# 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 '>'
back to top