mirror of
https://github.com/python/cpython.git
synced 2024-12-19 23:04:14 +08:00
ef04c44e29
svn+ssh://pythondev@svn.python.org/python/trunk ........ r61596 | martin.v.loewis | 2008-03-18 23:43:46 -0500 (Di, 18 Mär 2008) | 2 lines Import lib2to3. ........ 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 ........
29 lines
793 B
Plaintext
29 lines
793 B
Plaintext
# 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 '>'
|