mirror of
https://github.com/microsoft/PowerToys.git
synced 2024-12-15 03:59:15 +08:00
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 '>'
|