Visara Master Console Center Scripting Guide - Manual (Page 63)

Chapter 4 Regular Expressions
Scripting Guide 63
Precedence of Special Characters
The order of precedence, from high to low, is shown below:
Order Type Symbols
1 Collation-related bracket
symbols
[= =] [: :] [. .]
2 Escaped characters \
character>
3 Bracket expression [ ]
4 Grouping ( )
5 Single-character duplication * + ? {i,j}
6 Concatenation
7 Anchoring ^ $
8 Alternation |
Table 11. Regular Expression Matching, Order of Precedence
For example, the pattern ‘ab|cd’ is the same as ‘(ab)|(cd)’ but is not
equivalent to ‘a(b|c)d’.