Introduction to Regular Expressions (Microsoft)--6. Order of Precedence

Microsoft | Regular priority order

After a regular expression is constructed, it can be evaluated like a mathematical expression, that is, it can be evaluated from left to right and in a priority order.

The following table lists the order of precedence for various regular expression operators from highest priority to lowest priority:

Operator description

\ escape Character

(), (?:), (? =), [] parentheses and square brackets

*, +,?, {n}, {n,}, {n,m} qualifier

^, $, \anymetacharacter position and order

| "or" action