Zero-width Assertion

Description



Asserts a word boundary

B

Asserts anywhere except at a word boundary

^

Asserts position only at the beginning of a line

$

Asserts position only at the end of a line

A

Asserts position only at the beginning of a string

z

Asserts position only at the end of a string



Asserts position only at the end of a string or before the line break at the end of a string (if present)

G

Asserts position at the end of the previous match or at the start of the string for the very first match