Which characters need to be escaped?

[afe]

Hello,

Which characters need to be escaped? If a character is escaped in a regular expression, "\" must be used instead of "`", except for "`r", "`n"?

Thanks.

[gregster]

Docs say: https://www.autohotkey.com/docs/misc/Re ... ndamentals

Escaped characters: Most characters like abc123 can be used literally inside a regular expression. However, the characters \.*?+[{|()^$ must be preceded by a backslash to be seen as literal. For example, \. is a literal period and \\ is a literal backslash. Escaping can be avoided by using \Q...\E. For example: \QLiteral Text\E.

`r and `n are part of the available options, just like `a: https://www.autohotkey.com/docs/misc/Re ... tm#Options
But

Within a regular expression, special characters such as tab and newline can be escaped with either an accent (`) or a backslash (\). For example, `t is the same as \t except when the x option is used.

(https://www.autohotkey.com/docs/command ... tm#Remarks)

[safetycar]

Another doc reference: https://www.autohotkey.com/docs/command ... peChar.htm

[jeeswg]

Some content from:
jeeswg's characters tutorial - AutoHotkey Community
https://autohotkey.com/boards/viewtopic.php?f=7&t=26486

Code: Select all

;RegEx escape characters:
;12 characters that need escaping in RegEx generally: \.*?+[{|()^$
;4 characters that need escaping in a RegEx character class: ^-]\

;RegEx: note: \x22 [double quote]

;#EscapeChar - Syntax & Usage | AutoHotkey
;https://autohotkey.com/docs/commands/_EscapeChar.htm
;escape characters in AutoHotkey expressions:
;`` `a `b `f `n `r `t `v
;`; [needed when ; is preceded by a space/tab]
;"" [AHK v1]
;`" [AHK v2]

[afe]

Thanks. I found that in the regular expression, the "\" must be used , of course, "\n", "\r" can be "`n", "`r", except for options. However, "`" must be used by default in general expressions.

https://www.autohotkey.com/docs/command ... peChar.htm
This document seems to be incomplete because I didn't find "}", but in fact it must also be escaped.