Golang replace string edge case

FrancescoLuzzi commented 3 weeks ago

Bug Description

Can't replace a string with a new string containing a $ inside it. The golang docs on regexp.ReplaceAllString and regexp.Expand states that in this case you should use $$

Reproduction steps

select golang flavour
select substitution function
enter regular expression to match and replace
enter a substitution string like $$test

Expected Outcome

The substitution pattern should not error and return the modified string

Pretty sure this is a logic error, if you still need browser and os infos let me know

working-name commented 3 weeks ago

Go example run to recreate the edge case described: https://go.dev/play/p/TveUE4pFo6L?v=goprev

FrancescoLuzzi commented 3 weeks ago

Also this one https://go.dev/play/p/tv5Q7FFkt0v

In a nutshell, when you want to escape the capture group placeholders in a replaceString, instead of writing something like "\$" you'll need to write "$$"

firasdib / Regex101