Known unknown escape sequence in Go

[Tong Sun]

I'm trying with simple Perl character class regular expression, which should be supported by Go (link). 

However, I'm getting "unknown escape sequence" errors. 

I'm wondering why, and how to make it works. 

The code is at,

https://play.golang.org/p/Owjs8wJFM1d

(was: https://play.golang.org/p/vpRzXOqYAa9)

and I found that `\w` or `\S` Perl character class are not supported. 

please help

$ go version

go version go1.8.3 linux/amd64

[andrey mirtchovski]

the backslash character means something within double quotes. either
escape it ("\S" becomes "\\S") or use backquotes (`\S`)

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[Lutz Horn]

> I'm trying with simple Perl character class regular expression, which
> should be supported by Go (link)

[...]
> and I found that `*\w*` or `*\S*` Perl character class are not supported.

You must escape the backslash as '\\w' etc:

https://play.golang.org/p/EEudvWCX_i6

Lutz