Handling of square brackets inside classes in regexes is broken #67
Description
When you have regexp like /[[]*+]/ it handles it somehow weirdly and you end up with an error
yaramod.ParserError: Error at 8.28: Syntax error: Unexpected regexp +, expected one of (, ), /, regexp |, regexp ?, regexp ^, regexp $, regexp ., regexp ., regexp \w, regexp \W, regexp \s, regexp \S, regexp \d, regexp \D, regexp \b, regex
p \B, regexp class
If you remove the first ] from the regexp (so /[[*+]/``) it works. The square brackets inside classes are handled somehow weirdly. Even if you escape them ]`. We don't have to build such a resistant parser that it will handle them when they are not escaped but I would expect that it doesn't fail when they are escaped.