Question

Here are my requirements:

• 1-80 characters
• These characters are allowed:
  • alphanumeric
  • spaces
  • _ ( ) [ ] ! # , . & * + : ' / -

The regex I have below works, but in particular I’m not sure how to reuse the character class [\w\(\)\.\-\[\]!#,&*+:'\/]

[\w\(\)\.\-\[\]!#,&*+:'\/][\w\s\(\)\.\-\[\]!#,&*+:'\/]{0,79}

Update:

Thanks for all your answers, this one did the trick

^(?!\s)[\w\s().\-!#&]{1,80}$

Answer 1

If the first character can’t be white space try this:
(?!\s)[-\w\s().[\]\\!#,&*+:'/]{1,80}. You may want to “bracket” with ^ in the beginning and $ at the end ^(?!\s)[-\w\s().[\]\\!#,&*+:'/]{1,80}$, to have the regex match the whole string.