Im trying to write regular expression to restrict empty string and comma inside a string
example: string = ""(not allowed), s = "ab c!@#)(*&^%$#~"(allowed) s = "sfsfsf,sdfsdf"(not allowed)
The internsion of this regexp is to do a pattern matching in swagger documentation like this property: type: string pattern: "^[0-9A-Za-z_] $" value: type: object
I tried this regular expression ^(?!\s*$)[^,]*$ but it is not supported inside swagger doc
and I get this error in golang code for this regular expression
invalid or unsupported Perl syntax: `(?!`
Please help me with the regular expression
CodePudding user response：
You actually don't need a look ahead.
Just remove that lookahead expression and change * to which will require at least one character and simplify your regex to ^[^,] $
Let me know if that works or if you have more conditions.
Edit:
Considering @JvdV's comment (and he seems right), you can use following regex,
^\s*([^,\s] \s*) $
This will match if there is at least one non whitespace character and whole string will be rejected if there is even a single occurrence of a comma