Need RegExp.flags

[jmagaram]

I have a regular expression. I want to check if it starts with ^ and if not, create a new regular expression with ^ at the beginning. Like this...

 let patternMustStart = pattern => {
 let original = pattern->RegExp.source
 switch original->String.startsWith("^") {
 | true => pattern
 | false => RegExp.fromStringWithFlags("^"++original, ~flags=Js.Re.flags(pattern))
 }

The RegExp.flags function is missing. Must use Js.Re instead.