Matching Unicode letters with RegExp

Question

I am in need of matching Unicode letters, similarly to PCRE's \p{L}.

Now, since Dart's RegExp class is based on ECMAScript's, it doesn't have the concept of \p{L}, sadly.

I'm looking into perhaps constructing a big character class that matches all Unicode letters, but I'm not sure where to start.

So, I want to match letters like:

foobar
מכון ראות

But the R symbol shouldn't be matched:

BlackBerry®

Neither should any ASCII control characters or punctuation marks, etc. Essentially every letter in every language Unicode supports, whether it's å, ä, φ or ת, they should match if they are actual letters.

Answer 1

I know this is an old question. But RegExp now supports unicode categories (since Dart 2.4) so you can do something like this:

RegExp alpha = RegExp(r'\p{Letter}', unicode: true);
print(alpha.hasMatch("f")); // true
print(alpha.hasMatch("ת")); // true
print(alpha.hasMatch("®")); // false