The module code you show in your scratchpad starts with: 

package Regexp::CharClasses::Thai;

[download]

but your script (above) has: 

use RegexpCharClassesThai;  #Regexp-CharClasses-Thai.pm

[download]

There's a naming mismatch. Assuming at least one of those is correct, you should have one of these three combinations: 

package Regexp::CharClasses::Thai;
use Regexp::CharClasses::Thai;
# Regexp/CharClasses/Thai.pm

package RegexpCharClassesThai;
use RegexpCharClassesThai;
# RegexpCharClassesThai.pm

package Regexp-CharClasses-Thai;
use Regexp-CharClasses-Thai;
# Regexp-CharClasses-Thai.pm

[download]

Of course, it's possible all of those are incorrect and you should have a fourth combination.

— Ken

In reply to Re^7: Listing out the characters included in a character class [naming mismatch] by kcott
in thread Listing out the characters included in a character class by Polyglot

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