globcompiler and groups

I'd like to use GlobCompiler and groups, but parens are being prefixed =
by a slash since they're in the __isPerl5MetaCharacter method.

For example:=20

Trying to match foo-bar
using a GlobCompiler and (*)-(*) won't match
using a Perl5Compiler and (.*)-(.*) will match

I can work around it by using a Perl5Compiler but I was curious if this =
was by design, and if so, is there an alternate way of defining groups?

Thanks,

Scott