in reply to Re: Perl6: What is "idfirst letter"?
in thread Perl6: What is "idfirst letter"?

Well, in Perl5, "[" and U+0001 are allowed as the first (and only) character of an identifier, but I don't think anyone would consider them idfirst. I don't know if Perl6 has such exceptions.

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Re^3: Perl6: What is "idfirst letter"?
by moritz (Cardinal) on Sep 08, 2011 at 05:58 UTC
    No. There are special variables with "weird" names ($/, $!, $¢) but they aren't identifiers.

    I also don't think that [ counts as an identifier character in Perl 5, because you can't write sub [ { }

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