Given the quality of the perl documentation, if such was introduced, I'd expect a note in perldelta or the constant.pm pod. Since there's nothing in there, I'd say, alas, No.

No scoped constant pragma (yet).

Since constants are implemented (still) as subroutines subject to inlining which occupy a CODE slot in the symbol table, there's no such thing until lexical globs are implemented (you wrote the primary patch for that).

Just trying reveals: 

#!/usr/local/bin/perl5.10.0

use constant FOO => 'quux';
{
   use constant FOO => 'bar';
}
my $foo = FOO;
print $foo,"\n";
__END__
Constant subroutine main::FOO redefined at /usr/local/lib/perl5/5.10.0
+/constant.pm line 115.
bar

[download]

--shmem 

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

In reply to Re: 5.10: Are scoped constants possible? by shmem
in thread 5.10: Are scoped constants possible? by BrowserUk

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