Re: Lexical scoping bug with EXPR for EXPR?

Message-ID: <20020219192740.GF12268@Bagpuss.unfortu.net>

(with modifications)

p4raw-id: //depot/perl@14781

diff --git a/pod/perlsub.pod b/pod/perlsub.pod
index b929c98..7933dc2 100644 (file)
--- a/pod/perlsub.pod
+++ b/pod/perlsub.pod
@@ -327,12 +327,12 @@ the scope of $answer extends from its declaration through the rest
 of that conditional, including any C<elsif> and C<else> clauses, 
 but not beyond it.
 
-B<NOTE:> None of the foregoing text applies to C<if/unless>,
-C<while/until> or C<for> modifiers appended to simple statements. Such
-modifiers are not control structures and have no effect on scoping. The
-use of such modifiers in conjunction with C<my> is best avoided, as it may
-have unexpected effects.  A future release of Perl may define precise
-semantics for constructs such as C<my $foo = 1 if $bar>.
+B<NOTE:> The behaviour of a C<my> statement modified with a statement
+modifier conditional or loop construct (e.g. C<my $x if ...>) is
+B<undefined>.  The value of the C<my> variable may be C<undef>, any
+previously assigned value, or possibly anything else.  Don't rely on
+it.  Future versions of perl might do something different from the
+version of perl you try it out on.  Here be dragons.
 
 The C<foreach> loop defaults to scoping its index variable dynamically
 in the manner of C<local>.  However, if the index variable is