Portability and doc tweaks to PerlIO/XS stuff.

[p5sagit/p5-mst-13.2.git] / pod / perlsub.pod

diff --git a/pod/perlsub.pod b/pod/perlsub.pod
index 8ec39e3..cff3eda 100644 (file)
--- a/pod/perlsub.pod
+++ b/pod/perlsub.pod
@@ -169,7 +169,7 @@ Do not, however, be tempted to do this:
 
 Like the flattened incoming parameter list, the return list is also
 flattened on return.  So all you have managed to do here is stored
-everything in C<@a> and made C<@b> an empty list.  See 
+everything in C<@a> and made C<@b> empty.  See 
 L<Pass by Reference> for alternatives.
 
 A subroutine may be called using an explicit C<&> prefix.  The
@@ -327,9 +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.
 
-None of the foregoing text applies to C<if/unless> or C<while/until>
-modifiers appended to simple statements.  Such modifiers are not
-control structures and have no effect on scoping.
+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
@@ -724,7 +727,7 @@ table entries:
 
     sub ioqueue {
         local  (*READER, *WRITER);    # not my!
-        pipe    (READER,  WRITER);    or die "pipe: $!";
+        pipe    (READER,  WRITER)     or die "pipe: $!";
         return (*READER, *WRITER);
     }
     ($head, $tail) = ioqueue();