[perl #28171] wantarray docs should mention effect of eval { wantarray }

as reported by Tim Bunce. Add a note to this effect in perlfunc,
and regression tests for it.

p4raw-id: //depot/perl@22651

1 files changed, 11 insertions, 1 deletions

diff --git a/t/op/wantarray.t b/t/op/wantarray.t
index 28936f419c..350270d11c 100755
--- a/t/op/wantarray.t
+++ b/t/op/wantarray.t
@@ -1,6 +1,6 @@
 #!./perl
 
-print "1..9\n";
+print "1..12\n";
 sub context {
   my ( $cona, $testnum ) = @_;
   my $conb = (defined wantarray) ? ( wantarray ? 'A' : 'S' ) : 'V';
@@ -31,4 +31,14 @@ $a = scalar context('S',5);
   print +($c == 2) ? "ok 9\n" : "not ok 9\t# <$c>\n";
 }
 
+my $qcontext = q{
+  $q = (defined wantarray) ? ( wantarray ? 'A' : 'S' ) : 'V';
+};
+eval $qcontext;
+print $q eq 'V' ? "ok 10\n" : "not ok 10\n";
+$a = eval $qcontext;
+print $q eq 'S' ? "ok 11\n" : "not ok 11\n";
+@a = eval $qcontext;
+print $q eq 'A' ? "ok 12\n" : "not ok 12\n";
+
 1;