X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Fop%2Ftie.t;h=281c0d97a09a497c17ebca8ffd6208b292d366a0;hb=04518cc3f43b495f85caf2ec89c8b06540a60f8c;hp=8b8eb64c5dcd6476e86376a4ee7b6def1b1bfab1;hpb=810d9308ad3234b6d649cdfae5bbe4bf70e41ce7;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/t/op/tie.t b/t/op/tie.t
old mode 100755
new mode 100644
index 8b8eb64..281c0d9
--- a/t/op/tie.t
+++ b/t/op/tie.t
@@ -1,12 +1,13 @@
 #!./perl
 
 # Add new tests to the end with format:
-# "########\n# test description\nTest code\nEXPECT\nWarn or die msgs (if any)\n"
+# ########
+#
+# # test description
+# Test code
+# EXPECT
+# Warn or die msgs (if any) at - line 1234
 #
-# This test script does NOT test the output of the test code.  It ONLY
-# checks warnings or croaks.  Todo tests should have TODO as the start
-# of the description.  Note also that warnings are not enabled:  if you
-# need to test a perl warning, enable its class in your test.
 
 chdir 't' if -d 't';
 @INC = '../lib';
@@ -14,37 +15,23 @@ $ENV{PERL5LIB} = "../lib";
 
 $|=1;
 
-# catch warnings into fatal errors
-$SIG{__WARN__} = sub { die "WARNING: @_" } ;
-$SIG{__DIE__}  = sub { die @_ };
-
 undef $/;
 @prgs = split /^########\n/m, <DATA>;
-print "1..", scalar @prgs, "\n";
 
+require './test.pl';
+plan(tests => scalar @prgs);
 for (@prgs){
     ++$i;
     my($prog,$expected) = split(/\nEXPECT\n/, $_, 2);
     print("not ok $i # bad test format\n"), next
         unless defined $expected;
-    my ($testname) = $prog =~ /^\n?(# .*)\n/;
+    my ($testname) = $prog =~ /^# (.*)\n/m;
     $testname ||= '';
-    eval "$prog" ;
-    $status = $?;
-    $results = $@ ;
+    $TODO = $testname =~ s/^TODO //;
     $results =~ s/\n+$//;
     $expected =~ s/\n+$//;
-    if ( $status || ($expected eq '') != ($results eq '') ||
-         $results !~ /^(WARNING: )?$expected/){
-	print STDERR "STATUS: $status\n";
-	print STDERR "PROG: $prog\n";
-	print STDERR "EXPECTED:\n$expected\n";
-	print STDERR "GOT:\n$results\n";
-	print "not ok $i $testname\n";
-    }
-    else {
-        print "ok $i $testname\n";
-    }
+
+    fresh_perl_is($prog, $expected, {}, $testname);
 }
 
 __END__
@@ -117,7 +104,7 @@ use Tie::Hash ;
 $a = tie %h, Tie::StdHash;
 untie %h;
 EXPECT
-untie attempted while 1 inner references still exist
+untie attempted while 1 inner references still exist at - line 6.
 ########
 
 # strict behaviour, with 1 extra references via tied generating an error
@@ -127,7 +114,7 @@ tie %h, Tie::StdHash;
 $a = tied %h;
 untie %h;
 EXPECT
-untie attempted while 1 inner references still exist
+untie attempted while 1 inner references still exist at - line 7.
 ########
 
 # strict behaviour, with 1 extra references which are destroyed
@@ -149,14 +136,14 @@ untie %h;
 EXPECT
 ########
 
-# strict error behaviour, with 2 extra references 
+# strict error behaviour, with 2 extra references
 use warnings 'untie';
 use Tie::Hash ;
 $a = tie %h, Tie::StdHash;
 $b = tied %h ;
 untie %h;
 EXPECT
-untie attempted while 2 inner references still exist
+untie attempted while 2 inner references still exist at - line 7.
 ########
 
 # strict behaviour, check scope of strictness.
@@ -173,6 +160,7 @@ $C = $B = tied %H ;
 untie %H;
 EXPECT
 ########
+
 # Forbidden aggregate self-ties
 sub Self::TIEHASH { bless $_[1], $_[0] }
 {
@@ -180,8 +168,9 @@ sub Self::TIEHASH { bless $_[1], $_[0] }
     tie %c, 'Self', \%c;
 }
 EXPECT
-Self-ties of arrays and hashes are not supported 
+Self-ties of arrays and hashes are not supported at - line 6.
 ########
+
 # Allowed scalar self-ties
 my $destroyed = 0;
 sub Self::TIESCALAR { bless $_[1], $_[0] }
@@ -190,33 +179,59 @@ sub Self::DESTROY   { $destroyed = 1; }
     my $c = 42;
     tie $c, 'Self', \$c;
 }
-die "self-tied scalar not DESTROYd" unless $destroyed == 1;
+die "self-tied scalar not DESTROYed" unless $destroyed == 1;
 EXPECT
 ########
+
 # Allowed glob self-ties
 my $destroyed = 0;
+my $printed   = 0;
 sub Self2::TIEHANDLE { bless $_[1], $_[0] }
 sub Self2::DESTROY   { $destroyed = 1; }
+sub Self2::PRINT     { $printed = 1; }
 {
     use Symbol;
     my $c = gensym;
     tie *$c, 'Self2', $c;
+    print $c 'Hello';
 }
-die "self-tied glob not DESTROYd" unless $destroyed == 1;
+die "self-tied glob not PRINTed" unless $printed == 1;
+die "self-tied glob not DESTROYed" unless $destroyed == 1;
 EXPECT
 ########
+
 # Allowed IO self-ties
 my $destroyed = 0;
 sub Self3::TIEHANDLE { bless $_[1], $_[0] }
 sub Self3::DESTROY   { $destroyed = 1; }
+sub Self3::PRINT     { $printed = 1; }
 {
     use Symbol 'geniosym';
     my $c = geniosym;
     tie *$c, 'Self3', $c;
+    print $c 'Hello';
 }
-die "self-tied IO not DESTROYd" unless $destroyed == 1;
+die "self-tied IO not PRINTed" unless $printed == 1;
+die "self-tied IO not DESTROYed" unless $destroyed == 1;
 EXPECT
 ########
+
+# TODO IO "self-tie" via TEMP glob
+my $destroyed = 0;
+sub Self3::TIEHANDLE { bless $_[1], $_[0] }
+sub Self3::DESTROY   { $destroyed = 1; }
+sub Self3::PRINT     { $printed = 1; }
+{
+    use Symbol 'geniosym';
+    my $c = geniosym;
+    tie *$c, 'Self3', \*$c;
+    print $c 'Hello';
+}
+die "IO tied to TEMP glob not PRINTed" unless $printed == 1;
+die "IO tied to TEMP glob not DESTROYed" unless $destroyed == 1;
+EXPECT
+########
+
 # Interaction of tie and vec
 
 my ($a, $b);
@@ -229,6 +244,7 @@ vec($b,1,1)=0;
 die unless $a eq $b;
 EXPECT
 ########
+
 # correct unlocalisation of tied hashes (patch #16431)
 use Tie::Hash ;
 tie %tied, Tie::StdHash;
@@ -236,4 +252,648 @@ tie %tied, Tie::StdHash;
 { local $tied{'foo'} } warn "tied hash bad unlocalize" if exists $tied{'foo'};
 { local $ENV{'foo'}  } warn "%ENV bad unlocalize" if exists $ENV{'foo'};
 EXPECT
+########
+
+# An attempt at lvalueable barewords broke this
+tie FH, 'main';
+EXPECT
+Can't modify constant item in tie at - line 3, near "'main';"
+Execution of - aborted due to compilation errors.
+########
+
+# localizing tied hash slices
+$ENV{FooA} = 1;
+$ENV{FooB} = 2;
+print exists $ENV{FooA} ? 1 : 0, "\n";
+print exists $ENV{FooB} ? 2 : 0, "\n";
+print exists $ENV{FooC} ? 3 : 0, "\n";
+{
+    local @ENV{qw(FooA FooC)};
+    print exists $ENV{FooA} ? 4 : 0, "\n";
+    print exists $ENV{FooB} ? 5 : 0, "\n";
+    print exists $ENV{FooC} ? 6 : 0, "\n";
+}
+print exists $ENV{FooA} ? 7 : 0, "\n";
+print exists $ENV{FooB} ? 8 : 0, "\n";
+print exists $ENV{FooC} ? 9 : 0, "\n"; # this should not exist
+EXPECT
+1
+2
+0
+4
+5
+6
+7
+8
+0
+########
+#
+# FETCH freeing tie'd SV
+sub TIESCALAR { bless [] }
+sub FETCH { *a = \1; 1 }
+tie $a, 'main';
+print $a;
+EXPECT
+########
+
+#  [20020716.007] - nested FETCHES
+
+sub F1::TIEARRAY { bless [], 'F1' }
+sub F1::FETCH { 1 }
+my @f1;
+tie @f1, 'F1';
+
+sub F2::TIEARRAY { bless [2], 'F2' }
+sub F2::FETCH { my $self = shift; my $x = $f1[3]; $self }
+my @f2;
+tie @f2, 'F2';
+
+print $f2[4][0],"\n";
+
+sub F3::TIEHASH { bless [], 'F3' }
+sub F3::FETCH { 1 }
+my %f3;
+tie %f3, 'F3';
+
+sub F4::TIEHASH { bless [3], 'F4' }
+sub F4::FETCH { my $self = shift; my $x = $f3{3}; $self }
+my %f4;
+tie %f4, 'F4';
+
+print $f4{'foo'}[0],"\n";
+
+EXPECT
+2
+3
+########
+# test untie() from within FETCH
+package Foo;
+sub TIESCALAR { my $pkg = shift; return bless [@_], $pkg; }
+sub FETCH {
+  my $self = shift;
+  my ($obj, $field) = @$self;
+  untie $obj->{$field};
+  $obj->{$field} = "Bar";
+}
+package main;
+tie $a->{foo}, "Foo", $a, "foo";
+my $s = $a->{foo}; # access once
+# the hash element should not be tied anymore
+print defined tied $a->{foo} ? "not ok" : "ok";
+EXPECT
+ok
+########
+# the tmps returned by FETCH should appear to be SCALAR
+# (even though they are now implemented using PVLVs.)
+package X;
+sub TIEHASH { bless {} }
+sub TIEARRAY { bless {} }
+sub FETCH {1}
+my (%h, @a);
+tie %h, 'X';
+tie @a, 'X';
+my $r1 = \$h{1};
+my $r2 = \$a[0];
+my $s = "$r1 ". ref($r1) . " $r2 " . ref($r2);
+$s=~ s/\(0x\w+\)//g;
+print $s, "\n";
+EXPECT
+SCALAR SCALAR SCALAR SCALAR
+########
+# [perl #23287] segfault in untie
+sub TIESCALAR { bless $_[1], $_[0] }
+my $var;
+tie $var, 'main', \$var;
+untie $var;
+EXPECT
+########
+# Test case from perlmonks by runrig
+# http://www.perlmonks.org/index.pl?node_id=273490
+# "Here is what I tried. I think its similar to what you've tried
+#  above. Its odd but convienient that after untie'ing you are left with
+#  a variable that has the same value as was last returned from
+#  FETCH. (At least on my perl v5.6.1). So you don't need to pass a
+#  reference to the variable in order to set it after the untie (here it
+#  is accessed through a closure)."
+use strict;
+use warnings;
+package MyTied;
+sub TIESCALAR {
+    my ($class,$code) = @_;
+    bless $code, $class;
+}
+sub FETCH {
+    my $self = shift;
+    print "Untie\n";
+    $self->();
+}
+package main;
+my $var;
+tie $var, 'MyTied', sub { untie $var; 4 };
+print "One\n";
+print "$var\n";
+print "Two\n";
+print "$var\n";
+print "Three\n";
+print "$var\n";
+EXPECT
+One
+Untie
+4
+Two
+4
+Three
+4
+########
+# [perl #22297] cannot untie scalar from within tied FETCH
+my $counter = 0;
+my $x = 7;
+my $ref = \$x;
+tie $x, 'Overlay', $ref, $x;
+my $y;
+$y = $x;
+$y = $x;
+$y = $x;
+$y = $x;
+#print "WILL EXTERNAL UNTIE $ref\n";
+untie $$ref;
+$y = $x;
+$y = $x;
+$y = $x;
+$y = $x;
+#print "counter = $counter\n";
+
+print (($counter == 1) ? "ok\n" : "not ok\n");
+
+package Overlay;
+
+sub TIESCALAR
+{
+        my $pkg = shift;
+        my ($ref, $val) = @_;
+        return bless [ $ref, $val ], $pkg;
+}
+
+sub FETCH
+{
+        my $self = shift;
+        my ($ref, $val) = @$self;
+        #print "WILL INTERNAL UNITE $ref\n";
+        $counter++;
+        untie $$ref;
+        return $val;
+}
+EXPECT
+ok
+########
+
+# [perl #948] cannot meaningfully tie $,
+package TieDollarComma;
+
+sub TIESCALAR {
+     my $pkg = shift;
+     return bless \my $x, $pkg;
+}
+
+sub STORE {
+    my $self = shift;
+    $$self = shift;
+    print "STORE set '$$self'\n";
+}
+
+sub FETCH {
+    my $self = shift;
+    print "<FETCH>";
+    return $$self;
+}
+package main;
+
+tie $,, 'TieDollarComma';
+$, = 'BOBBINS';
+print "join", "things", "up\n";
+EXPECT
+STORE set 'BOBBINS'
+join<FETCH>BOBBINSthings<FETCH>BOBBINSup
+########
+
+# test SCALAR method
+package TieScalar;
+
+sub TIEHASH {
+    my $pkg = shift;
+    bless { } => $pkg;
+}
+
+sub STORE {
+    $_[0]->{$_[1]} = $_[2];
+}
+
+sub FETCH {
+    $_[0]->{$_[1]}
+}
+
+sub CLEAR {
+    %{ $_[0] } = ();
+}
+
+sub SCALAR {
+    print "SCALAR\n";
+    return 0 if ! keys %{$_[0]};
+    sprintf "%i/%i", scalar keys %{$_[0]}, scalar keys %{$_[0]};
+}
+
+package main;
+tie my %h => "TieScalar";
+$h{key1} = "val1";
+$h{key2} = "val2";
+print scalar %h, "\n"
+    if %h; # this should also call SCALAR but implicitly
+%h = ();
+print scalar %h, "\n"
+    if !%h; # this should also call SCALAR but implicitly
+EXPECT
+SCALAR
+SCALAR
+2/2
+SCALAR
+SCALAR
+0
+########
+
+# test scalar on tied hash when no SCALAR method has been given
+package TieScalar;
+
+sub TIEHASH {
+    my $pkg = shift;
+    bless { } => $pkg;
+}
+sub STORE {
+    $_[0]->{$_[1]} = $_[2];
+}
+sub FETCH {
+    $_[0]->{$_[1]}
+}
+sub CLEAR {
+    %{ $_[0] } = ();
+}
+sub FIRSTKEY {
+    my $a = keys %{ $_[0] };
+    print "FIRSTKEY\n";
+    each %{ $_[0] };
+}
+
+package main;
+tie my %h => "TieScalar";
+
+if (!%h) {
+    print "empty\n";
+} else {
+    print "not empty\n";
+}
+
+$h{key1} = "val1";
+print "not empty\n" if %h;
+print "not empty\n" if %h;
+print "-->\n";
+my ($k,$v) = each %h;
+print "<--\n";
+print "not empty\n" if %h;
+%h = ();
+print "empty\n" if ! %h;
+EXPECT
+FIRSTKEY
+empty
+FIRSTKEY
+not empty
+FIRSTKEY
+not empty
+-->
+FIRSTKEY
+<--
+not empty
+FIRSTKEY
+empty
+########
+sub TIESCALAR { bless {} }
+sub FETCH { my $x = 3.3; 1 if 0+$x; $x }
+tie $h, "main";
+print $h,"\n";
+EXPECT
+3.3
+########
+sub TIESCALAR { bless {} }
+sub FETCH { shift()->{i} ++ }
+tie $h, "main";
+print $h.$h;
+EXPECT
+01
+########
+# Bug 53482 (and maybe others)
+sub TIESCALAR { my $foo = $_[1]; bless \$foo, $_[0] }
+sub FETCH { ${$_[0]} }
+tie my $x1, "main", 2;
+tie my $y1, "main", 8;
+print $x1 | $y1;
+print $x1 | $y1;
+tie my $x2, "main", "2";
+tie my $y2, "main", "8";
+print $x2 | $y2;
+print $x2 | $y2;
+EXPECT
+1010::
+########
+# Bug 36267
+sub TIEHASH  { bless {}, $_[0] }
+sub STORE    { $_[0]->{$_[1]} = $_[2] }
+sub FIRSTKEY { my $a = scalar keys %{$_[0]}; each %{$_[0]} }
+sub NEXTKEY  { each %{$_[0]} }
+sub DELETE   { delete $_[0]->{$_[1]} }
+sub CLEAR    { %{$_[0]} = () }
+$h{b}=1;
+delete $h{b};
+print scalar keys %h, "\n";
+tie %h, 'main';
+$i{a}=1;
+%h = %i;
+untie %h;
+print scalar keys %h, "\n";
+EXPECT
+0
+0
+########
+# Bug 37731
+sub foo::TIESCALAR { bless {value => $_[1]}, $_[0] }
+sub foo::FETCH { $_[0]->{value} }
+tie my $VAR, 'foo', '42';
+foreach my $var ($VAR) {
+    print +($var eq $VAR) ? "yes\n" : "no\n";
+}
+EXPECT
+yes
+########
+sub TIEARRAY { bless [], 'main' }
+{
+    local @a;
+    tie @a, 'main';
+}
+print "tied\n" if tied @a;
+EXPECT
+########
+sub TIEHASH { bless [], 'main' }
+{
+    local %h;
+    tie %h, 'main';
+}
+print "tied\n" if tied %h;
+EXPECT
+########
+# RT 20727: PL_defoutgv is left as a tied element
+sub TIESCALAR { return bless {}, 'main' }
+
+sub STORE {
+    select($_[1]);
+    $_[1] = 1;
+    select(); # this used to coredump or assert fail
+}
+tie $SELECT, 'main';
+$SELECT = *STDERR;
+EXPECT
+########
+# RT 23810: eval in die in FETCH can corrupt context stack
+
+my $file = 'rt23810.pm';
+
+my $e;
+my $s;
+
+sub do_require {
+    my ($str, $eval) = @_;
+    open my $fh, '>', $file or die "Can't create $file: $!\n";
+    print $fh $str;
+    close $fh;
+    if ($eval) {
+	$s .= '-ERQ';
+	eval { require $pm; $s .= '-ENDE' }
+    }
+    else {
+	$s .= '-RQ';
+	require $pm;
+    }
+    $s .= '-ENDRQ';
+    unlink $file;
+}
+
+sub TIEHASH { bless {} }
+
+sub FETCH {
+    # 10 or more syntax errors makes yyparse croak()
+    my $bad = q{$x+;$x+;$x+;$x+;$x+;$x+;$x+;$x+;$x+$x+;$x+;$x+;$x+;$x+;;$x+;};
+
+    if ($_[1] eq 'eval') {
+	$s .= 'EVAL';
+	eval q[BEGIN { die; $s .= '-X1' }];
+	$s .= '-BD';
+	eval q[BEGIN { $x+ }];
+	$s .= '-BS';
+	eval '$x+';
+	$s .= '-E1';
+	$s .= '-S1' while $@ =~ /syntax error at/g;
+	eval $bad;
+	$s .= '-E2';
+	$s .= '-S2' while $@ =~ /syntax error at/g;
+    }
+    elsif ($_[1] eq 'require') {
+	$s .= 'REQUIRE';
+	my @text = (
+	    q[BEGIN { die; $s .= '-X1' }],
+	    q[BEGIN { $x+ }],
+	    '$x+',
+	    $bad
+	);
+	for my $i (0..$#text) {
+	    $s .= "-$i";
+	    do_require($txt[$i], 0) if $e;;
+	    do_require($txt[$i], 1);
+	}
+    }
+    elsif ($_[1] eq 'exit') {
+	eval q[exit(0); print "overshot eval\n"];
+    }
+    else {
+	print "unknown key: '$_[1]'\n";
+    }
+    return "-R";
+}
+my %foo;
+tie %foo, "main";
+
+for my $action(qw(eval require)) {
+    $s = ''; $e = 0; $s .= main->FETCH($action); print "$action: s0=$s\n";
+    $s = ''; $e = 1; eval { $s .= main->FETCH($action)}; print "$action: s1=$s\n";
+    $s = ''; $e = 0; $s .= $foo{$action}; print "$action: s2=$s\n";
+    $s = ''; $e = 1; eval { $s .= $foo{$action}}; print "$action: s3=$s\n";
+}
+1 while unlink $file;
+
+$foo{'exit'};
+print "overshot main\n"; # shouldn't reach here
+
+EXPECT
+eval: s0=EVAL-BD-BS-E1-S1-E2-S2-S2-S2-S2-S2-S2-S2-S2-S2-S2-R
+eval: s1=EVAL-BD-BS-E1-S1-E2-S2-S2-S2-S2-S2-S2-S2-S2-S2-S2-R
+eval: s2=EVAL-BD-BS-E1-S1-E2-S2-S2-S2-S2-S2-S2-S2-S2-S2-S2-R
+eval: s3=EVAL-BD-BS-E1-S1-E2-S2-S2-S2-S2-S2-S2-S2-S2-S2-S2-R
+require: s0=REQUIRE-0-ERQ-ENDRQ-1-ERQ-ENDRQ-2-ERQ-ENDRQ-3-ERQ-ENDRQ-R
+require: s1=REQUIRE-0-RQ
+require: s2=REQUIRE-0-ERQ-ENDRQ-1-ERQ-ENDRQ-2-ERQ-ENDRQ-3-ERQ-ENDRQ-R
+require: s3=REQUIRE-0-RQ
+########
+# RT 8857: STORE incorrectly invoked for local($_) on aliased tied array
+#          element
+
+sub TIEARRAY { bless [], $_[0] }
+sub TIEHASH  { bless [], $_[0] }
+sub FETCH { $_[0]->[$_[1]] }
+sub STORE { $_[0]->[$_[1]] = $_[2] }
+
+
+sub f {
+    local $_[0];
+}
+tie @a, 'main';
+tie %h, 'main';
+
+foreach ($a[0], $h{a}) {
+    f($_);
+}
+# on failure, chucks up 'premature free' etc messages
+EXPECT
+########
+# RT 5475:
+# the initial fix for this bug caused tied scalar FETCH to be called
+# multiple times when that scalar was an element in an array. Check it
+# only gets called once now.
+
+sub TIESCALAR { bless [], $_[0] }
+my $c = 0;
+sub FETCH { $c++; 0 }
+sub FETCHSIZE { 1 }
+sub STORE { $c += 100; 0 }
+
 
+my (@a, %h);
+tie $a[0],   'main';
+tie $h{foo}, 'main';
+
+my $i = 0;
+my $x = $a[0] + $h{foo} + $a[$i] + (@a)[0];
+print "x=$x c=$c\n";
+EXPECT
+x=0 c=4
+########
+# Bug 68192 - numeric ops not calling mg_get when tied scalar holds a ref
+sub TIESCALAR { bless {}, __PACKAGE__ };
+sub STORE {};
+sub FETCH {
+ print "fetching... "; # make sure FETCH is called once per op
+ 123456
+};
+my $foo;
+tie $foo, __PACKAGE__;
+my $a = [1234567];
+$foo = $a;
+print "+   ", 0 + $foo, "\n";
+print "**  ", $foo**1, "\n";
+print "*   ", $foo*1, "\n";
+print "/   ", $foo*1, "\n";
+print "%   ", $foo%123457, "\n";
+print "-   ", $foo-0, "\n";
+print "neg ", - -$foo, "\n";
+print "int ", int $foo, "\n";
+print "abs ", abs $foo, "\n";
+print "==  ", 123456 == $foo, "\n";
+print "<   ", 123455 < $foo, "\n";
+print ">   ", 123457 > $foo, "\n";
+print "<=  ", 123456 <= $foo, "\n";
+print ">=  ", 123456 >= $foo, "\n";
+print "!=  ", 0 != $foo, "\n";
+print "<=> ", 123457 <=> $foo, "\n";
+EXPECT
+fetching... +   123456
+fetching... **  123456
+fetching... *   123456
+fetching... /   123456
+fetching... %   123456
+fetching... -   123456
+fetching... neg 123456
+fetching... int 123456
+fetching... abs 123456
+fetching... ==  1
+fetching... <   1
+fetching... >   1
+fetching... <=  1
+fetching... >=  1
+fetching... !=  1
+fetching... <=> 1
+########
+# Ties returning overloaded objects
+{
+ package overloaded;
+ use overload
+  '*{}' => sub { print '*{}'; \*100 },
+  '@{}' => sub { print '@{}'; \@100 },
+  '%{}' => sub { print '%{}'; \%100 },
+  '${}' => sub { print '${}'; \$100 },
+  map {
+   my $op = $_;
+   $_ => sub { print "$op"; 100 }
+  } qw< 0+ "" + ** * / % - neg int abs == < > <= >= != <=> >
+}
+$o = bless [], overloaded;
+
+sub TIESCALAR { bless {}, "" }
+sub FETCH { print "fetching... "; $o }
+sub STORE{}
+tie $ghew, "";
+
+$ghew=undef; 1+$ghew; print "\n";
+$ghew=undef; $ghew**1; print "\n";
+$ghew=undef; $ghew*1; print "\n";
+$ghew=undef; $ghew/1; print "\n";
+$ghew=undef; $ghew%1; print "\n";
+$ghew=undef; $ghew-1; print "\n";
+$ghew=undef; -$ghew; print "\n";
+$ghew=undef; int $ghew; print "\n";
+$ghew=undef; abs $ghew; print "\n";
+$ghew=undef; 1 == $ghew; print "\n";
+$ghew=undef; $ghew<1; print "\n";
+$ghew=undef; $ghew>1; print "\n";
+$ghew=undef; $ghew<=1; print "\n";
+$ghew=undef; $ghew >=1; print "\n";
+$ghew=undef; $ghew != 1; print "\n";
+$ghew=undef; $ghew<=>1; print "\n";
+$ghew=\*shrext; *$ghew; print "\n";
+$ghew=\@spled; @$ghew; print "\n";
+$ghew=\%frit; %$ghew; print "\n";
+$ghew=\$drile; $$ghew; print "\n";
+EXPECT
+fetching... +
+fetching... **
+fetching... *
+fetching... /
+fetching... %
+fetching... -
+fetching... neg
+fetching... int
+fetching... abs
+fetching... ==
+fetching... <
+fetching... >
+fetching... <=
+fetching... >=
+fetching... !=
+fetching... <=>
+fetching... *{}
+fetching... @{}
+fetching... %{}
+fetching... ${}