# "This IS structured code. It's just randomly structured."
-print "1..28\n";
+BEGIN {
+ chdir 't' if -d 't';
+ @INC = qw(. ../lib);
+ require "test.pl";
+}
+
+use warnings;
+use strict;
+plan tests => 80;
+our $TODO;
+
+my $deprecated = 0;
+local $SIG{__WARN__} = sub { if ($_[0] =~ m/jump into a construct/) { $deprecated++; } else { warn $_[0] } };
+our $foo;
while ($?) {
$foo = 1;
label1:
+ is($deprecated, 1);
+ $deprecated = 0;
$foo = 2;
goto label2;
} continue {
$foo = 0;
goto label4;
label3:
+ is($deprecated, 1);
+ $deprecated = 0;
$foo = 4;
goto label4;
}
+is($deprecated, 0);
goto label1;
$foo = 3;
label2:
-print "#1\t:$foo: == 2\n";
-if ($foo == 2) {print "ok 1\n";} else {print "not ok 1\n";}
+is($foo, 2, 'escape while loop');
+is($deprecated, 0);
goto label3;
label4:
-print "#2\t:$foo: == 4\n";
-if ($foo == 4) {print "ok 2\n";} else {print "not ok 2\n";}
+is($foo, 4, 'second escape while loop');
-$PERL = ($^O eq 'MSWin32') ? '.\perl' : ($^O eq 'MacOS') ? $^X : ($^O eq 'NetWare') ? 'perl' : './perl';
-$CMD = qq[$PERL -e "goto foo;" 2>&1 ];
-$x = `$CMD`;
-
-if ($x =~ /label/) {print "ok 3\n";} else {print "not ok 3\n";}
+my $r = run_perl(prog => 'goto foo;', stderr => 1);
+like($r, qr/label/, 'cant find label');
+my $ok = 0;
sub foo {
goto bar;
- print "not ok 4\n";
return;
bar:
- print "ok 4\n";
+ $ok = 1;
}
&foo;
+ok($ok, 'goto in sub');
sub bar {
- $x = 'bypass';
+ my $x = 'bypass';
eval "goto $x";
}
exit;
FINALE:
-print "ok 13\n";
+is(curr_test(), 20, 'FINALE');
# does goto LABEL handle block contexts correctly?
-
+# note that this scope-hopping differs from last & next,
+# which always go up-scope strictly.
+my $count = 0;
my $cond = 1;
for (1) {
if ($cond == 1) {
elsif ($cond == 0) {
OTHER:
$cond = 2;
- print "ok 14\n";
+ is($count, 0, 'OTHER');
+ $count++;
goto THIRD;
}
else {
THIRD:
- print "ok 15\n";
+ is($count, 1, 'THIRD');
+ $count++;
}
}
-print "ok 16\n";
+is($count, 2, 'end of loop');
# Does goto work correctly within a for(;;) loop?
# (BUG ID 20010309.004)
for(my $i=0;!$i++;) {
my $x=1;
goto label;
- label: print (defined $x?"ok ": "not ok ", "17\n")
+ label: is($x, 1, 'goto inside a for(;;) loop body from inside the body');
}
# Does goto work correctly going *to* a for(;;) loop?
# (make sure it doesn't skip the initializer)
my ($z, $y) = (0);
-FORL1: for($y="ok 18\n"; $z;) {print $y; goto TEST19}
-($y,$z) = ("not ok 18\n", 1);
+FORL1: for ($y=1; $z;) {
+ ok($y, 'goto a for(;;) loop, from outside (does initializer)');
+ goto TEST19}
+($y,$z) = (0, 1);
goto FORL1;
# Even from within the loop?
-
TEST19: $z = 0;
-FORL2: for($y="ok 19\n"; 1;) {
+FORL2: for($y=1; 1;) {
if ($z) {
- print $y;
+ ok($y, 'goto a for(;;) loop, from inside (does initializer)');
last;
}
- ($y, $z) = ("not ok 19\n", 1);
+ ($y, $z) = (0, 1);
goto FORL2;
}
# Does goto work correctly within a try block?
-# (BUG ID 20000313.004)
-
-my $ok = 0;
+# (BUG ID 20000313.004) - [perl #2359]
+$ok = 0;
eval {
my $variable = 1;
goto LABEL20;
LABEL20: $ok = 1 if $variable;
};
-print ($ok&&!$@ ? "ok 20\n" : "not ok 20\n");
+ok($ok, 'works correctly within a try block');
+is($@, "", '...and $@ not set');
# And within an eval-string?
-
-
$ok = 0;
eval q{
my $variable = 1;
goto LABEL21;
LABEL21: $ok = 1 if $variable;
};
-print ($ok&&!$@ ? "ok 21\n" : "not ok 21\n");
+ok($ok, 'works correctly within an eval string');
+is($@, "", '...and $@ still not set');
# Test that goto works in nested eval-string
};
$ok = 0 if $@;
}
-print ($ok ? "ok 22\n" : "not ok 22\n");
+ok($ok, 'works correctly in a nested eval string');
{
my $false = 0;
+ my $count;
$ok = 0;
{ goto A; A: $ok = 1 } continue { }
- print "not " unless $ok;
- print "ok 23 - #20357 goto inside /{ } continue { }/ loop\n";
+ ok($ok, '#20357 goto inside /{ } continue { }/ loop');
$ok = 0;
{ do { goto A; A: $ok = 1 } while $false }
- print "not " unless $ok;
- print "ok 24 - #20154 goto inside /do { } while ()/ loop\n";
-
+ ok($ok, '#20154 goto inside /do { } while ()/ loop');
$ok = 0;
foreach(1) { goto A; A: $ok = 1 } continue { };
- print "not " unless $ok;
- print "ok 25 - goto inside /foreach () { } continue { }/ loop\n";
+ ok($ok, 'goto inside /foreach () { } continue { }/ loop');
$ok = 0;
sub a {
A: { if ($false) { redo A; B: $ok = 1; redo A; } }
- goto B unless $r++
+ goto B unless $count++;
}
+ is($deprecated, 0);
a();
- print "not " unless $ok;
- print "ok 26 - #19061 loop label wiped away by goto\n";
+ ok($ok, '#19061 loop label wiped away by goto');
+ is($deprecated, 1);
+ $deprecated = 0;
$ok = 0;
+ my $p;
for ($p=1;$p && goto A;$p=0) { A: $ok = 1 }
- print "not " unless $ok;
- print "ok 27 - weird case of goto and for(;;) loop\n";
+ ok($ok, 'weird case of goto and for(;;) loop');
+ is($deprecated, 1);
+ $deprecated = 0;
}
# bug #9990 - don't prematurely free the CV we're &going to.
sub f1 {
my $x;
- goto sub { $x; print "ok 28 - don't prematurely free CV\n" }
+ goto sub { $x=0; ok(1,"don't prematurely free CV\n") }
}
f1();
+# bug #99850, which is similar - freeing the subroutine we are about to
+# go(in)to during a FREETMPS call should not crash perl.
+
+package _99850 {
+ sub reftype{}
+ DESTROY { undef &reftype }
+ eval { sub { my $guard = bless []; goto &reftype }->() };
+}
+like $@, qr/^Goto undefined subroutine &_99850::reftype at /,
+ 'goto &foo undefining &foo on sub cleanup';
+
+# bug #22181 - this used to coredump or make $x undefined, due to
+# erroneous popping of the inner BLOCK context
+
+undef $ok;
+for ($count=0; $count<2; $count++) {
+ my $x = 1;
+ goto LABEL29;
+ LABEL29:
+ $ok = $x;
+}
+is($ok, 1, 'goto in for(;;) with continuation');
+
+# bug #22299 - goto in require doesn't find label
+
+open my $f, ">Op_goto01.pm" or die;
+print $f <<'EOT';
+package goto01;
+goto YYY;
+die;
+YYY: print "OK\n";
+1;
+EOT
+close $f;
+
+$r = runperl(prog => 'use Op_goto01; print qq[DONE\n]');
+is($r, "OK\nDONE\n", "goto within use-d file");
+unlink_all "Op_goto01.pm";
+
+# test for [perl #24108]
+$ok = 1;
+$count = 0;
+sub i_return_a_label {
+ $count++;
+ return "returned_label";
+}
+eval { goto +i_return_a_label; };
+$ok = 0;
+
+returned_label:
+is($count, 1, 'called i_return_a_label');
+ok($ok, 'skipped to returned_label');
+
+# [perl #29708] - goto &foo could leave foo() at depth two with
+# @_ == PL_sv_undef, causing a coredump
+
+
+$r = runperl(
+ prog =>
+ 'sub f { return if $d; $d=1; my $a=sub {goto &f}; &$a; f() } f(); print qq(ok\n)',
+ stderr => 1
+ );
+is($r, "ok\n", 'avoid pad without an @_');
+
+goto moretests;
+fail('goto moretests');
exit;
bypass:
-print "ok 5\n";
+
+is(curr_test(), 9, 'eval "goto $x"');
# Test autoloading mechanism.
sub two {
- ($pack, $file, $line) = caller; # Should indicate original call stats.
- print "@_ $pack $file $line" eq "1 2 3 main $FILE $LINE"
- ? "ok 7\n"
- : "not ok 7\n";
+ my ($pack, $file, $line) = caller; # Should indicate original call stats.
+ is("@_ $pack $file $line", "1 2 3 main $::FILE $::LINE",
+ 'autoloading mechanism.');
}
sub one {
eval <<'END';
- sub one { print "ok 6\n"; goto &two; print "not ok 6\n"; }
+ no warnings 'redefine';
+ sub one { pass('sub one'); goto &two; fail('sub one tail'); }
END
goto &one;
}
-$FILE = __FILE__;
-$LINE = __LINE__ + 1;
+$::FILE = __FILE__;
+$::LINE = __LINE__ + 1;
&one(1,2,3);
-$wherever = NOWHERE;
-eval { goto $wherever };
-print $@ =~ /Can't find label NOWHERE/ ? "ok 8\n" : "not ok 8\n";
+{
+ my $wherever = 'NOWHERE';
+ eval { goto $wherever };
+ like($@, qr/Can't find label NOWHERE/, 'goto NOWHERE sets $@');
+}
# see if a modified @_ propagates
{
+ my $i;
package Foo;
- sub DESTROY { my $s = shift; print "ok $s->[0]\n"; }
- sub show { print "# @_\nnot ok $_[0][0]\n" if @_ != 5; }
+ sub DESTROY { my $s = shift; ::is($s->[0], $i, "destroy $i"); }
+ sub show { ::is(+@_, 5, "show $i",); }
sub start { push @_, 1, "foo", {}; goto &show; }
- for (9..11) { start(bless([$_]), 'bar'); }
+ for (1..3) { $i = $_; start(bless([$_]), 'bar'); }
}
sub auto {
goto &loadit;
}
-sub AUTOLOAD { print @_ }
+sub AUTOLOAD { $ok = 1 if "@_" eq "foo" }
+
+$ok = 0;
+auto("foo");
+ok($ok, 'autoload');
+
+{
+ my $wherever = 'FINALE';
+ goto $wherever;
+}
+fail('goto $wherever');
+
+moretests:
+# test goto duplicated labels.
+{
+ my $z = 0;
+ eval {
+ $z = 0;
+ for (0..1) {
+ L4: # not outer scope
+ $z += 10;
+ last;
+ }
+ goto L4 if $z == 10;
+ last;
+ };
+ like($@, qr/Can't "goto" into the middle of a foreach loop/,
+ 'catch goto middle of foreach');
+
+ $z = 0;
+ # ambiguous label resolution (outer scope means endless loop!)
+ L1:
+ for my $x (0..1) {
+ $z += 10;
+ is($z, 10, 'prefer same scope (loop body) to outer scope (loop entry)');
+ goto L1 unless $x;
+ $z += 10;
+ L1:
+ is($z, 10, 'prefer same scope: second');
+ last;
+ }
+
+ $z = 0;
+ L2:
+ {
+ $z += 10;
+ is($z, 10, 'prefer this scope (block body) to outer scope (block entry)');
+ goto L2 if $z == 10;
+ $z += 10;
+ L2:
+ is($z, 10, 'prefer this scope: second');
+ }
+
+
+ {
+ $z = 0;
+ while (1) {
+ L3: # not inner scope
+ $z += 10;
+ last;
+ }
+ is($z, 10, 'prefer this scope to inner scope');
+ goto L3 if $z == 10;
+ $z += 10;
+ L3: # this scope !
+ is($z, 10, 'prefer this scope to inner scope: second');
+ }
+
+ L4: # not outer scope
+ {
+ $z = 0;
+ while (1) {
+ L4: # not inner scope
+ $z += 1;
+ last;
+ }
+ is($z, 1, 'prefer this scope to inner,outer scopes');
+ goto L4 if $z == 1;
+ $z += 10;
+ L4: # this scope !
+ is($z, 1, 'prefer this scope to inner,outer scopes: second');
+ }
+
+ {
+ my $loop = 0;
+ for my $x (0..1) {
+ L2: # without this, fails 1 (middle) out of 3 iterations
+ $z = 0;
+ L2:
+ $z += 10;
+ is($z, 10,
+ "same label, multiple times in same scope (choose 1st) $loop");
+ goto L2 if $z == 10 and not $loop++;
+ }
+ }
+}
+
+# deep recursion with gotos eventually caused a stack reallocation
+# which messed up buggy internals that didn't expect the stack to move
+
+sub recurse1 {
+ unshift @_, "x";
+ no warnings 'recursion';
+ goto &recurse2;
+}
+sub recurse2 {
+ my $x = shift;
+ $_[0] ? +1 + recurse1($_[0] - 1) : 0
+}
+my $w = 0;
+$SIG{__WARN__} = sub { ++$w };
+is(recurse1(500), 500, 'recursive goto &foo');
+is $w, 0, 'no recursion warnings for "no warnings; goto &sub"';
+delete $SIG{__WARN__};
+
+# [perl #32039] Chained goto &sub drops data too early.
+
+sub a32039 { @_=("foo"); goto &b32039; }
+sub b32039 { goto &c32039; }
+sub c32039 { is($_[0], 'foo', 'chained &goto') }
+a32039();
+
+# [perl #35214] next and redo re-entered the loop with the wrong cop,
+# causing a subsequent goto to crash
+
+{
+ my $r = runperl(
+ stderr => 1,
+ prog =>
+'for ($_=0;$_<3;$_++){A: if($_==1){next} if($_==2){$_++;goto A}}print qq(ok\n)'
+ );
+ is($r, "ok\n", 'next and goto');
+
+ $r = runperl(
+ stderr => 1,
+ prog =>
+'for ($_=0;$_<3;$_++){A: if($_==1){$_++;redo} if($_==2){$_++;goto A}}print qq(ok\n)'
+ );
+ is($r, "ok\n", 'redo and goto');
+}
+
+# goto &foo not allowed in evals
+
+
+sub null { 1 };
+eval 'goto &null';
+like($@, qr/Can't goto subroutine from an eval-string/, 'eval string');
+eval { goto &null };
+like($@, qr/Can't goto subroutine from an eval-block/, 'eval block');
+
+# [perl #36521] goto &foo in warn handler could defeat recursion avoider
+
+{
+ my $r = runperl(
+ stderr => 1,
+ prog => 'my $d; my $w = sub { return if $d++; warn q(bar)}; local $SIG{__WARN__} = sub { goto &$w; }; warn q(foo);'
+ );
+ like($r, qr/bar/, "goto &foo in warn");
+}
+
+TODO: {
+ local $TODO = "[perl #43403] goto() from an if to an else doesn't undo local () changes";
+ our $global = "unmodified";
+ if ($global) { # true but not constant-folded
+ local $global = "modified";
+ goto ELSE;
+ } else {
+ ELSE: is($global, "unmodified");
+ }
+}
+
+is($deprecated, 0);
-auto("ok 12\n");
+#74290
+{
+ my $x;
+ my $y;
+ F1:++$x and eval 'return if ++$y == 10; goto F1;';
+ is($x, 10,
+ 'labels outside evals can be distinguished from the start of the eval');
+}
+
+goto wham_eth;
+die "You can't get here";
+
+wham_eth: 1 if 0;
+ouch_eth: pass('labels persist even if their statement is optimised away');
+
+$foo = "(0)";
+if($foo eq $foo) {
+ goto bungo;
+}
+$foo .= "(9)";
+bungo:
+format CHOLET =
+wellington
+.
+$foo .= "(1)";
+SKIP: {
+ skip_if_miniperl("no dynamic loading on miniperl, so can't load PerlIO::scalar", 1);
+ my $cholet;
+ open(CHOLET, ">", \$cholet);
+ write CHOLET;
+ close CHOLET;
+ $foo .= "(".$cholet.")";
+ is($foo, "(0)(1)(wellington\n)", "label before format decl");
+}
+
+$foo = "(A)";
+if($foo eq $foo) {
+ goto orinoco;
+}
+$foo .= "(X)";
+orinoco:
+sub alderney { return "tobermory"; }
+$foo .= "(B)";
+$foo .= "(".alderney().")";
+is($foo, "(A)(B)(tobermory)", "label before sub decl");
+
+$foo = "[0:".__PACKAGE__."]";
+if($foo eq $foo) {
+ goto bulgaria;
+}
+$foo .= "[9]";
+bulgaria:
+package Tomsk;
+$foo .= "[1:".__PACKAGE__."]";
+$foo .= "[2:".__PACKAGE__."]";
+package main;
+$foo .= "[3:".__PACKAGE__."]";
+is($foo, "[0:main][1:Tomsk][2:Tomsk][3:main]", "label before package decl");
+
+$foo = "[A:".__PACKAGE__."]";
+if($foo eq $foo) {
+ goto adelaide;
+}
+$foo .= "[Z]";
+adelaide:
+package Cairngorm {
+ $foo .= "[B:".__PACKAGE__."]";
+}
+$foo .= "[C:".__PACKAGE__."]";
+is($foo, "[A:main][B:Cairngorm][C:main]", "label before package block");
+
+our $obidos;
+$foo = "{0}";
+if($foo eq $foo) {
+ goto shansi;
+}
+$foo .= "{9}";
+shansi:
+BEGIN { $obidos = "x"; }
+$foo .= "{1$obidos}";
+is($foo, "{0}{1x}", "label before BEGIN block");
+
+$foo = "{A:".(1.5+1.5)."}";
+if($foo eq $foo) {
+ goto stepney;
+}
+$foo .= "{Z}";
+stepney:
+use integer;
+$foo .= "{B:".(1.5+1.5)."}";
+is($foo, "{A:3}{B:2}", "label before use decl");
+
+$foo = "<0>";
+if($foo eq $foo) {
+ goto tom;
+}
+$foo .= "<9>";
+tom: dick: harry:
+$foo .= "<1>";
+$foo .= "<2>";
+is($foo, "<0><1><2>", "first of three stacked labels");
+
+$foo = "<A>";
+if($foo eq $foo) {
+ goto beta;
+}
+$foo .= "<Z>";
+alpha: beta: gamma:
+$foo .= "<B>";
+$foo .= "<C>";
+is($foo, "<A><B><C>", "second of three stacked labels");
+
+$foo = ",0.";
+if($foo eq $foo) {
+ goto gimel;
+}
+$foo .= ",9.";
+alef: bet: gimel:
+$foo .= ",1.";
+$foo .= ",2.";
+is($foo, ",0.,1.,2.", "third of three stacked labels");
+
+# [perl #112316] Wrong behavior regarding labels with same prefix
+sub same_prefix_labels {
+ my $pass;
+ my $first_time = 1;
+ CATCH: {
+ if ( $first_time ) {
+ CATCHLOOP: {
+ if ( !$first_time ) {
+ return 0;
+ }
+ $first_time--;
+ goto CATCH;
+ }
+ }
+ else {
+ return 1;
+ }
+ }
+}
-$wherever = FINALE;
-goto $wherever;
+ok(
+ same_prefix_labels(),
+ "perl 112316: goto and labels with the same prefix doesn't get mixed up"
+);
https://perl5.git.perl.org / perl5.git / blobdiff