#!./perl
-# $Header: sort.t,v 4.0 91/03/20 01:54:38 lwall Locked $
+BEGIN {
+ chdir 't' if -d 't';
+ unshift @INC, '../lib';
+}
+use warnings;
+print "1..57\n";
-print "1..8\n";
+# XXX known to leak scalars
+{
+ no warnings 'uninitialized';
+ $ENV{PERL_DESTRUCT_LEVEL} = 0 unless $ENV{PERL_DESTRUCT_LEVEL} > 3;
+}
-sub reverse { $a lt $b ? 1 : $a gt $b ? -1 : 0; }
+# these shouldn't hang
+{
+ no warnings;
+ sort { for ($_ = 0;; $_++) {} } @a;
+ sort { while(1) {} } @a;
+ sort { while(1) { last; } } @a;
+ sort { while(0) { last; } } @a;
+}
+
+sub Backwards { $a lt $b ? 1 : $a gt $b ? -1 : 0 }
+sub Backwards_stacked($$) { my($a,$b) = @_; $a lt $b ? 1 : $a gt $b ? -1 : 0 }
+
+my $upperfirst = 'A' lt 'a';
+
+# Beware: in future this may become hairier because of possible
+# collation complications: qw(A a B c) can be sorted at least as
+# any of the following
+#
+# A a B b
+# A B a b
+# a b A B
+# a A b B
+#
+# All the above orders make sense.
+#
+# That said, EBCDIC sorts all small letters first, as opposed
+# to ASCII which sorts all big letters first.
@harry = ('dog','cat','x','Cain','Abel');
-@george = ('gone','chased','yz','Punished','Axed');
+@george = ('gone','chased','yz','punished','Axed');
$x = join('', sort @harry);
-print ($x eq 'AbelCaincatdogx' ? "ok 1\n" : "not ok 1\n");
+$expected = $upperfirst ? 'AbelCaincatdogx' : 'catdogxAbelCain';
+print "# 1: x = '$x', expected = '$expected'\n";
+print ($x eq $expected ? "ok 1\n" : "not ok 1\n");
-$x = join('', sort reverse @harry);
-print ($x eq 'xdogcatCainAbel' ? "ok 2\n" : "not ok 2\n");
+$x = join('', sort( Backwards @harry));
+$expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+print "# 2: x = '$x', expected = '$expected'\n";
+print ($x eq $expected ? "ok 2\n" : "not ok 2\n");
+
+$x = join('', sort( Backwards_stacked @harry));
+$expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+print "# 3: x = '$x', expected = '$expected'\n";
+print ($x eq $expected ? "ok 3\n" : "not ok 3\n");
$x = join('', sort @george, 'to', @harry);
-print ($x eq 'AbelAxedCainPunishedcatchaseddoggonetoxyz'?"ok 3\n":"not ok 3\n");
+$expected = $upperfirst ?
+ 'AbelAxedCaincatchaseddoggonepunishedtoxyz' :
+ 'catchaseddoggonepunishedtoxyzAbelAxedCain' ;
+print "# 4: x = '$x', expected = '$expected'\n";
+print ($x eq $expected ?"ok 4\n":"not ok 4\n");
@a = ();
@b = reverse @a;
-print ("@b" eq "" ? "ok 4\n" : "not ok 4 (@b)\n");
+print ("@b" eq "" ? "ok 5\n" : "not ok 5 (@b)\n");
@a = (1);
@b = reverse @a;
-print ("@b" eq "1" ? "ok 5\n" : "not ok 5 (@b)\n");
+print ("@b" eq "1" ? "ok 6\n" : "not ok 6 (@b)\n");
@a = (1,2);
@b = reverse @a;
-print ("@b" eq "2 1" ? "ok 6\n" : "not ok 6 (@b)\n");
+print ("@b" eq "2 1" ? "ok 7\n" : "not ok 7 (@b)\n");
@a = (1,2,3);
@b = reverse @a;
-print ("@b" eq "3 2 1" ? "ok 7\n" : "not ok 7 (@b)\n");
+print ("@b" eq "3 2 1" ? "ok 8\n" : "not ok 8 (@b)\n");
@a = (1,2,3,4);
@b = reverse @a;
-print ("@b" eq "4 3 2 1" ? "ok 8\n" : "not ok 8 (@b)\n");
+print ("@b" eq "4 3 2 1" ? "ok 9\n" : "not ok 9 (@b)\n");
+
+@a = (10,2,3,4);
+@b = sort {$a <=> $b;} @a;
+print ("@b" eq "2 3 4 10" ? "ok 10\n" : "not ok 10 (@b)\n");
+
+$sub = 'Backwards';
+$x = join('', sort $sub @harry);
+$expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+print "# 11: x = $x, expected = '$expected'\n";
+print ($x eq $expected ? "ok 11\n" : "not ok 11\n");
+
+$sub = 'Backwards_stacked';
+$x = join('', sort $sub @harry);
+$expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+print "# 12: x = $x, expected = '$expected'\n";
+print ($x eq $expected ? "ok 12\n" : "not ok 12\n");
+
+# literals, combinations
+
+@b = sort (4,1,3,2);
+print ("@b" eq '1 2 3 4' ? "ok 13\n" : "not ok 13\n");
+print "# x = '@b'\n";
+
+@b = sort grep { $_ } (4,1,3,2);
+print ("@b" eq '1 2 3 4' ? "ok 14\n" : "not ok 14\n");
+print "# x = '@b'\n";
+
+@b = sort map { $_ } (4,1,3,2);
+print ("@b" eq '1 2 3 4' ? "ok 15\n" : "not ok 15\n");
+print "# x = '@b'\n";
+
+@b = sort reverse (4,1,3,2);
+print ("@b" eq '1 2 3 4' ? "ok 16\n" : "not ok 16\n");
+print "# x = '@b'\n";
+
+# redefining sort sub inside the sort sub should fail
+sub twoface { *twoface = sub { $a <=> $b }; &twoface }
+eval { @b = sort twoface 4,1,3,2 };
+print ($@ =~ /redefine active sort/ ? "ok 17\n" : "not ok 17\n");
+
+# redefining sort subs outside the sort should not fail
+eval { no warnings 'redefine'; *twoface = sub { &Backwards } };
+print $@ ? "not ok 18\n" : "ok 18\n";
+
+eval { @b = sort twoface 4,1,3,2 };
+print ("@b" eq '4 3 2 1' ? "ok 19\n" : "not ok 19 |@b|\n");
+
+{
+ no warnings 'redefine';
+ *twoface = sub { *twoface = *Backwards; $a <=> $b };
+}
+eval { @b = sort twoface 4,1 };
+print ($@ =~ /redefine active sort/ ? "ok 20\n" : "not ok 20\n");
+
+{
+ no warnings 'redefine';
+ *twoface = sub {
+ eval 'sub twoface { $a <=> $b }';
+ die($@ =~ /redefine active sort/ ? "ok 21\n" : "not ok 21\n");
+ $a <=> $b;
+ };
+}
+eval { @b = sort twoface 4,1 };
+print $@ ? "$@" : "not ok 21\n";
+
+eval <<'CODE';
+ my @result = sort main'Backwards 'one', 'two';
+CODE
+print $@ ? "not ok 22\n# $@" : "ok 22\n";
+
+eval <<'CODE';
+ # "sort 'one', 'two'" should not try to parse "'one" as a sort sub
+ my @result = sort 'one', 'two';
+CODE
+print $@ ? "not ok 23\n# $@" : "ok 23\n";
+
+{
+ my $sortsub = \&Backwards;
+ my $sortglob = *Backwards;
+ my $sortglobr = \*Backwards;
+ my $sortname = 'Backwards';
+ @b = sort $sortsub 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 24\n" : "not ok 24 |@b|\n");
+ @b = sort $sortglob 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 25\n" : "not ok 25 |@b|\n");
+ @b = sort $sortname 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 26\n" : "not ok 26 |@b|\n");
+ @b = sort $sortglobr 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 27\n" : "not ok 27 |@b|\n");
+}
+
+{
+ my $sortsub = \&Backwards_stacked;
+ my $sortglob = *Backwards_stacked;
+ my $sortglobr = \*Backwards_stacked;
+ my $sortname = 'Backwards_stacked';
+ @b = sort $sortsub 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 28\n" : "not ok 28 |@b|\n");
+ @b = sort $sortglob 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 29\n" : "not ok 29 |@b|\n");
+ @b = sort $sortname 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 30\n" : "not ok 30 |@b|\n");
+ @b = sort $sortglobr 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 31\n" : "not ok 31 |@b|\n");
+}
+
+{
+ local $sortsub = \&Backwards;
+ local $sortglob = *Backwards;
+ local $sortglobr = \*Backwards;
+ local $sortname = 'Backwards';
+ @b = sort $sortsub 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 32\n" : "not ok 32 |@b|\n");
+ @b = sort $sortglob 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 33\n" : "not ok 33 |@b|\n");
+ @b = sort $sortname 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 34\n" : "not ok 34 |@b|\n");
+ @b = sort $sortglobr 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 35\n" : "not ok 35 |@b|\n");
+}
+
+{
+ local $sortsub = \&Backwards_stacked;
+ local $sortglob = *Backwards_stacked;
+ local $sortglobr = \*Backwards_stacked;
+ local $sortname = 'Backwards_stacked';
+ @b = sort $sortsub 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 36\n" : "not ok 36 |@b|\n");
+ @b = sort $sortglob 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 37\n" : "not ok 37 |@b|\n");
+ @b = sort $sortname 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 38\n" : "not ok 38 |@b|\n");
+ @b = sort $sortglobr 4,1,3,2;
+ print ("@b" eq '4 3 2 1' ? "ok 39\n" : "not ok 39 |@b|\n");
+}
+
+## exercise sort builtins... ($a <=> $b already tested)
+@a = ( 5, 19, 1996, 255, 90 );
+@b = sort {
+ my $dummy; # force blockness
+ return $b <=> $a
+} @a;
+print ("@b" eq '1996 255 90 19 5' ? "ok 40\n" : "not ok 40\n");
+print "# x = '@b'\n";
+$x = join('', sort { $a cmp $b } @harry);
+$expected = $upperfirst ? 'AbelCaincatdogx' : 'catdogxAbelCain';
+print ($x eq $expected ? "ok 41\n" : "not ok 41\n");
+print "# x = '$x'; expected = '$expected'\n";
+$x = join('', sort { $b cmp $a } @harry);
+$expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+print ($x eq $expected ? "ok 42\n" : "not ok 42\n");
+print "# x = '$x'; expected = '$expected'\n";
+{
+ use integer;
+ @b = sort { $a <=> $b } @a;
+ print ("@b" eq '5 19 90 255 1996' ? "ok 43\n" : "not ok 43\n");
+ print "# x = '@b'\n";
+ @b = sort { $b <=> $a } @a;
+ print ("@b" eq '1996 255 90 19 5' ? "ok 44\n" : "not ok 44\n");
+ print "# x = '@b'\n";
+ $x = join('', sort { $a cmp $b } @harry);
+ $expected = $upperfirst ? 'AbelCaincatdogx' : 'catdogxAbelCain';
+ print ($x eq $expected ? "ok 45\n" : "not ok 45\n");
+ print "# x = '$x'; expected = '$expected'\n";
+ $x = join('', sort { $b cmp $a } @harry);
+ $expected = $upperfirst ? 'xdogcatCainAbel' : 'CainAbelxdogcat';
+ print ($x eq $expected ? "ok 46\n" : "not ok 46\n");
+ print "# x = '$x'; expected = '$expected'\n";
+}
+
+# test that an optimized-away comparison block doesn't take any other
+# arguments away with it
+$x = join('', sort { $a <=> $b } 3, 1, 2);
+print $x eq "123" ? "ok 47\n" : "not ok 47\n";
+
+# test sorting in non-main package
+package Foo;
+@a = ( 5, 19, 1996, 255, 90 );
+@b = sort { $b <=> $a } @a;
+print ("@b" eq '1996 255 90 19 5' ? "ok 48\n" : "not ok 48\n");
+print "# x = '@b'\n";
+
+@b = sort main::Backwards_stacked @a;
+print ("@b" eq '90 5 255 1996 19' ? "ok 49\n" : "not ok 49\n");
+print "# x = '@b'\n";
+
+# check if context for sort arguments is handled right
+
+$test = 49;
+sub test_if_list {
+ my $gimme = wantarray;
+ print "not " unless $gimme;
+ ++$test;
+ print "ok $test\n";
+}
+my $m = sub { $a <=> $b };
+
+sub cxt_one { sort $m test_if_list() }
+cxt_one();
+sub cxt_two { sort { $a <=> $b } test_if_list() }
+cxt_two();
+sub cxt_three { sort &test_if_list() }
+cxt_three();
+
+sub test_if_scalar {
+ my $gimme = wantarray;
+ print "not " if $gimme or !defined($gimme);
+ ++$test;
+ print "ok $test\n";
+}
+
+$m = \&test_if_scalar;
+sub cxt_four { sort $m 1,2 }
+@x = cxt_four();
+sub cxt_five { sort { test_if_scalar($a,$b); } 1,2 }
+@x = cxt_five();
+sub cxt_six { sort test_if_scalar 1,2 }
+@x = cxt_six();
+
+# test against a reentrancy bug
+{
+ package Bar;
+ sub compare { $a cmp $b }
+ sub reenter { my @force = sort compare qw/a b/ }
+}
+{
+ my($def, $init) = (0, 0);
+ @b = sort {
+ $def = 1 if defined $Bar::a;
+ Bar::reenter() unless $init++;
+ $a <=> $b
+ } qw/4 3 1 2/;
+ print ("@b" eq '1 2 3 4' ? "ok 56\n" : "not ok 56\n");
+ print "# x = '@b'\n";
+ print !$def ? "ok 57\n" : "not ok 57\n";
+}
https://perl5.git.perl.org / perl5.git / blobdiff