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-rwxr-xr-xt/pragma/overload.t345
1 files changed, 345 insertions, 0 deletions
diff --git a/t/pragma/overload.t b/t/pragma/overload.t
index e69de29bb2..9c897c31dc 100755
--- a/t/pragma/overload.t
+++ b/t/pragma/overload.t
@@ -0,0 +1,345 @@
+#!./perl
+
+BEGIN {
+ chdir 't' if -d 't';
+ @INC = '../lib';
+}
+
+use Config;
+
+package Oscalar;
+use overload (
+ # Anonymous subroutines:
+'+' => sub {new Oscalar $ {$_[0]}+$_[1]},
+'-' => sub {new Oscalar
+ $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
+'<=>' => sub {new Oscalar
+ $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
+'cmp' => sub {new Oscalar
+ $_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])},
+'*' => sub {new Oscalar ${$_[0]}*$_[1]},
+'/' => sub {new Oscalar
+ $_[2]? $_[1]/${$_[0]} :
+ ${$_[0]}/$_[1]},
+'%' => sub {new Oscalar
+ $_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]},
+'**' => sub {new Oscalar
+ $_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]},
+
+qw(
+"" stringify
+0+ numify) # Order of arguments unsignificant
+);
+
+sub new {
+ my $foo = $_[1];
+ bless \$foo, $_[0];
+}
+
+sub stringify { "${$_[0]}" }
+sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead
+ # comparing to direct compilation based on
+ # stringify
+
+package main;
+
+$test = 0;
+$| = 1;
+print "1..",&last,"\n";
+
+sub test {
+ $test++; if (shift) {print "ok $test\n";1} else {print "not ok $test\n";0}
+}
+
+$a = new Oscalar "087";
+$b= "$a";
+
+# All test numbers in comments are off by 1.
+# So much for hard-wiring them in :-) To fix this:
+test(1); # 1
+
+test ($b eq $a); # 2
+test ($b eq "087"); # 3
+test (ref $a eq "Oscalar"); # 4
+test ($a eq $a); # 5
+test ($a eq "087"); # 6
+
+$c = $a + 7;
+
+test (ref $c eq "Oscalar"); # 7
+test (!($c eq $a)); # 8
+test ($c eq "94"); # 9
+
+$b=$a;
+
+test (ref $a eq "Oscalar"); # 10
+
+$b++;
+
+test (ref $b eq "Oscalar"); # 11
+test ( $a eq "087"); # 12
+test ( $b eq "88"); # 13
+test (ref $a eq "Oscalar"); # 14
+
+$c=$b;
+$c-=$a;
+
+test (ref $c eq "Oscalar"); # 15
+test ( $a eq "087"); # 16
+test ( $c eq "1"); # 17
+test (ref $a eq "Oscalar"); # 18
+
+$b=1;
+$b+=$a;
+
+test (ref $b eq "Oscalar"); # 19
+test ( $a eq "087"); # 20
+test ( $b eq "88"); # 21
+test (ref $a eq "Oscalar"); # 22
+
+eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ];
+
+$b=$a;
+
+test (ref $a eq "Oscalar"); # 23
+
+$b++;
+
+test (ref $b eq "Oscalar"); # 24
+test ( $a eq "087"); # 25
+test ( $b eq "88"); # 26
+test (ref $a eq "Oscalar"); # 27
+
+package Oscalar;
+$dummy=bless \$dummy; # Now cache of method should be reloaded
+package main;
+
+$b=$a;
+$b++;
+
+test (ref $b eq "Oscalar"); # 28
+test ( $a eq "087"); # 29
+test ( $b eq "88"); # 30
+test (ref $a eq "Oscalar"); # 31
+
+
+eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ];
+
+$b=$a;
+
+test (ref $a eq "Oscalar"); # 32
+
+$b++;
+
+test (ref $b eq "Oscalar"); # 33
+test ( $a eq "087"); # 34
+test ( $b eq "88"); # 35
+test (ref $a eq "Oscalar"); # 36
+
+package Oscalar;
+$dummy=bless \$dummy; # Now cache of method should be reloaded
+package main;
+
+$b++;
+
+test (ref $b eq "Oscalar"); # 37
+test ( $a eq "087"); # 38
+test ( $b eq "90"); # 39
+test (ref $a eq "Oscalar"); # 40
+
+$b=$a;
+$b++;
+
+test (ref $b eq "Oscalar"); # 41
+test ( $a eq "087"); # 42
+test ( $b eq "89"); # 43
+test (ref $a eq "Oscalar"); # 44
+
+
+test ($b? 1:0); # 45
+
+eval q[ package Oscalar; use overload ('=' => sub {$main::copies++;
+ package Oscalar;
+ local $new=$ {$_[0]};
+ bless \$new } ) ];
+
+$b=new Oscalar "$a";
+
+test (ref $b eq "Oscalar"); # 46
+test ( $a eq "087"); # 47
+test ( $b eq "087"); # 48
+test (ref $a eq "Oscalar"); # 49
+
+$b++;
+
+test (ref $b eq "Oscalar"); # 50
+test ( $a eq "087"); # 51
+test ( $b eq "89"); # 52
+test (ref $a eq "Oscalar"); # 53
+test ($copies == 0); # 54
+
+$b+=1;
+
+test (ref $b eq "Oscalar"); # 55
+test ( $a eq "087"); # 56
+test ( $b eq "90"); # 57
+test (ref $a eq "Oscalar"); # 58
+test ($copies == 0); # 59
+
+$b=$a;
+$b+=1;
+
+test (ref $b eq "Oscalar"); # 60
+test ( $a eq "087"); # 61
+test ( $b eq "88"); # 62
+test (ref $a eq "Oscalar"); # 63
+test ($copies == 0); # 64
+
+$b=$a;
+$b++;
+
+test (ref $b eq "Oscalar") || print ref $b,"=ref(b)\n"; # 65
+test ( $a eq "087"); # 66
+test ( $b eq "89"); # 67
+test (ref $a eq "Oscalar"); # 68
+test ($copies == 1); # 69
+
+eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
+ $_[0] } ) ];
+$c=new Oscalar; # Cause rehash
+
+$b=$a;
+$b+=1;
+
+test (ref $b eq "Oscalar"); # 70
+test ( $a eq "087"); # 71
+test ( $b eq "90"); # 72
+test (ref $a eq "Oscalar"); # 73
+test ($copies == 2); # 74
+
+$b+=$b;
+
+test (ref $b eq "Oscalar"); # 75
+test ( $b eq "360"); # 76
+test ($copies == 2); # 77
+$b=-$b;
+
+test (ref $b eq "Oscalar"); # 78
+test ( $b eq "-360"); # 79
+test ($copies == 2); # 80
+
+$b=abs($b);
+
+test (ref $b eq "Oscalar"); # 81
+test ( $b eq "360"); # 82
+test ($copies == 2); # 83
+
+$b=abs($b);
+
+test (ref $b eq "Oscalar"); # 84
+test ( $b eq "360"); # 85
+test ($copies == 2); # 86
+
+eval q[package Oscalar;
+ use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]}
+ : "_.${$_[0]}._" x $_[1])}) ];
+
+$a=new Oscalar "yy";
+$a x= 3;
+test ($a eq "_.yy.__.yy.__.yy._"); # 87
+
+eval q[package Oscalar;
+ use overload ('.' => sub {new Oscalar ( $_[2] ?
+ "_.$_[1].__.$ {$_[0]}._"
+ : "_.$ {$_[0]}.__.$_[1]._")}) ];
+
+$a=new Oscalar "xx";
+
+test ("b${a}c" eq "_._.b.__.xx._.__.c._"); # 88
+
+# Check inheritance of overloading;
+{
+ package OscalarI;
+ @ISA = 'Oscalar';
+}
+
+$aI = new OscalarI "$a";
+test (ref $aI eq "OscalarI"); # 89
+test ("$aI" eq "xx"); # 90
+test ($aI eq "xx"); # 91
+test ("b${aI}c" eq "_._.b.__.xx._.__.c._"); # 92
+
+# Here we test blessing to a package updates hash
+
+eval "package Oscalar; no overload '.'";
+
+test ("b${a}" eq "_.b.__.xx._"); # 93
+$x="1";
+bless \$x, Oscalar;
+test ("b${a}c" eq "bxxc"); # 94
+new Oscalar 1;
+test ("b${a}c" eq "bxxc"); # 95
+
+# Negative overloading:
+
+$na = eval { ~$a };
+test($@ =~ /no method found/); # 96
+
+# Check AUTOLOADING:
+
+*Oscalar::AUTOLOAD =
+ sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
+ goto &{"Oscalar::$AUTOLOAD"}};
+
+eval "package Oscalar; use overload '~' => 'comple'";
+
+$na = eval { ~$a }; # Hash was not updated
+test($@ =~ /no method found/); # 97
+
+bless \$x, Oscalar;
+
+$na = eval { ~$a }; # Hash updated
+test !$@; # 98
+test($na eq '_!_xx_!_'); # 99
+
+$na = 0;
+
+$na = eval { ~$aI }; # Hash was not updated
+test($@ =~ /no method found/); # 100
+
+bless \$x, OscalarI;
+
+$na = eval { ~$aI };
+print $@;
+
+test !$@; # 101
+test($na eq '_!_xx_!_'); # 102
+
+eval "package Oscalar; use overload '>>' => 'rshft'";
+
+$na = eval { $aI >> 1 }; # Hash was not updated
+test($@ =~ /no method found/); # 103
+
+bless \$x, OscalarI;
+
+$na = 0;
+
+$na = eval { $aI >> 1 };
+print $@;
+
+test !$@; # 104
+test($na eq '_!_xx_!_'); # 105
+
+test (overload::Method($a, '0+') eq \&Oscalar::numify); # 106
+test (overload::Method($aI,'0+') eq \&Oscalar::numify); # 107
+test (overload::Overloaded($aI)); # 108
+test (!overload::Overloaded('overload')); # 109
+
+test (! defined overload::Method($aI, '<<')); # 110
+test (! defined overload::Method($a, '<')); # 111
+
+test (overload::StrVal($aI) =~ /^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); # 112
+test (overload::StrVal(\$aI) eq "@{[\$aI]}"); # 113
+
+# Last test is:
+sub last {113}
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