| 1 | #!./perl
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| 2 |
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| 3 | BEGIN {
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| 4 | chdir 't' if -d 't';
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| 5 | @INC = '../lib';
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| 6 | require Config;
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| 7 | if (($Config::Config{'extensions'} !~ m!\bList/Util\b!) ){
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| 8 | print "1..0 # Skip -- Perl configured without List::Util module\n";
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| 9 | exit 0;
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| 10 | }
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| 11 | }
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| 12 |
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| 13 | package Oscalar;
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| 14 | use overload (
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| 15 | # Anonymous subroutines:
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| 16 | '+' => sub {new Oscalar $ {$_[0]}+$_[1]},
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| 17 | '-' => sub {new Oscalar
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| 18 | $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
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| 19 | '<=>' => sub {new Oscalar
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| 20 | $_[2]? $_[1]-${$_[0]} : ${$_[0]}-$_[1]},
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| 21 | 'cmp' => sub {new Oscalar
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| 22 | $_[2]? ($_[1] cmp ${$_[0]}) : (${$_[0]} cmp $_[1])},
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| 23 | '*' => sub {new Oscalar ${$_[0]}*$_[1]},
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| 24 | '/' => sub {new Oscalar
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| 25 | $_[2]? $_[1]/${$_[0]} :
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| 26 | ${$_[0]}/$_[1]},
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| 27 | '%' => sub {new Oscalar
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| 28 | $_[2]? $_[1]%${$_[0]} : ${$_[0]}%$_[1]},
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| 29 | '**' => sub {new Oscalar
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| 30 | $_[2]? $_[1]**${$_[0]} : ${$_[0]}-$_[1]},
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| 31 |
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| 32 | qw(
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| 33 | "" stringify
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| 34 | 0+ numify) # Order of arguments unsignificant
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| 35 | );
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| 36 |
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| 37 | sub new {
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| 38 | my $foo = $_[1];
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| 39 | bless \$foo, $_[0];
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| 40 | }
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| 41 |
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| 42 | sub stringify { "${$_[0]}" }
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| 43 | sub numify { 0 + "${$_[0]}" } # Not needed, additional overhead
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| 44 | # comparing to direct compilation based on
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| 45 | # stringify
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| 46 |
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| 47 | package main;
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| 48 |
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| 49 | our $test = 0;
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| 50 | $| = 1;
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| 51 | print "1..",&last,"\n";
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| 52 |
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| 53 | sub test {
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| 54 | $test++;
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| 55 | if (@_ > 1) {
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| 56 | my $comment = "";
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| 57 | $comment = " # " . $_ [2] if @_ > 2;
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| 58 | if ($_[0] eq $_[1]) {
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| 59 | print "ok $test$comment\n";
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| 60 | return 1;
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| 61 | } else {
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| 62 | $comment .= ": '$_[0]' ne '$_[1]'";
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| 63 | print "not ok $test$comment\n";
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| 64 | return 0;
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| 65 | }
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| 66 | } else {
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| 67 | if (shift) {
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| 68 | print "ok $test\n";
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| 69 | return 1;
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| 70 | } else {
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| 71 | print "not ok $test\n";
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| 72 | return 0;
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| 73 | }
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | $a = new Oscalar "087";
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| 78 | $b= "$a";
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| 79 |
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| 80 | # All test numbers in comments are off by 1.
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| 81 | # So much for hard-wiring them in :-) To fix this:
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| 82 | test(1); # 1
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| 83 |
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| 84 | test ($b eq $a); # 2
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| 85 | test ($b eq "087"); # 3
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| 86 | test (ref $a eq "Oscalar"); # 4
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| 87 | test ($a eq $a); # 5
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| 88 | test ($a eq "087"); # 6
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| 89 |
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| 90 | $c = $a + 7;
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| 91 |
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| 92 | test (ref $c eq "Oscalar"); # 7
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| 93 | test (!($c eq $a)); # 8
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| 94 | test ($c eq "94"); # 9
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| 95 |
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| 96 | $b=$a;
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| 97 |
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| 98 | test (ref $a eq "Oscalar"); # 10
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| 99 |
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| 100 | $b++;
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| 101 |
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| 102 | test (ref $b eq "Oscalar"); # 11
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| 103 | test ( $a eq "087"); # 12
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| 104 | test ( $b eq "88"); # 13
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| 105 | test (ref $a eq "Oscalar"); # 14
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| 106 |
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| 107 | $c=$b;
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| 108 | $c-=$a;
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| 109 |
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| 110 | test (ref $c eq "Oscalar"); # 15
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| 111 | test ( $a eq "087"); # 16
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| 112 | test ( $c eq "1"); # 17
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| 113 | test (ref $a eq "Oscalar"); # 18
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| 114 |
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| 115 | $b=1;
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| 116 | $b+=$a;
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| 117 |
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| 118 | test (ref $b eq "Oscalar"); # 19
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| 119 | test ( $a eq "087"); # 20
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| 120 | test ( $b eq "88"); # 21
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| 121 | test (ref $a eq "Oscalar"); # 22
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| 122 |
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| 123 | eval q[ package Oscalar; use overload ('++' => sub { $ {$_[0]}++;$_[0] } ) ];
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| 124 |
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| 125 | $b=$a;
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| 126 |
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| 127 | test (ref $a eq "Oscalar"); # 23
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| 128 |
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| 129 | $b++;
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| 130 |
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| 131 | test (ref $b eq "Oscalar"); # 24
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| 132 | test ( $a eq "087"); # 25
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| 133 | test ( $b eq "88"); # 26
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| 134 | test (ref $a eq "Oscalar"); # 27
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| 135 |
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| 136 | package Oscalar;
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| 137 | $dummy=bless \$dummy; # Now cache of method should be reloaded
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| 138 | package main;
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| 139 |
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| 140 | $b=$a;
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| 141 | $b++;
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| 142 |
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| 143 | test (ref $b eq "Oscalar"); # 28
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| 144 | test ( $a eq "087"); # 29
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| 145 | test ( $b eq "88"); # 30
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| 146 | test (ref $a eq "Oscalar"); # 31
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| 147 |
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| 148 | undef $b; # Destroying updates tables too...
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| 149 |
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| 150 | eval q[package Oscalar; use overload ('++' => sub { $ {$_[0]} += 2; $_[0] } ) ];
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| 151 |
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| 152 | $b=$a;
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| 153 |
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| 154 | test (ref $a eq "Oscalar"); # 32
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| 155 |
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| 156 | $b++;
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| 157 |
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| 158 | test (ref $b eq "Oscalar"); # 33
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| 159 | test ( $a eq "087"); # 34
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| 160 | test ( $b eq "88"); # 35
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| 161 | test (ref $a eq "Oscalar"); # 36
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| 162 |
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| 163 | package Oscalar;
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| 164 | $dummy=bless \$dummy; # Now cache of method should be reloaded
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| 165 | package main;
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| 166 |
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| 167 | $b++;
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| 168 |
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| 169 | test (ref $b eq "Oscalar"); # 37
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| 170 | test ( $a eq "087"); # 38
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| 171 | test ( $b eq "90"); # 39
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| 172 | test (ref $a eq "Oscalar"); # 40
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| 173 |
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| 174 | $b=$a;
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| 175 | $b++;
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| 176 |
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| 177 | test (ref $b eq "Oscalar"); # 41
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| 178 | test ( $a eq "087"); # 42
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| 179 | test ( $b eq "89"); # 43
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| 180 | test (ref $a eq "Oscalar"); # 44
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| 181 |
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| 182 |
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| 183 | test ($b? 1:0); # 45
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| 184 |
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| 185 | eval q[ package Oscalar; use overload ('=' => sub {$main::copies++;
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| 186 | package Oscalar;
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| 187 | local $new=$ {$_[0]};
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| 188 | bless \$new } ) ];
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| 189 |
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| 190 | $b=new Oscalar "$a";
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| 191 |
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| 192 | test (ref $b eq "Oscalar"); # 46
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| 193 | test ( $a eq "087"); # 47
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| 194 | test ( $b eq "087"); # 48
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| 195 | test (ref $a eq "Oscalar"); # 49
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| 196 |
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| 197 | $b++;
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| 198 |
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| 199 | test (ref $b eq "Oscalar"); # 50
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| 200 | test ( $a eq "087"); # 51
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| 201 | test ( $b eq "89"); # 52
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| 202 | test (ref $a eq "Oscalar"); # 53
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| 203 | test ($copies == 0); # 54
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| 204 |
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| 205 | $b+=1;
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| 206 |
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| 207 | test (ref $b eq "Oscalar"); # 55
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| 208 | test ( $a eq "087"); # 56
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| 209 | test ( $b eq "90"); # 57
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| 210 | test (ref $a eq "Oscalar"); # 58
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| 211 | test ($copies == 0); # 59
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| 212 |
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| 213 | $b=$a;
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| 214 | $b+=1;
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| 215 |
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| 216 | test (ref $b eq "Oscalar"); # 60
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| 217 | test ( $a eq "087"); # 61
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| 218 | test ( $b eq "88"); # 62
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| 219 | test (ref $a eq "Oscalar"); # 63
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| 220 | test ($copies == 0); # 64
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| 221 |
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| 222 | $b=$a;
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| 223 | $b++;
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| 224 |
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| 225 | test (ref $b eq "Oscalar") || print ref $b,"=ref(b)\n"; # 65
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| 226 | test ( $a eq "087"); # 66
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| 227 | test ( $b eq "89"); # 67
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| 228 | test (ref $a eq "Oscalar"); # 68
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| 229 | test ($copies == 1); # 69
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| 230 |
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| 231 | eval q[package Oscalar; use overload ('+=' => sub {$ {$_[0]} += 3*$_[1];
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| 232 | $_[0] } ) ];
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| 233 | $c=new Oscalar; # Cause rehash
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| 234 |
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| 235 | $b=$a;
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| 236 | $b+=1;
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| 237 |
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| 238 | test (ref $b eq "Oscalar"); # 70
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| 239 | test ( $a eq "087"); # 71
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| 240 | test ( $b eq "90"); # 72
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| 241 | test (ref $a eq "Oscalar"); # 73
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| 242 | test ($copies == 2); # 74
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| 243 |
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| 244 | $b+=$b;
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| 245 |
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| 246 | test (ref $b eq "Oscalar"); # 75
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| 247 | test ( $b eq "360"); # 76
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| 248 | test ($copies == 2); # 77
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| 249 | $b=-$b;
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| 250 |
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| 251 | test (ref $b eq "Oscalar"); # 78
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| 252 | test ( $b eq "-360"); # 79
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| 253 | test ($copies == 2); # 80
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| 254 |
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| 255 | $b=abs($b);
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| 256 |
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| 257 | test (ref $b eq "Oscalar"); # 81
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| 258 | test ( $b eq "360"); # 82
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| 259 | test ($copies == 2); # 83
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| 260 |
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| 261 | $b=abs($b);
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| 262 |
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| 263 | test (ref $b eq "Oscalar"); # 84
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| 264 | test ( $b eq "360"); # 85
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| 265 | test ($copies == 2); # 86
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| 266 |
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| 267 | eval q[package Oscalar;
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| 268 | use overload ('x' => sub {new Oscalar ( $_[2] ? "_.$_[1]._" x $ {$_[0]}
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| 269 | : "_.${$_[0]}._" x $_[1])}) ];
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| 270 |
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| 271 | $a=new Oscalar "yy";
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| 272 | $a x= 3;
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| 273 | test ($a eq "_.yy.__.yy.__.yy._"); # 87
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| 274 |
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| 275 | eval q[package Oscalar;
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| 276 | use overload ('.' => sub {new Oscalar ( $_[2] ?
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| 277 | "_.$_[1].__.$ {$_[0]}._"
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| 278 | : "_.$ {$_[0]}.__.$_[1]._")}) ];
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| 279 |
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| 280 | $a=new Oscalar "xx";
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| 281 |
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| 282 | test ("b${a}c" eq "_._.b.__.xx._.__.c._"); # 88
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| 283 |
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| 284 | # Check inheritance of overloading;
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| 285 | {
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| 286 | package OscalarI;
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| 287 | @ISA = 'Oscalar';
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| 288 | }
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| 289 |
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| 290 | $aI = new OscalarI "$a";
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| 291 | test (ref $aI eq "OscalarI"); # 89
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| 292 | test ("$aI" eq "xx"); # 90
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| 293 | test ($aI eq "xx"); # 91
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| 294 | test ("b${aI}c" eq "_._.b.__.xx._.__.c._"); # 92
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| 295 |
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| 296 | # Here we test blessing to a package updates hash
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| 297 |
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| 298 | eval "package Oscalar; no overload '.'";
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| 299 |
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| 300 | test ("b${a}" eq "_.b.__.xx._"); # 93
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| 301 | $x="1";
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| 302 | bless \$x, Oscalar;
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| 303 | test ("b${a}c" eq "bxxc"); # 94
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| 304 | new Oscalar 1;
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| 305 | test ("b${a}c" eq "bxxc"); # 95
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| 306 |
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| 307 | # Negative overloading:
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| 308 |
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| 309 | $na = eval { ~$a };
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| 310 | test($@ =~ /no method found/); # 96
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| 311 |
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| 312 | # Check AUTOLOADING:
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| 313 |
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| 314 | *Oscalar::AUTOLOAD =
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| 315 | sub { *{"Oscalar::$AUTOLOAD"} = sub {"_!_" . shift() . "_!_"} ;
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| 316 | goto &{"Oscalar::$AUTOLOAD"}};
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| 317 |
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| 318 | eval "package Oscalar; sub comple; use overload '~' => 'comple'";
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| 319 |
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| 320 | $na = eval { ~$a }; # Hash was not updated
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| 321 | test($@ =~ /no method found/); # 97
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| 322 |
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| 323 | bless \$x, Oscalar;
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| 324 |
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| 325 | $na = eval { ~$a }; # Hash updated
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| 326 | warn "`$na', $@" if $@;
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| 327 | test !$@; # 98
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| 328 | test($na eq '_!_xx_!_'); # 99
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| 329 |
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| 330 | $na = 0;
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| 331 |
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| 332 | $na = eval { ~$aI }; # Hash was not updated
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| 333 | test($@ =~ /no method found/); # 100
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| 334 |
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| 335 | bless \$x, OscalarI;
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| 336 |
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| 337 | $na = eval { ~$aI };
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| 338 | print $@;
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| 339 |
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| 340 | test !$@; # 101
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| 341 | test($na eq '_!_xx_!_'); # 102
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| 342 |
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| 343 | eval "package Oscalar; sub rshft; use overload '>>' => 'rshft'";
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| 344 |
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| 345 | $na = eval { $aI >> 1 }; # Hash was not updated
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| 346 | test($@ =~ /no method found/); # 103
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| 347 |
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| 348 | bless \$x, OscalarI;
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| 349 |
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| 350 | $na = 0;
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| 351 |
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| 352 | $na = eval { $aI >> 1 };
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| 353 | print $@;
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| 354 |
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| 355 | test !$@; # 104
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| 356 | test($na eq '_!_xx_!_'); # 105
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| 357 |
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| 358 | # warn overload::Method($a, '0+'), "\n";
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| 359 | test (overload::Method($a, '0+') eq \&Oscalar::numify); # 106
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| 360 | test (overload::Method($aI,'0+') eq \&Oscalar::numify); # 107
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| 361 | test (overload::Overloaded($aI)); # 108
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| 362 | test (!overload::Overloaded('overload')); # 109
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| 363 |
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| 364 | test (! defined overload::Method($aI, '<<')); # 110
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| 365 | test (! defined overload::Method($a, '<')); # 111
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| 366 |
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| 367 | test (overload::StrVal($aI) =~ /^OscalarI=SCALAR\(0x[\da-fA-F]+\)$/); # 112
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| 368 | test (overload::StrVal(\$aI) eq "@{[\$aI]}"); # 113
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| 369 |
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| 370 | # Check overloading by methods (specified deep in the ISA tree).
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| 371 | {
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| 372 | package OscalarII;
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| 373 | @ISA = 'OscalarI';
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| 374 | sub Oscalar::lshft {"_<<_" . shift() . "_<<_"}
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| 375 | eval "package OscalarI; use overload '<<' => 'lshft', '|' => 'lshft'";
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| 376 | }
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| 377 |
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| 378 | $aaII = "087";
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| 379 | $aII = \$aaII;
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| 380 | bless $aII, 'OscalarII';
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| 381 | bless \$fake, 'OscalarI'; # update the hash
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| 382 | test(($aI | 3) eq '_<<_xx_<<_'); # 114
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| 383 | # warn $aII << 3;
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| 384 | test(($aII << 3) eq '_<<_087_<<_'); # 115
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| 385 |
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| 386 | {
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| 387 | BEGIN { $int = 7; overload::constant 'integer' => sub {$int++; shift}; }
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| 388 | $out = 2**10;
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| 389 | }
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| 390 | test($int, 9); # 116
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| 391 | test($out, 1024); # 117
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| 392 |
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| 393 | $foo = 'foo';
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| 394 | $foo1 = 'f\'o\\o';
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| 395 | {
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| 396 | BEGIN { $q = $qr = 7;
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| 397 | overload::constant 'q' => sub {$q++; push @q, shift, ($_[1] || 'none'); shift},
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| 398 | 'qr' => sub {$qr++; push @qr, shift, ($_[1] || 'none'); shift}; }
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| 399 | $out = 'foo';
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| 400 | $out1 = 'f\'o\\o';
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| 401 | $out2 = "a\a$foo,\,";
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| 402 | /b\b$foo.\./;
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| 403 | }
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| 404 |
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| 405 | test($out, 'foo'); # 118
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| 406 | test($out, $foo); # 119
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| 407 | test($out1, 'f\'o\\o'); # 120
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| 408 | test($out1, $foo1); # 121
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| 409 | test($out2, "a\afoo,\,"); # 122
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| 410 | test("@q", "foo q f'o\\\\o q a\\a qq ,\\, qq"); # 123
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| 411 | test($q, 11); # 124
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| 412 | test("@qr", "b\\b qq .\\. qq"); # 125
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| 413 | test($qr, 9); # 126
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| 414 |
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| 415 | {
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| 416 | $_ = '!<b>!foo!<-.>!';
|
|---|
| 417 | BEGIN { overload::constant 'q' => sub {push @q1, shift, ($_[1] || 'none'); "_<" . (shift) . ">_"},
|
|---|
| 418 | 'qr' => sub {push @qr1, shift, ($_[1] || 'none'); "!<" . (shift) . ">!"}; }
|
|---|
| 419 | $out = 'foo';
|
|---|
| 420 | $out1 = 'f\'o\\o';
|
|---|
| 421 | $out2 = "a\a$foo,\,";
|
|---|
| 422 | $res = /b\b$foo.\./;
|
|---|
| 423 | $a = <<EOF;
|
|---|
| 424 | oups
|
|---|
| 425 | EOF
|
|---|
| 426 | $b = <<'EOF';
|
|---|
| 427 | oups1
|
|---|
| 428 | EOF
|
|---|
| 429 | $c = bareword;
|
|---|
| 430 | m'try it';
|
|---|
| 431 | s'first part'second part';
|
|---|
| 432 | s/yet another/tail here/;
|
|---|
| 433 | tr/A-Z/a-z/;
|
|---|
| 434 | }
|
|---|
| 435 |
|
|---|
| 436 | test($out, '_<foo>_'); # 117
|
|---|
| 437 | test($out1, '_<f\'o\\o>_'); # 128
|
|---|
| 438 | test($out2, "_<a\a>_foo_<,\,>_"); # 129
|
|---|
| 439 | test("@q1", "foo q f'o\\\\o q a\\a qq ,\\, qq oups
|
|---|
| 440 | qq oups1
|
|---|
| 441 | q second part q tail here s A-Z tr a-z tr"); # 130
|
|---|
| 442 | test("@qr1", "b\\b qq .\\. qq try it q first part q yet another qq"); # 131
|
|---|
| 443 | test($res, 1); # 132
|
|---|
| 444 | test($a, "_<oups
|
|---|
| 445 | >_"); # 133
|
|---|
| 446 | test($b, "_<oups1
|
|---|
| 447 | >_"); # 134
|
|---|
| 448 | test($c, "bareword"); # 135
|
|---|
| 449 |
|
|---|
| 450 | {
|
|---|
| 451 | package symbolic; # Primitive symbolic calculator
|
|---|
| 452 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num,
|
|---|
| 453 | '=' => \&cpy, '++' => \&inc, '--' => \&dec;
|
|---|
| 454 |
|
|---|
| 455 | sub new { shift; bless ['n', @_] }
|
|---|
| 456 | sub cpy {
|
|---|
| 457 | my $self = shift;
|
|---|
| 458 | bless [@$self], ref $self;
|
|---|
| 459 | }
|
|---|
| 460 | sub inc { $_[0] = bless ['++', $_[0], 1]; }
|
|---|
| 461 | sub dec { $_[0] = bless ['--', $_[0], 1]; }
|
|---|
| 462 | sub wrap {
|
|---|
| 463 | my ($obj, $other, $inv, $meth) = @_;
|
|---|
| 464 | if ($meth eq '++' or $meth eq '--') {
|
|---|
| 465 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
|
|---|
| 466 | return $obj;
|
|---|
| 467 | }
|
|---|
| 468 | ($obj, $other) = ($other, $obj) if $inv;
|
|---|
| 469 | bless [$meth, $obj, $other];
|
|---|
| 470 | }
|
|---|
| 471 | sub str {
|
|---|
| 472 | my ($meth, $a, $b) = @{+shift};
|
|---|
| 473 | $a = 'u' unless defined $a;
|
|---|
| 474 | if (defined $b) {
|
|---|
| 475 | "[$meth $a $b]";
|
|---|
| 476 | } else {
|
|---|
| 477 | "[$meth $a]";
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | my %subr = ( 'n' => sub {$_[0]} );
|
|---|
| 481 | foreach my $op (split " ", $overload::ops{with_assign}) {
|
|---|
| 482 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
|
|---|
| 483 | }
|
|---|
| 484 | my @bins = qw(binary 3way_comparison num_comparison str_comparison);
|
|---|
| 485 | foreach my $op (split " ", "@overload::ops{ @bins }") {
|
|---|
| 486 | $subr{$op} = eval "sub {shift() $op shift()}";
|
|---|
| 487 | }
|
|---|
| 488 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
|
|---|
| 489 | $subr{$op} = eval "sub {$op shift()}";
|
|---|
| 490 | }
|
|---|
| 491 | $subr{'++'} = $subr{'+'};
|
|---|
| 492 | $subr{'--'} = $subr{'-'};
|
|---|
| 493 |
|
|---|
| 494 | sub num {
|
|---|
| 495 | my ($meth, $a, $b) = @{+shift};
|
|---|
| 496 | my $subr = $subr{$meth}
|
|---|
| 497 | or die "Do not know how to ($meth) in symbolic";
|
|---|
| 498 | $a = $a->num if ref $a eq __PACKAGE__;
|
|---|
| 499 | $b = $b->num if ref $b eq __PACKAGE__;
|
|---|
| 500 | $subr->($a,$b);
|
|---|
| 501 | }
|
|---|
| 502 | sub TIESCALAR { my $pack = shift; $pack->new(@_) }
|
|---|
| 503 | sub FETCH { shift }
|
|---|
| 504 | sub nop { } # Around a bug
|
|---|
| 505 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; }
|
|---|
| 506 | sub STORE {
|
|---|
| 507 | my $obj = shift;
|
|---|
| 508 | $#$obj = 1;
|
|---|
| 509 | $obj->[1] = shift;
|
|---|
| 510 | }
|
|---|
| 511 | }
|
|---|
| 512 |
|
|---|
| 513 | {
|
|---|
| 514 | my $foo = new symbolic 11;
|
|---|
| 515 | my $baz = $foo++;
|
|---|
| 516 | test( (sprintf "%d", $foo), '12');
|
|---|
| 517 | test( (sprintf "%d", $baz), '11');
|
|---|
| 518 | my $bar = $foo;
|
|---|
| 519 | $baz = ++$foo;
|
|---|
| 520 | test( (sprintf "%d", $foo), '13');
|
|---|
| 521 | test( (sprintf "%d", $bar), '12');
|
|---|
| 522 | test( (sprintf "%d", $baz), '13');
|
|---|
| 523 | my $ban = $foo;
|
|---|
| 524 | $baz = ($foo += 1);
|
|---|
| 525 | test( (sprintf "%d", $foo), '14');
|
|---|
| 526 | test( (sprintf "%d", $bar), '12');
|
|---|
| 527 | test( (sprintf "%d", $baz), '14');
|
|---|
| 528 | test( (sprintf "%d", $ban), '13');
|
|---|
| 529 | $baz = 0;
|
|---|
| 530 | $baz = $foo++;
|
|---|
| 531 | test( (sprintf "%d", $foo), '15');
|
|---|
| 532 | test( (sprintf "%d", $baz), '14');
|
|---|
| 533 | test( "$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]');
|
|---|
| 534 | }
|
|---|
| 535 |
|
|---|
| 536 | {
|
|---|
| 537 | my $iter = new symbolic 2;
|
|---|
| 538 | my $side = new symbolic 1;
|
|---|
| 539 | my $cnt = $iter;
|
|---|
| 540 |
|
|---|
| 541 | while ($cnt) {
|
|---|
| 542 | $cnt = $cnt - 1; # The "simple" way
|
|---|
| 543 | $side = (sqrt(1 + $side**2) - 1)/$side;
|
|---|
| 544 | }
|
|---|
| 545 | my $pi = $side*(2**($iter+2));
|
|---|
| 546 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]';
|
|---|
| 547 | test( (sprintf "%f", $pi), '3.182598');
|
|---|
| 548 | }
|
|---|
| 549 |
|
|---|
| 550 | {
|
|---|
| 551 | my $iter = new symbolic 2;
|
|---|
| 552 | my $side = new symbolic 1;
|
|---|
| 553 | my $cnt = $iter;
|
|---|
| 554 |
|
|---|
| 555 | while ($cnt--) {
|
|---|
| 556 | $side = (sqrt(1 + $side**2) - 1)/$side;
|
|---|
| 557 | }
|
|---|
| 558 | my $pi = $side*(2**($iter+2));
|
|---|
| 559 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]';
|
|---|
| 560 | test( (sprintf "%f", $pi), '3.182598');
|
|---|
| 561 | }
|
|---|
| 562 |
|
|---|
| 563 | {
|
|---|
| 564 | my ($a, $b);
|
|---|
| 565 | symbolic->vars($a, $b);
|
|---|
| 566 | my $c = sqrt($a**2 + $b**2);
|
|---|
| 567 | $a = 3; $b = 4;
|
|---|
| 568 | test( (sprintf "%d", $c), '5');
|
|---|
| 569 | $a = 12; $b = 5;
|
|---|
| 570 | test( (sprintf "%d", $c), '13');
|
|---|
| 571 | }
|
|---|
| 572 |
|
|---|
| 573 | {
|
|---|
| 574 | package symbolic1; # Primitive symbolic calculator
|
|---|
| 575 | # Mutator inc/dec
|
|---|
| 576 | use overload nomethod => \&wrap, '""' => \&str, '0+' => \&num, '=' => \&cpy;
|
|---|
| 577 |
|
|---|
| 578 | sub new { shift; bless ['n', @_] }
|
|---|
| 579 | sub cpy {
|
|---|
| 580 | my $self = shift;
|
|---|
| 581 | bless [@$self], ref $self;
|
|---|
| 582 | }
|
|---|
| 583 | sub wrap {
|
|---|
| 584 | my ($obj, $other, $inv, $meth) = @_;
|
|---|
| 585 | if ($meth eq '++' or $meth eq '--') {
|
|---|
| 586 | @$obj = ($meth, (bless [@$obj]), 1); # Avoid circular reference
|
|---|
| 587 | return $obj;
|
|---|
| 588 | }
|
|---|
| 589 | ($obj, $other) = ($other, $obj) if $inv;
|
|---|
| 590 | bless [$meth, $obj, $other];
|
|---|
| 591 | }
|
|---|
| 592 | sub str {
|
|---|
| 593 | my ($meth, $a, $b) = @{+shift};
|
|---|
| 594 | $a = 'u' unless defined $a;
|
|---|
| 595 | if (defined $b) {
|
|---|
| 596 | "[$meth $a $b]";
|
|---|
| 597 | } else {
|
|---|
| 598 | "[$meth $a]";
|
|---|
| 599 | }
|
|---|
| 600 | }
|
|---|
| 601 | my %subr = ( 'n' => sub {$_[0]} );
|
|---|
| 602 | foreach my $op (split " ", $overload::ops{with_assign}) {
|
|---|
| 603 | $subr{$op} = $subr{"$op="} = eval "sub {shift() $op shift()}";
|
|---|
| 604 | }
|
|---|
| 605 | my @bins = qw(binary 3way_comparison num_comparison str_comparison);
|
|---|
| 606 | foreach my $op (split " ", "@overload::ops{ @bins }") {
|
|---|
| 607 | $subr{$op} = eval "sub {shift() $op shift()}";
|
|---|
| 608 | }
|
|---|
| 609 | foreach my $op (split " ", "@overload::ops{qw(unary func)}") {
|
|---|
| 610 | $subr{$op} = eval "sub {$op shift()}";
|
|---|
| 611 | }
|
|---|
| 612 | $subr{'++'} = $subr{'+'};
|
|---|
| 613 | $subr{'--'} = $subr{'-'};
|
|---|
| 614 |
|
|---|
| 615 | sub num {
|
|---|
| 616 | my ($meth, $a, $b) = @{+shift};
|
|---|
| 617 | my $subr = $subr{$meth}
|
|---|
| 618 | or die "Do not know how to ($meth) in symbolic";
|
|---|
| 619 | $a = $a->num if ref $a eq __PACKAGE__;
|
|---|
| 620 | $b = $b->num if ref $b eq __PACKAGE__;
|
|---|
| 621 | $subr->($a,$b);
|
|---|
| 622 | }
|
|---|
| 623 | sub TIESCALAR { my $pack = shift; $pack->new(@_) }
|
|---|
| 624 | sub FETCH { shift }
|
|---|
| 625 | sub nop { } # Around a bug
|
|---|
| 626 | sub vars { my $p = shift; tie($_, $p), $_->nop foreach @_; }
|
|---|
| 627 | sub STORE {
|
|---|
| 628 | my $obj = shift;
|
|---|
| 629 | $#$obj = 1;
|
|---|
| 630 | $obj->[1] = shift;
|
|---|
| 631 | }
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 | {
|
|---|
| 635 | my $foo = new symbolic1 11;
|
|---|
| 636 | my $baz = $foo++;
|
|---|
| 637 | test( (sprintf "%d", $foo), '12');
|
|---|
| 638 | test( (sprintf "%d", $baz), '11');
|
|---|
| 639 | my $bar = $foo;
|
|---|
| 640 | $baz = ++$foo;
|
|---|
| 641 | test( (sprintf "%d", $foo), '13');
|
|---|
| 642 | test( (sprintf "%d", $bar), '12');
|
|---|
| 643 | test( (sprintf "%d", $baz), '13');
|
|---|
| 644 | my $ban = $foo;
|
|---|
| 645 | $baz = ($foo += 1);
|
|---|
| 646 | test( (sprintf "%d", $foo), '14');
|
|---|
| 647 | test( (sprintf "%d", $bar), '12');
|
|---|
| 648 | test( (sprintf "%d", $baz), '14');
|
|---|
| 649 | test( (sprintf "%d", $ban), '13');
|
|---|
| 650 | $baz = 0;
|
|---|
| 651 | $baz = $foo++;
|
|---|
| 652 | test( (sprintf "%d", $foo), '15');
|
|---|
| 653 | test( (sprintf "%d", $baz), '14');
|
|---|
| 654 | test( "$foo", '[++ [+= [++ [++ [n 11] 1] 1] 1] 1]');
|
|---|
| 655 | }
|
|---|
| 656 |
|
|---|
| 657 | {
|
|---|
| 658 | my $iter = new symbolic1 2;
|
|---|
| 659 | my $side = new symbolic1 1;
|
|---|
| 660 | my $cnt = $iter;
|
|---|
| 661 |
|
|---|
| 662 | while ($cnt) {
|
|---|
| 663 | $cnt = $cnt - 1; # The "simple" way
|
|---|
| 664 | $side = (sqrt(1 + $side**2) - 1)/$side;
|
|---|
| 665 | }
|
|---|
| 666 | my $pi = $side*(2**($iter+2));
|
|---|
| 667 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]';
|
|---|
| 668 | test( (sprintf "%f", $pi), '3.182598');
|
|---|
| 669 | }
|
|---|
| 670 |
|
|---|
| 671 | {
|
|---|
| 672 | my $iter = new symbolic1 2;
|
|---|
| 673 | my $side = new symbolic1 1;
|
|---|
| 674 | my $cnt = $iter;
|
|---|
| 675 |
|
|---|
| 676 | while ($cnt--) {
|
|---|
| 677 | $side = (sqrt(1 + $side**2) - 1)/$side;
|
|---|
| 678 | }
|
|---|
| 679 | my $pi = $side*(2**($iter+2));
|
|---|
| 680 | test "$side", '[/ [- [sqrt [+ 1 [** [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]] 2]]] 1] [/ [- [sqrt [+ 1 [** [n 1] 2]]] 1] [n 1]]]';
|
|---|
| 681 | test( (sprintf "%f", $pi), '3.182598');
|
|---|
| 682 | }
|
|---|
| 683 |
|
|---|
| 684 | {
|
|---|
| 685 | my ($a, $b);
|
|---|
| 686 | symbolic1->vars($a, $b);
|
|---|
| 687 | my $c = sqrt($a**2 + $b**2);
|
|---|
| 688 | $a = 3; $b = 4;
|
|---|
| 689 | test( (sprintf "%d", $c), '5');
|
|---|
| 690 | $a = 12; $b = 5;
|
|---|
| 691 | test( (sprintf "%d", $c), '13');
|
|---|
| 692 | }
|
|---|
| 693 |
|
|---|
| 694 | {
|
|---|
| 695 | package two_face; # Scalars with separate string and
|
|---|
| 696 | # numeric values.
|
|---|
| 697 | sub new { my $p = shift; bless [@_], $p }
|
|---|
| 698 | use overload '""' => \&str, '0+' => \&num, fallback => 1;
|
|---|
| 699 | sub num {shift->[1]}
|
|---|
| 700 | sub str {shift->[0]}
|
|---|
| 701 | }
|
|---|
| 702 |
|
|---|
| 703 | {
|
|---|
| 704 | my $seven = new two_face ("vii", 7);
|
|---|
| 705 | test( (sprintf "seven=$seven, seven=%d, eight=%d", $seven, $seven+1),
|
|---|
| 706 | 'seven=vii, seven=7, eight=8');
|
|---|
| 707 | test( scalar ($seven =~ /i/), '1')
|
|---|
| 708 | }
|
|---|
| 709 |
|
|---|
| 710 | {
|
|---|
| 711 | package sorting;
|
|---|
| 712 | use overload 'cmp' => \∁
|
|---|
| 713 | sub new { my ($p, $v) = @_; bless \$v, $p }
|
|---|
| 714 | sub comp { my ($x,$y) = @_; ($$x * 3 % 10) <=> ($$y * 3 % 10) or $$x cmp $$y }
|
|---|
| 715 | }
|
|---|
| 716 | {
|
|---|
| 717 | my @arr = map sorting->new($_), 0..12;
|
|---|
| 718 | my @sorted1 = sort @arr;
|
|---|
| 719 | my @sorted2 = map $$_, @sorted1;
|
|---|
| 720 | test "@sorted2", '0 10 7 4 1 11 8 5 12 2 9 6 3';
|
|---|
| 721 | }
|
|---|
| 722 | {
|
|---|
| 723 | package iterator;
|
|---|
| 724 | use overload '<>' => \&iter;
|
|---|
| 725 | sub new { my ($p, $v) = @_; bless \$v, $p }
|
|---|
| 726 | sub iter { my ($x) = @_; return undef if $$x < 0; return $$x--; }
|
|---|
| 727 | }
|
|---|
| 728 |
|
|---|
| 729 | # XXX iterator overload not intended to work with CORE::GLOBAL?
|
|---|
| 730 | if (defined &CORE::GLOBAL::glob) {
|
|---|
| 731 | test '1', '1'; # 175
|
|---|
| 732 | test '1', '1'; # 176
|
|---|
| 733 | test '1', '1'; # 177
|
|---|
| 734 | }
|
|---|
| 735 | else {
|
|---|
| 736 | my $iter = iterator->new(5);
|
|---|
| 737 | my $acc = '';
|
|---|
| 738 | my $out;
|
|---|
| 739 | $acc .= " $out" while $out = <${iter}>;
|
|---|
| 740 | test $acc, ' 5 4 3 2 1 0'; # 175
|
|---|
| 741 | $iter = iterator->new(5);
|
|---|
| 742 | test scalar <${iter}>, '5'; # 176
|
|---|
| 743 | $acc = '';
|
|---|
| 744 | $acc .= " $out" while $out = <$iter>;
|
|---|
| 745 | test $acc, ' 4 3 2 1 0'; # 177
|
|---|
| 746 | }
|
|---|
| 747 | {
|
|---|
| 748 | package deref;
|
|---|
| 749 | use overload '%{}' => \&hderef, '&{}' => \&cderef,
|
|---|
| 750 | '*{}' => \&gderef, '${}' => \&sderef, '@{}' => \&aderef;
|
|---|
| 751 | sub new { my ($p, $v) = @_; bless \$v, $p }
|
|---|
| 752 | sub deref {
|
|---|
| 753 | my ($self, $key) = (shift, shift);
|
|---|
| 754 | my $class = ref $self;
|
|---|
| 755 | bless $self, 'deref::dummy'; # Disable overloading of %{}
|
|---|
| 756 | my $out = $self->{$key};
|
|---|
| 757 | bless $self, $class; # Restore overloading
|
|---|
| 758 | $out;
|
|---|
| 759 | }
|
|---|
| 760 | sub hderef {shift->deref('h')}
|
|---|
| 761 | sub aderef {shift->deref('a')}
|
|---|
| 762 | sub cderef {shift->deref('c')}
|
|---|
| 763 | sub gderef {shift->deref('g')}
|
|---|
| 764 | sub sderef {shift->deref('s')}
|
|---|
| 765 | }
|
|---|
| 766 | {
|
|---|
| 767 | my $deref = bless { h => { foo => 5 , fake => 23 },
|
|---|
| 768 | c => sub {return shift() + 34},
|
|---|
| 769 | 's' => \123,
|
|---|
| 770 | a => [11..13],
|
|---|
| 771 | g => \*srt,
|
|---|
| 772 | }, 'deref';
|
|---|
| 773 | # Hash:
|
|---|
| 774 | my @cont = sort %$deref;
|
|---|
| 775 | if ("\t" eq "\011") { # ascii
|
|---|
| 776 | test "@cont", '23 5 fake foo'; # 178
|
|---|
| 777 | }
|
|---|
| 778 | else { # ebcdic alpha-numeric sort order
|
|---|
| 779 | test "@cont", 'fake foo 23 5'; # 178
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| 780 | }
|
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| 781 | my @keys = sort keys %$deref;
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| 782 | test "@keys", 'fake foo'; # 179
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| 783 | my @val = sort values %$deref;
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|---|
| 784 | test "@val", '23 5'; # 180
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|---|
| 785 | test $deref->{foo}, 5; # 181
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|---|
| 786 | test defined $deref->{bar}, ''; # 182
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|---|
| 787 | my $key;
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|---|
| 788 | @keys = ();
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| 789 | push @keys, $key while $key = each %$deref;
|
|---|
| 790 | @keys = sort @keys;
|
|---|
| 791 | test "@keys", 'fake foo'; # 183
|
|---|
| 792 | test exists $deref->{bar}, ''; # 184
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|---|
| 793 | test exists $deref->{foo}, 1; # 185
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|---|
| 794 | # Code:
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|---|
| 795 | test $deref->(5), 39; # 186
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|---|
| 796 | test &$deref(6), 40; # 187
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|---|
| 797 | sub xxx_goto { goto &$deref }
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|---|
| 798 | test xxx_goto(7), 41; # 188
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|---|
| 799 | my $srt = bless { c => sub {$b <=> $a}
|
|---|
| 800 | }, 'deref';
|
|---|
| 801 | *srt = \&$srt;
|
|---|
| 802 | my @sorted = sort srt 11, 2, 5, 1, 22;
|
|---|
| 803 | test "@sorted", '22 11 5 2 1'; # 189
|
|---|
| 804 | # Scalar
|
|---|
| 805 | test $$deref, 123; # 190
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|---|
| 806 | # Code
|
|---|
| 807 | @sorted = sort $srt 11, 2, 5, 1, 22;
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|---|
| 808 | test "@sorted", '22 11 5 2 1'; # 191
|
|---|
| 809 | # Array
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|---|
| 810 | test "@$deref", '11 12 13'; # 192
|
|---|
| 811 | test $#$deref, '2'; # 193
|
|---|
| 812 | my $l = @$deref;
|
|---|
| 813 | test $l, 3; # 194
|
|---|
| 814 | test $deref->[2], '13'; # 195
|
|---|
| 815 | $l = pop @$deref;
|
|---|
| 816 | test $l, 13; # 196
|
|---|
| 817 | $l = 1;
|
|---|
| 818 | test $deref->[$l], '12'; # 197
|
|---|
| 819 | # Repeated dereference
|
|---|
| 820 | my $double = bless { h => $deref,
|
|---|
| 821 | }, 'deref';
|
|---|
| 822 | test $double->{foo}, 5; # 198
|
|---|
|
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