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reduce.t
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reduce.t
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use v6;
use Test;
plan 354;
=begin pod
=head1 DESCRIPTION
This test tests the C<[...]> reduce metaoperator.
Reference:
L<"http://groups.google.de/group/perl.perl6.language/msg/bd9eb275d5da2eda">
=end pod
# L<S03/"Reduction operators">
# [...] reduce metaoperator
{
my @array = <5 -3 7 0 1 -9>;
my $sum = 5 + -3 + 7 + 0 + 1 + -9; # laziness :)
is(([+] @array), $sum, "[+] works");
is(([*] 1,2,3), (1*2*3), "[*] works");
is(([-] 1,2,3), (1-2-3), "[-] works");
is(([/] 12,4,3), (12/4/3), "[/] works");
is(([div] 12,4,3), (12 div 4 div 3), "[div] works");
is(([**] 2,2,3), (2**2**3), "[**] works");
is(([%] 13,7,4), (13%7%4), "[%] works");
is(([mod] 13,7,4), (13 mod 7 mod 4), "[mod] works");
is((~ [\+] @array), "5 2 9 9 10 1", "[\\+] works");
is((~ [\-] 1, 2, 3), "1 -1 -4", "[\\-] works");
}
{
is ([~] <a b c d>), "abcd", "[~] works";
is (~ [\~] <a b c d>), "a ab abc abcd", "[\\~] works";
}
{
ok ([<] 1, 2, 3, 4), "[<] works (1)";
nok ([<] 1, 3, 2, 4), "[<] works (2)";
ok ([>] 4, 3, 2, 1), "[>] works (1)";
nok ([>] 4, 2, 3, 1), "[>] works (2)";
ok ([==] 4, 4, 4), "[==] works (1)";
nok ([==] 4, 5, 4), "[==] works (2)";
ok ([!=] 4, 5, 6), "[!=] works (1)";
nok ([!=] 4, 4, 4), "[!=] works (2)";
}
{
ok (! [eq] <a a b a>), '[eq] basic sanity (positive)';
ok ( [eq] <a a a a>), '[eq] basic sanity (negative)';
ok ( [ne] <a b c a>), '[ne] basic sanity (positive)';
ok (! [ne] <a a b c>), '[ne] basic sanity (negative)';
ok ( [lt] <a b c e>), '[lt] basic sanity (positive)';
ok (! [lt] <a a c e>), '[lt] basic sanity (negative)';
}
#?rakudo skip "=:= NYI"
{
my ($x, $y);
ok ( [=:=] $x, $x, $x), '[=:=] basic sanity 1';
ok (not [=:=] $x, $y, $x), '[=:=] basic sanity 2';
ok ( [!=:=] $x, $y, $x), '[!=:=] basic sanity (positive)';
ok (not [!=:=] $y, $y, $x), '[!=:=] basic sanity (negative)';
$y := $x;
ok ( [=:=] $y, $x, $y), '[=:=] after binding';
}
{
my $a = [1, 2];
my $b = [1, 2];
ok ([===] 1, 1, 1, 1), '[===] with literals';
ok ([===] $a, $a, $a), '[===] with vars (positive)';
nok ([===] $a, $a, [1, 2]), '[===] with vars (negative)';
ok ([!===] $a, $b, $a), '[!===] basic sanity (positive)';
nok ([!===] $a, $b, $b), '[!===] basic sanity (negative)';
}
{
is ~ ([\<] 1, 2, 3, 4).map({+$_}), "1 1 1 1", "[\\<] works (1)";
is ~ ([\<] 1, 3, 2, 4).map({+$_}), "1 1 0 0", "[\\<] works (2)";
is ~ ([\>] 4, 3, 2, 1).map({+$_}), "1 1 1 1", "[\\>] works (1)";
is ~ ([\>] 4, 2, 3, 1).map({+$_}), "1 1 0 0", "[\\>] works (2)";
is ~ ([\==] 4, 4, 4).map({+$_}), "1 1 1", "[\\==] works (1)";
is ~ ([\==] 4, 5, 4).map({+$_}), "1 0 0", "[\\==] works (2)";
is ~ ([\!=] 4, 5, 6).map({+$_}), "1 1 1", "[\\!=] works (1)";
is ~ ([\!=] 4, 5, 5).map({+$_}), "1 1 0", "[\\!=] works (2)";
is (~ [\**] 1, 2, 3), "3 8 1", "[\\**] (right assoc) works (1)";
is (~ [\**] 3, 2, 0), "0 1 3", "[\\**] (right assoc) works (2)";
}
{
my @array = (Mu, Mu, 3, Mu, 5);
is ([//] @array), 3, "[//] works";
#?rakudo skip '[orelse]'
is ([orelse] @array), 3, "[orelse] works";
}
{
my @array = (Mu, Mu, 0, 3, Mu, 5);
is ([||] @array), 3, "[||] works";
is ([or] @array), 3, "[or] works";
# Mu as well as [//] should work too, but testing it like
# this would presumably emit warnings when we have them.
is (~ [\||] 0, 0, 3, 4, 5), "0 0 3 3 3", "[\\||] works";
}
{
my @array = (Mu, Mu, 0, 3, Mu, 5);
my @array1 = (2, 3, 4);
nok ([&&] @array), "[&&] works with 1 false";
is ([&&] @array1), 4, "[&&] works";
nok ([and] @array), "[and] works with 1 false";
is ([and] @array1), 4, "[and] works";
}
# not currently legal without an infix subscript operator
# {
# my $hash = {a => {b => {c => {d => 42, e => 23}}}};
# is try { [.{}] $hash, <a b c d> }, 42, '[.{}] works';
# }
#
# {
# my $hash = {a => {b => 42}};
# is ([.{}] $hash, <a b>), 42, '[.{}] works two levels deep';
# }
#
# {
# my $arr = [[[1,2,3],[4,5,6]],[[7,8,9],[10,11,12]]];
# is ([.[]] $arr, 1, 0, 2), 9, '[.[]] works';
# }
{
# 18:45 < autrijus> hm, I found a way to easily do linked list consing in Perl6
# 18:45 < autrijus> [=>] 1..10;
my $list = [=>] 1,2,3;
is $list.key, 1, "[=>] works (1)";
is (try {$list.value.key}), 2, "[=>] works (2)";
is (try {$list.value.value}), 3, "[=>] works (3)";
}
{
my @array = <5 -3 7 0 1 -9>;
# according to http://irclog.perlgeek.de/perl6/2008-09-10#i_560910
# [,] returns a scalar (holding an Array)
my $count = 0;
$count++ for [,] @array;
is $count, 1, '[,] returns a single Array';
ok ([,] @array) ~~ Positional, '[,] returns something Positional';
}
# Following two tests taken verbatim from former t/operators/reduce.t
lives_ok({my @foo = [1..3] >>+<< [1..3] >>+<< [1..3]},'Sanity Check');
lives_ok({my @foo = [>>+<<] ([1..3],[1..3],[1..3])},'Parse [>>+<<]');
# Check that user defined infix ops work with [...], too.
#?pugs todo 'bug'
#?rakudo skip 'reduce of user defined op'
{
sub infix:<more_than_plus>(Int $a, Int $b) { $a + $b + 1 }
is (try { [more_than_plus] 1, 2, 3 }), 8, "[...] reduce metaop works on user defined ops";
}
# {
# my $arr = [ 42, [ 23 ] ];
# $arr[1][1] = $arr;
#
# is try { [.[]] $arr, 1, 1, 1, 1, 1, 0 }, 23, '[.[]] works with infinite data structures';
# }
#
# {
# my $hash = {a => {b => 42}};
# $hash<a><c> = $hash;
#
# is try { [.{}] $hash, <a c a c a b> }, 42, '[.{}] works with infinite data structures';
# }
# L<S03/"Reduction operators"/"Among the builtin operators, [+]() returns 0 and [*]() returns 1">
is( ([*]()), 1, "[*]() returns 1");
is( ([+]()), 0, "[+]() returns 0");
is( ([*] 41), 41, "[*] 41 returns 41");
is( ([*] 42), 42, "[*] 42 returns 42");
is( ~([\*] 42), "42", "[\*] 42 returns (42)");
is( ([~] 'towel'), 'towel', "[~] 'towel' returns 'towel'");
is( ([~] 'washcloth'), 'washcloth', "[~] 'washcloth' returns 'washcloth'");
is( ([\~] 'towel'), 'towel', "[\~] 'towel' returns 'towel'");
ok( ([\~] 'towel') ~~ Iterable, "[\~] 'towel' returns something Iterable");
is( ([<] 42), Bool::True, "[<] 42 returns true");
is( ~([\<] 42), ~True, "[\<] 42 returns '1'");
ok( ([\<] 42) ~~ Iterable, "[\<] 42 returns something Iterable");
is( ([\*] 1..*).[^10].join(', '), '1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800',
'triangle reduce is lazy');
is( ([\R~] 'a'..*).[^8].join(', '), 'a, ba, cba, dcba, edcba, fedcba, gfedcba, hgfedcba',
'triangle reduce is lazy');
# RT #65164 implement [^^]
{
is ([^^] 0, 42), 42, '[^^] works (one of two true)';
is ([^^] 42, 0), 42, '[^^] works (one of two true)';
ok ! ([^^] 1, 42), '[^^] works (two true)';
ok ! ([^^] 0, 0), '[^^] works (two false)';
ok ! ([^^] 0, 0, 0), '[^^] works (three false)';
ok ! ([^^] 5, 9, 17), '[^^] works (three true)';
is ([^^] 5, 9, 0), (5 ^^ 9 ^^ 0), '[^^] mix 1';
is ([^^] 5, 0, 17), (5 ^^ 0 ^^ 17), '[^^] mix 2';
is ([^^] 0, 9, 17), (0 ^^ 9 ^^ 17), '[^^] mix 3';
is ([^^] 5, 0, 0), (5 ^^ 0 ^^ 0), '[^^] mix 4';
is ([^^] 0, 9, 0), (0 ^^ 9 ^^ 0), '[^^] mix 5';
is ([^^] 0, 0, 17), (0 ^^ 0 ^^ 17), '[^^] mix 6';
nok ([^^] ()), 'reduce empty list ok';
# test False / undefined things
my $msg1 = 'reduce [^^] false variable test';
my $msg2 = 'infix ^^ false variable test';
for (0, '0', '', Bool::False, Any, Mu, Nil) -> $undef {
ok ( [^^] $undef, $undef, $undef, 5 ), "|{$undef.perl}| $msg1 \#1";
nok ( [^^] 1, 2, $undef, 3, $undef ), "|{$undef.perl}| $msg1 \#2";
nok ( [^^] $undef, $undef, 1, 5 ), "|{$undef.perl}| $msg1 \#3";
nok ( [^^] 1, $undef, $undef, 5 ), "|{$undef.perl}| $msg1 \#4";
ok ( [^^] $undef, $undef, 2, $undef ), "|{$undef.perl}| $msg1 \#5";
nok ( [^^] $undef, $undef, $undef ), "|{$undef.perl}| $msg1 \#6";
nok ( [^^] $undef, $undef ), "|{$undef.perl}| $msg1 \#7";
ok ( [^^] $undef, 1 ), "|{$undef.perl}| $msg1 \#8";
ok ( [^^] 1, $undef ), "|{$undef.perl}| $msg1 \#9";
nok ( [^^] $undef ), "|{$undef.perl}| $msg1 \#10";
ok ( $undef ^^ $undef ^^ $undef ^^ 5 ), "|{$undef.perl}| $msg2 \#1";
nok ( 1 ^^ 2 ^^ $undef ^^ 3 ^^ $undef ), "|{$undef.perl}| $msg2 \#2";
nok ( $undef ^^ $undef ^^ 1 ^^ 5 ), "|{$undef.perl}| $msg2 \#3";
nok ( 1 ^^ $undef ^^ $undef ^^ 5 ), "|{$undef.perl}| $msg2 \#4";
ok ( $undef ^^ $undef ^^ 2 ^^ $undef ), "|{$undef.perl}| $msg2 \#5";
nok ( $undef ^^ $undef ^^ $undef ), "|{$undef.perl}| $msg2 \#6";
nok ( $undef ^^ $undef ), "|{$undef.perl}| $msg2 \#7";
ok ( $undef ^^ 1 ), "|{$undef.perl}| $msg2 \#8";
ok ( 1 ^^ $undef ), "|{$undef.perl}| $msg2 \#9";
}
# test numericy true things
$msg1 = 'reduce [^^] true numbery variable test';
$msg2 = 'infix ^^ true numbery variable test';
for (1, -147, pi, Bool::True) -> $def {
nok ( [^^] 0, 0, $def, 3, $def ), "|{$def.perl}| $msg1 \#1";
nok ( [^^] $def, $def, 0 ), "|{$def.perl}| $msg1 \#2";
nok ( [^^] 1, $def, Any, 5 ), "|{$def.perl}| $msg1 \#3";
ok ( [^^] $def, 0, 0, 0 ) == $def, "|{$def.perl}| $msg1 \#4";
ok ( [^^] Any, Any, Any, $def ) == $def, "|{$def.perl}| $msg1 \#5";
nok ( [^^] $def, $def ), "|{$def.perl}| $msg1 \#6";
ok ( [^^] $def, 0 ) == $def, "|{$def.perl}| $msg1 \#7";
ok ( [^^] 0, $def ) == $def, "|{$def.perl}| $msg1 \#8";
ok ( [^^] $def ), "|{$def.perl}| $msg1 \#9";
nok ( 0 ^^ 0 ^^ $def ^^ 3 ^^ $def ), "|{$def.perl}| $msg2 \#1";
nok ( $def ^^ $def ^^ 0 ), "|{$def.perl}| $msg2 \#2";
nok ( 1 ^^ $def ^^ Any ^^ 5 ), "|{$def.perl}| $msg2 \#3";
ok ( $def ^^ 0 ^^ 0 ^^ 0 ) == $def, "|{$def.perl}| $msg2 \#4";
ok ( Any ^^ Any ^^ Any ^^ $def ) == $def,"|{$def.perl}| $msg2 \#5";
nok ( $def ^^ $def ), "|{$def.perl}| $msg2 \#6";
ok ( $def ^^ 0 ) == $def, "|{$def.perl}| $msg2 \#7";
ok ( 0 ^^ $def ) == $def, "|{$def.perl}| $msg2 \#8";
}
# test stringy true things
$msg1 = 'reduce [^^] true string variable test';
$msg2 = 'infix ^^ true string variable test';
for ('no', 'Bob', '10', 'False') -> $def {
nok ( [^^] $def, $def, $def, 'string' ), "|{$def.perl}| $msg1 \#1";
nok ( [^^] '', '', $def, 'str', $def ), "|{$def.perl}| $msg1 \#2";
nok ( [^^] $def, $def,'' ), "|{$def.perl}| $msg1 \#3";
nok ( [^^] 1, $def, Any, 5 ), "|{$def.perl}| $msg1 \#4";
ok ( [^^] $def, '', '', '' ) eq $def, "|{$def.perl}| $msg1 \#5";
ok ( [^^] Any, Any, Any, $def ) eq $def, "|{$def.perl}| $msg1 \#6";
nok ( [^^] $def, $def ), "|{$def.perl}| $msg1 \#7";
ok ( [^^] $def, '' ) eq $def, "|{$def.perl}| $msg1 \#8";
ok ( [^^] '', $def ) eq $def, "|{$def.perl}| $msg1 \#9";
ok ( [^^] $def ) eq $def, "|{$def.perl}| $msg1 \#10";
nok ( $def ^^ $def ^^ $def ^^ 'string' ), "|{$def.perl}| $msg2 \#1";
nok ( '' ^^ '' ^^ $def ^^ 'str' ^^ $def ),"|{$def.perl}| $msg2 \#2";
nok ( $def ^^ $def ^^'' ), "|{$def.perl}| $msg2 \#3";
nok ( 1 ^^ $def ^^ Any ^^ 5 ), "|{$def.perl}| $msg2 \#4";
ok ( $def ^^ '' ^^ '' ^^ '' ) eq $def, "|{$def.perl}| $msg2 \#5";
ok ( Any ^^ Any ^^ Any ^^ $def ) eq $def,"|{$def.perl}| $msg2 \#6";
nok ( $def ^^ $def ), "|{$def.perl}| $msg2 \#7";
ok ( $def ^^ '' ) eq $def, "|{$def.perl}| $msg2 \#8";
ok ( '' ^^ $def ) eq $def, "|{$def.perl}| $msg2 \#9";
}
is (join ', ', [\^^] False, 0, 5, '', False, 16, 0, Any, "hello", False),
(join ', ', False, 0, 5, 5, 5, False, False, False, False, False),
'[\^^]';
is (join ', ', [\xor] 'xyzzy', Int, 0.0, '', False, 'plugh', 4, 2, 'xyzzy'),
(join ', ', 'xyzzy', 'xyzzy', 'xyzzy', 'xyzzy', 'xyzzy', False, False, False, False),
'[\xor]';
}
# RT #75234
# rakudo had a problem where once-used meta operators weren't installed
# in a sufficiently global location, so using a meta operator in class once
# makes it unusable further on
{
class A {
method m { return [~] gather for ^3 {take 'a'} }
}
class B {
method n { return [~] gather for ^4 {take 'b'}}
}
is A.new.m, 'aaa', '[~] works in first class';
is B.new.n, 'bbbb', '[~] works in second class';
is ([~] 1, 2, 5), '125', '[~] works outside class';
}
#?rakudo todo 'RT 82210'
ok [+](1..10) + 0 == ([+] 1..10) + 0,
'a listop with immediate () is a function call (RT 82210)';
done;
# vim: ft=perl6