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set_symmetric_difference.pm
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set_symmetric_difference.pm
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# This test file tests the following set operators:
# (^) set symmetric difference (Texas)
# ⊖ set symmetric difference
proto sub infix:<(^)>(|) is pure { * }
multi sub infix:<(^)>() { set() }
multi sub infix:<(^)>(QuantHash:D $a) { $a } # Set/Bag/Mix
multi sub infix:<(^)>(SetHash:D $a) { $a.Set }
multi sub infix:<(^)>(BagHash:D $a) { $a.Bag }
multi sub infix:<(^)>(MixHash:D $a) { $a.Mix }
multi sub infix:<(^)>(Any $a) { $a.Set } # also for Iterable/Map
multi sub infix:<(^)>(Setty:D $a, Setty:D $b) {
nqp::if(
(my $araw := $a.RAW-HASH) && nqp::elems($araw),
nqp::if(
(my $braw := $b.RAW-HASH) && nqp::elems($braw),
nqp::stmts( # both are initialized
nqp::if(
nqp::islt_i(nqp::elems($araw),nqp::elems($braw)),
nqp::stmts( # $a smallest, iterate over it
(my $iter := nqp::iterator($araw)),
(my $elems := nqp::clone($braw))
),
nqp::stmts( # $b smallest, iterate over that
($iter := nqp::iterator($braw)),
($elems := nqp::clone($araw))
)
),
nqp::while(
$iter,
nqp::if( # remove if in both
nqp::existskey($elems,nqp::iterkey_s(nqp::shift($iter))),
nqp::deletekey($elems,nqp::iterkey_s($iter)),
nqp::bindkey($elems,nqp::iterkey_s($iter),nqp::iterval($iter))
)
),
nqp::create(Set).SET-SELF($elems)
),
nqp::if(nqp::istype($a,Set),$a,$a.Set) # $b empty, so $a
),
nqp::if(nqp::istype($b,Set),$b,$b.Set) # $a empty, so $b
)
}
multi sub infix:<(^)>(Setty:D $a, Mixy:D $b) { $a.Mix (^) $b }
multi sub infix:<(^)>(Setty:D $a, Baggy:D $b) { $a.Bag (^) $b }
multi sub infix:<(^)>(Setty:D $a, Any $b) { $a (^) $b.Set }
multi sub infix:<(^)>(Mixy:D $a, Mixy:D $b) {
nqp::if(
(my $araw := $a.RAW-HASH) && nqp::elems($araw),
nqp::if(
(my $braw := $b.RAW-HASH) && nqp::elems($braw),
nqp::stmts( # both are initialized
nqp::if(
nqp::islt_i(nqp::elems($araw),nqp::elems($braw)),
nqp::stmts( # $a smallest, iterate over it
(my $iter := nqp::iterator(my $base := $araw)),
(my $elems := nqp::clone($braw))
),
nqp::stmts( # $b smallest, iterate over that
($iter := nqp::iterator($base := $braw)),
($elems := nqp::clone($araw))
)
),
nqp::while(
$iter,
nqp::if( # remove if in both
nqp::existskey($elems,nqp::iterkey_s(nqp::shift($iter))),
nqp::if(
(my $diff := nqp::getattr(nqp::iterval($iter),Pair,'$!value')
- nqp::getattr(
nqp::atkey($elems,nqp::iterkey_s($iter)),
Pair,
'$!value'
)
),
nqp::bindkey(
$elems,
nqp::iterkey_s($iter),
nqp::p6bindattrinvres(
nqp::clone(nqp::iterval($iter)),Pair,'$!value',abs($diff)
)
),
nqp::deletekey($elems,nqp::iterkey_s($iter))
),
nqp::bindkey(
$elems,
nqp::iterkey_s($iter),
nqp::clone(nqp::iterval($iter))
)
)
),
nqp::create(Mix).SET-SELF($elems)
),
nqp::if(nqp::istype($a,Mix),$a,$a.Mix) # $b empty, so $a
),
nqp::if(nqp::istype($b,Mix),$b,$b.Mix) # $a empty, so $b
)
}
multi sub infix:<(^)>(Mixy:D $a, Baggy:D $b) { $a (^) $b.Mix }
multi sub infix:<(^)>(Mixy:D $a, Any $b) { $a (^) $b.Mix }
multi sub infix:<(^)>(Baggy:D $a, Mixy:D $b) { $a.Mix (^) $b }
multi sub infix:<(^)>(Baggy:D $a, Baggy:D $b) {
nqp::if(
(my $araw := $a.RAW-HASH) && nqp::elems($araw),
nqp::if(
(my $braw := $b.RAW-HASH) && nqp::elems($braw),
nqp::stmts( # both are initialized
nqp::if(
nqp::islt_i(nqp::elems($araw),nqp::elems($braw)),
nqp::stmts( # $a smallest, iterate over it
(my $iter := nqp::iterator(my $base := $araw)),
(my $elems := nqp::clone($braw))
),
nqp::stmts( # $b smallest, iterate over that
($iter := nqp::iterator($base := $braw)),
($elems := nqp::clone($araw))
)
),
nqp::while(
$iter,
nqp::if( # remove if in both
nqp::existskey($elems,nqp::iterkey_s(nqp::shift($iter))),
nqp::if(
(my int $diff = nqp::sub_i(
nqp::getattr(nqp::iterval($iter),Pair,'$!value'),
nqp::getattr(
nqp::atkey($elems,nqp::iterkey_s($iter)),
Pair,
'$!value'
)
)),
nqp::bindkey(
$elems,
nqp::iterkey_s($iter),
nqp::p6bindattrinvres(
nqp::clone(nqp::iterval($iter)),
Pair,
'$!value',
nqp::abs_i($diff)
)
),
nqp::deletekey($elems,nqp::iterkey_s($iter))
),
nqp::bindkey($elems,nqp::iterkey_s($iter),nqp::iterval($iter))
)
),
nqp::create(Bag).SET-SELF($elems)
),
nqp::if(nqp::istype($a,Bag),$a,$a.Bag) # $b empty, so $a
),
nqp::if(nqp::istype($b,Bag),$b,$b.Bag) # $a empty, so $b
)
}
multi sub infix:<(^)>(Baggy:D $a, Any $b) { $a (^) $b.Bag }
multi sub infix:<(^)>(Map:D $a, Map:D $b) {
nqp::if(
nqp::eqaddr($a.keyof,Str(Any)) && nqp::eqaddr($b.keyof,Str(Any)),
nqp::if( # both ordinary Str hashes
(my $araw := nqp::getattr(nqp::decont($a),Map,'$!storage'))
&& nqp::elems($araw),
nqp::if( # $a has elems
(my $braw := nqp::getattr(nqp::decont($b),Map,'$!storage'))
&& nqp::elems($braw),
nqp::stmts( # $b also, need to check both
(my $elems := nqp::create(Rakudo::Internals::IterationSet)),
(my $iter := nqp::iterator($araw)),
nqp::while( # check $a's keys in $b
$iter,
nqp::unless(
nqp::existskey($braw,nqp::iterkey_s(nqp::shift($iter))),
nqp::bindkey(
$elems,nqp::iterkey_s($iter).WHICH,nqp::iterkey_s($iter)
)
)
),
($iter := nqp::iterator($braw)),
nqp::while( # check $b's keys in $a
$iter,
nqp::unless(
nqp::existskey($araw,nqp::iterkey_s(nqp::shift($iter))),
nqp::bindkey(
$elems,nqp::iterkey_s($iter).WHICH,nqp::iterkey_s($iter)
)
)
),
nqp::create(Set).SET-SELF($elems)
),
$a.Set # no $b, so $a
),
$b.Set # no $a, so $b
),
$a.Set (^) $b.Set # object hash(es), coerce!
)
}
multi sub infix:<(^)>(Iterable:D $a, Iterable:D $b) {
nqp::if(
(my $aiterator := $a.flat.iterator).is-lazy
|| (my $biterator := $b.flat.iterator).is-lazy,
Failure.new(X::Cannot::Lazy.new(:action('symmetric diff'),:what<set>)),
nqp::stmts(
(my $elems := Rakudo::QuantHash.ADD-PAIRS-TO-SET(
nqp::create(Rakudo::Internals::IterationSet),
$aiterator
)),
nqp::until(
nqp::eqaddr((my $pulled := $biterator.pull-one),IterationEnd),
nqp::if(
nqp::existskey($elems,(my $WHICH := $pulled.WHICH)),
nqp::deletekey($elems,$WHICH),
nqp::bindkey($elems,$WHICH,$pulled)
)
),
nqp::create(Set).SET-SELF($elems)
)
)
}
multi sub infix:<(^)>(Any $a, Any $b) { $a.Set (^) $b.Set }
multi sub infix:<(^)>(**@p) is pure {
if Rakudo::Internals.ANY_DEFINED_TYPE(@p,Baggy) {
my $result = @p.shift;
$result = $result (^) @p.shift while @p;
$result
} else {
return ([(+)] @p>>.Bag).grep(*.value == 1).Set;
}
}
# U+2296 CIRCLED MINUS
only sub infix:<⊖>($a, $b) is pure {
$a (^) $b;
}
# vim: ft=perl6 expandtab sw=4