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@colomon
Created October 7, 2014 15:58
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diff --git a/src/core/metaops.pm b/src/core/metaops.pm
index 1b87ef7..a92f8ec 100644
--- a/src/core/metaops.pm
+++ b/src/core/metaops.pm
@@ -96,6 +96,25 @@ sub METAOP_ZIP(\op, &reduce) {
}
}
+sub METAOP_CONTAINER_COMPARE(\op, &reduce) {
+ -> |lol {
+ my $arity = lol.elems;
+ my $rop = $arity == 2 ?? op !! &reduce(op);
+ my @lol = eager for ^lol.elems -> $i {
+ my \elem = lol[$i]; # can't use mapping here, mustn't flatten
+
+ if nqp::iscont(elem) { (elem,).list.item }
+ else { (elem,).flat.item }
+ }
+ loop {
+ my \z = @lol.map: { last unless .gimme(1); .shift }
+ return False if z.elems < $arity;
+ return False unless $rop(|z);
+ }
+ True;
+ }
+}
+
sub METAOP_REDUCE_LEFT(\op, :$triangle) {
my $x := $triangle ??
(sub (*@values) {
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