From 6a0373608d2709e87fcf444b996008958e16e71d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adam=20Wardy=C5=84ski?= <no@email>
Date: Mon, 8 Nov 2010 15:01:02 +0100
Subject: [PATCH] Predicate that checks if one set intersects with another
---
libwccl/ops/intersects.h | 58 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 libwccl/ops/intersects.h
diff --git a/libwccl/ops/intersects.h b/libwccl/ops/intersects.h
new file mode 100644
index 0000000..25cc2cb
--- /dev/null
+++ b/libwccl/ops/intersects.h
@@ -0,0 +1,58 @@
+#ifndef INTERSECTS_H
+#define INTERSECTS_H
+
+#include <boost/shared_ptr.hpp>
+
+#include <libcorpus2/tagset.h>
+
+#include <libwccl/values/strset.h>
+#include <libwccl/values/tset.h>
+#include <libwccl/values/bool.h>
+#include <libwccl/ops/setpredicate.h>
+#include <libwccl/ops/formatters.h>
+
+namespace Wccl {
+
+/**
+ * Class that realises a predicate checking if one set intersects with another
+ */
+template <class T>
+class Intersects : public SetPredicate<T>
+{
+public:
+ typedef typename SetPredicate<T>::SetFunctionPtr SetFunctionPtr;
+
+ Intersects(const SetFunctionPtr& set1_expr, const SetFunctionPtr& set2_expr)
+ : SetPredicate<T>(set1_expr, set2_expr)
+ {
+ }
+
+ virtual const std::string raw_operator_name() const {
+ return "inter";
+ }
+
+protected:
+
+ typedef typename SetPredicate<T>::BaseRetValPtr BaseRetValPtr;
+
+ /**
+ * Take value of possible subset in question. If it is an empty set, return False.
+ * Otherwise, take value of the set that is being compared to.
+ * Return True if the possible subset is indeed a subset of the compared set,
+ * otherwise return False.
+ */
+ virtual BaseRetValPtr apply_internal(const SentenceContext& context) const {
+ boost::shared_ptr<T> set1 = this->set1_expr_->apply(context);
+ boost::shared_ptr<T> set2 = this->set2_expr_->apply(context);
+ if(set1->is_subset_of(*set2)) {
+ return Predicate::True->apply(context);
+ }
+ return Predicate::False->apply(context);
+ }
+
+};
+
+} /* end ns Wccl */
+
+
+#endif // INTERSECTS_H
--
GitLab