Base class for predicates that operate on two sets

libwccl/ops/setpredicate.h

+#ifndef SETPREDICATE_H
+#define SETPREDICATE_H
+
+#include <boost/shared_ptr.hpp>
+#include <boost/mpl/list.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/mpl/count.hpp>
+#include <libwccl/ops/predicate.h>
+#include <libwccl/ops/formatters.h>
+
+namespace Wccl {
+
+/**
+ * Abstract base class for predicates which operate on two sets
+ */
+template<class T>
+class SetPredicate : public Predicate {
+	BOOST_MPL_ASSERT(( boost::mpl::count<boost::mpl::list<StrSet, TSet>, T> ));
+public:
+	typedef boost::shared_ptr<Function<T> > SetFunctionPtr;
+
+	SetPredicate(const SetFunctionPtr& set1_expr, const SetFunctionPtr& set2_expr)
+		: set1_expr_(set1_expr), set2_expr_(set2_expr)
+	{
+		BOOST_ASSERT(set1_expr_);
+		BOOST_ASSERT(set2_expr_);
+	}
+
+	virtual std::string to_string(const Corpus2::Tagset& tagset) const {
+		return BinaryFunctionFormatter::to_string(tagset, *this, *set1_expr_, *set2_expr_);
+	}
+
+	virtual std::string to_raw_string() const {
+		return BinaryFunctionFormatter::to_raw_string(*this, *set1_expr_, *set2_expr_);
+	}
+
+protected:
+	const SetFunctionPtr set1_expr_;
+	const SetFunctionPtr set2_expr_;
+
+	typedef FunctionBase::BaseRetValPtr BaseRetValPtr;
+};
+
+} /* end ns Wccl */
+
+#endif // SETPREDICATE_H