Restructure for code reuse and hiding implementation.

1 files changed, 16 insertions, 0 deletions

diff --git a/searchlib/src/vespa/searchlib/queryeval/idiversifier.h b/searchlib/src/vespa/searchlib/queryeval/idiversifier.h
new file mode 100644
index 00000000000..e77cb959eeb
--- /dev/null
+++ b/searchlib/src/vespa/searchlib/queryeval/idiversifier.h
@@ -0,0 +1,16 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#pragma once
+
+#include <cstdint>
+
+namespace search::queryeval {
+
+struct IDiversifier {
+    virtual ~IDiversifier() {}
+    /**
+     * Will tell if this document should be kept, and update state for further filtering.
+     */
+    virtual bool accepted(uint32_t docId) = 0;
+};
+}