impl/memory: Implement Queries

impl/memory/error_markers.go

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package memory
+
+// memoryCorruption is a marker function to indicate that given error is
+// actually due to corrupted memory to make it easier to read the code.
+func memoryCorruption(err error) {
+        if err != nil {
+                panic(err)
+        }
+}
+
+// impossible is a marker function to indicate that the given error is an
+// impossible state, due to conditions outside of the function.
+func impossible(err error) {
+        if err != nil {
+                panic(err)
+        }
+}