Clang: Rename directory ipcsource to source

Now it's in accordance with clangrefactoringbackend/source and
clangpchmanagerbackend/source.

Change-Id: I939cfc72cffb8fcde0649f125e6efb6670d1cbc3
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangbackend/source/clangreferencescollector.h

@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <clangsupport/sourcerangecontainer.h>
+
+#include <QVector>
+
+#include <clang-c/Index.h>
+
+namespace ClangBackEnd {
+
+class ReferencesResult
+{
+public:
+    ReferencesResult() = default;
+    ReferencesResult(bool isLocalVariable, const QVector<SourceRangeContainer> &references)
+        : isLocalVariable(isLocalVariable)
+        , references(references)
+    {}
+
+    bool operator==(const ReferencesResult &other) const
+    {
+        return isLocalVariable == other.isLocalVariable
+            && references == other.references;
+    }
+
+    bool isLocalVariable = false;
+    QVector<SourceRangeContainer> references;
+};
+
+ReferencesResult collectReferences(CXTranslationUnit cxTranslationUnit,
+                                   uint line,
+                                   uint column);
+
+} // namespace ClangBackEnd
+