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/diagnosticsetiterator.h

@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 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 <iterator>
+
+#include <clang-c/Index.h>
+
+namespace ClangBackEnd {
+
+using uint = unsigned int;
+
+class DiagnosticSet;
+class Diagnostic;
+
+class DiagnosticSetIterator : public std::iterator<std::random_access_iterator_tag, Diagnostic, uint>
+{
+public:
+    DiagnosticSetIterator(CXDiagnosticSet cxDiagnosticSet, uint index)
+        : cxDiagnosticSet(cxDiagnosticSet),
+          index(index)
+    {}
+
+    DiagnosticSetIterator(const DiagnosticSetIterator &other)
+        : cxDiagnosticSet(other.cxDiagnosticSet),
+          index(other.index)
+    {}
+
+    DiagnosticSetIterator& operator++()
+    {
+        ++index;
+        return *this;
+    }
+
+    DiagnosticSetIterator operator++(int)
+    {
+        uint oldIndex = index++;
+        return DiagnosticSetIterator(cxDiagnosticSet, oldIndex);
+    }
+
+    bool operator==(const DiagnosticSetIterator &other)
+    {
+        return index == other.index && cxDiagnosticSet == other.cxDiagnosticSet;
+    }
+
+    bool operator!=(const DiagnosticSetIterator &other)
+    {
+        return index != other.index || cxDiagnosticSet != other.cxDiagnosticSet;
+    }
+
+    Diagnostic operator*()
+    {
+        return Diagnostic(clang_getDiagnosticInSet(cxDiagnosticSet, index));
+    }
+
+private:
+    CXDiagnosticSet cxDiagnosticSet;
+    uint index;
+};
+
+}