CLang: Add ProjectPartNameId

It is needed later for project part id caching.

Change-Id: Id053197c030c98815acf38ba7e7cee9a6968a962
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/clangsupport/clangsupport-lib.pri

@@ -118,6 +118,7 @@ HEADERS += \
     $$PWD/projectpartid.h \
     $$PWD/projectpartsstorage.h \
     $$PWD/projectpartsstorageinterface.h \
+    $$PWD/projectpartstoragestructs.h \
     $$PWD/requestcompletionsmessage.h \
     $$PWD/echomessage.h \
     $$PWD/endmessage.h \

src/libs/clangsupport/projectpartstoragestructs.h

@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 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 "projectpartid.h"
+#include "stringcacheentry.h"
+
+#include <utils/smallstring.h>
+
+#include <vector>
+
+namespace ClangBackEnd {
+
+namespace Internal {
+
+class ProjectPartNameId
+    : public StringCacheEntry<Utils::PathString, Utils::SmallStringView, ProjectPartId>
+{
+    using Base = StringCacheEntry<Utils::PathString, Utils::SmallStringView, ProjectPartId>;
+
+public:
+    using Base::Base;
+
+    ProjectPartNameId(Utils::SmallStringView projectPartName, int projectPartId)
+        : Base(projectPartName, projectPartId)
+    {}
+};
+
+using ProjectPartNameIds = std::vector<ProjectPartNameId>;
+} // namespace Internal
+
+} // namespace ClangBackEnd