Clang: Improve ProjectPartArtefact

Empty strings were only handled by accident and wrongly formatted ones
were never handled. Now we do nothing for empty strings and throw an
exception from wrongly formatted strings. The exceptions are very helpful
in the test code because the show errors the the testing data.

Change-Id: I87d1678eda7502fdc3f74f51fad491803d28582b
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/projectpartartefact.h

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** 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 "projectpartartefactexception.h"
+
+#include <utils/smallstringvector.h>
+
+#include <compilermacro.h>
+
+QT_FORWARD_DECLARE_CLASS(QJsonDocument)
+QT_FORWARD_DECLARE_STRUCT(QJsonParseError)
+
+namespace ClangBackEnd {
+
+class ProjectPartArtefact
+{
+public:
+    ProjectPartArtefact(Utils::SmallStringView compilerArgumentsText,
+                        Utils::SmallStringView compilerMacrosText,
+                        int projectPartId);
+
+    static
+    Utils::SmallStringVector toStringVector(Utils::SmallStringView jsonText);
+    static
+    CompilerMacros createCompilerMacrosFromDocument(const QJsonDocument &document);
+    static
+    CompilerMacros toCompilerMacros(Utils::SmallStringView jsonText);
+    static
+    QJsonDocument createJsonDocument(Utils::SmallStringView jsonText,
+                                     const char *whatError);
+    static
+    void checkError(const char *whatError, const QJsonParseError &error);
+    friend
+    bool operator==(const ProjectPartArtefact &first, const ProjectPartArtefact &second);
+
+public:
+    Utils::SmallStringVector compilerArguments;
+    CompilerMacros compilerMacros;
+    int projectPartId = -1;
+};
+
+using ProjectPartArtefacts = std::vector<ProjectPartArtefact>;
+} // namespace ClangBackEnd