Clang: Introduce switching/adding of warning configurations

A warning configuration is a list of command line (warning) options for
libclang. Three non-editable built-in configurations are provided by
default. The user can copy a configuration to customize it.

This is still a global setting and it changes take effect after
re-opening a document. Both issues will be addressed in follow-up
changes.

Change-Id: I86667d7dc39ad31b88666454220e6da563797740
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

src/plugins/cpptools/cppcodemodelsettings.h

@@ -28,6 +28,8 @@
 
 #include "cpptools_global.h"
 
+#include "clangdiagnosticconfigsmodel.h"
+
 #include <QObject>
 #include <QStringList>
 
@@ -52,9 +54,12 @@ public:
     void toSettings(QSettings *s);
 
 public:
-    static QStringList defaultExtraClangOptions();
-    QStringList extraClangOptions() const;
-    void setExtraClangOptions(const QStringList &extraClangOptions);
+    Core::Id clangDiagnosticConfigId() const;
+    void setClangDiagnosticConfigId(const Core::Id &configId);
+    const ClangDiagnosticConfig clangDiagnosticConfig() const;
+
+    ClangDiagnosticConfigs clangCustomDiagnosticConfigs() const;
+    void setClangCustomDiagnosticConfigs(const ClangDiagnosticConfigs &configs);
 
     PCHUsage pchUsage() const;
     void setPCHUsage(PCHUsage pchUsage);
@@ -64,10 +69,12 @@ public: // for tests
 
 signals:
     void changed();
+    void clangDiagnosticConfigIdChanged();
 
 private:
-    QStringList m_extraClangOptions;
     PCHUsage m_pchUsage = PchUse_None;
+    ClangDiagnosticConfigs m_clangCustomDiagnosticConfigs;
+    Core::Id m_clangDiagnosticConfigId;
 };
 
 } // namespace CppTools