Clang: Use completion through backend process

This makes us independent of libclang crashes for completion.
Re-parsing for highlighting still happens in the Qt Creator process.

Run in verbose mode:
    qtc.clangcodemodel.ipc=true

Run tests:
    -test "ClangCodeModel"

Task-number: QTCREATORBUG-14108
Task-number: QTCREATORBUG-12819
Change-Id: Id3e95bd2afdb6508bbd1d35fddc69534a909b905
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/src/plugins/cpptools/cppmodelmanagersupport.h b/src/plugins/cpptools/cppmodelmanagersupport.h
index bea1ef58aa..fe592d664d 100644
--- a/src/plugins/cpptools/cppmodelmanagersupport.h
+++ b/src/plugins/cpptools/cppmodelmanagersupport.h
@@ -33,6 +33,7 @@
 
 #include "cpptools_global.h"
 
+#include <QSharedPointer>
 #include <QString>
 
 namespace TextEditor { class TextDocument; }
@@ -45,16 +46,27 @@ class CppCompletionAssistProvider;
 class CPPTOOLS_EXPORT ModelManagerSupport
 {
 public:
-    virtual ~ModelManagerSupport() = 0;
+    using Ptr = QSharedPointer<ModelManagerSupport>;
 
-    virtual QString id() const = 0;
-    virtual QString displayName() const = 0;
+public:
+    virtual ~ModelManagerSupport() = 0;
 
     virtual CppCompletionAssistProvider *completionAssistProvider() = 0;
     virtual BaseEditorDocumentProcessor *editorDocumentProcessor(
                 TextEditor::TextDocument *baseTextDocument) = 0;
 };
 
+class CPPTOOLS_EXPORT ModelManagerSupportProvider
+{
+public:
+    virtual ~ModelManagerSupportProvider() {}
+
+    virtual QString id() const = 0;
+    virtual QString displayName() const = 0;
+
+    virtual ModelManagerSupport::Ptr createModelManagerSupport() = 0;
+};
+
 } // CppTools namespace
 
 #endif // CPPTOOLS_CPPMODELMANAGERSUPPORT_H