Clang: Provide tooltips

This includes also the query data for the help system (F1) for an
identifier under cursor.

Regressions (libclang changes necessary):
 - Function signatures do not contain default values.
 - Aliases are not resolved for/at:
   - template types
   - qualified name of a type

Fixes/Improvements:
 - Resolve "auto"
 - On a template type, show also the template parameter.
 - For a typedef like
     typedef long long superlong;
   the tooltip was "long long superlong", which was confusing.
   Now, "long long" is shown.

New:
 - Show first or \brief paragraph of a documentation comment.
 - Show size of a class at definition.
 - Show size of a field member in class definition.

Task-number: QTCREATORBUG-11259
Change-Id: Ie1a07930d0e882015d07dc43e35bb81a685cdeb8
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/plugins/clangcodemodel/clangbackendreceiver.h b/src/plugins/clangcodemodel/clangbackendreceiver.h
index d7a966eae9..921150a52d 100644
--- a/src/plugins/clangcodemodel/clangbackendreceiver.h
+++ b/src/plugins/clangcodemodel/clangbackendreceiver.h
@@ -27,6 +27,7 @@
 
 #include <cpptools/cppcursorinfo.h>
 #include <cpptools/cppsymbolinfo.h>
+#include <cpptools/baseeditordocumentprocessor.h>
 
 #include <clangsupport/clangcodemodelclientinterface.h>
 
@@ -59,6 +60,7 @@ public:
                                  const CppTools::SemanticInfo::LocalUseMap &localUses
                                      = CppTools::SemanticInfo::LocalUseMap());
     QFuture<CppTools::SymbolInfo> addExpectedRequestFollowSymbolMessage(quint64 ticket);
+    QFuture<CppTools::ToolTipInfo> addExpectedToolTipMessage(quint64 ticket);
     bool isExpectingCodeCompletedMessage() const;
 
     void reset();
@@ -70,6 +72,7 @@ private:
 
     void documentAnnotationsChanged(const ClangBackEnd::DocumentAnnotationsChangedMessage &message) override;
     void references(const ClangBackEnd::ReferencesMessage &message) override;
+    void tooltip(const ClangBackEnd::ToolTipMessage &message) override;
     void followSymbol(const ClangBackEnd::FollowSymbolMessage &message) override;
 
 private:
@@ -89,7 +92,7 @@ private:
         CppTools::SemanticInfo::LocalUseMap localUses;
     };
     QHash<quint64, ReferencesEntry> m_referencesTable;
-
+    QHash<quint64, QFutureInterface<CppTools::ToolTipInfo>> m_toolTipsTable;
     QHash<quint64, QFutureInterface<CppTools::SymbolInfo>> m_followTable;
 };