Gradually typed Link

Turn the Link class into a template abstracting over the link's argument and
return types, but provide default template arguments that keep the generic,
unsafe "void* in, sal_IntPtr out" behvior.  That way, individual uses of the
Link class can be updated over time.

All the related macros are duplicated with ..._TYPED counterparts, that
additionally take the RetType (except for LINK_TYPED, which manages to infer the
relevant types from the supplied Member).

(It would have been attractive to change the "untyped" LinkStubs from taking a
void* to a properly typed ArgType parameter, too, but that would cause
-fsanitize=function to flag uses of "untyped" Link::Call.)

Change-Id: I3b0140378bad99abbf240140ebb4a46a05d2d2f8

1 files changed, 3 insertions, 3 deletions

diff --git a/include/vcl/layout.hxx b/include/vcl/layout.hxx
index bec9976a7317..85c613919020 100644
--- a/include/vcl/layout.hxx
+++ b/include/vcl/layout.hxx
@@ -544,15 +544,15 @@ public:
         return m_pDisclosureButton->GetText();
     }
     virtual void StateChanged(StateChangedType nType) SAL_OVERRIDE;
-    void  SetExpandedHdl( const Link& rLink ) { maExpandedHdl = rLink; }
-    const Link& GetExpandedHdl() const { return maExpandedHdl; }
+    void  SetExpandedHdl( const Link<>& rLink ) { maExpandedHdl = rLink; }
+    const Link<>& GetExpandedHdl() const { return maExpandedHdl; }
 protected:
     virtual Size calculateRequisition() const SAL_OVERRIDE;
     virtual void setAllocation(const Size &rAllocation) SAL_OVERRIDE;
 private:
     bool m_bResizeTopLevel;
     VclPtr<DisclosureButton> m_pDisclosureButton;
-    Link maExpandedHdl;
+    Link<> maExpandedHdl;
     DECL_DLLPRIVATE_LINK(ClickHdl, DisclosureButton* pBtn);
 };