support for simulating focus events since not all controls can be focused

[wxWidgets.git] / include / wx / scopeguard.h

diff --git a/include/wx/scopeguard.h b/include/wx/scopeguard.h
index c46f4435699c98172bddcf75c7aa16c5e8d28812..434c89768d58d4ed29d12fe1476e3c15b9630d9e 100644 (file)
--- a/include/wx/scopeguard.h
+++ b/include/wx/scopeguard.h
@@ -11,8 +11,9 @@
 
 /*
     Acknowledgements: this header is heavily based on (well, almost the exact
 
 /*
     Acknowledgements: this header is heavily based on (well, almost the exact

-    copy of) wxScopeGuard.h by Andrei Alexandrescu and Petru Marginean published
+    copy of) ScopeGuard.h by Andrei Alexandrescu and Petru Marginean published

     in December 2000 issue of C/C++ Users Journal.
     in December 2000 issue of C/C++ Users Journal.

+    http://www.cuj.com/documents/cujcexp1812alexandr/

  */
 
 #ifndef _WX_SCOPEGUARD_H_
  */
 
 #ifndef _WX_SCOPEGUARD_H_


@@ -26,12 +27,36 @@
 // helpers
 // ----------------------------------------------------------------------------
 
 // helpers
 // ----------------------------------------------------------------------------
 

+#ifdef __WATCOMC__
+
+// WATCOM-FIXME: C++ of Open Watcom 1.3 doesn't like OnScopeExit() created
+// through template so it must be workarounded with dedicated inlined macro.
+// For compatibility with Watcom compilers wxPrivate::OnScopeExit must be
+// replaced with wxPrivateOnScopeExit but in user code (for everyone who
+// doesn't care about OW compatibility) wxPrivate::OnScopeExit still works.
+
+#define wxPrivateOnScopeExit(guard)          \
+    {                                        \
+        if ( !(guard).WasDismissed() )       \
+        {                                    \
+            wxTRY                            \
+            {                                \
+                (guard).Execute();           \
+            }                                \
+            wxCATCH_ALL(;)                   \
+        }                                    \
+    }
+
+#define wxPrivateUse(n) wxUnusedVar(n)
+
+#else
+

 namespace wxPrivate
 {
     // in the original implementation this was a member template function of
     // ScopeGuardImplBase but gcc 2.8 which is still used for OS/2 doesn't
     // support member templates and so we must make it global
 namespace wxPrivate
 {
     // in the original implementation this was a member template function of
     // ScopeGuardImplBase but gcc 2.8 which is still used for OS/2 doesn't
     // support member templates and so we must make it global

-    template <typename ScopeGuardImpl>
+    template <class ScopeGuardImpl>

     void OnScopeExit(ScopeGuardImpl& guard)
     {
         if ( !guard.WasDismissed() )
     void OnScopeExit(ScopeGuardImpl& guard)
     {
         if ( !guard.WasDismissed() )


@@ -46,12 +71,17 @@ namespace wxPrivate
     }
 
     // just to avoid the warning about unused variables
     }
 
     // just to avoid the warning about unused variables

-    template <typename T>
+    template <class T>

     void Use(const T& WXUNUSED(t))
     {
     }
 } // namespace wxPrivate
 
     void Use(const T& WXUNUSED(t))
     {
     }
 } // namespace wxPrivate
 

+#define wxPrivateOnScopeExit(n) wxPrivate::OnScopeExit(n)
+#define wxPrivateUse(n) wxPrivate::Use(n)
+
+#endif
+

 // ============================================================================
 // wxScopeGuard for functions and functors
 // ============================================================================
 // ============================================================================
 // wxScopeGuard for functions and functors
 // ============================================================================


@@ -65,20 +95,20 @@ class wxScopeGuardImplBase
 public:
     wxScopeGuardImplBase() : m_wasDismissed(false) { }
 
 public:
     wxScopeGuardImplBase() : m_wasDismissed(false) { }
 

+    wxScopeGuardImplBase(const wxScopeGuardImplBase& other)
+        : m_wasDismissed(other.m_wasDismissed)
+    {
+        other.Dismiss();
+    }
+

     void Dismiss() const { m_wasDismissed = true; }
 
     void Dismiss() const { m_wasDismissed = true; }
 

-    // for OnScopeExit() only we can't make it friend, unfortunately)!
+    // for OnScopeExit() only (we can't make it friend, unfortunately)!

     bool WasDismissed() const { return m_wasDismissed; }
 
 protected:
     ~wxScopeGuardImplBase() { }
 
     bool WasDismissed() const { return m_wasDismissed; }
 
 protected:
     ~wxScopeGuardImplBase() { }
 

-    wxScopeGuardImplBase(const wxScopeGuardImplBase& other)
-        : m_wasDismissed(other.m_wasDismissed)
-    {
-        other.Dismiss();
-    }
-

     // must be mutable for copy ctor to work
     mutable bool m_wasDismissed;
 
     // must be mutable for copy ctor to work
     mutable bool m_wasDismissed;
 


@@ -86,11 +116,14 @@ private:
     wxScopeGuardImplBase& operator=(const wxScopeGuardImplBase&);
 };
 
     wxScopeGuardImplBase& operator=(const wxScopeGuardImplBase&);
 };
 

+// wxScopeGuard is just a reference, see the explanation in CUJ article
+typedef const wxScopeGuardImplBase& wxScopeGuard;
+

 // ----------------------------------------------------------------------------
 // wxScopeGuardImpl0: scope guard for actions without parameters
 // ----------------------------------------------------------------------------
 
 // ----------------------------------------------------------------------------
 // wxScopeGuardImpl0: scope guard for actions without parameters
 // ----------------------------------------------------------------------------
 

-template <typename F>
+template <class F>

 class wxScopeGuardImpl0 : public wxScopeGuardImplBase
 {
 public:
 class wxScopeGuardImpl0 : public wxScopeGuardImplBase
 {
 public:


@@ -99,7 +132,7 @@ public:
         return wxScopeGuardImpl0<F>(fun);
     }
 
         return wxScopeGuardImpl0<F>(fun);
     }
 

-    ~wxScopeGuardImpl0() { wxPrivate::OnScopeExit(*this); }
+    ~wxScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }

 
     void Execute() { m_fun(); }
 
 
     void Execute() { m_fun(); }
 


@@ -111,7 +144,7 @@ protected:
     wxScopeGuardImpl0& operator=(const wxScopeGuardImpl0&);
 };
 
     wxScopeGuardImpl0& operator=(const wxScopeGuardImpl0&);
 };
 

-template <typename F>
+template <class F>

 inline wxScopeGuardImpl0<F> wxMakeGuard(F fun)
 {
     return wxScopeGuardImpl0<F>::MakeGuard(fun);
 inline wxScopeGuardImpl0<F> wxMakeGuard(F fun)
 {
     return wxScopeGuardImpl0<F>::MakeGuard(fun);


@@ -121,7 +154,7 @@ inline wxScopeGuardImpl0<F> wxMakeGuard(F fun)
 // wxScopeGuardImpl1: scope guard for actions with 1 parameter
 // ----------------------------------------------------------------------------
 
 // wxScopeGuardImpl1: scope guard for actions with 1 parameter
 // ----------------------------------------------------------------------------
 

-template <typename F, typename P1>
+template <class F, class P1>

 class wxScopeGuardImpl1 : public wxScopeGuardImplBase
 {
 public:
 class wxScopeGuardImpl1 : public wxScopeGuardImplBase
 {
 public:


@@ -130,7 +163,7 @@ public:
         return wxScopeGuardImpl1<F, P1>(fun, p1);
     }
 
         return wxScopeGuardImpl1<F, P1>(fun, p1);
     }
 

-    ~wxScopeGuardImpl1() { wxPrivate::OnScopeExit(*this); }
+    ~wxScopeGuardImpl1() { wxPrivateOnScopeExit(* this); }

 
     void Execute() { m_fun(m_p1); }
 
 
     void Execute() { m_fun(m_p1); }
 


@@ -143,7 +176,7 @@ protected:
     wxScopeGuardImpl1& operator=(const wxScopeGuardImpl1&);
 };
 
     wxScopeGuardImpl1& operator=(const wxScopeGuardImpl1&);
 };
 

-template <typename F, typename P1>
+template <class F, class P1>

 inline wxScopeGuardImpl1<F, P1> wxMakeGuard(F fun, P1 p1)
 {
     return wxScopeGuardImpl1<F, P1>::MakeGuard(fun, p1);
 inline wxScopeGuardImpl1<F, P1> wxMakeGuard(F fun, P1 p1)
 {
     return wxScopeGuardImpl1<F, P1>::MakeGuard(fun, p1);


@@ -153,7 +186,7 @@ inline wxScopeGuardImpl1<F, P1> wxMakeGuard(F fun, P1 p1)
 // wxScopeGuardImpl2: scope guard for actions with 2 parameters
 // ----------------------------------------------------------------------------
 
 // wxScopeGuardImpl2: scope guard for actions with 2 parameters
 // ----------------------------------------------------------------------------
 

-template <typename F, typename P1, typename P2>
+template <class F, class P1, class P2>

 class wxScopeGuardImpl2 : public wxScopeGuardImplBase
 {
 public:
 class wxScopeGuardImpl2 : public wxScopeGuardImplBase
 {
 public:


@@ -162,7 +195,7 @@ public:
         return wxScopeGuardImpl2<F, P1, P2>(fun, p1, p2);
     }
 
         return wxScopeGuardImpl2<F, P1, P2>(fun, p1, p2);
     }
 

-    ~wxScopeGuardImpl2() { wxPrivate::OnScopeExit(*this); }
+    ~wxScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }

 
     void Execute() { m_fun(m_p1, m_p2); }
 
 
     void Execute() { m_fun(m_p1, m_p2); }
 


@@ -176,12 +209,47 @@ protected:
     wxScopeGuardImpl2& operator=(const wxScopeGuardImpl2&);
 };
 
     wxScopeGuardImpl2& operator=(const wxScopeGuardImpl2&);
 };
 

-template <typename F, typename P1, typename P2>
+template <class F, class P1, class P2>

 inline wxScopeGuardImpl2<F, P1, P2> wxMakeGuard(F fun, P1 p1, P2 p2)
 {
     return wxScopeGuardImpl2<F, P1, P2>::MakeGuard(fun, p1, p2);
 }
 
 inline wxScopeGuardImpl2<F, P1, P2> wxMakeGuard(F fun, P1 p1, P2 p2)
 {
     return wxScopeGuardImpl2<F, P1, P2>::MakeGuard(fun, p1, p2);
 }
 

+// ----------------------------------------------------------------------------
+// wxScopeGuardImpl3: scope guard for actions with 3 parameters
+// ----------------------------------------------------------------------------
+
+template <class F, class P1, class P2, class P3>
+class wxScopeGuardImpl3 : public wxScopeGuardImplBase
+{
+public:
+    static wxScopeGuardImpl3<F, P1, P2, P3> MakeGuard(F fun, P1 p1, P2 p2, P3 p3)
+    {
+        return wxScopeGuardImpl3<F, P1, P2, P3>(fun, p1, p2, p3);
+    }
+
+    ~wxScopeGuardImpl3() { wxPrivateOnScopeExit(*this); }
+
+    void Execute() { m_fun(m_p1, m_p2, m_p3); }
+
+protected:
+    wxScopeGuardImpl3(F fun, P1 p1, P2 p2, P3 p3)
+        : m_fun(fun), m_p1(p1), m_p2(p2), m_p3(p3) { }
+
+    F m_fun;
+    const P1 m_p1;
+    const P2 m_p2;
+    const P3 m_p3;
+
+    wxScopeGuardImpl3& operator=(const wxScopeGuardImpl3&);
+};
+
+template <class F, class P1, class P2, class P3>
+inline wxScopeGuardImpl3<F, P1, P2, P3> wxMakeGuard(F fun, P1 p1, P2 p2, P3 p3)
+{
+    return wxScopeGuardImpl3<F, P1, P2, P3>::MakeGuard(fun, p1, p2, p3);
+}
+

 // ============================================================================
 // wxScopeGuards for object methods
 // ============================================================================
 // ============================================================================
 // wxScopeGuards for object methods
 // ============================================================================


@@ -190,7 +258,7 @@ inline wxScopeGuardImpl2<F, P1, P2> wxMakeGuard(F fun, P1 p1, P2 p2)
 // wxObjScopeGuardImpl0
 // ----------------------------------------------------------------------------
 
 // wxObjScopeGuardImpl0
 // ----------------------------------------------------------------------------
 

-template <class Obj, typename MemFun>
+template <class Obj, class MemFun>

 class wxObjScopeGuardImpl0 : public wxScopeGuardImplBase
 {
 public:
 class wxObjScopeGuardImpl0 : public wxScopeGuardImplBase
 {
 public:


@@ -200,7 +268,7 @@ public:
         return wxObjScopeGuardImpl0<Obj, MemFun>(obj, memFun);
     }
 
         return wxObjScopeGuardImpl0<Obj, MemFun>(obj, memFun);
     }
 

-    ~wxObjScopeGuardImpl0() { wxPrivate::OnScopeExit(*this); }
+    ~wxObjScopeGuardImpl0() { wxPrivateOnScopeExit(*this); }

 
     void Execute() { (m_obj.*m_memfun)(); }
 
 
     void Execute() { (m_obj.*m_memfun)(); }
 


@@ -212,13 +280,13 @@ protected:
     MemFun m_memfun;
 };
 
     MemFun m_memfun;
 };
 

-template <class Obj, typename MemFun>
+template <class Obj, class MemFun>

 inline wxObjScopeGuardImpl0<Obj, MemFun> wxMakeObjGuard(Obj& obj, MemFun memFun)
 {
     return wxObjScopeGuardImpl0<Obj, MemFun>::MakeObjGuard(obj, memFun);
 }
 
 inline wxObjScopeGuardImpl0<Obj, MemFun> wxMakeObjGuard(Obj& obj, MemFun memFun)
 {
     return wxObjScopeGuardImpl0<Obj, MemFun>::MakeObjGuard(obj, memFun);
 }
 

-template <class Obj, typename MemFun, typename P1>
+template <class Obj, class MemFun, class P1>

 class wxObjScopeGuardImpl1 : public wxScopeGuardImplBase
 {
 public:
 class wxObjScopeGuardImpl1 : public wxScopeGuardImplBase
 {
 public:


@@ -228,7 +296,7 @@ public:
         return wxObjScopeGuardImpl1<Obj, MemFun, P1>(obj, memFun, p1);
     }
 
         return wxObjScopeGuardImpl1<Obj, MemFun, P1>(obj, memFun, p1);
     }
 

-    ~wxObjScopeGuardImpl1() { wxPrivate::OnScopeExit(*this); }
+    ~wxObjScopeGuardImpl1() { wxPrivateOnScopeExit(*this); }

 
     void Execute() { (m_obj.*m_memfun)(m_p1); }
 
 
     void Execute() { (m_obj.*m_memfun)(m_p1); }
 


@@ -241,14 +309,14 @@ protected:
     const P1 m_p1;
 };
 
     const P1 m_p1;
 };
 

-template <class Obj, typename MemFun, typename P1>
+template <class Obj, class MemFun, class P1>

 inline wxObjScopeGuardImpl1<Obj, MemFun, P1>
 wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1)
 {
     return wxObjScopeGuardImpl1<Obj, MemFun, P1>::MakeObjGuard(obj, memFun, p1);
 }
 
 inline wxObjScopeGuardImpl1<Obj, MemFun, P1>
 wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1)
 {
     return wxObjScopeGuardImpl1<Obj, MemFun, P1>::MakeObjGuard(obj, memFun, p1);
 }
 

-template <class Obj, typename MemFun, typename P1, typename P2>
+template <class Obj, class MemFun, class P1, class P2>

 class wxObjScopeGuardImpl2 : public wxScopeGuardImplBase
 {
 public:
 class wxObjScopeGuardImpl2 : public wxScopeGuardImplBase
 {
 public:


@@ -258,7 +326,7 @@ public:
         return wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>(obj, memFun, p1, p2);
     }
 
         return wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>(obj, memFun, p1, p2);
     }
 

-    ~wxObjScopeGuardImpl2() { wxPrivate::OnScopeExit(*this); }
+    ~wxObjScopeGuardImpl2() { wxPrivateOnScopeExit(*this); }

 
     void Execute() { (m_obj.*m_memfun)(m_p1, m_p2); }
 
 
     void Execute() { (m_obj.*m_memfun)(m_p1, m_p2); }
 


@@ -272,7 +340,7 @@ protected:
     const P2 m_p2;
 };
 
     const P2 m_p2;
 };
 

-template <class Obj, typename MemFun, typename P1, typename P2>
+template <class Obj, class MemFun, class P1, class P2>

 inline wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>
 wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
 {
 inline wxObjScopeGuardImpl2<Obj, MemFun, P1, P2>
 wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
 {


@@ -280,42 +348,204 @@ wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2)
                                             MakeObjGuard(obj, memFun, p1, p2);
 }
 
                                             MakeObjGuard(obj, memFun, p1, p2);
 }
 

+template <class Obj, class MemFun, class P1, class P2, class P3>
+class wxObjScopeGuardImpl3 : public wxScopeGuardImplBase
+{
+public:
+    static wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>
+        MakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
+    {
+        return wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>(obj, memFun, p1, p2, p3);
+    }
+
+    ~wxObjScopeGuardImpl3() { wxPrivateOnScopeExit(*this); }
+
+    void Execute() { (m_obj.*m_memfun)(m_p1, m_p2, m_p3); }
+
+protected:
+    wxObjScopeGuardImpl3(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
+        : m_obj(obj), m_memfun(memFun), m_p1(p1), m_p2(p2), m_p3(p3) { }
+
+    Obj& m_obj;
+    MemFun m_memfun;
+    const P1 m_p1;
+    const P2 m_p2;
+    const P3 m_p3;
+};
+
+template <class Obj, class MemFun, class P1, class P2, class P3>
+inline wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>
+wxMakeObjGuard(Obj& obj, MemFun memFun, P1 p1, P2 p2, P3 p3)
+{
+    return wxObjScopeGuardImpl3<Obj, MemFun, P1, P2, P3>::
+                                        MakeObjGuard(obj, memFun, p1, p2, p3);
+}
+
+// ----------------------------------------------------------------------------
+// wxVariableSetter: use the same technique as for wxScopeGuard to allow
+//                   setting a variable to some value on block exit
+// ----------------------------------------------------------------------------
+
+namespace wxPrivate
+{
+
+// empty class just to be able to define a reference to it
+class VariableSetterBase : public wxScopeGuardImplBase { };
+
+typedef const VariableSetterBase& VariableSetter;
+
+template <typename T, typename U>
+class VariableSetterImpl : public VariableSetterBase
+{
+public:
+    VariableSetterImpl(T& var, U value)
+        : m_var(var),
+          m_value(value)
+    {
+    }
+
+    ~VariableSetterImpl() { wxPrivateOnScopeExit(*this); }
+
+    void Execute() { m_var = m_value; }
+
+private:
+    T& m_var;
+    const U m_value;
+
+    // suppress the warning about assignment operator not being generated
+    VariableSetterImpl<T, U>& operator=(const VariableSetterImpl<T, U>&);
+};
+
+template <typename T>
+class VariableNullerImpl : public VariableSetterBase
+{
+public:
+    VariableNullerImpl(T& var)
+        : m_var(var)
+    {
+    }
+
+    ~VariableNullerImpl() { wxPrivateOnScopeExit(*this); }
+
+    void Execute() { m_var = NULL; }
+
+private:
+    T& m_var;
+
+    VariableNullerImpl<T>& operator=(const VariableNullerImpl<T>&);
+};
+
+} // namespace wxPrivate
+
+template <typename T, typename U>
+inline
+wxPrivate::VariableSetterImpl<T, U> wxMakeVarSetter(T& var, U value)
+{
+      return wxPrivate::VariableSetterImpl<T, U>(var, value);
+}
+
+// calling wxMakeVarSetter(ptr, NULL) doesn't work because U is deduced to be
+// "int" and subsequent assignment of "U" to "T *" fails, so provide a special
+// function for this special case
+template <typename T>
+inline
+wxPrivate::VariableNullerImpl<T> wxMakeVarNuller(T& var)
+{
+    return wxPrivate::VariableNullerImpl<T>(var);
+}
+

 // ============================================================================
 // ============================================================================

-// public stuff
+// macros for declaring unnamed scoped guards (which can't be dismissed)

 // ============================================================================
 
 // ============================================================================
 

-// wxScopeGuard is just a reference, see the explanation in CUJ article
-typedef const wxScopeGuardImplBase& wxScopeGuard;
-
-// when an unnamed scope guard is needed, the macros below may be used
-//

 // NB: the original code has a single (and much nicer) ON_BLOCK_EXIT macro
 //     but this results in compiler warnings about unused variables and I
 //     didn't find a way to work around this other than by having different
 // NB: the original code has a single (and much nicer) ON_BLOCK_EXIT macro
 //     but this results in compiler warnings about unused variables and I
 //     didn't find a way to work around this other than by having different

-//     macros with different names
+//     macros with different names or using a less natural syntax for passing
+//     the arguments (e.g. as Boost preprocessor sequences, which would mean
+//     having to write wxON_BLOCK_EXIT(fwrite, (buf)(size)(n)(fp)) instead of
+//     wxON_BLOCK_EXIT4(fwrite, buf, size, n, fp)).
+
+#define wxGuardName    wxMAKE_UNIQUE_NAME(wxScopeGuard)
+
+#define wxON_BLOCK_EXIT0_IMPL(n, f) \
+    wxScopeGuard n = wxMakeGuard(f); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT0(f) \
 #define wxON_BLOCK_EXIT0(f) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT0_IMPL(wxGuardName, f)

 
 

+#define wxON_BLOCK_EXIT_OBJ0_IMPL(n, o, m) \
+    wxScopeGuard n = wxMakeObjGuard(o, m); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT_OBJ0(o, m) \
 #define wxON_BLOCK_EXIT_OBJ0(o, m) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT_OBJ0_IMPL(wxGuardName, o, &m)
+
+#define wxON_BLOCK_EXIT_THIS0(m) \
+    wxON_BLOCK_EXIT_OBJ0(*this, m)
+

 
 

+#define wxON_BLOCK_EXIT1_IMPL(n, f, p1) \
+    wxScopeGuard n = wxMakeGuard(f, p1); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT1(f, p1) \
 #define wxON_BLOCK_EXIT1(f, p1) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f, p1); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT1_IMPL(wxGuardName, f, p1)

 
 

+#define wxON_BLOCK_EXIT_OBJ1_IMPL(n, o, m, p1) \
+    wxScopeGuard n = wxMakeObjGuard(o, m, p1); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT_OBJ1(o, m, p1) \
 #define wxON_BLOCK_EXIT_OBJ1(o, m, p1) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m, p1); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT_OBJ1_IMPL(wxGuardName, o, &m, p1)

 
 

+#define wxON_BLOCK_EXIT_THIS1(m, p1) \
+    wxON_BLOCK_EXIT_OBJ1(*this, m, p1)
+
+
+#define wxON_BLOCK_EXIT2_IMPL(n, f, p1, p2) \
+    wxScopeGuard n = wxMakeGuard(f, p1, p2); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT2(f, p1, p2) \
 #define wxON_BLOCK_EXIT2(f, p1, p2) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeGuard(f, p1, p2); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT2_IMPL(wxGuardName, f, p1, p2)

 
 

+#define wxON_BLOCK_EXIT_OBJ2_IMPL(n, o, m, p1, p2) \
+    wxScopeGuard n = wxMakeObjGuard(o, m, p1, p2); \
+    wxPrivateUse(n)

 #define wxON_BLOCK_EXIT_OBJ2(o, m, p1, p2) \
 #define wxON_BLOCK_EXIT_OBJ2(o, m, p1, p2) \

-    wxScopeGuard wxMAKE_UNIQUE_NAME(scopeGuard) = wxMakeObjGuard(o, m, p1, p2); \
-    wxPrivate::Use(wxMAKE_UNIQUE_NAME(scopeGuard))
+    wxON_BLOCK_EXIT_OBJ2_IMPL(wxGuardName, o, &m, p1, p2)

 
 

-#endif // _WX_SCOPEGUARD_H_
+#define wxON_BLOCK_EXIT_THIS2(m, p1, p2) \
+    wxON_BLOCK_EXIT_OBJ2(*this, m, p1, p2)
+
+
+#define wxON_BLOCK_EXIT3_IMPL(n, f, p1, p2, p3) \
+    wxScopeGuard n = wxMakeGuard(f, p1, p2, p3); \
+    wxPrivateUse(n)
+#define wxON_BLOCK_EXIT3(f, p1, p2, p3) \
+    wxON_BLOCK_EXIT3_IMPL(wxGuardName, f, p1, p2, p3)
+
+#define wxON_BLOCK_EXIT_OBJ3_IMPL(n, o, m, p1, p2, p3) \
+    wxScopeGuard n = wxMakeObjGuard(o, m, p1, p2, p3); \
+    wxPrivateUse(n)
+#define wxON_BLOCK_EXIT_OBJ3(o, m, p1, p2, p3) \
+    wxON_BLOCK_EXIT_OBJ3_IMPL(wxGuardName, o, &m, p1, p2, p3)
+
+#define wxON_BLOCK_EXIT_THIS3(m, p1, p2, p3) \
+    wxON_BLOCK_EXIT_OBJ3(*this, m, p1, p2, p3)

 
 

+
+#define wxSetterName wxMAKE_UNIQUE_NAME(wxVarSetter)
+
+#define wxON_BLOCK_EXIT_SET_IMPL(n, var, value) \
+    wxPrivate::VariableSetter n = wxMakeVarSetter(var, value); \
+    wxPrivateUse(n)
+
+#define wxON_BLOCK_EXIT_SET(var, value) \
+    wxON_BLOCK_EXIT_SET_IMPL(wxSetterName, var, value)
+
+#define wxON_BLOCK_EXIT_NULL_IMPL(n, var) \
+    wxPrivate::VariableSetter n = wxMakeVarNuller(var); \
+    wxPrivateUse(n)
+
+#define wxON_BLOCK_EXIT_NULL(ptr) \
+    wxON_BLOCK_EXIT_NULL_IMPL(wxSetterName, ptr)
+
+#endif // _WX_SCOPEGUARD_H_