Use macros to define default copy constructor and assignment operator

docs/doxygen/mainpages/const_cpp.h

@@ -172,8 +172,7 @@ Currently the following symbols exist:
 @itemdef{wxHAS_CONFIG_TEMPLATE_RW, Defined if the currently used compiler
     supports template Read() and Write() methods in wxConfig.}
 @itemdef{wxHAS_MEMBER_DEFAULT, Defined if the currently used compiler supports
-    C++11 @c =default. @c wxMEMBER_DEFAULT is defined as this keyword in this
-    case, and as nothing otherwise.}
+    C++11 @c =default.}
 @itemdef{wxHAS_LARGE_FILES, Defined if wxFile supports files more than 4GB in
     size (notice that you must include @c wx/filefn.h before testing for this
     symbol).}

include/wx/animate.h

@@ -38,10 +38,7 @@ public:
     wxAnimation();
     explicit wxAnimation(const wxString &name, wxAnimationType type = wxANIMATION_TYPE_ANY);
 
-#ifdef wxHAS_MEMBER_DEFAULT
-    wxAnimation(const wxAnimation&) wxMEMBER_DEFAULT;
-    wxAnimation& operator=(const wxAnimation&) wxMEMBER_DEFAULT;
-#endif
+    wxDECLARE_DEFAULT_COPY_CLASS(wxAnimation);
 
     bool IsOk() const;
     bool IsCompatibleWith(wxClassInfo* ci) const;

include/wx/defs.h

@@ -290,13 +290,10 @@ typedef short int WXTYPE;
    still requires handling MSVS specially, unfortunately) */
 #if __cplusplus >= 201103L || wxCHECK_VISUALC_VERSION(14)
     #define wxHAS_MEMBER_DEFAULT
-    #define wxMEMBER_DEFAULT = default
 
     #define wxHAS_NOEXCEPT
     #define wxNOEXCEPT noexcept
 #else
-    #define wxMEMBER_DEFAULT
-
     #define wxNOEXCEPT
 #endif
 
@@ -3042,6 +3039,22 @@ typedef const void* WXWidget;
 #define DECLARE_NO_ASSIGN_CLASS(classname) \
     wxDECLARE_NO_ASSIGN_CLASS(classname);
 
+/*  --------------------------------------------------------------------------- */
+/*  macros to define a class with default copy constructor and/or assignment operator */
+/*  --------------------------------------------------------------------------- */
+
+#ifdef wxHAS_MEMBER_DEFAULT
+#define wxDECLARE_DEFAULT_COPY_CTOR(classname) \
+    classname(const classname&) = default
+
+#define wxDECLARE_DEFAULT_COPY_CLASS(classname) \
+    wxDECLARE_DEFAULT_COPY_CTOR(classname); \
+    classname& operator=(const classname&) = default
+#else
+#define wxDECLARE_DEFAULT_COPY_CTOR(classname)
+#define wxDECLARE_DEFAULT_COPY_CLASS(classname)
+#endif
+
 /*  --------------------------------------------------------------------------- */
 /*  If a manifest is being automatically generated, add common controls 6 to it */
 /*  --------------------------------------------------------------------------- */

include/wx/unichar.h

@@ -267,9 +267,7 @@ public:
     wxUniCharRef& operator=(const wxUniCharRef& c)
         { if (&c != this) *this = c.UniChar(); return *this; }
 
-#ifdef wxHAS_MEMBER_DEFAULT
-    wxUniCharRef(const wxUniCharRef&) wxMEMBER_DEFAULT;
-#endif
+    wxDECLARE_DEFAULT_COPY_CTOR(wxUniCharRef);
 
 #define wxUNICHAR_REF_DEFINE_OPERATOR_EQUAL(type) \
     wxUniCharRef& operator=(type c) { return *this = wxUniChar(c); }

interface/wx/defs.h

@@ -1561,6 +1561,22 @@ typedef double wxDouble;
  */
 #define wxDECLARE_NO_COPY_TEMPLATE_CLASS_2(classname, arg1, arg2)
 
+/**
+    This macro can be used in a class declaration to enable declaring the
+    default copy constructor and assignment operator.
+
+    @since 3.1.4
+ */
+#define wxDECLARE_DEFAULT_COPY_CLASS(classname)
+
+/**
+    This macro can be used in a class declaration to enable declaring the
+    default copy constructor.
+
+    @since 3.1.4
+ */
+#define wxDECLARE_DEFAULT_COPY_CTOR(classname)
+
 /**
     A function which deletes and nulls the pointer.