Add wxNOEXCEPT and use it for std::streambuf-derived classes.

This fixes warnings from Intel compiler about overriding function using a
different exception specification than the base one and also incidentally
provides a handy macro that can be useful in other situations.

Closes #14826.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72978 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -3335,6 +3335,17 @@ typedef const void* WXWidget;
 #define DECLARE_NO_ASSIGN_CLASS(classname) \
     wxDECLARE_NO_ASSIGN_CLASS(classname);
 
+/* Macro that can be used to indicate that a function doesn't throw. */
+#if defined(__cplusplus) && __cplusplus >= 199711L /* C++98 */
+#   if __cplusplus >= 201103L /* >= C++11 */
+#       define wxNOEXCEPT   noexcept
+#   else
+#       define wxNOEXCEPT   throw()
+#   endif
+#else
+#   define wxNOEXCEPT
+#endif
+
 /*  --------------------------------------------------------------------------- */
 /*  If a manifest is being automatically generated, add common controls 6 to it */
 /*  --------------------------------------------------------------------------- */

include/wx/msw/textctrl.h

@@ -31,7 +31,7 @@ public:
 
         Create(parent, id, value, pos, size, style, validator, name);
     }
-    virtual ~wxTextCtrl();
+    virtual ~wxTextCtrl() wxNOEXCEPT;
 
     bool Create(wxWindow *parent, wxWindowID id,
                 const wxString& value = wxEmptyString,

include/wx/stdstream.h

@@ -28,7 +28,7 @@ class WXDLLIMPEXP_BASE wxStdInputStreamBuffer : public std::streambuf
 {
 public:
     wxStdInputStreamBuffer(wxInputStream& stream);
-    virtual ~wxStdInputStreamBuffer() { }
+    virtual ~wxStdInputStreamBuffer() wxNOEXCEPT { }
 
 protected:
     virtual std::streambuf *setbuf(char *s, std::streamsize n);
@@ -71,7 +71,7 @@ class WXDLLIMPEXP_BASE wxStdInputStream : public std::istream
 {
 public:
     wxStdInputStream(wxInputStream& stream);
-    virtual ~wxStdInputStream() { }
+    virtual ~wxStdInputStream() wxNOEXCEPT { }
 
 protected:
     wxStdInputStreamBuffer m_streamBuffer;
@@ -85,7 +85,7 @@ class WXDLLIMPEXP_BASE wxStdOutputStreamBuffer : public std::streambuf
 {
 public:
     wxStdOutputStreamBuffer(wxOutputStream& stream);
-    virtual ~wxStdOutputStreamBuffer() { }
+    virtual ~wxStdOutputStreamBuffer() wxNOEXCEPT { }
 
 protected:
     virtual std::streambuf *setbuf(char *s, std::streamsize n);
@@ -112,7 +112,7 @@ class WXDLLIMPEXP_BASE wxStdOutputStream : public std::ostream
 {
 public:
     wxStdOutputStream(wxOutputStream& stream);
-    virtual ~wxStdOutputStream() { }
+    virtual ~wxStdOutputStream() wxNOEXCEPT { }
 
 protected:
     wxStdOutputStreamBuffer m_streamBuffer;

include/wx/textctrl.h

@@ -679,7 +679,7 @@ public:
     // --------
 
     wxTextCtrlBase() { }
-    virtual ~wxTextCtrlBase() { }
+    virtual ~wxTextCtrlBase() wxNOEXCEPT { }
 
 
     // more readable flag testing methods