Add wxTextOutputStream::Write<>().

The new method allows to write into wxTextOutputStream anything that can be
streamed into wxString and allows to simplify the existing code.

include/wx/txtstrm.h

@@ -123,6 +123,15 @@ public:
     void SetMode( wxEOL mode = wxEOL_NATIVE );
     wxEOL GetMode() { return m_mode; }
 
+    template<typename T>
+    void Write(const T& i)
+    {
+        wxString str;
+        str << i;
+
+        WriteString(str);
+    }
+
     void Write64(wxUint64 i);
     void Write32(wxUint32 i);
     void Write16(wxUint16 i);

interface/wx/txtstrm.h

@@ -300,6 +300,14 @@ public:
     */
     void SetMode(wxEOL mode = wxEOL_NATIVE);
 
+    /**
+        Writes @a i to the stream using wxString::operator<<().
+
+        @since 3.1.0
+    */
+    template<typename T>
+    void Write(const T& i);
+
     /**
         Writes the 64 bit integer @a i64 to the stream.
 

src/common/txtstrm.cpp

@@ -526,63 +526,55 @@ wxTextOutputStream& wxTextOutputStream::operator<<(wchar_t wc)
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt16 c)
 {
-    wxString str;
+    Write(c);
-    str.Printf(wxT("%d"), (signed int)c);
-    WriteString(str);
 
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt32 c)
 {
-    wxString str;
+    Write(c);
-    str.Printf(wxT("%ld"), (signed long)c);
-    WriteString(str);
 
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxInt64 c)
 {
-    WriteString(wxString::Format("%" wxLongLongFmtSpec "d", c));
+    Write(c);
 
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint16 c)
 {
-    wxString str;
+    Write(c);
-    str.Printf(wxT("%u"), (unsigned int)c);
-    WriteString(str);
 
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint32 c)
 {
-    wxString str;
+    Write(c);
-    str.Printf(wxT("%lu"), (unsigned long)c);
-    WriteString(str);
 
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(wxUint64 c)
 {
-    WriteString(wxString::Format("%" wxLongLongFmtSpec "u", c));
+    Write(c);
 
     return *this;
 }
 
 wxTextOutputStream &wxTextOutputStream::operator<<(double f)
 {
-    WriteDouble(f);
+    Write(f);
     return *this;
 }
 
 wxTextOutputStream& wxTextOutputStream::operator<<(float f)
 {
-    WriteDouble((double)f);
+    Write(f);
     return *this;
 }