wxString::begin and end added

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2663 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -713,6 +713,10 @@ public:
 #ifdef  wxSTD_STRING_COMPATIBILITY
   // std::string compatibility functions
 
+  // standard types
+  typedef wxChar value_type;
+  typedef const value_type *const_iterator;
+
   // an 'invalid' value for string index
   static const size_t npos;
 
@@ -746,6 +750,11 @@ public:
     // returns the writable character at position n
   wxChar& at(size_t n) { return GetWritableChar(n); }
 
+    // first valid index position
+  const_iterator begin() const { return wx_str(); }
+    // position one after the last valid one
+  const_iterator end() const { return wx_str() + length(); }
+
   // lib.string.modifiers
     // append a string
   wxString& append(const wxString& str)