Specified a default value for the template argument of parse_config_file.

Author: emreturkay

include/boost/program_options/parsers.hpp

@@ -190,7 +190,11 @@ namespace boost { namespace program_options {
         Read from file with the given name. The character type is
         passed to the file stream.
     */
+#ifdef BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
     template<class charT>
+#else
+    template<class charT = char>
+#endif
 #if ! BOOST_WORKAROUND(__ICL, BOOST_TESTED_AT(700))
     BOOST_PROGRAM_OPTIONS_DECL
 #endif

src/parsers.cpp

@@ -140,7 +140,11 @@ namespace boost { namespace program_options {
                       bool allow_unregistered);
 #endif
 
+#ifdef BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS
     template<class charT>
+#else
+    template<class charT = char>
+#endif
     basic_parsed_options<charT>
     parse_config_file(const char* filename, 
                       const options_description& desc,