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