template<typename T>
-typename EnableIf<HasFormattedOutput<T>::value, void>::Yes
+typename std::enable_if<HasFormattedOutput<T>::value>::type
operator<<(LexicalConverter &c, const T &v)
{
std::ostringstream ss;
}
template<typename T>
-typename EnableIf<HasFormattedInput<T>::value, void>::Yes
+typename std::enable_if<HasFormattedInput<T>::value>::type
operator>>(const LexicalConverter &c, T &v)
{
std::istringstream ss(c.get());