Answer by Tiger Hwang for C++14 Variable Templates: what is their purpose? Any usage example?

I have a use case here.

template<typename CT> constexpr CT MARK = '%';template<> constexpr wchar_t MARK<wchar_t> = L'%';

which are used in a string processing template.`

template <typename CT> void ProcessString(const std::basic_string<CT>& str){    auto&& markpos = str.find(MARK<CT>);    ...}