boost::urls::string_token::see_below::is_token<T, void_t<decltype(pass:[std::declval<T&>().prepare(

Metafunction returning true if T is a StringToken

Synopsis

template<class T>
struct is_token<T, void_t<decltype(std::declval().prepare(
                                    std::declval())), decltype(std::declval().result())>>
    : std::integral_constant<bool, std::is_convertible().result()), typename T::result_type>::value && std::is_same().prepare(0)), char *>::value && std::is_base_of::value && std::is_convertible::value>;

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