The specializations of hash is declared within the namespace beman

[YexuanXiao]

I noticed that lines 50 to 61 declare beman::hash and its specializations for cstring_view, while lines 371 to 390 define a set of specialization for std::hash. The former cannot be used because they lack definitions. Is this intentional?

cstring_view/include/beman/cstring_view/cstring_view.hpp

Lines 49 to 61 in 097c505

	// [cstring.view.hash], hash support
	template <class T>
	struct hash;
	template <>
	struct hash<cstring_view>;
	template <>
	struct hash<u8cstring_view>;
	template <>
	struct hash<u16cstring_view>;
	template <>
	struct hash<u32cstring_view>;
	template <>
	struct hash<wcstring_view>;

cstring_view/include/beman/cstring_view/cstring_view.hpp

Lines 371 to 390 in 097c505

	template <>
	struct std::hash<beman::cstring_view> {
	auto operator()(const beman::cstring_view& sv) const noexcept { return std::hash<string_view>{}(sv); }
	};
	template <>
	struct std::hash<beman::u8cstring_view> {
	auto operator()(const beman::u8cstring_view& sv) const noexcept { return std::hash<u8string_view>{}(sv); }
	};
	template <>
	struct std::hash<beman::u16cstring_view> {
	auto operator()(const beman::u16cstring_view& sv) const noexcept { return std::hash<u16string_view>{}(sv); }
	};
	template <>
	struct std::hash<beman::u32cstring_view> {
	auto operator()(const beman::u32cstring_view& sv) const noexcept { return std::hash<u32string_view>{}(sv); }
	};
	template <>
	struct std::hash<beman::wcstring_view> {
	auto operator()(const beman::wcstring_view& sv) const noexcept { return std::hash<wstring_view>{}(sv); }
	};