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refactor: simplify last_one_in_pack meta func

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ToruNiina
2021-04-14 13:09:25 +09:00
parent ba3d41d913
commit 5518b2b155
1 changed files with 2 additions and 5 deletions
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7
toml/utility.hpp
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@@ -117,10 +117,8 @@ decltype(auto) last_one(T&& /*head*/, Ts&& ... tail) noexcept
// line #3, so `decltype()` cannot deduce the type returned from `last_one`. // line #3, so `decltype()` cannot deduce the type returned from `last_one`.
// So we need to determine return type in a different way, like a meta func. // So we need to determine return type in a different way, like a meta func.
template<typename ... Ts>
struct last_one_in_pack;
template<typename T, typename ... Ts> template<typename T, typename ... Ts>
struct last_one_in_pack<T, Ts...> struct last_one_in_pack
{ {
using type = typename last_one_in_pack<Ts...>::type; using type = typename last_one_in_pack<Ts...>::type;
}; };
@@ -137,9 +135,8 @@ T&& last_one(T&& tail) noexcept
{ {
return std::forward<T>(tail); return std::forward<T>(tail);
} }
template<typename T, typename ... Ts> template<typename T, typename ... Ts>
last_one_in_pack_t<Ts&& ...> enable_if_t<(sizeof...(Ts) > 0), last_one_in_pack_t<Ts&& ...>>
last_one(T&& /*head*/, Ts&& ... tail) last_one(T&& /*head*/, Ts&& ... tail)
{ {
return last_one(std::forward<Ts>(tail)...); return last_one(std::forward<Ts>(tail)...);