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tomlankhorst/decay_optional.hpp

Created April 14, 2021 07:40
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Decay optional type
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decay_optional.hpp
template<typename T>
struct decay_optional {
using type = T;
};
template<typename T>
struct decay_optional<std::optional<T>> {
using type = T;
};
template<typename T>
struct decay_optional<boost::optional<T>> {
using type = T;
};
template<typename T>
using decay_optional_t = typename decay_optional<T>::type;
static_assert(std::is_same_v<decay_optional_t<std::byte>, std::byte>);
static_assert(std::is_same_v<decay_optional_t<std::optional<std::byte>>, std::byte>);
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