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add more useful operator<<

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This commit is contained in:
terik23 2019-04-23 17:47:05 +05:00
parent 2aba428d7a
commit 6698de1bc7
1 changed files with 11 additions and 7 deletions
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18
include/magic_enum.hpp
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@ -323,24 +323,28 @@ template <typename E, typename = detail::enable_if_enum_t<E>>
namespace ops {
template <typename E, typename D = std::decay_t<E>, typename = detail::enable_if_enum_t<E>>
std::ostream& operator<<(std::ostream& os, E value) {
template <class Char, class Traits, typename E, typename D = std::decay_t<E>, typename = detail::enable_if_enum_t<E>>
std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& os, E value) {
static_assert(std::is_enum_v<D>, "magic_enum::ops::operator<< requires enum type.");
if (auto name = detail::name_impl<D>(static_cast<int>(value)); !name.empty()) {
os << name;
for (auto c : name) {
os.put(c);
}
}
return os;
}
template <typename E, typename = detail::enable_if_enum_t<E>>
std::ostream& operator<<(std::ostream& os, std::optional<E> value) {
template <class Char, class Traits, typename E, typename D = std::decay_t<E>, typename = detail::enable_if_enum_t<E>>
std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& os, std::optional<E> value) {
static_assert(std::is_enum_v<E>, "magic_enum::ops::operator<< requires enum type.");
if (value.has_value()) {
if (auto name = detail::name_impl<E>(static_cast<int>(value.value())); !name.empty()) {
os << name;
if (auto name = detail::name_impl<D>(static_cast<int>(value.value())); !name.empty()) {
for (auto c : name) {
os.put(c);
}
}
}