5 #ifndef BITCOIN_UTIL_RESULT_H
6 #define BITCOIN_UTIL_RESULT_H
38 using T = std::conditional_t<std::is_same_v<M, void>, std::monostate,
M>;
42 template <
typename FT>
47 Result(
T obj) : m_variant{
std::in_place_index_t<1>{}, std::move(obj)} {}
52 bool has_value() const noexcept {
return m_variant.index() == 1; }
56 return std::get<1>(m_variant);
61 return std::get<1>(m_variant);
66 return has_value() ? value() : std::forward<U>(default_value);
71 return has_value() ? std::move(value()) : std::forward<U>(default_value);
73 explicit operator bool() const noexcept {
return has_value(); }
T value_or(U &&default_value) const &
const T & value() const LIFETIMEBOUND
T & operator*() LIFETIMEBOUND
T & value() LIFETIMEBOUND
bool has_value() const noexcept
std::optional methods, so functions returning optional<T> can change to return Result<T> with minimal...
T * operator->() LIFETIMEBOUND
const T & operator*() const LIFETIMEBOUND
T value_or(U &&default_value) &&
friend bilingual_str ErrorString(const Result< FT > &result)
std::conditional_t< std::is_same_v< M, void >, std::monostate, M > T
std::variant< bilingual_str, T > m_variant
const T * operator->() const LIFETIMEBOUND
bool error(const char *fmt, const Args &... args)
bilingual_str ErrorString(const Result< T > &result)