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std::chrono::nonexistent_local_time

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class nonexistent_local_time;
 ( C++20)

, , , std::chrono::local_time std::chrono::sys_time std::chrono::choose (, choose::earliest choose::latest).

std::chrono::time_zone::to_sys (, std::chrono::zoned_time, std::chrono::local_time).

std-chrono-nonexistent_local_time-inheritance.svg [std-chrono-nonexistent_local_time-inheritance.svg]

-

()
(public -)
operator=
(public -)
what
(public -)

std::chrono::nonexistent_local_time::nonexistent_local_time

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template< class Duration > nonexistent_local_time( const std::chrono::local_time<Duration>& tp, const std::chrono::local_info& i );
 (1) ( C++20)
nonexistent_local_time( const nonexistent_local_time& other ) noexcept;
 (2) ( C++20)

.

1) , what(), , os.str() :
std::ostringstream os;
os << tp << "    \n"
   << std::chrono::local_seconds(i.first.end.time_since_epoch()) + i.first.offset 
   << ' ' << i.first.abbrev << " \n"
   << std::chrono::local_seconds(i.second.begin.time_since_epoch()) + i.second.offset
   << ' ' << i.second.abbrev
   << "   \n"
   << i.first.end << " UTC";
, i.result != std::chrono::local_info::nonexistent.
2) . *this other std::chrono::nonexistent_local_time, std::strcmp(what(), other.what()) == 0.

tp ,
i std::chrono::local_info,
other nonexistent_local_time

std::bad_alloc

, std::exception, , .

std::chrono::nonexistent_locale_time::operator=

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nonexistent_locale_time& operator=( const nonexistent_locale_time& other ) noexcept;
 ( C++20)

other. *this other std::chrono::nonexistent_locale_time, std::strcmp(what(), other.what()) == 0 .

other

*this

std::chrono::nonexistent_locale_time::what

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virtual const char* what() const noexcept;
 ( C++20)

.

()

. std::wstring. , , , , , - (, ) .

, what().

std::runtime_error


std::exception

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[virtual]
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() []
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