std::chrono::ambiguous_local_time (3) - Linux Manuals
Defined in header <chrono>
class ambiguous_local_time; (since C++20)
Defines a type of object to be thrown as exception to report that an attempt was made to convert a ambiguous std::chrono::local_time to a std::chrono::sys_time without specifying a std::chrono::choose (such as choose::earliest or choose::latest).
This exception is thrown by std::chrono::time_zone::to_sys and functions that call it (such as the constructors of std::chrono::zoned_time that takes a std::chrono::local_time).
std-chrono-ambiguous local time-inheritance.svg
constructor (public member function)
template< class Duration >
ambiguous_local_time(const std::chrono::local_time<Duration>& tp,
const std::chrono::local_info& i);
Constructs the exception object. The explanatory string returned by what() is equivalent to that produced by os.str() after the following code:
Because copying a standard library class derived from std::exception is not permitted to throw exceptions, this message is typically stored internally as a separately-allocated reference-counted string.
The behavior is undefined if i.result != std::chrono::local_info::ambiguous.
tp - the time point for which conversion was attempted
i - a std::chrono::local_info describing the result of the conversion attempt
May throw std::bad_alloc
Inherited from std::exception
destructor destroys the exception object
what returns an explanatory string