std::chrono::ambiguous_local_time
Defined in header <chrono>
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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).
Inheritance diagram
Member functions
(constructor) |
constructs the exception object (public member function) |
std::chrono::ambiguous_local_time::ambiguous_local_time
template< class Duration > ambiguous_local_time(const std::chrono::local_time<Duration>& tp, |
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Constructs the exception object. The explanatory string returned by what()
is equivalent to that produced by os.str()
after the following code:
std::ostringstream os; os << tp << " is ambiguous. It could be\n" << tp << ' ' << i.first.abbrev << " == " << tp - i.first.offset << " UTC or\n" << tp << ' ' << i.second.abbrev << " == " << tp - i.second.offset << " UTC";
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.
Parameters
tp | - | the time point for which conversion was attempted |
i | - | a std::chrono::local_info describing the result of the conversion attempt |
Exceptions
May throw std::bad_alloc
Inherited from std::exception
Member functions
[virtual] |
destroys the exception object (virtual public member function of std::exception ) |
[virtual] |
returns an explanatory string (virtual public member function of std::exception ) |