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/C++std::chrono::ambiguous_local_time
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 an 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 take a std::chrono::local_time).
Inheritance diagram.
Member functions
| (constructor) | constructs the exception object (public member function) |
| operator= | replaces the exception object (public member function) |
| what | returns the explanatory string (public member function) |
std::chrono::ambiguous_local_time::ambiguous_local_time
template< class Duration >
ambiguous_local_time( const std::chrono::local_time<Duration>& tp,
const std::chrono::local_info& i );
| (1) | (since C++20) |
ambiguous_local_time( const ambiguous_local_time& other ) noexcept; | (2) | (since C++20) |
Constructs the exception object.
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";
i.result != std::chrono::local_info::ambiguous.*this and other both have dynamic type std::chrono::ambiguous_local_time then std::strcmp(what(), other.what()) == 0.Parameters
| tp | - | the time point for which conversion was attempted |
| i | - | a std::chrono::local_info describing the result of the conversion attempt |
| other | - | another ambiguous_local_time to copy |
Exceptions
May throw std::bad_alloc.
Notes
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.
std::chrono::ambiguous_locale_time::operator=
ambiguous_locale_time& operator=( const ambiguous_locale_time& other ) noexcept; | (since C++20) |
Assigns the contents with those of other. If *this and other both have dynamic type std::chrono::ambiguous_locale_time then std::strcmp(what(), other.what()) == 0 after assignment.
Parameters
| other | - | another exception object to assign with |
Return value
*this.
std::chrono::ambiguous_locale_time::what
virtual const char* what() const noexcept; | (since C++20) |
Returns the explanatory string.
Parameters
(none).
Return value
Pointer to a null-terminated string with explanatory information. The string is suitable for conversion and display as a std::wstring. The pointer is guaranteed to be valid at least until the exception object from which it is obtained is destroyed, or until a non-const member function (e.g. copy assignment operator) on the exception object is called.
Notes
Implementations are allowed but not required to override what().
Inherited from std::runtime_error
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) |
See also
|
(C++20) | exception thrown to report that a local time is nonexistent (class) |
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