std::chrono::nonexistent_local_time
| Defined in header <chrono>
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| class nonexistent_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 nonexistent 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::nonexistent_local_time::nonexistent_local_time
| template< class Duration > nonexistent_local_time( const std::chrono::local_time<Duration>& tp, |
(1) | (since C++20) |
| nonexistent_local_time( const nonexistent_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 in a gap between\n" << std::chrono::local_seconds(i.first.end.time_since_epoch()) + i.first.offset << ' ' << i.first.abbrev << " and\n" << std::chrono::local_seconds(i.second.begin.time_since_epoch()) + i.second.offset << ' ' << i.second.abbrev << " which are both equivalent to\n" << i.first.end << " UTC";
std::chrono::nonexistent_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 nonexistent_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::nonexistent_locale_time::operator=
| nonexistent_locale_time& operator=( const nonexistent_locale_time& other ) noexcept; |
(since C++20) | |
Assigns the contents with those of other.If *this and other both have dynamic type std::chrono::nonexistent_locale_time then std::strcmp(what(), other.what()) == 0 after assignment.
Parameters
| other | - | another exception object to assign with |
Return value
*this
std::chrono::nonexistent_locale_time::what
virtual const char* what() const noexcept; |
(since C++20) | |
Returns the explanatory string.
Return value
Pointer to an implementation-defined 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.
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The returned string is encoded with the ordinary literal encoding during constant evaluation. |
(since C++26) |
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 ambiguous (class) |