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 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) |
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 ) |
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