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,
|
(1) | (since C++20) |
|
ambiguous_local_time
(
const
ambiguous_local_time
&
other
)
noexcept
;
|
(2) | (since C++20) |
Constructs the exception object.
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";
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.
|
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 nonexistent
(class) |