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std::chrono...s_local_time(3) C++ Standard Libarystd::chrono...s_local_time(3) NAME std::chrono::ambiguous_local_time - std::chrono::ambiguous_local_time Synopsis 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 func- tions that call it (such as the constructors of std::chrono::zoned_time that takes a std::chrono::local_time). std-chrono-ambiguous local time-inheritance.svg 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) const std::chrono::local_info& i ); ambiguous_local_time( const ambiguous_local_time& other ) (2) (since C++20) noexcept; Constructs the exception object. 1) 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"; The behavior is undefined if i.result != std::chrono::lo- cal_info::ambiguous. 2) Copy constructor. If *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 con- version 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 in- ternally as a separately-allocated reference-counted string. std::chrono::ambiguous_locale_time::operator= ambiguous_locale_time& operator=( const ambiguous_locale_time& other (since C++20) ) noexcept; 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 ob- tained 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 destructor destroys the exception object [virtual] (virtual public member function of std::exception) what returns an explanatory string [virtual] (virtual public member function of std::exception) http://cppreference.com 2022.07.31 std::chrono...s_local_time(3)
NAME | Synopsis | Member functions | Parameters | Exceptions | Notes | Parameters | Return value | Parameters | Return value | Notes | Member functions
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