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std::exception::exception(3)  C++ Standard Libary std::exception::exception(3)

NAME
       std::exception::exception - std::exception::exception

Synopsis
	  exception() throw();					(until C++11)
	  exception() noexcept;				(1)	(since C++11)
	  exception(	const	 exception&    other   )   throw();	   (2)
       (until C++11)
	  exception(	 const	   exception&	   other      )	     noexcept;
       (since C++11)

	  Constructs new exception object.

	  1)  Default  constructor.  what()  returns an	implementation-defined
       string.
	  2) Copy constructor. Initializes the contents	with those  of	other.
       If *this	and
	  other	both have dynamic type std::exception then std::strcmp(what(),
       other.what())
	  == 0.

Parameters
	  other	- another exception to assign the contents of

Notes
	  Because copying std::exception is not	permitted to throw exceptions,
       when derived
	  classes  (such  as std::runtime_error) have to manage	a user-defined
       diagnostic
	  message, it is typically implemented as a copy-on-write string.

	  The Microsoft	implementation includes	non-standard constructors tak-
       ing strings thus
	  allowing instances to	be thrown directly  with  a  meaningful	 error
       message.	The
	  nearest    standard	 equivalents	are    std::runtime_error   or
       std::logic_error.

	  Defect reports

	  The following	behavior-changing defect reports were applied retroac-
       tively to
	  previously published C++ standards.

	    DR	     Applied	to		   Behavior    as    published
       Correct behavior
	  LWG  471  C++98	there  is  no  requirement  on	what()	of the
       added
			     exception copy

http://cppreference.com		  2024.06.10	  std::exception::exception(3)

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