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std::bitset::to_ullong(3)      C++ Standard Libary     std::bitset::to_ullong(3)

NAME
     std::bitset::to_ullong - std::bitset::to_ullong

Synopsis
	unsigned long long to_ullong() const  (since C++11)
					      (constexpr since C++23)

	Converts the contents of the bitset to an unsigned long long integer.

	The  first  bit of the bitset corresponds to the least significant digit
     of the number
	and the last bit corresponds to the most significant digit.

Parameters
	(none)

Return value
	The converted integer

Exceptions
	std::overflow_error if the value can not be represented in unsigned long
     long.

Example
     // Run this code

      #include <bitset>
      #include <iostream>
      #include <limits>

      int main()
      {
	  std::bitset<std::numeric_limits<unsigned long long>::digits> b
	  (
	      0x123456789abcdef0LL
	  );

	  std::cout << b << "  " << std::hex << b.to_ullong() << '\n';
	  b.flip();
	  std::cout << b << "  " << b.to_ullong() << '\n';

	  std::bitset<std::numeric_limits<unsigned long long>::digits + 1> q{0};
	  try
	  {
	      (~q).to_ullong(); // throws
	  }
	  catch (const std::overflow_error& ex)
	  {
	      std::cout << "ex: " << ex.what() << '\n';
	  }
      }

Output:
      0001001000110100010101100111100010011010101111001101111011110000
     123456789abcdef0
      1110110111001011101010011000011101100101010000110010000100001111	     ed-
     cba9876543210f
      ex: _Base_bitset::_M_do_to_ullong

See also
	to_string returns a string representation of the data
		  (public member function)
	to_ulong  returns an unsigned long integer representation of the data
		  (public member function)

http://cppreference.com 	   2024.06.10	       std::bitset::to_ullong(3)
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