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

NAME
     std::bitset::to_ulong - std::bitset::to_ulong

Synopsis
	unsigned long to_ulong() const	(constexpr since C++23)

	Converts the contents of the bitset to an unsigned 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
	Throws std::overflow_error if the value can not be  represented  in  un-
     signed long.

Example
     // Run this code

      #include <bitset>
      #include <iostream>
      #include <stdexcept>

      int main()
      {
	  for (unsigned long i = 0; i < 10; ++i)
	  {
	      std::bitset<5> b(i);
	      std::bitset<5> b_inverted = ~b;
	      std::cout << i << '\t' << b << '\t' << b_inverted << '\t'
			<< b_inverted.to_ulong() << '\n';
	  }

	  std::cout << std::bitset<32>().to_string('-') << '\n';

	  try
	  {
	      std::bitset<128> x(42);
	      std::cout << x.to_ulong() << '\n';
	      x.flip();
	      std::cout << x.to_ulong() << '\n'; // throws
	  }
	  catch (const std::overflow_error& ex)
	  {
	      std::cout << "ex: " << ex.what() << '\n';
	  }
      }

Possible output:
      0   00000   11111   31
      1   00001   11110   30
      2   00010   11101   29
      3   00011   11100   28
      4   00100   11011   27
      5   00101   11010   26
      6   00110   11001   25
      7   00111   11000   24
      8   01000   10111   23
      9   01001   10110   22
      --------------------------------
      42
      ex: bitset to_ulong overflow error

See also
	to_string returns a string representation of the data
		  (public member function)
	to_ullong  returns  an	unsigned long long integer representation of the
     data
	(C++11)   (public member function)

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