I know BOOST_BINARY. It is a excellent tool, but error message of following expression is confused. unsigned int bb1 = BOOST_BINARY( 01234 ); In VC 2008 EE, about seven hundred warning messages and one error message is outputted. I want to the error message explaining why it is wrong. warning C4003: not enough actual parameters for macro 'BOOST_DETAIL_SPLIT_AND_SWAP_PARAMS' ... fatal error C1009: compiler limit : macros nested too deeply The Previous proposal has a problem. BB_( 012 ); // Passed. (013)oct == (11)dec I propose simple and straightforward implementation again. Thanks. ----- binconst-1.h template< unsigned int N > struct binary_byte { static const unsigned int value = N % 8 + 2 * binary_byte< N / 8 >::value; error_if_not< 0 <= N && N <= 011111111 > Out_Of_Range; error_if_not< N % 8 <= 1 > Invalid_Binary_Digit; }; template<> struct binary_byte< 0 > { static const unsigned int value = 0; }; template< unsigned int B1, unsigned int B0 > struct binary_word { static const unsigned int value = (binary_byte< B1 >::value << 8) + (binary_byte< B0 >::value); }; template< unsigned int B3, unsigned int B2, unsigned int B1, unsigned int B0 > struct binary_dword { static const unsigned int value = (binary_word< B3, B2>::value << 16) + (binary_word< B1, B0 >::value); }; #define BB_( b0 ) \ binary_byte< 0##b0 >::value #define BW_( b1, b0 ) \ binary_word< 0##b1, 0##b0 >::value #define BD_( b3, b2, b1, b0 ) \ binary_dword< 0##b3, 0##b2, 0##b1, 0##b0 >::value 2009/1/15 David Abrahams <dave@boostpro.com>:
on Wed Jan 14 2009, "TaeKyeong Wang" <bugiii-AT-gmail.com> wrote:
C++ programmers want to input a constant of the binary form, like following. But, this is illegal in C++ world.
unsigned char value = 0b10001010;
There are some solutions of this lack. But, I can't find the gratifying answer.
http://www.boost.org/doc/libs/1_37_0/libs/utility/utility.htm#BOOST_BINARY ??
-- Dave Abrahams BoostPro Computing http://www.boostpro.com _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost