Re: [Boost-users] [boost-users] enable_if and checking if class derives from boost::operators does not work.

error: ./cs512/c++/primeMain.cpp(65) : error C2770: invalid explicit template argument(s) for 'boost::enable_if,void>::type test_operators(void)' ./cs512/c++/primeMain.cpp(58) : see declaration of 'test_operators' ./cs512/c++/primeMain.cpp(66) : error C2770: invalid explicit template argument(s) for 'boost::enable_if,void>::type test_operators(void)' ./cs512/c++/primeMain.cpp(58) : see declaration of 'test_operators' If that is the problem. Is their a way to fix is_operators to say that 1.) boost::operators<T> is at least one of the base class of MyInt. or 2.) A Way to have my class pass the "is_integral<T>" test. A user defined data type that acts like an integer and that passes the "is_integral" test . On 10/15/07, David Abrahams wrote:

The most obvious problem you have is that instantiating is_operator<BigInteger> is likely to cause an overloading ambiguity because BigInteger is derived from two different operator specializations.

-- Dave Abrahams Boost Consulting http://www.boost-consulting.com

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