New is_complex<T> failing with const types

[dolfim@…]

I would like to report a change in behavior for the new version of the type_traits in Boost 1.60.0 (b1).

When the type is const std::complex<T>, the traits return false. This is different between 1.58.0 and the current 1.60.0b1

Example:

template <typename T>
void mycheck() {
    if (boost::is_complex<T>())
        std::cout << "COMPLEX" << std::endl;
    else
        std::cout << "REAL" << std::endl;
}

int main () {
    mycheck<float>(); // REAL
    mycheck<double>(); // REAL
    mycheck<int>(); // REAL
    mycheck<std::complex<float> >();  // COMPLEX
    mycheck<std::complex<double> >();  // COMPLEX
    mycheck<std::complex<const double> >();  // COMPLEX
    mycheck<const std::complex<double> >();  // COMPLEX in 1.58.0, REAL in 1.60.0_b1
}

[John Maddock]

Fixed via ​https://github.com/boostorg/type_traits/pull/22