How to explicitly instantiate a template for all members of MPL vector in C++?

Question

Consider the following header file:

// Foo.h
class Foo {
    public: 
        template 
        void read(T& value);
};

I

Answer 1

I've had the same requirement not long ago, and had good results with a simple function template instantiation:

template 
void forceInstantiation(typedef boost::mpl::vector*) {

    using ex = int[];
    (void)ex{(void(&Foo::read), 0)..., 0};

    // C++17
    // (void)((void(&Foo::read), ...));
}

template void forceInstantiation(types*);