c++functionboostbinders

lightweight boost::bind

I'm so sick of the pass-callback-data-as-void*-struct anti-pattern. Boost bind solves it nicely, but is an unacceptable dependency. What's a lightweight alternative? How would I write it myself as simply as possible?

Solution

  • I'm not familiar with boost:bind, but is it something like this?

    #include <iostream>

void foo (int const& x) {
    std::cout << "x = " << x << std::endl;
}

void bar (std::string const& s) {
    std::cout << "s = " << s << std::endl;
}

template<class T>
void relay (void (*f)(T const&), T const& a) {
    f(a);
}

int main (int argc, char *argv[])
{
    std::string msg("Hello World!");
    relay (foo, 1138);
    relay (bar, msg);
}

    Output -- 

    x = 1138
s = Hello World!