Question

is it somehow possible to use a lambda within a call to assert() ?

When i try the following…

assert([&]() -> bool{
        sockaddr_storage addr; int addrlen = sizeof(addr);
        return (getsockname(this->m_Socket, (sockaddr*)&addr, &addrlen) != 0) ? false : true;
    });

… i get the error

error C2675: unary ‘!’ : ‘`anonymous-namespace’::’ does not define this operator or a conversion to a type acceptable to the
predefined operator

Answer 1

Sure, but assert really only wants a boolean; not a lambda, so you’ll have to call it yourself (this assuming that your lambda is one that returns something you want to assert):

assert(([&]() -> bool{
        sockaddr_storage addr; int addrlen = sizeof(addr);
        return getsockname(this->m_Socket, (sockaddr*)&addr, &addrlen) == 0;
    })());