Assigning C Function Pointers to Lambdas

Lambdas as function pointers

Lambdas without captures can be implicitly converted to function pointers. Let's say we are using a C library, or an older C++ library, that uses a callback function as a parameter, like this:

The callback is called with a return code and some downloaded content. It is possible to pass a lambda as a parameter when calling download_webpage(). Since the callback is a regular function pointer, the lambda must not have any captures and we ...