> In fact, it has existed long before lambdas where introduced.
Both std::function<> and lambdas were introduced in C++11.
Furthermore absolutely no one should use std::bind, it's an absolute abomination.
Both std::function<> and lambdas were introduced in C++11.
Furthermore absolutely no one should use std::bind, it's an absolute abomination.
> Furthermore absolutely no one should use std::bind, it's an absolute abomination.
Agree 100%! I almost always use a wrapper lambda.
However, it's worth pointing out that C++20 gave us std::bind_front(), which is really useful if you want to just bind the first N arguments:
struct Foo {
void bar(int a, int b, int c);
};
Foo foo;
using Callback = std::function<void(int, int, int)>;
// with std::bind (ugh):
using namespace std::placeholders;
Callback cb1(std::bind(&Foo::bar, &foo, _1, _2, _3));
// lambda (without perfect forwarding):
Callback cb2([&foo](auto&&... args) { foo.bar(args...); });
// lambda (with perfect forwarding):
Callback cb3([&foo](auto&&... args) { foo.bar(std::forward<decltype(args)>(args)...); });
// std::bind_front
Callback cb4(std::bind_front(&Foo::bar, &foo));