std::bind_front etc. with luabridge::newFunction and addFunction

[skrat]

It would be nice if luabridge::newFunction and addFunction would support the return value of std::bind, std::bind_front or a lambda with forwarded arguments, eg.:

luabridge::newFunction(L, std::bind_front(lua_draw_string, canvas));

  ns["draw_string"] = luabridge::newFunction(
      L, [&canvas](auto&& ...  args) {
        lua_draw_string(canvas, std::forward<decltype(args)>(args)...);
      });

I might be completely wrong here and something like this is not possible with C++ (17+).

[kunitoki]

It would be nice, will try to make it work

[kunitoki]

best i could do is #232, templated lambdas won't work because luabridge needs to know each and every argument, while [](auto&& ... args) {} and std::bind_front(f, ...) both have a templated operator() which we can't use to resolve arguments and their types.

[kunitoki]

You can do this:

ns.addFunction("add", std::function<int(int)>(std::bind_front(&add2, 10)));

or now with #232

ns.addFunction("add", luabridge::bind_front(&add2, 10));

[kunitoki]

Added both bind_front and bind_back