New Lua Custom Functions?

[Yue]

It is possible from c++ to create new functions lua, and that later on to be called des script Lua?

[AggrorJorn]

You can use ToLua++. 

 

 

[Crazycarpet]

https://www.lua.org/pil/24.html

 

See lua_register, but keep in mind you have to wrap the functions you wish to expose in plain C.... ToLua++ is your best bet.

https://bitbucket.org/Codeblockz/toluapkggenerator2

If you can figure out how to use my above tool, it will help you a ton! It'll auto-generate your Lua bindings for anything commented with //lua including enumerations, classes, polymorphic classes, namespaces, etc...

Keep in mind to expose a class and it's members you have to tag the class declaration too like so:

class MyClass //lua
{
  void MyExposedFunc(); //lua
  int myExposedVar; //lua
  void MyUnexposedFunc();
}

In Lua you would then do:

local obj = MyClass()
obj:MyExposedFunc()
print(obj.myExposedVar)

You do not have to tag namespaces with //lua however. I also wrote a C++ version of this I'm not planning on releasing publicly but if you need it I may be able to share it if you don't give it out.

Also note that with namespaces the access is different like:

namespace MyNamespace {
    void MyFunc(); //lua
}

Lua:

MyNamespace.MyFunc()

Note the '.' instead of ':' as namespaces are simply tables, where as classes are metatables.