C# NLua: Accessing generic parameters

Question

I have an Entity component system using generic parameters. I am trying to get Lua scripting to work using NLua.

However I do not know how to access a generic parameter from the Lua environment.

Something like this?:

if e:HasComponent<Position>() then
    print("Found position...")
end

If there is no way to do this then how would I go about making the components accessible via strings?

Code snippets will be given on request as I do not think it is a problem with my code.

score 4 · Accepted Answer · edited Jan 28 '21 at 21:23

You can try to call the Generic method directly, without the type parameter, NLua will try to match the method name.

if e:HasComponent () then
    ...
end

If it fails you can also try to wrap you generic method into a non-generic extension method.

public static HasPositionComponent (this TypeE e)
{
     return e.HasComponent<Position>();
}

Then you can call HasPositionComponent as a regular method from Lua

if e:HasPositionComponent () then
    ...
end

Take a look at the GenericMethod test:

1 Answers1