Calling Lua function by string name-CodePudding

What I'm trying to do:

someTable={
    function Add(a,b)
        return a b
    end

    function Mult(a,b)
        return a*b
    end

    function CallFunc(name,inputs)
 funcByName(table.unpack(inputs))
    end
}

And then I can call it from C#:

void Call(string name, params object[] inputs)

And the question is, how do I call a function by string name?

Also, CallFunc will be in metatable.

If there is any other way of solving the issue I'd also like to hear.

(Sorry for the formating but I'm writing from a phone for some reason)

CodePudding user response：

All global variables and functions are stored in the global table named _G, this makes you able to access a function by their string name. The following code prints "test" three times. Notice that the 3rd way uses a string to access it

function a()
  print("test")
end

a()
_G.a()
_G["a"]()

CodePudding user response：

I would suggest to put the library in its own Lua file.

-- my-lib.lua

local Module = {}

function Module.Add(a,b)
  return a b
end

function Module.Mult(a,b)
  return a*b
end

function Module.GenericCall(FunctionName,...)
  local Function = Module[FunctionName]
  if Function then
    return Function(...)
  end
end

return Module

Then the use of this library in another part of the Lua code is straight-forward:

local MyModule    = require("my-lib")
local GenericCall = MyModule.GenericCall

GenericCall("Add",  1, 2)
GenericCall("Mult", 1, 2)