How Can I Get Param In lua script when I Call CallByParam

[2276282419]

• GopherLua is a Lua5.1 implementation. You should be familiar with Lua programming language. Have you read Lua 5.1 reference manual carefully?
• GopherLua is a Lua5.1 implementation. In Lua, to keep it simple, it is more important to remove functionalities rather than to add functionalities unlike other languages . If you are going to introduce some new cool functionalities into the GopherLua code base and the functionalities can be implemented by existing APIs, It should be implemented as a library.

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1. What version of GopherLua are you using? :
2. What version of Go are you using? :
3. What operating system and processor architecture are you using? :
4. What did you do? :
5. What did you expect to see? :
6. What did you see instead? :

[2276282419]

fn, err := L.LoadString(`
  function hello(message_part)
    print(message_part)
	return "hi"
  end
  hello("e")
`)	

L.SetGlobal("hello", fn)
if err := L.CallByParam(lua.P{
Fn: L.GetGlobal("hello"),
NRet: 1,
Protect: true,
}, lua.LNumber(10)); err != nil {
panic(err)
}
I want get number 10 in hello function

[waschik]

The function LoadString returns the full string. So each time you call fn it redefines hello. In this case DoString might be easier:

	err := L.DoString(`
          function hello(message_part)
            print(message_part)
	    return "hi"
          end
          hello("e")
        `)
	if err != nil {
		panic(err)
	}

	err = L.CallByParam(lua.P{
		Fn:      L.GetGlobal("hello"),
		NRet:    1,
		Protect: true,
	}, lua.LNumber(10))
	if err != nil {
		panic(err)
	}

Alternatively you could call fn to actually define hello.

	fn, err := L.LoadString(`
          function hello(message_part)
            print(message_part)
	    return "hi"
          end
          hello("e")
        `)
	if err != nil {
		panic(err)
	}

	err = L.CallByParam(lua.P{
		Fn:      fn,
		NRet:    0,
		Protect: true,
	})
	if err != nil {
		panic(err)
	}

	err = L.CallByParam(lua.P{
		Fn:      L.GetGlobal("hello"),
		NRet:    1,
		Protect: true,
	}, lua.LNumber(10))
	if err != nil {
		panic(err)
	}

Output is in both cases:

e
10