前言

MoonSharp是一個支援C#呼叫lua指令碼的類庫，支援.net, .net core, mono, unity，因此在.net core中也能夠使用，而且載入和呼叫lua也很方便簡單；

官網：http://www.moonsharp.org/

原始碼：https://github.com/xanathar/moonsharp

nuget：PM> Install-Package MoonSharp 

使用

載入指令碼

1             string scriptCode = @"    
2                 sum = 0
3                 for i = 1, 100 do
 
4                     sum = sum + i
5                 end
6                 return sum";
7             DynValue res = Script.RunString(scriptCode);    //執行指令碼
8             Console.WriteLine(res.Number);  //輸出：5050

載入指令碼檔案：

Console.WriteLine(Script.RunFile("luatest.txt").Number);   //指定檔名載入指令碼並執行

檔案內容：

sum = 0
 

for i = 1, 100 do
    sum = sum + i
end        
return sum

傳遞資料(lua全域性變數)

 1             string scriptCode = @"    
 2                 function fact (n)
 3                     if (n == 0) then
 4                         return 1
 5                     else
 6                         return n*fact(n - 1)
 
 7                     end
 8                 end
 9                 return fact(num)";  
10 
11             Script script = new Script();
12             script.Globals["num"] = 5;  //對指令碼中的全域性變數 num 賦值
13 
14             Console.WriteLine(script.DoString(scriptCode).Number);  //輸出：120

lua函式的定義與呼叫

 1             Script script = new Script();
 2             //先載入定義的函式
 3             script.DoString(@"
 4                     function fact(n)
 5                         if (n == 0) then
 6                             return 1
 7                         else
 8                             return n * fact(n - 1)
 9                         end
10                     end
11                 ");
12 
13             //如果該函式會重複利用的，那麼就應該這麼呼叫，而不是每次都呼叫DoString載入指令碼呼叫(每次都載入指令碼是費效能的)
14             Console.WriteLine(script.Call(script.Globals["fact"], 5).Number);   //輸出：120
15             Console.WriteLine(script.Call(script.Globals["fact"], DynValue.NewNumber(5)).Number);   //和上面的一樣

傳遞集合引數

 1             Script script = new Script();
 2             script.DoString(@"
 3                 function sum(list)
 4                     local total = 0;
 5                     for i,v in ipairs(list) do
 6                         total = total + v;
 7                     end
 8                     return total;
 9                 end
10                 ");
11 
12             Console.WriteLine(script.Call(script.Globals["sum"], new List<int>() { 1, 3, 5, 7, 9 }));  //輸出：25

多值返回：Tuple

 1             Script script = new Script();
 2             script.DoString(@"
 3                 function sum(kv)
 4                     local total = 0;
 5                     local ks = '';
 6                     for k,v in pairs(kv) do
 7                         total = total + v;
 8                         ks = ks .. k .. ',';    --字串拼接
 9                     end
10                     return ks, total;   --多值返回：Tuple
11                 end
12                 ");
13 
14             var dict = new Dictionary<string, int>()  //傳遞字典
15             {
16                 { "k1", 1 },
17                 { "k2", 2 },
18                 { "k3", 3 },
19             };
20             var tp = script.Call(script.Globals["sum"], dict).Tuple;  //返回tuple型別
21             Console.WriteLine(tp[0].String);    //輸出：k1,k2,k3,
22             Console.WriteLine(tp[0].Number);    //輸出：0, 如果是String型別的呼叫Number會輸出：0
23             Console.WriteLine(tp[1].Number);  //輸出：6

lua指令碼中載入和呼叫C#程式碼定義的函式

 1         public static void CallList()
 2         {
 3             Script script = new Script();
 4             script.Globals["getlist"] = (Func<List<int>, List<int>>)GetList;    //載入C#中定義的函式
 5             script.DoString(@"
 6                 function sum(list)
 7                     local total = 0;
 8                     for i,v in ipairs(list) do
 9                         total = total + v;
10                     end
11                     return total;
12                 end
13                 ");
14 
15             string scode = @"return sum(getlist( { 11, 12, 13, 14, 15 } ))";    //指令碼中呼叫C#中定義的函式
16             Console.WriteLine(script.DoString(scode));  //輸出：120
17 
18         }
19 
20         private static List<int> GetList(List<int> list)
21         {
22             for (int i = 1; i <= 10; i++)
23                 list.Add(i);
24             return list;
25         }