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傳Lua對象到Cpp

傳Lua對象到Cpp

(金慶的專欄)

摘自：http://raycast.net/lua-intf

以下代碼演示了Lua函數和表傳入Cpp進行處理：

std::string acceptStuff(LuaRef luaObj,
   const std::vector<std::string>& stringVector,
   std::map<std::string, int>& dict)
{
   // Assume that this function expects Lua object (table) as first argument
   auto func = luaObj.get<std::function<std::string(int)>>("func");
   auto stringField = luaObj.get<std::string>("str");
   std::ostringstream s;
   s << "func() result: " << func(10) << ", string field value: " << stringField << "\n";
   s << "Vector size: " << stringVector.size() << ", first element: " << stringVector[0] << "\n";
   s << "Dictionary size: " << dict.size() << ", first element: (" <<
       dict.begin()->first << ", " << dict.begin()->second << ")";
   return s.str();
}

LuaBinding(lua).beginModule("test")
   .addFunction("acceptStuff", &acceptStuff)
.endModule();

// Lua
local obj = {
   func = function(i)
       return "You passed number " .. i
   end,
   str = "Hello, world"
}
local v = { 1, 2, 3 }
local dict = { first = 1, second = 2 }
print(test.acceptStuff(obj, v, dict))

// Output
func() result: You passed number 10, string field value: Hello, world
Vector size: 3, first element: 1
Dictionary size: 2, first element: (first, 1)

posted on 2016-07-19 16:09 金慶閱讀(412) 評論(0) 編輯收藏引用所屬分類: 1. C/C++

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