C++ 调用 Lua

直接上代码：

1：c++代码

• #include <lua.hpp>
  #include <LuaBridge/LuaBridge.h>
  
  #include <iostream>
  #include <string>
  
  class A
  {
  public:
          void action()
          {
                  std::cout<<"Hello I am A
  ";
          }
  
          virtual void doPrint(int a,int b)
          {
                  std::cout<<"in A a:"<<a<<"b:"<<b<<std::endl;
          }
  
          std::string goodMan() const
          {
                  return "goodman";
          }
  };
  
  class B : public A
  {
  public:
          void hello(const std::string& info) const
          {
                  std::cout<<"hello:"<<info<<std::endl;
          }
  
          virtual void doPrint(int a, int b) override
          {
                  std::cout<<"in B just"<<(a + b) <<std::endl;
          }
  };
  
  void globalFunction()
  {
          std::cout<<"hello this is a global func
  ";
  }
  
  bool reloadLuaScript(lua_State* L, const std::string& luafile)
  {
          int state = luaL_dofile(L, luafile.c_str());
          if(state != LUA_OK)
          {
                  return false;
          }
          return true;
  }
  
  void registerClassAndFunctions(lua_State* L)
  {
          using namespace luabridge;
          //注册全局函数和类函数
          getGlobalNamespace(L).addFunction("gloabalFunction",globalFunction); 
          getGlobalNamespace(L)
                  .beginClass<A>("A")
                  .addFunction("action",&A::action)
                  .addFunction("doPrint", &A::doPrint)
                  .addFunction("goodMan", &A::goodMan)
                  .endClass()
                  .deriveClass<B,A>("B")
                  .addFunction("hello", &B::hello)
                  .endClass();
  }
  
  void testCallLua(lua_State* L)
  {
          A a;
          lua_getglobal(L,"testA");
          luabridge::push(L, &a);
          lua_pcall(L,1,0,0);
  }
  
  int main(int argc, char** argv)
  {
          lua_State* L = luaL_newstate();
  
          luaL_openlibs(L);
          std::cout<<"try load file "<<argv[1]<<std::endl;
  
          auto ok = reloadLuaScript(L, argv[1]);
          if(!ok)
          {
                  std::cout<<"load lua file failed
  ";
          }
          else
          {
                  registerClassAndFunctions(L);
                  testCallLua(L);
          }
          lua_close(L);
          L = nullptr;
  }
  

2：Lua代码

• • --print("hello");
    --[[
            this is note
            这个是多行注释
    --]]
    print("This is myWorld!
    ");
    function testA(a)
            a:action();
            a:doPrint(1,2);
    end
    ~                                                                                                                                                                                                                 
    ~       
    

3：编译运行

• • [root@10-120-10-106 NewChart]# g++ -std=c++11 -o testlua testLua.cpp -llua -ldl
    [root@10-120-10-106 NewChart]# ./testlua abc.lua 
    try load file abc.lua
    This is myWorld!
    
    Hello I am A
    in A a:1b:2