目标

使用C++调用lua接口

示例

lua代码(test.lua)

function interpreter(in_str)
  return load(in_str)()
end

C++调用示例(lua_test.cpp)

extern "C" {
      #include "include/lua.h"
      #include "include/lauxlib.h"
      #include "include/lualib.h"
}
#include <iostream>

bool run(lua_State* L, std::string in_data) {
  lua_getglobal(L, "interpreter");
  lua_pushstring(L, in_data.c_str());
  lua_call(L, 1, 1);
  return lua_toboolean(L, -1);
}

int main(int argc, char* argv[]) {
  lua_State* L = luaL_newstate();  // 初始化
  luaL_openlibs(L);  //
  if (luaL_loadfile(L, argv[1]) || lua_pcall(L, 0, 0, 0)) {
    std::cout << "error: " << lua_tostring(L, -1) << std::endl;
    return 0;
  }
  std::cout << run(L, "return 2 < 3 and 4 > 6") << std::endl;
  return 0;
}

编译

g++ lua_test.cpp -L./lib -llua -ldl -o lua_test

调用

./lua_test test.lua