调用函数&&错误处理
lua文件
main.lua
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function event() print("C++ test") end |
C++文件
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#include <iostream> extern "C" { #include <lua.h> #include <luaxlib.h> #include <lualib.h> } int main() { lua_State * lua = luaL_newstate(); luaL_openlibs(lua); luaopen_base(lua); if(luaL_loadfile(lua,"main.lua")) { const std::string error = lua_tostring(lua,-1); std::cout << "lua file load error:" << error << std::endl; return -1; } if(lua_pcall(lua,0,0,0)) { const std::string error = lua_tostring(lua,-1); std::cout << "lua pcall error:" << error << std::endl; return -1; } //调用函数 lua_getglobal(lua,"event"); //可以用gettop来测试有没有调用成功 std::cout << lua_gettop(lua) << std::endl; if(lua_pcall(lua,0,0,0) != 0) { std::cout << "call event failed:" << lua_tostring(lua,-1) <<std::endl; lua_pop(lua,1); } std::cout << lua_gettop(lua) << std::endl; lua_close(lua); return 0; } |
传递参数&&接收返回值
lua文件
main.lua
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function event(e) print("C++ test") print(e) return "isok" end |
C++函数
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#include <iostream> extern "C" { #include <lua.h> #include <luaxlib.h> #include <lualib.h> } int main() { lua_State * lua = luaL_newstate(); luaL_openlibs(lua); luaopen_base(lua); if(luaL_loadfile(lua,"main.lua")) { const std::string error = lua_tostring(lua,-1); std::cout << "lua file load error:" << error << std::endl; return -1; } if(lua_pcall(lua,0,0,0)) { const std::string error = lua_tostring(lua,-1); std::cout << "lua pcall error:" << error << std::endl; return -1; } //调用函数 lua_getglobal(lua,"event"); //传递参数 lua_pushstring(lua,"key"); //可以用gettop来测试有没有调用成功 std::cout << lua_gettop(lua) << std::endl; //第二个参数传递了1个参数,第三个参数接收1个返回值 if(lua_pcall(lua,1,1,0) != 0) { std::cout << "call event failed:" << lua_tostring(lua,-1) <<std::endl; lua_pop(lua,1); } else std::cout << "lua return :" << lua_tostring(lua,-1) << std::endl; std::cout << lua_gettop(lua) << std::endl; lua_close(lua); return 0; } |
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