第10月第6天 lua 闭包

static int mytest(lua_State *L) {
//获取上值
int upv = (int)lua_tonumber(L, lua_upvalueindex(1));
printf("%d\n", upv);
upv += 5;
lua_pushinteger(L, upv);
lua_replace(L, lua_upvalueindex(1));

//获取一般参数
printf("%d\n", (int)lua_tonumber(L,1));

return 0;
}

int main(void) {
lua_State *L = luaL_newstate();
luaL_openlibs(L);

//设置Cclosure函数的上值
lua_pushinteger(L,10);
lua_pushinteger(L,11);
lua_pushcclosure(L,mytest,2);
[code]

lua_setglobal(L,

"upvalue_test"

);