Function luaL_checkstack

3rd/lua-5.4.3/src/lauxlib.c:380–387

** Ensures the stack has at least 'space' extra slots, raising an error ** if it cannot fulfill the request. (The error handling needs a few ** extra slots to format the error message. In case of an error without ** this extra space, Lua will generate the same 'stack overflow' error, ** but without 'msg'.) */

** but without 'msg'.)
*/
LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
  if (l_unlikely(!lua_checkstack(L, space))) {
    if (msg)
      luaL_error(L, "stack overflow (%s)", msg);
    else
      luaL_error(L, "stack overflow");
  }
}


LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) {