Function finishpcall

3rd/lua-5.4.3/src/lbaselib.c:440–448

** Continuation function for 'pcall' and 'xpcall'. Both functions ** already pushed a 'true' before doing the call, so in case of success ** 'finishpcall' only has to return everything in the stack minus ** 'extra' values (where 'extra' is exactly the number of items to be ** ignored). */

** ignored).
*/
static int finishpcall (lua_State *L, int status, lua_KContext extra) {
  if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) {  /* error? */
    lua_pushboolean(L, 0);  /* first result (false) */
    lua_pushvalue(L, -2);  /* error message */
    return 2;  /* return false, msg */
  }
  else
    return lua_gettop(L) - (int)extra;  /* return all results */
}


static int luaB_pcall (lua_State *L) {