Re: Noob question -- On error, exit function and terminate script
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: Noob question -- On error, exit function and terminate script
- From: Florian Weimer <fw@...>
- Date: 2011年6月25日 19:59:18 +0200
* Rebel Neurofog:
> assert () is the best in your case (more verbose)
>
> error () may also be helpful
> especially if your error message requires complex evaluation:
> -- This requires 'some_complex_call ()' even if there was no error:
> assert (bar ~= "", "Error: "..some_complex_call ())
>
> -- While this will call 'some_complex_call ()' only in case of error
> if bar == "" then
> error ("Error: "..some_complex_call ())
> end
You can define something like this:
function fassert(condition, f, ...)
if not condition then
error("Error: " .. f(...))
end
end
(The "Error: " prefix is actually unnecessary, I think.)
Then you can write:
fassert(bar ~= "", some_complex_call)
Or if some_complex_call takes any arguments:
fassert(bar ~= "", some_complex_call, arg1, arg2)
Perhaps this is good enough for your purpose?