Re: Error handling
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- Subject: Re: Error handling
- From: Klaus Ripke <paul-lua@...>
- Date: 2006年2月16日 22:48:56 +0100
Hi Chris
On Thu, Feb 16, 2006 at 04:35:08PM -0500, Chris wrote:
> The problem with string error messages can be pointed at in your own
> example:
>
> elseif problem == "radiu failure"
how is this different from any typo in a number?
In that you can tell the error in the string, no?
> Numeric error codes (or other "fixed" types like an exception) are much
> more useful for error handling in code. The strings are good for the end
> user for sure but code needs a little more.
which is what exactly?
> This is especially true when dealing with multiple languages like I am. I
> have a Lua backend interfacing to C, XML-RPC, and JavaScript. The text
> messages are just not reliable enough with all these systems in play
> (versus numeric codes which would be easy to deal with in all those
> systems).
obviously you either depend on some constants of whatever type,
which is reliable, or you don't.
How is it easier to use numeric constants cross language than strings?
I see it is nice to use a switch or some bitmasking on numbers in C,
but in Lua, extracting some substring is better supported than bit ops.
cheers
Klaus