Re: lua 5.2 beta & error level

[Tomas Guisasola Gorham <tomas@...>]

	Hi Ashwin

On Thu, 3 Nov 2011, Ashwin Hirschi wrote:
...
> 	 errorlevel.lua:20: strings only, please!
> 	 stack traceback:
> 		 [C]: in function 'error'
> 		 errorlevel.lua:14: in function 'down2'
> 		 errorlevel.lua:9: in function 'down1'
> 		 errorlevel.lua:4: in function 'go4it'
> 		 errorlevel.lua:20: in main chunk
> 		 [C]: in ?
>
> 				The very first line correctly identifies the 
> line (20) in the source code I'd like it to (and indicated when calling error 
> with level 4).
>
> However, the traceback begins with 4 "extra" lines that'll likely confuse the 
> person who's only seeing the client code... (while also exposing 
> internal/implementation details I'd like to hide!).
>
> Please note that in "real life" the client code is much more complicated and 
> often nested. So, having a traceback definitely does make sense.
>
> I'd just like it to be a bit more to the point when I've indicated as much to 
> the error function. Isn't that the function of error's level parameter in the 
> first place?
>
> What are your thoughts?
	I think the information above is quite useful, but I think your
point does make sense.	I confess I am used to read this kind of message,
but I believe it would be enough to add a signal at the proper line.
Something like that:

 	 errorlevel.lua:20: strings only, please!
	 stack traceback:
		 [C]: in function 'error'
		 errorlevel.lua:14: in function 'down2'
		 errorlevel.lua:9: in function 'down1'
		 errorlevel.lua:4: in function 'go4it'
		> errorlevel.lua:20: in main chunk <
		 [C]: in ?

	What do you think?

	Regards,
		Tomás