Re: pcall and xpcal

[Philippe Fremy <phil@...>]

On Friday 13 August 2004 14:37, Roberto Ierusalimschy wrote:
> > pcall and xpcall serve the same purpose (calling  a function with some
> > special error handling) and one would expect that they have the same
> > arguments.
>
> They can't, as xpcall needs an error handler. Whatever the solution,
> they could not have the same arguments.

Ah, that's the reason:
pcall( f, arg1, arg2, ... )

xpcall( f, err_handler )

It should not be difficult to turn xpcall into :
xpcall( f, err_handler, arg1, arg2, ...)

That's what I meant by "the same arguments" although you are right that they 
are not the same.

It would have probably been better if xpcall had started as:
xpcall( err_handler, f )
where passing the extra arguments to f just after f would have been more 
logical :
xpcall(err_handler, f, arg1, arg2, ...)

Anyway, does a xpcall( f, err_handler, arg1, arg2, ... ) make sense ? Else, 
I am forced to create a local function wrapper that has no argument to wrap 
my functions with arguments.

	cheers,

	Philippe 


>
> -- Roberto

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