Re: [TCLCORE] TIP#329: Try/Catch/Finally syntax

[Fredderic <mag...@gm...>]

On Fri, 12 Dec 2008 02:08:40 +0200, 
Twylite <tw...@cr...> wrote:

> Okay, I found some time to work on the reference implementation.
> 
> Changes:
> - 'throw' has behavior consistent with 'error'.  The 'interp alias' 
> approach that was suggested behaves weirdly if you don't get the 
> arguments right, so the implementation is proc-based.
> - removed the 'as {resultsVar optionsVar}' clause and introduced 
> per-handler variable assignment
> - improved error messages
> - improved behavior of '-during'
> - added tests (there are just under 100 tests covering most aspects
> of the functionality; more to come)
> 
> Outstanding issues:
> - In the case of a fallthrough body "-", to which variable(s) should
> the outcome of the try body be assigned?

Simplest solution: revert the decision about 'as {resultsVar
optionsVar}' in the first place.  Per-handler variables are redundant
and add unnecessary complexity.  Just set them once, they'll be
available to all handler bodies, and the rest of the script from this
point onwards, as anyone would expect.  Simple, no surprised, no corner
cases, and insanely efficient, plus forward-compatible if we ever get
more useful handler matching.


-- 
Fredderic

The cost of living is going up
and the chance of living is going down.
		-- Flip Wilson

Debian/unstable (LC#384816) on i686 2.6.23-z2 2007 (up 11 days,  4:16)