Bug or just something you can't do ?

[Alex Tweedly]

Thanks Mark - that's a great solution for a one-liner, or even for a 2- 
or 3- liner, but not practical for a real=life, multi-line handler.

(And as a purist I'd mention that it implements call-by-name not 
call-by-reference, to the sound of Algol reference papers 'thunk'ing 
onto my desk :-)

See the result of
> on mouseUp
>    local X, J
>    put 1 into J
>    put 1 into x[1]
>    put 7 into X[2]
>    inc "x[J]", "J" // use quotes instead of @
>    put x[1] && x[2]
> end mouseUp
>
> on inc x, t
>    local myContext
>
>    put line -1 of the executionContexts into myContext
>    set the debugContext to line -2 of the executionContexts
>    debugDo ("add 1 to" && t)
>    debugDo ("add 1 to" && x)
>    set the debugContext to myContext
> end inc
call-by-ref would have given "2 7" but here we get "1 8"

Thanks again
-- Alex.

On 01/10/2012 00:32, Mark Schonewille wrote:
> This:
>
> on foo
>       put 1 into x[1
>       inc "x[1]" // use quotes instead of @
>       put x[1]
> end foo
>
> on inc x
>       put line -1 of the executionContexts into myContext
>       set the debugContext to line -2 of the executionContexts
>       debugDo ("add 1 to"&&  x)
>       set the debugContext to myContext
> end inc
>
> --
> Best regards,
>
> Mark Schonewille
>
> Economy-x-Talk Consulting and Software Engineering
> Homepage: http://economy-x-talk.com
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>
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>
>> So we have a question:  if enough folks find this sort of suggested syntax useful, by what syntactic means could we tell the interpreter not to evaluate the argument?
>>
>> --
>> Richard Gaskin
>> Fourth World
>> LiveCode training and consulting: http://www.fourthworld.com
>> Webzine for LiveCode developers: http://www.LiveCodeJournal.com
>> Follow me on Twitter:  http://twitter.com/FourthWorldSys
>
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