Dear Raphael,
thanks for you explanation. But I am still looking for the place in the
language definition where the value of
a pair of sentences is defined to be the value of the last sentence, and
similarly where the value of a "local ... in <s2> end"-sentence
is the value of the <s2>?
Pedagogical tricks wrt. Oz syntax anyone?
Regards,
--- Øystein N.
Den 4. nov. 2011 kl. 19.05 skrev Raphael Collet:
> Dear Øystein Nytrø,
>
> The statement "local Y in local X=[1 2] in X.1 = Y end end" is used as an
> expression. Consider a fresh variable Z assigned to it, and rewrite the
> browse statement as:
>
> local Z in
> Z = local Y in local X=[1 2] in X.1 = Y end end % (1)
> {Browse Z}
> end
>
> You can push the assignment to Z inside (1) as:
>
> local Y in
> local X=[1 2] in
> Z = (X.1 = Y)
> end
> end
>
> The statement (X.1 = Y) is a valid expression, and its value is equal to both
> X.1 and Y. Therefore the value of Z is 1. QED :-)
>
> Cheers,
> Raphael
>
> On Fri, Nov 4, 2011 at 3:11 PM, Øystein Nytrø <[email protected]> wrote:
>
> Running:
> {Browse local Y in local X=[1 2] in X.1 = Y end end}
> %% (for example)
>
> yields
> "1"
>
> Would anyone care to point to where the semantics of {Browse <sentence>} is
> explained properly?
>
> Regards,
> --- Øystein Nytrø
>
> -------------------------------------------------------------------------------------------------------
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IDI, NTNU, NO-7491 TRONDHEIM, Norway
tel +47 73594459, mob +47 91897606
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