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test with several issues
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Date: -- (:)
From: quercia@u...
Subject: test with several issues

I apologize for my poor english. Please, if you can read french skip the
30 following lines.

------------------------------ "English" text --------------------------------

*match* together with *when* enables to code nicely a test with several issues :

match 0 with
  _ when {condition-1} -> {action-1}
| _ when {condition-2} -> {action-2}
...
| _                    -> {default action}

This replaces the construct :

     if {condition-1} then {action-1}
else if {condition-2} then {action-2}
...
else                       {default action}

wich seems to me less readable. Annoyingly, one has to provide a value to
the match (0 here), but that value won't really be used.
Could you support my demand to INRIA so that the next releases of Caml-light
and Caml-special-light provide a nicer construct :

select
  when {condition-1} -> {action-1}
  when {condition-2} -> {action-2}
  ...
  otherwise          -> {default action}

like for example in PL/1 and in Rexx ?

------------------------------ texte Francais --------------------------------

*match* associe avec *when* permet de coder elegament un test a plusieurs
cas :

match 0 with
  _ when {condition-1} -> {action-1}
| _ when {condition-2} -> {action-2}
...
| _                    -> {action par defaut}

Ceci remplace la construction :

     if {condition-1} then {action-1}
else if {condition-2} then {action-2}
...
else                       {action par defaut}

qui me semble moins lisible. L'ennui est qu'il faut donner une
valeur a tester a match (ici 0) alors qu'on n'en fera rien.
Voulez-vous appuyer ma demande a l'INRIA pour que les prochaines versions
de Caml-light et Caml-special-light autorisent une construction encore plus
claire :

select
  when {condition-1} -> {action-1}
  when {condition-2} -> {action-2}
  ...
  otherwise          -> {action par defaut}

qu'on peut trouver par exemple en PL/1 et en Rexx ?

------------------------------------------------------------------------------
Michel Quercia,
Laboratoire d'informatique du lycee Carnot
16 bd Thiers
21000 Dijon
France
e-mail = quercia@u-bourgogne.fr
------------------------------------------------------------------------------