Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!deimos.cis.ksu.edu!unmvax!tut.cis.ohio-state.edu!ucbvax!ECNCDC.BITNET!MSRS002
From: MSRS002@ECNCDC.BITNET ("THE DOCTOR.")
Newsgroups: comp.lang.modula2
Subject: You're not my type!
Message-ID: <INFO-M2%89070203232565@UCF1VM>
Date: 30 Jun 89 17:04:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: Modula2 List <INFO-M2%UCF1VM.bitnet@jade.berkeley.edu>
Organization: The Internet
Lines: 41

This might be a question for the Zurich crew.

In the following module, are the types OneType and AnotherType compatible?
PIM3 seems to say they are both compatible with CARDINAL, but doesn't say
much about compatibility with each other.  I tried the module in JPI
TopSpeed version 1.17, and it found nothing to complain about.  I don't
think OneType and AnotherType are compatible.  Are they, or should they be?

MODULE WhatType ;

(* This module was created to answer a question about Type Checking *)

TYPE
  OneType = CARDINAL ;
  AnotherType = CARDINAL ;

VAR
  A : OneType ;
  B : AnotherType ;
  C : CARDINAL ;

BEGIN

(* Statement       My Opinion  *)
  A := C ;         (* Ok *)
  A := A + C ;     (* Ok *)
  B := C ;         (* Ok *)
  B := B + C ;     (* Ok *)
  A := B ;         (* No *)
  A := B + A ;     (* No *)
  END WhatType .


+-----------------+------------------------------------------------+
  Tom Ruby          Disclaimer:  Since I'm my own employer, the
  MSRS002@ECNCDC         views stated here are my own, and not
                         necessarily those of myself.
+-----------------+------------------------------------------------+
  Observation:  When a company is to big for innovation, it
  resorts to litigation.
+------------------------------------------------------------------+