Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ucbvax!hplabs!hpda!hpcupt1!jwolf
From: jwolf@hpcupt1.HP.COM (John Wolf)
Newsgroups: comp.lang.pascal
Subject: Re: C Ternary Conditional Expression?
Message-ID: <7020003@hpcupt1.HP.COM>
Date: 24 May 89 17:29:35 GMT
References: <950025@hpclcdb.HP.COM>
Organization: Hewlett Packard, Cupertino
Lines: 20

The following pascal statement is a more elegant way of expressing the above 
C statement, one less stack variable is used (i.e. no temporary variable
is required)...

IF (indx = last_indx)
  THEN a[last_val] := a[y] 
  ELSE a[f(indx)] := a[y];

However, the machine code emitted for the C statement mostly matches
the paradigm of Pascal statements you specified:

 IF (indx = last_indx)
    THEN temp := last_val
    ELSE temp := f(indx);
 a[temp] := a[y];

i.e. a temporary variable (or register) is set in the context of a
conditional branch and is later dereferenced as an array index.

John Wolf / x74682 / jwolf@hpda.HP.COM