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From: cdb@hpclcdb.HP.COM (Carl Burch)
Newsgroups: comp.lang.pascal
Subject: C Ternary Conditional Expression?
Message-ID: <950025@hpclcdb.HP.COM>
Date: 23 May 89 20:35:52 GMT
Organization: Hewlett-Packard Calif. Language Lab
Lines: 26


Can anyone think of a way to express in Pascal a form equivalent to the
ternary conditional expression in C without using a separate statement?
I need to speed up an expression that usually matches a cached value, but 
can't figure out how to move the code out of the called function
( represented by f(indx) below) to save the procedure call overhead.

For instance, how could one translate :

 a[ (indx == last_indx) ? last_val : f(indx) ] = a [ y ];

without using an IF statement?  Preferably without using a temporary variable.

The only Pascal equivalent I've generated is :

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

Please omit all flames - I just happen to know how to do this in C and nobody
I've asked has been able to design a Pascal equivalent.

							Thanks,

							Carl Burch