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From: Preben Randhol <randhol+abuse@pvv.org>
Newsgroups: comp.lang.ada
Subject: Re: Relational Operators
Date: Fri, 26 Oct 2001 13:57:17 +0000 (UTC)
Organization: Norwegian university of science and technology
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On Fri, 26 Oct 2001 13:41:05 +0100, Gordon Cooke wrote:
> Is this code legal?
> 
> procedure Test is
>    B : Boolean;
> begin
>    B := True = True = True;
> end Test;

Consider:

B := True = 5 = 5;

If you write it as:

B := (True = 5) = 5;

you will get at compile time:

tests.adb:6:16: invalid operand types for operator "="
tests.adb:6:16: left operand has type universal integer
tests.adb:6:16: right operand has type "Standard.Boolean"

but change it to:

B := True = (5 = 5);

and it will be legal.

Preben