Re: new language construct proposed

[nobody@REPLAY.COM (Anonymous)]

On Fri, 23 Jan 1998 10:32:51 -0800, "Chris Sparks (Mr. Ada)"
<mrada@CATALINA-INTER.NET> wrote:

> Hi all,
> 
> I sure wish that the following was implemented in the language:
> 
> raise <EXCEPTION> when <CONDITIONAL_EXPRESSION>;
> 
> oh well....
> 
> 
> Chris Sparks
> 
> 

I submitted a revision request for this:

raise [exception_name] [when boolean_expression];

thinking it would be clear, easy to implement, not cause any problem
with existing Ada-83 code, and be useful. It didn't make it into the
revised language.

Note that the exception name is optional so you can use it in an
exception handler.

A "when" clause on the return statement would also be clear, useful,
easy to implement, and not cause any problem with existing code. Since
exit, raise, and return all send the execution elsewhere in the code,
for completeness we should as for when on goto statements, too, but
maybe they should remain harder to write.

Jeff Carter  PGP:1024/440FBE21
My real e-mail address: ( carter @ innocon . com )
"English bed-wetting types."
Monty Python & the Holy Grail

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