From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Subject: Re: Select + Accept syntax question
Date: Sat, 27 Aug 2016 12:36:31 -0700
Date: 2016-08-27T12:36:31-07:00 [thread overview]
Message-ID: <npsq41$7or$1@dont-email.me> (raw)
In-Reply-To: <60637c3a-c699-4e4c-9fd3-1a081cb6152c@googlegroups.com>
On 08/27/2016 11:26 AM, Andrew Shvets wrote:
>
> Why does this happen? Why can't I have code right before the accept? I can
> see a compilation error if there is no accept...
The definition of a selective accept doesn't allow this. This definition is in
ARM 9.7.1(2-7)
http://www.ada-auth.org/standards/rm12_w_tc1/html/RM-9-7-1.html
2
selective_accept ::=
select
[guard]
select_alternative
{ or
[guard]
select_alternative }
[ else
sequence_of_statements ]
end select;
3
guard ::= when condition =>
4
select_alternative ::=
accept_alternative
| delay_alternative
| terminate_alternative
5
accept_alternative ::=
accept_statement [sequence_of_statements]
6
delay_alternative ::=
delay_statement [sequence_of_statements]
7
terminate_alternative ::= terminate;
So the 1st thing after "select [guard]" or "or [guard]" has to be an accept,
delay, or terminate statement.
--
Jeff Carter
"Monsieur Arthur King, who has the brain of a duck, you know."
Monty Python & the Holy Grail
09
next prev parent reply other threads:[~2016-08-27 19:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-27 18:26 Select + Accept syntax question Andrew Shvets
2016-08-27 19:20 ` Niklas Holsti
2016-08-27 19:47 ` Andrew Shvets
2016-08-28 6:52 ` Niklas Holsti
2016-08-27 19:36 ` Jeffrey R. Carter [this message]
2016-08-27 19:48 ` Andrew Shvets
2016-08-27 23:22 ` Jeffrey R. Carter
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