From: Adam Beneschan <adam@irvine.com>
Subject: Re: Weird behavior with modular type
Date: Tue, 7 Feb 2012 10:40:17 -0800 (PST)
Date: 2012-02-07T10:40:17-08:00 [thread overview]
Message-ID: <2de5a8e2-10e7-4c4b-8997-d8546561b2b9@k28g2000yqn.googlegroups.com> (raw)
In-Reply-To: op.v9bm8nt4ule2fv@douda-yannick
On Feb 7, 10:35 am, Yannick Duchêne (Hibou57)
<yannick_duch...@yahoo.fr> wrote:
> Le Tue, 07 Feb 2012 19:15:27 +0100, Adam Beneschan <a...@irvine.com> a
> écrit:
>
> > In the first example, [...] Anyway,
> > this means that in 10**I, the type of 10 is the modular type
> > Modular_Type
>
> Why? "I" is a subtype of Natural, so 10**I should be too.
Please reread what I wrote about "**". It is not like other
operators. Its right operand is always Integer (of which Natural is a
subtype). Therefore, knowing that I is an integer is *not* enough to
determine the type of the left operand. The type of 10, and the type
of 10**I, cannot be determined until you look at the larger context,
which means that this:
> Things look like
> if the left-hand side of "<" has a consequence on the interpretation of
> its right-hand side.
is exactly correct. The compiler can't determine the type of 10 or
10**I until it sees the left-hand side of "<".
-- Adam
next prev parent reply other threads:[~2012-02-07 18:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-07 17:24 Weird behavior with modular type Yannick Duchêne (Hibou57)
2012-02-07 17:49 ` Jeffrey Carter
2012-02-07 18:06 ` Adam Beneschan
2012-02-07 18:21 ` Yannick Duchêne (Hibou57)
2012-02-08 6:53 ` J-P. Rosen
2012-02-08 15:29 ` Adam Beneschan
2012-02-09 3:37 ` Randy Brukardt
2012-02-07 18:15 ` Yannick Duchêne (Hibou57)
2012-02-07 17:53 ` Adam Beneschan
2012-02-07 17:54 ` Gautier write-only
2012-02-07 18:23 ` Yannick Duchêne (Hibou57)
2012-02-09 3:40 ` Randy Brukardt
2012-02-07 18:02 ` Adam Beneschan
2012-02-07 18:32 ` Georg Bauhaus
2012-02-07 18:13 ` Yannick Duchêne (Hibou57)
2012-02-07 18:15 ` Adam Beneschan
2012-02-07 18:35 ` Yannick Duchêne (Hibou57)
2012-02-07 18:40 ` Adam Beneschan [this message]
2012-02-07 19:22 ` Yannick Duchêne (Hibou57)
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