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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: How do I write directly to a memory address?
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Date: Tue, 8 Feb 2011 19:14:00 +0100
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On Mon, 7 Feb 2011 15:11:23 -0800 (PST), Maciej Sobczak wrote:

> On Feb 7, 10:24�am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
> wrote:
> 
>>> The contract is not broken. The function cannot modify the original
>>> value that is passed by copy (this being the very nature of "copy")
>>> and the caller cannot even reason about what happens behind the
>>> signature.
>>
>> It is broken because const T is not substitutable for T. Mutators of the
>> type T are not operations of const T. q.e.d.
> 
> q.e.d. what?

1. const T /= T
2. not (const T <: T)

> I have an impression that we are (again) in the mode where you bring
> arbitrarily twisted definitions in order to prove your point.
> 
> What contract is broken?
> 
> Why do you want to substitute one type by another?

Because one is passed as a parameter where another is declared, expected
and used. This is substitution.

> These are not
> generics, nor other type-dependent constructs, so type substitutions
> are out of the picture.

Not at all. const T and T are distinct [sub]types. The types are different
because the sets of operations defined on them are.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de