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From: antispam@fricas.org (Waldek Hebisch)
Newsgroups: comp.lang.c
Subject: Re: C23 on MSVC
Date: Sat, 25 Jan 2025 23:36:41 -0000 (UTC)
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Jack Lemmon <noreply@mandrill.com> wrote:
> On 22/01/2025 05:41, Lawrence D'Oliveiro wrote:
>> On Wed, 22 Jan 2025 02:45:20 +0000, Jack Lemmon wrote:
>> 
>>> Microsoft's main language is C# and they are investing a lot on it. They
>>> want C# to be the main language for everyday use.
>> 
>> What did they write C♯ in, though?
>> 
> 
> First release was written in assembly code. Subsequent releases are in 
> C# itself. The c# language is class based object oriented, so you don't 
> need anything else to expand the language. Just write a new object and 
> compile it to be used by other objects. This is the same as in C or C++. 
> First release were in assembly and any enhancement were in the same 
> language = C or C++ respectively.

Do you have insider info?  Writing substantial piece of code in
nineties using assembler would be highly unusual.  Slightly
earlier Microsoft supposedly had a rule that all code should
be in C (presumably with exceptions for lowest level machine
dependencies and some performance critical parts, but both
should be relatively small).

Also, when a company has compilers for multiple languages, it
is natural to share substantial part for other languages.  In
case of gcc Ada front-end is in Ada, but most work is in "middle
end" that is common to all compilers in gcc and is written in C++.
I would guess that now Microsoft C compiler is written in C++.

-- 
                              Waldek Hebisch