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NNTP-Posting-Date: Thu, 16 Feb 2012 23:40:21 -0600
From: Nathan <nathancbaker@gmail.com>
Subject: Re: Name space pollution in Art of Assembly
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Date: Thu, 16 Feb 2012 21:38:59 -0800 (PST)
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On Feb 16, 3:47=A0pm, Joseph <f...@nospicedham.none.com> wrote:
> I hope it's okay to ask a question about a specific book in this group

It certainly is okay.

> (and a book about HLA at that),

That is okay too.

> but I'm working my way through Randall
> Hyde's The Art of Assembly Language Programming, and I have an issue with
> chapter 9.9 "Name Space Pollution" (http://homepage.mac.com/randyhyde/
> webster.cs.ucr.edu/www.artofasm.com/Linux/HTML/
> ManagingLargePrograms2.html). It says:
>
> =A0"conflicts will only occur between [...] external symbols and [...]
> global symbols,"
>
> and
>
> =A0"when you declare external names within a name space, [...] HLA uses
> only the function name [...] as the external name. This creates a name
> space pollution problem in the external name space [therefore] use the
> extended form of the EXTERNAL directive to explicitly supply an external
> name for all external identifiers appearing in a NAMESPACE declaration."
>
> So a symbol cannot conflict if it is not external, and an external symbol
> must use a unique name; but then what purpose is the name space?

Your question is not about any specific book, nor is it specific to
HLA.  You will find your answer here:

http://en.wikipedia.org/wiki/Namespace

http://en.wikipedia.org/wiki/Namespace_%28computer_science%29

{news:comp.programming added}

Nathan.
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