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Date: Tue, 25 Jun 2013 21:48:37 +1000
Subject: Re: n00b question on spacing
From: Chris Angelico <rosuav@gmail.com>
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Xref: csiph.com comp.lang.python:49147

On Tue, Jun 25, 2013 at 9:19 PM, Robert Kern <robert.kern@gmail.com> wrote:
> There is quite a bit of Python's lexical analysis that is specified in
> places other than the formal notation. That does not mean it is undefined.
> It is well defined in the lexer code and the documentation. You suggest that
> a "rule probably should be added to the lexer to make this explicit." That
> is not necessary. The rule is already there.

Be careful; Python is not an implementation-defined language. Python
has no "lexer code" - CPython does, and is probably what you're
thinking of. (There are other languages that *are*
implementation-defined, meaning that it *is* correct to talk about
features in that way. Python just isn't one of them.) Sometimes a rule
needs to be clarified to mandate something that was previously left up
to the implementation; however, if that's the case, the rule would not
be added to the lexer, but to the documentation.

ChrisA