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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: Hexadecimal float constants
Date: Mon, 12 Jun 2017 17:00:25 -0700
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supercat@casperkitty.com writes:
[...]
> Say that a PP-number contains a 0-9 followed by any subsequent characters
> matching [0-9A-Za-z\.] would entail fewer rules.

And it would mean that .123 is not a PP-number.

[...]

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"