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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109936

--- Comment #10 from Andreas Schwab <schwab@linux-m68k.org> ---
> The standard says "Each preprocessing token that is converted to a token
> (5.6) shall have the lexical form of a keyword, an identifier, a literal,=
 or
> an operator or punctuator."

The argument of the macros is not converted to a token, but discarded in ph=
ase
4.

> =E2=89=A0 cannot be used in an identifier, and it's none of the other for=
ms either.

It is a valid preprocessing token ("non-whitespace character that cannot be=
 one
of the above").=