🚀 go-pugleaf

As I'm reading the lexical rules of the standard, it appears to me that, as
early as translation phase 3, the file is decomposed into a stream of
preprocessing tokens and the `sizeof' string is then converted into the
`operator' token as listed in section 3.1.5.  If so, this prohibits the use
of `sizeof' as an identifier anywhere in a program, including in the syntax
rule for defining macros, which reads like this:

# define identifier replacement-list new-line
# define identifier lparen replacement-list ) new-line

because preprocessor directives execution and macro substitution occurs at
translation phase 4.

Trying this with gcc and c89 (HP), both accepted `sizeof' as a valid
identifier.  The code violating a syntax rule, shouldn't the compilers
issue a diagnostic for that?

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Daniel Villeneuve                       Tel: +1 514 340 6046
Graduate student in Operations Research Fax: +1 514 340 5665
GERAD/Mathematiques Appliquees          Email: danielv@crt.umontreal.ca
Ecole Polytechnique de Montreal