In <[email protected]>, Bob McGowan wrote: >Boyd Stephen Smith Jr. wrote: >> 3. Lines starting with a single '#' are comments in C *unless* the '#' >> is immediately followed by a pre-processor command. This is similar -- >> you can think of update-grub as a GRUB menu.lst pre-processor. > >The sharp/hash symbol is a preprocessor indicator. "Pure" C has never >supported anything other than '/*...*/' for comments. C++ added the >single line comment marker '//' (double forward slash).
From the latest C standard:
6.10 Preprocessing directives
Syntax
preprocessing-file:
groupopt
group:
group-part
group group-part
group-part:
if-section
control-line
text-line
# non-directive
[...]
A text line shall not begin with a # preprocessing token. A non-directive
shall not begin with any of the directive names appearing in the syntax.
>It is possible to use the preprocessor to do weird and wonderful,
>things, so I believe you could even have it ignore lines beginning with
>a hash mark, effectively treating them as comments, but that is
>definitely not "normal".
From what I can tell, there's no additional requirements on the
implementation for what to do with non-directives, but traditional C
compilers would ignore them -- effectively making them comments. Since the
standard doesn't specify what to do with them, any behavior is acceptable.
I agree that they are not standard comments and are not accepted by your C
compiler, which might be conforming. (FWIW, I don't believe gcc is
completely conforming.)
--
Boyd Stephen Smith Jr. ,= ,-_-. =.
[email protected] ((_/)o o(\_))
ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-'
http://iguanasuicide.net/ \_/
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