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RE: C++ name with leading underscore character not Compiling
Hi,
Dave Korn wrote on 16 April 2007 12:29:
>
> Thanks for the correction. I'm referring to the C
> standard; I think C++ follows basically the same rules but
> don't have a spec handy to refer to.
The C++ standard is a little different, but the result in this case is
the same:-
"17.4.3.1.2/1
Certain sets of names and function signatures are always reserved
to the implementation:
- Each name that contains a double underscore (__) or begins with
an underscore followed by an uppercase letter (2.11) is reserved
to the implementation for any use.
- Each name that begins with an underscore is reserved to the
implementation for use as a name in the global namespace.
[such names are also reserved in namespace ::std (17.4.3.1)]"
This means that a single leading underscore is fine in local scope, as
long as it is not followed by an uppercase letter (I am only aware of
conflicts with a single upper-case character (eg. _L), but I think the
standard would also prevent _Local).
So, the case here ("_name" as an argument name) should be fine.
(This could have been an issue for my project, since we adopted the
convention of "leading underscore for member variables" before C++ had
been standardized. Fortunately, we also had adopted the convention of
using keeping the first letter of identifiers lower case.)
Tim.
=========================== cut here ============================
Tim Adye T.J.Adye@rl.ac.uk http://hepunx.rl.ac.uk/~adye
BaBar/Atlas Groups, Particle Physics Dept, Rutherford Appleton Lab
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