Hi,
In VS 2005 (SP1), the following code does not compile:
=============
typedef int _sptr ;
_sptr p = 1;
=============
the compiler emits the following:
source1.cpp(1) : warning C4091: 'typedef ' : ignored on left of 'int'
when no variable is declared
source1.cpp(2) : error C4430: missing type specifier - int assumed.
Note: C++ does not support default-int
After pulling half my hair out, I found that changing _sptr to almost
anything else (e.g. _sptr1), makes the code compile. Note that:
1. _sptr is not mentioned anywhere in the MSDN database.
2. I suspect that this didn't happen to me before upgrading my VS2005
to SP1.
3. Removing the '_' made the word 'sptr' change to blue as if a
keyword, again, sptr isn't mentioned in MSDN. (this happened on one
PC, on another it didn't).
Can anyone please help, what is _sptr?
Thanks,
Gil Moses. 3 1370
In article <11************ **********@y80g 2000hsf.googleg roups.com>,
<gi*@waves.comw rote:
>typedef int _sptr ;
Anything starting with an _ is reserved for the compiler. See http://www.mail-archive.com/cy****@c.../msg78723.html , or http://www.mozilla.org/hacking/porta...reserved_names
which quotes the C++ spec, section 17.4.3.1.2. Yes, a whole lot of
existing code violates this. No, this is not flagged as a warning,
though I think it should.
Short summary: you're violating C++ standards with your code
above. As you've already discovered, other names work. Use them.
Don't try to cry conspiracy or "hidden keyword" about _sptr, just do
the right thing and avoid leading underscores.
Nathan Mates
--
<*Nathan Mates - personal webpage http://www.visi.com/~nathan/
# Programmer at Pandemic Studios -- http://www.pandemicstudios.com/
# NOT speaking for Pandemic Studios. "Care not what the neighbors
# think. What are the facts, and to how many decimal places?" -R.A. Heinlein
Thanks Nathan for the enlightment.
Gil.
"Nathan Mates" <na****@visi.co mwrote in message
news:13******** *****@corp.supe rnews.com...
In article <11************ **********@y80g 2000hsf.googleg roups.com>,
<gi*@waves.comw rote:
>>typedef int _sptr ;
Anything starting with an _ is reserved for the compiler. See http://www.mail-archive.com/cy****@c.../msg78723.html , or http://www.mozilla.org/hacking/porta...reserved_names
which quotes the C++ spec, section 17.4.3.1.2. Yes, a whole lot of
existing code violates this. No, this is not flagged as a warning,
though I think it should.
Short summary: you're violating C++ standards with your code
above. As you've already discovered, other names work. Use them.
Don't try to cry conspiracy or "hidden keyword" about _sptr, just do
the right thing and avoid leading underscores.
It's still reasonable to ask what the keyword does, especially if the editor
is highlighting "sptr" (no underscore) as a keyword.
>
Nathan Mates
--
<*Nathan Mates - personal webpage http://www.visi.com/~nathan/
# Programmer at Pandemic Studios -- http://www.pandemicstudios.com/
# NOT speaking for Pandemic Studios. "Care not what the neighbors
# think. What are the facts, and to how many decimal places?" -R.A.
Heinlein
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