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jonas.ritter@gmx.de
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 Posted: Tue Dec 13, 2005 6:33 pm Post subject: template.cpp:9: error: too few template-parameter-lists |
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I tried to compile the following code with g++ 3.4 and 4.0 and got the
error:
#include <iostream>
template <class T> class X {
static X<T> * xp;
};
X<int> * X<int>: p = NULL;
int main() {
return 0;
}
with g++ 3.2 it works
was something changed in the compiler or in c++ standard?
do I need to write the code differently?
Thanks
Jonas
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Thomas Tutone
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| Posted: Tue Dec 13, 2005 11:02 pm Post subject: Re: template.cpp:9: error: too few template-parameter-lists |
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[email]jonas.ritter (AT) gmx (DOT) de[/email] wrote:
| Quote: | I tried to compile the following code with g++ 3.4 and 4.0 and got the
error:
#include <iostream
template
static X<T> * xp;
};
X<int> * X<int>:p = NULL;
|
change the above line to template<> X<int> * X<int>:p = 0;
(I'm not sure whether including <iostream> necessarily results in
defining NULL.)
| Quote: |
int main() {
return 0;
}
with g++ 3.2 it works
was something changed in the compiler or in c++ standard?
|
The later versions of gcc are more conforming to the standard.
| Quote: | do I need to write the code differently?
|
As shown above.
Best regards,
Tom
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Thomas Maeder
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| Posted: Wed Dec 14, 2005 6:11 am Post subject: Re: template.cpp:9: error: too few template-parameter-lists |
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"jonas.ritter (AT) gmx (DOT) de" <jonas.ritter (AT) gmx (DOT) de> writes:
| Quote: | I tried to compile the following code with g++ 3.4 and 4.0 and got the
error:
#include <iostream
template
static X<T> * xp;
};
X<int> * X<int>:p = NULL;
|
Side note: NULL is not declared here.
| Quote: | int main() {
return 0;
}
with g++ 3.2 it works
was something changed in the compiler or in c++ standard?
|
The compiler was made more conforming.
| Quote: | do I need to write the code differently?
|
template <>
X<int> * X<int>:p = NULL;
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Gene Bushuyev
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| Posted: Wed Dec 14, 2005 6:13 am Post subject: Re: template.cpp:9: error: too few template-parameter-lists |
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<jonas.ritter (AT) gmx (DOT) de> wrote
| Quote: | I tried to compile the following code with g++ 3.4 and 4.0 and got the
error:
#include <iostream
template
static X<T> * xp;
};
X<int> * X<int>:p = NULL;
int main() {
return 0;
}
with g++ 3.2 it works
was something changed in the compiler or in c++ standard?
do I need to write the code differently?
|
No, the standard didn't change, rather the compilers are getting better.
In your code, you missed the template<> to define the explicit specialization:
template<>
X<int>* X<int>:p = NULL;
-- Gene Bushuyev
----------------------------------------------------------------
There is no greatness where there is no simplicity, goodness and truth. ~ Leo
Tolstoy
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kanze
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| Posted: Wed Dec 14, 2005 3:41 pm Post subject: Re: template.cpp:9: error: too few template-parameter-lists |
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Thomas Tutone wrote:
| Quote: | jonas.ritter (AT) gmx (DOT) de wrote:
I tried to compile the following code with g++ 3.4 and 4.0
and got the error:
#include <iostream
template
static X<T> * xp;
};
X<int> * X<int>:p = NULL;
change the above line to template<> X<int> * X<int>:p = 0;
(I'm not sure whether including <iostream> necessarily results
in defining NULL.)
|
It's undefined. In the case of g++, <iostream> does define
NULL, so it's not his problem, but he should really add an
#include <stddef.h> or #include <cstddef>, just to be sure.
As other's have pointed out, his real problem is the absense of
a template<>. Without that, his code doesn't compile, neither
with NULL nor with 0.
--
James Kanze GABI Software
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34
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Thomas Tutone
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| Posted: Wed Dec 14, 2005 9:00 pm Post subject: Re: template.cpp:9: error: too few template-parameter-lists |
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kanze wrote:
| Quote: | Thomas Tutone wrote:
[email]jonas.ritter (AT) gmx (DOT) de[/email] wrote:
I tried to compile the following code with g++ 3.4 and 4.0
and got the error:
#include <iostream
template
static X<T> * xp;
};
X<int> * X<int>:p = NULL;
change the above line to template<> X<int> * X<int>:p = 0;
(I'm not sure whether including <iostream> necessarily results
in defining NULL.)
It's undefined. In the case of g++, <iostream> does define
NULL, so it's not his problem, but he should really add an
#include <stddef.h> or #include <cstddef>, just to be sure.
As other's have pointed out, his real problem is the absense of
a template<>. Without that, his code doesn't compile, neither
with NULL nor with 0.
|
I agree. Please look back at my suggested correction - it includes the
missing template<>. The parenthetical reference to the NULL problem
was just an aside.
Best regards,
Tom
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