* template(s) declaration with GCC3.2-7
@ 2003-04-22 16:34 Rade Trimceski
2003-04-22 16:48 ` John Love-Jensen
0 siblings, 1 reply; 5+ messages in thread
From: Rade Trimceski @ 2003-04-22 16:34 UTC (permalink / raw)
To: gcc-help
Hey guys (and girls if there are any) :)
I'm trying to compile code that was written a while ago, and compiled
just fine with gcc 2.96. GCC 3.2-7 doesn't like it at all. Here's the
code as I extracted it from the header file:
[rtrimces@Vaio tests]#cat template_test.cpp
#include <list>
template <class _Tp>
class LsList : public list<_Tp> {
public:
typedef list<_Tp> baseList;
LsList() : baseList() {}
LsList(const _Tp& x) : baseList(1, x) {}
void eraseAll() {
baseList::erase(begin(), end());
}
LsList<_Tp>& operator= (const LsList<_Tp> & x) {
return (LsList<_Tp> &)baseList::operator= (x);
}
};
When trying to compile I get the following errors:
[rtrimces@Vaio tests]# g++ -o template.o template_test.cpp
template_test.cpp:4: parse error before `<' token
template_test.cpp:7: ISO C++ forbids declaration of `LsList' with no
type
template_test.cpp: In function `int LsList()':
template_test.cpp:7: `int LsList()' redeclared as different kind of
symbol
template_test.cpp:4: previous declaration of `template<class _Tp> class
LsList'
template_test.cpp:4: previous non-function declaration `template<class
_Tp>
class LsList'
template_test.cpp:7: conflicts with function declaration `int LsList()'
template_test.cpp:7: only constructors take base initializers
template_test.cpp:7: confused by earlier errors, bailing out
Can someone tell me what has changed with the compiler and why this code
doesn't compile anymore? Even better answer would be how should I write
this code in order to make it compile with gcc 3.2.
Thanks a lot!
Rade
P.S.
In case you are wondering:
[rtrimces@Vaio tests]# g++ --version
g++ (GCC) 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: template(s) declaration with GCC3.2-7
2003-04-22 16:34 template(s) declaration with GCC3.2-7 Rade Trimceski
@ 2003-04-22 16:48 ` John Love-Jensen
2003-04-22 22:37 ` More template(s) errors " Rade Trimceski
2003-04-23 18:58 ` please unsubscribe claudio
0 siblings, 2 replies; 5+ messages in thread
From: John Love-Jensen @ 2003-04-22 16:48 UTC (permalink / raw)
To: Rade Trimceski, gcc-help
Have you tried...
Line 4: class LsList : public std::list<_Tp> {
...?
--Eljay
^ permalink raw reply [flat|nested] 5+ messages in thread
* More template(s) errors with GCC3.2-7
2003-04-22 16:48 ` John Love-Jensen
@ 2003-04-22 22:37 ` Rade Trimceski
2003-04-23 0:20 ` Oscar Fuentes
2003-04-23 18:58 ` please unsubscribe claudio
1 sibling, 1 reply; 5+ messages in thread
From: Rade Trimceski @ 2003-04-22 22:37 UTC (permalink / raw)
To: gcc-help
Can someone demystify this error for me?
It comes out of a header file, and this did compile with gcc 2.96.
typedef hash_map<int, Neighbor_Entry *> Neighbors_Hash;
the compilation error is:
In file included from diffusion3/apps/gear/geo-routing.cc:11:
diffusion3/apps/gear/geo-routing.hh:187: syntax error before `;' token
Any ideas why I get the syntax error, and what it really means?
Thanks a lot!
Rade
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: More template(s) errors with GCC3.2-7
2003-04-22 22:37 ` More template(s) errors " Rade Trimceski
@ 2003-04-23 0:20 ` Oscar Fuentes
0 siblings, 0 replies; 5+ messages in thread
From: Oscar Fuentes @ 2003-04-23 0:20 UTC (permalink / raw)
To: gcc-help
Rade Trimceski <rtrimces@mtu.edu> writes:
> Can someone demystify this error for me?
>
> It comes out of a header file, and this did compile with gcc 2.96.
>
> typedef hash_map<int, Neighbor_Entry *> Neighbors_Hash;
>
> the compilation error is:
>
> In file included from diffusion3/apps/gear/geo-routing.cc:11:
> diffusion3/apps/gear/geo-routing.hh:187: syntax error before `;' token
>
>
> Any ideas why I get the syntax error, and what it really means?
Well, the error message is not a great help on this case. What really
happens is that 'hash_map' is an unknown template for the compiler.
GCC 3.x comes with a new Standard C++ Library implementation, which is
far more conformant than the previous one. All standard C++ library
names are on namespace 'std'.
For this specific case, 'hash_map' is not a standard C++ library
template. However, the GNU implementors added it for supporting old
code (and as a nice extension, I guess). It's on namespace __gnu_cxx,
implemented on <ext/hash_map>.
I think this issues are explained on some README on the GCC
distribution or on the website. The 'std' namespace thing is something
every C++ developer should know since a long time ago, though.
--
Oscar
^ permalink raw reply [flat|nested] 5+ messages in thread
* please unsubscribe
2003-04-22 16:48 ` John Love-Jensen
2003-04-22 22:37 ` More template(s) errors " Rade Trimceski
@ 2003-04-23 18:58 ` claudio
1 sibling, 0 replies; 5+ messages in thread
From: claudio @ 2003-04-23 18:58 UTC (permalink / raw)
To: gcc-help
^ permalink raw reply [flat|nested] 5+ messages in thread
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2003-04-22 16:34 template(s) declaration with GCC3.2-7 Rade Trimceski
2003-04-22 16:48 ` John Love-Jensen
2003-04-22 22:37 ` More template(s) errors " Rade Trimceski
2003-04-23 0:20 ` Oscar Fuentes
2003-04-23 18:58 ` please unsubscribe claudio
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