Re: gcc template question

From:

red floyd <redfloyd@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Fri, 28 Jan 2011 16:34:20 -0800 (PST)

Message-ID:

<832d20ea-691e-4834-ab40-2c9739788f10@8g2000prt.googlegroups.com>

On Jan 28, 3:39 pm, Chu Zhou <jmpop...@gmail.com> wrote:

On Jan 28, 5:05 pm, Ian Collins <ian-n...@hotmail.com> wrote:

On 01/29/11 10:59 AM, Chu Zhou wrote:

Hi, all here is my code:

template<class T>
class TBase
{
public:
  typedef int Int;

  struct TItem
  {
   T Data;
  };

  int value;
};

template<class T>
class TClass:public TBase<T>
{
public:
  void func()
  {
   TBase<T>::value ++;
  }
};

int main(int argc, char *argv[])
{
  TClass<int> obj;
  return 0;
}

In VC and Borland C++ compiler, they both can compile it. But gcc
cannot compile it because it use two times to deal with template
things. VC or BCB do not care unknown template name. Is there any way
to suppress this function of gcc? Thank you!

Your problem description isn't very helpful! Which gcc version are y=

using and what errors do you get?

The code looks OK and compiles with g++ 3.4.3 and 4.3.4.

--
Ian Collins

Thanks a lot!

Sorry for the wrong code I post on. The real error one is here:

template<class T>
class TBase
{
public:
typedef int Int;

struct TItem
{
T Data;
};

int value;

};

template<class T>
class TClass:public TBase<T>
{
public:
TBase<T>::TItem item; // error happened when using type defined in
base classes

This line should read

typename TBase<T>::TItem item;

gcc is correct here, VC and BCB are not.

void func()
{
TBase<T>::value ++; // no error here
}

};

int main(int argc, char *argv[])
{
TClass<int> obj;
return 0;

}