模板类的小问题~

[CT8100]

template <bool del, class R, class T>
class _ConstTessMemberResultCallback_0_0 : public TessResultCallback<R> {
 public:
  typedef TessResultCallback<R> base;
  typedef R (T::*MemberSignature)() const;

 private:
  const T* object_;
  MemberSignature member_;

 public:
  inline  _ConstTessMemberResultCallback_0_0(
     const T* object, MemberSignature member)
    : object_(object),
      member_(member) {
  }

  virtual R Run() {
    if (!del) {
      R result = (object_->*member_)();
      return result;
    } else {
      R result = (object_->*member_)();
      //  zero out the pointer to ensure segfault if used again
      member_ = NULL;
      delete this;
      return result;
    }
  }
};

template <bool del, class T>
class _ConstTessMemberResultCallback_0_0<del, void, T>
  : public TessClosure {
 public:
  typedef TessClosure base;
  typedef void (T::*MemberSignature)() const;

 private:
  const T* object_;
  MemberSignature member_;

 public:
  inline _ConstTessMemberResultCallback_0_0(
      const T* object, MemberSignature member)
    : object_(object),
      member_(member) {
  }

  virtual void Run() {
    if (!del) {
      (object_->*member_)();
    } else {
      (object_->*member_)();
      //  zero out the pointer to ensure segfault if used again
      member_ = NULL;
      delete this;
    }
  }
};

error C2989: '_ConstTessMemberResultCallback_0_0<del,void,R>' : template class has already been defined as a non-template class
这个应该没有问题把。。。。

[零隐]

已经定义过了。你试着换参数数目和名称看下。

[worldy]

_ConstTessMemberResultCallback_0_0重复定义

[zgl7903]

https://msdn.microsoft.com/zh-cn/library/b25sbd9x.aspx

[CT8100]

这个问题解决了谢谢大家帮忙~