GCC 3.2 compiler error using Boost::Threads::Mutex::scoped_lock

4 Mar 2003

      Disclaimer: I am relatively new to gcc, linux and Boost.  I'm hoping 
someone out in the group who is much more knowledgable about all of them 
can help me get past a hurdle in code I am porting from Windows.  I am 
getting a vague error message from g++ (gcc 3.2-7 under Redhat Linux 8.0) 
in my code using the Boost scoped_lock.

I have wrapped the Boost versions of mutex and  mutex::scoped_lock as:
class PMutex
{
public:
         PMutex() {}
         virtual ~PMutex() {}

protected:
         boost::mutex    m_Mutex;
         friend class PScopedLock;
};

class PScopedLock
{
public:
         explicit PScopedLock( PMutex& M )       : m_ScopedLock(M.m_Mutex) {}
         virtual ~PScopedLock() {}

         static PScopedLock*     Create( PMutex& M ) { return 
(PScopedLock*) ::new PScopedLock(M); }
         void Destroy( void ) { delete this;     }

protected:
         void* operator new(size_t) {}   // disallowed, must declare on the 
stack
         boost::mutex::scoped_lock       m_ScopedLock;
         friend class PCondition;
};

The error is "ISO C++ forbids declarations of 'type name' with no type".  I 
get that error on several lines, but most notably on a simple declaration like:
         PScopedLock     Lock(MyMutex);

 From what little I can find on the newsgroups, this sort of error has been 
noted when use of template template parameters are not declared quite 
correctly (without the trailing ::template from what I can gather).  But as 
far as I can tell, I should not be having that issue.  I am not 
knowledgeable enough about templates, Boost or gcc/g++ to sort out what I 
am running into.  Boost builds fine under gcc, the code I am porting 
compiles fine under MSVC6 and Kylix3, but not gcc.  Can anyone help me out?

thanks.
michael

GCC 3.2 compiler error using Boost::Threads::Mutex::scoped_lock

Michael Hunley