Exits Funnel wrote:[color=blue]
> Hello,
>
> I've been tasked with porting some C++ code from Windows to Linux. The
> following excerpt is giving me trouble:
>
> //BEGIN CODE
> #include <string>
>
> class TempTestBase_t
> {
> std::string m_Name; // what's my name?
> public:
> TempTestBase_t(const char *const pName) : m_Name (pName) // copy
> name for self
> { }
> };
>
> template<typename T>
> class TempTest_t
> : public TempTestBase_t
> {
> public:
> TempTest_t (const char *const pName);
> };
>
> template<typename T>
> TempTest_t<T>::TempTest_t (const char *const pName): m_Name (pName)
> { }
> //END EXCERPT
>
> When I issue 'g++ -c -o temptest temptest.cpp', g++ (version Red Hat
> Linux 3.2.3 - 42) complains thusly:
>
> temptest.cpp: In constructor `TempTest_t<T>::TempTest_t(const char*)':
> temptest.cpp:5: `std::string TempTestBase_t::m_Name' is private
> temptest.cpp:29: within this context
>
> NOTE: The line numbers in the errors don't correspond exactly with the
> above code because after cutting pasting there were issues with the
> newlines.
>
> Presumably, this code compiles on windows. So, is g++ broken or is
> there really a problem with the code? It looks okay to me but I'm no
> template expert. Thanks in advance for any thoughts.
>[/color]
No, g++ is right.
Consider the offending constructor. In it you initialize the value of
`m_Name', which is a *private* member of the class from which you
inherit. As a pair of Liverpudlians wrote forty years ago, "You Can't Do
That".
Change the constructor to:
template<typename T>
TempTest_t<T>::TempTest_t (const char *const pName)
: TempTestBase_t (pName) // initialize the superclass
{ }
and all will be well.
Oh, and by the way, the fact that it's a template is orthogonal to your
problem.
HTH,
--ag
--
Artie Gold -- Austin, Texas
http://it-matters.blogspot.com (new post 12/5)
http://www.cafepress.com/goldsays 
