Does the typename keyword make sense here?

[Exits Funnel]

Hello,

I've inherited a bunch of C++ code which was developed on Windows and
I'm in the process of trying to port it to Linux/g++. The following is
similar to one very small piece of the code:

//Begin test1.cpp
template<class B>
class CHB
{ };

template <typename B>

struct BCBT
{
typedef typename CHB<B> BCB;
};
//End test1.cpp

When I try to compile the above, g++ complains thusly:

test1.cpp:9 syntax error before ';' token.

Presumably, this code compiles under MS Visual Studio 7.1. If I remove
the 'typename' from line nine, it's compilable under g++. Two questions
then:

1) Is it legal. In other words, should g++ complain?
2) If it is legal, what does it do? It's not clear to me what purpose
typname would serve in this particular context.

Thanks!

-exits

 

[Sharad Kala]

Hello,

When I try to compile the above, g++ complains thusly: [snip]
test1.cpp:9 syntax error before ';' token.

Presumably, this code compiles under MS Visual Studio 7.1. If I remove
the 'typename' from line nine, it's compilable under g++. Two questions
then:

1) Is it legal. In other words, should g++ complain?

No, it isn't . g++ is correct.

2) If it is legal, what does it do? It's not clear to me what purpose
typname would serve in this particular context.

Sharad