templated typedef?

Question

I\'m using libgc, a garbage collector for C and C++. To make STL containers garbage collectible one must use the gc_allocator.

Instead of writing

s         


        

Answer 1

You cannot use a "templated typedef", but you can use a convenience class/struct with an inner type:

template
struct TypeHelper{
    typedef std::vector > Vector;
};

and then use in your code

TypeHelper::Vector v;
TypeHelper::Vector::iterator it;

And something similar for the map:

template
struct MapHelper{
    typedef std::map > Map;
};

EDIT - @Vijay: I don't know if there's another possible workaround, that's how I would do it; a macro might give you a more compact notation, but personally I wouldn't like it:

#define GCVECTOR(T) std::vector >

EDIT - @chmike: Please note that the TypeHelper solution does not require you to redefine constructors!