Template typedefs – What’s your work around?

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What do you like to use as work around ? Container objects or Macros ? Do you feel its worth it ?

The canonical way is to use a metafunction like thus:

template <typename T>
struct my_string_map {
    typedef std::map<std::string, T> type;
};

// Invoke:

my_string_map<int>::type my_str_int_map;

This is also used in the STL (allocator::rebind<U>) and in many libraries including Boost. We use it extensively in a bioinformatical library.

It’s bloated, but it’s the best alternative 99% of the time. Using macros here is not worth the many downsides.

(EDIT: I’ve amended the code to reflect Boost/STL conventions as pointed out by Daniel in his comment.)

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