Base class omitted if it's a template parameter

[cbiffle]

The description of a class template includes a "Bases" section, but leaves it empty, when the only base is a template parameter to that class template.

Found in b3fc442

Input

template <typename T>
struct Unit : T {};

Output

Notes

This pattern is not as contrived as it may seem. It arises in some types of policy-based class factoring (as in Alexandrescu's Modern C++ Design) and also in template metaprogramming.