...one of the most highly
regarded and expertly designed C++ library projects in the
world. — Herb Sutter and Andrei
template-varargs — Declares a variable-length list of template parameters
Variable-length template parameter lists are not allowed in C++, but because they are sometimes needed in documentation they are allowed in BoostBook. This element generally expands to "..." and can be used anywhere any other template parameter can be used.