Merge pull request #46 from lanl/bkk_static_vector

Transfer static vector from Singe

doc/sphinx/src/using.rst

@@ -230,3 +230,14 @@ not yet ``constexpr``, so even with the "relaxed ``constexpr``" compilation mode
 not feature-complete on GPUs. This will change when those member functions become ``constexpr`` in
 C++20.
 
+static_vector.hpp
+^^^^^^^^^^^^^^^^^
+
+``PortsOfCall::static_vector`` is a GPU-compatible data structure that provides a
+``std::vector``-like interface, but uses ``std::array``-like backing storage. That means that the
+size is variable, but the capacity is fixed at runtime. This allows the creation of a data
+structure of non-default-constructible objects like with a ``std::vector``. This also allows the
+type to be self-contained: no pointers, so a ``PortsOfCall::static_vector`` can be memcopied
+between CPU and GPU. It is related to a `proposed data structure
+https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p0843r8.html`_ that may be included in a
+future C++ standard.