SentinelArray

Simple static 1D array which adds variable end support to std::array.

GPU kernel friendly. Handy for variable data size when vector cannot be used

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Use case:

std::array<int,4>

0	1	2	3

SentinelArray<int, 4>({42, 1337})

42	1337	xxx	xxx

           ^^^^^^^^^^^^^
           uninitialized and wasted memory space

Sentinel value is 2 is this case.

Using iterators, you will have access to 42 and 1337.

std::vector<int> v{100,200,300};
SentinelArray<int, 10> a(v.begin(), v.end())  // 7 undefined values after 3rd element
for (auto i : a)
 std::cout << i << ",";

100,200,300

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TODO list:

• Add tests !!!!!
• Implement better GPU macros support (__global__, KOKKOS_*, etc.)
• Add override method or support for :
  • fill
  • swap
  • operator==
  • operator!=
  • operator<
  • operator<=
  • operator>
  • operator>=
  • operator<=>
  • std::get
  • std::swap
  • to_array
  • std::tuple_size
• Add __cplusplus macro check and write constexpr methods for std > c++17. Reminder:
  • C++ pre-C++98: __cplusplus is 1`
  • C++98: __cplusplus is 199711L
  • C++11: __cplusplus is 201103L
  • C++14: __cplusplus is 201402L
  • C++17: __cplusplus is 201703L
  • C++20: __cplusplus is 202002L