Merge branch 'dynarray_dim0' into 'master'

dynamic array doc

See merge request correaa/boost-multi!1756

Author: correaa

.gitlab-ci-correaa.yml

@@ -1488,11 +1488,13 @@ conan:
   needs: ["g++"]
 
 github-ci-status:
-  stage: build
+  stage: test
   interruptible: true
   script:
-    - apt-get -qq update && apt-get -qq install --no-install-recommends -y curl jq
-    - STATUS=$(curl -s -H "Accept:application/vnd.github+json" https://api.github.com/repos/correaa/boost-multi/actions/workflows/ci.yml/runs?branch=$CI_COMMIT_BRANCH\&per_page=1 | jq -r .workflow_runs[0].conclusion)
+    - apt-get -qq update && apt-get -qq install --no-install-recommends -y ca-certificates curl jq
+    - RESPONSE=$(curl -s -H "Accept:application/vnd.github+json" "https://api.github.com/repos/correaa/boost-multi/actions/workflows/ci.yml/runs?branch=${CI_COMMIT_BRANCH}&per_page=1")
+    - echo "GitHub API response $RESPONSE"
+    - STATUS=$(echo "$RESPONSE" | jq -r .workflow_runs[0].conclusion)
     - echo "GitHub CI status $STATUS"
     - test "$STATUS" = "success"
-  needs: ["g++","clang++","cuda","nvhpc","oneapi"]
+  needs: ["g++","cuda","nvhpc","clang++-latest tidy iwyu everything"]

include/boost/multi/array.hpp

@@ -793,8 +793,14 @@ using static_array [[deprecated("static_array has been renamed to dynamics_array
 #pragma clang diagnostic pop
 #endif
 
+/// A specialization for zero dimensions
+///
+/// The array might or might not contain an element
+///
+/// @tparam T Element type
+/// @tparam Alloc Allocator type
 template<typename T, class Alloc>
-struct dynamic_array<T, ::boost::multi::dimensionality_type{0}, Alloc>  // NOLINT(fuchsia-multiple-inheritance,misc-multiple-inheritance) : design
+struct dynamic_array<T, 0, Alloc>  // NOLINT(fuchsia-multiple-inheritance,misc-multiple-inheritance) : design
 : protected detail::array_allocator<Alloc>
 , public array_ref<T, 0, typename multi::allocator_traits<typename detail::array_allocator<Alloc>::allocator_type>::pointer> {
 	static_assert(std::is_same_v<typename multi::allocator_traits<Alloc>::value_type, typename dynamic_array::element_type>, "allocator value type must match array value type");