adding back free functions for [c|cr][begin|end]

2020-04-14 16:57:12 -07:00
parent 7341c5d1b5
commit 9cb376c050
2 changed files with 40 additions and 0 deletions
@@ -165,6 +165,34 @@ rend(const span<ElementType, Extent>& s) noexcept
    return s.rend();
 }

+template <class ElementType, std::size_t Extent>
+constexpr typename span<ElementType, Extent>::iterator
+cbegin(const span<ElementType, Extent>& s) noexcept
+{
+    return s.begin();
+}
+
+template <class ElementType, std::size_t Extent = dynamic_extent>
+constexpr typename span<ElementType, Extent>::iterator
+cend(const span<ElementType, Extent>& s) noexcept
+{
+    return s.end();
+}
+
+template <class ElementType, std::size_t Extent>
+constexpr typename span<ElementType, Extent>::reverse_iterator
+crbegin(const span<ElementType, Extent>& s) noexcept
+{
+    return s.rbegin();
+}
+
+template <class ElementType, std::size_t Extent>
+constexpr typename span<ElementType, Extent>::reverse_iterator
+crend(const span<ElementType, Extent>& s) noexcept
+{
+    return s.rend();
+}
+
 } // namespace gsl

 #endif // GSL_SPAN_EXT_H