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cppdraft/span/obs.md

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+[span.obs]
+
+# 23 Containers library [[containers]](./#containers)
+
+## 23.7 Views [[views]](views#span.obs)
+
+### 23.7.2 Contiguous access [[views.contiguous]](views.contiguous#span.obs)
+
+#### 23.7.2.2 Class template span [[views.span]](views.span#span.obs)
+
+#### 23.7.2.2.5 Observers [span.obs]
+
+[🔗](#lib:span,size)
+
+`constexpr size_type size() const noexcept;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L20773)
+
+*Effects*: Equivalent to: return *size_*;
+
+[🔗](#lib:span,size_bytes)
+
+`constexpr size_type size_bytes() const noexcept;
+`
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L20784)
+
+*Effects*: Equivalent to: return size() * sizeof(element_type);
+
+[🔗](#lib:span,empty)
+
+`constexpr bool empty() const noexcept;
+`
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L20795)
+
+*Effects*: Equivalent to: return size() == 0;