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cppdraft/any/observers.md

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+[any.observers]
+
+# 22 General utilities library [[utilities]](./#utilities)
+
+## 22.7 Storage for any type [[any]](any#observers)
+
+### 22.7.4 Class any [[any.class]](any.class#any.observers)
+
+#### 22.7.4.5 Observers [any.observers]
+
+[🔗](#lib:has_value,any)
+
+`bool has_value() const noexcept;
+`
+
+[1](#1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L7505)
+
+*Returns*: true if *this contains an object, otherwise false[.](#1.sentence-1)
+
+[🔗](#lib:type,any)
+
+`const type_info& type() const noexcept;
+`
+
+[2](#2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L7516)
+
+*Returns*: typeid(T) if *this has a contained value of type T,
+otherwise typeid(void)[.](#2.sentence-1)
+
+[3](#3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/utilities.tex#L7521)
+
+[*Note [1](#note-1)*:
+
+Useful for querying against types known either at compile time or only at runtime[.](#3.sentence-1)
+
+— *end note*]