Struct template optional_ref

Struct template optional_ref

boost::text::optional_ref

Synopsis

// In header: <boost/text/trie.hpp>

template<typename T, bool Const = std::is_const<T>::value> 
struct optional_ref {
  // construct/copy/destruct
  optional_ref();
  optional_ref(T &);
  template<typename U> auto operator=(U &&);

  // public member functions
  explicit operator bool() const;
  explicit operator bool();
  explicit operator bool();
  T const & operator*() const;
  T const * operator->() const;
  operator T const &() const;
  operator T const &() const;
  T & operator*();
  T * operator->();
  operator T&();
  operator T&();
};

Description

An optional reference. Its optionality is testable, via the operator bool() members, and it is implicitly convertible to the underlying value type.

`optional_ref` public construct/copy/destruct

```
optional_ref();
```
```
optional_ref(T & t);
```

template<typename U> auto operator=(U && u);

`optional_ref` public member functions

```
explicit operator bool() const;
```
```
explicit operator bool();
```
```
explicit operator bool();
```
```
T const & operator*() const;
```
```
T const * operator->() const;
```
```
operator T const &() const;
```
```
operator T const &() const;
```
```
T & operator*();
```
```
T * operator->();
```
```
operator T&();
```
```
operator T&();
```