Struct value_view

boost::process::v2::environment::value_view — A view for a value in an environment.

Synopsis

// In header: <boost/process/v2/environment.hpp>


struct value_view {
  // types
  typedef char_type                                                      value_type;      
  typedef basic_cstring_ref< char_type, value_char_traits< char_type > > string_view_type;
  typedef std::basic_string< char_type, value_char_traits< char_type > > string_type;     
  typedef value_char_traits< char_type >                                 traits_type;     

  // construct/copy/destruct
  value_view();
  value_view(const value_view &) = default;
  value_view(value_view &&);
  template<typename Source, 
           typename  = typename std::enable_if<is_constructible<string_view_type, Source>::value>::type> 
    value_view(const Source &);
  value_view(const char_type *);
  value_view(char_type *);
  value_view & operator=(const value_view &) = default;
  value_view & operator=(value_view &&);
  value_view & operator=(string_view_type);
  ~value_view() = default;

  // public member functions
  void swap(value_view &) noexcept;
  string_view_type native() const noexcept;
  operator string_view_type() const;
  operator typename string_view_type::string_view_type() const;
  int compare(const value_view &) const noexcept;
  int compare(string_view_type) const;
  int compare(const value_type *) const;
  template<typename CharT, typename Traits = std::char_traits<CharT>, 
           typename Alloc = std::allocator<CharT> > 
    std::basic_string< CharT, Traits, Alloc > 
    basic_string(const Alloc & = Alloc()) const;
  std::string string() const;
  std::wstring wstring() const;
  string_type native_string() const;
  bool empty() const;
  value_iterator begin() const;
  value_iterator end() const;
  const char_type * c_str();
  const value_type * data() const;
  std::size_t size() const;
};

Description

`value_view` public construct/copy/destruct

```
value_view();
```

value_view(const value_view & p) = default;

```
value_view(value_view && p);
```

template<typename Source, 
         typename  = typename std::enable_if<is_constructible<string_view_type, Source>::value>::type> 
  value_view(const Source & source);

```
value_view(const char_type * p);
```
```
value_view(char_type * p);
```

value_view & operator=(const value_view & p) = default;

value_view & operator=(value_view && p);

value_view & operator=(string_view_type source);

```
~value_view() = default;
```

`value_view` public member functions

```
void swap(value_view & other) noexcept;
```

string_view_type native() const noexcept;

```
operator string_view_type() const;
```

operator typename string_view_type::string_view_type() const;

int compare(const value_view & p) const noexcept;

int compare(string_view_type str) const;

int compare(const value_type * s) const;

template<typename CharT, typename Traits = std::char_traits<CharT>, 
         typename Alloc = std::allocator<CharT> > 
  std::basic_string< CharT, Traits, Alloc > 
  basic_string(const Alloc & alloc = Alloc()) const;

```
std::string string() const;
```
```
std::wstring wstring() const;
```
```
string_type native_string() const;
```
```
bool empty() const;
```
```
value_iterator begin() const;
```
```
value_iterator end() const;
```
```
const char_type * c_str();
```
```
const value_type * data() const;
```
```
std::size_t size() const;
```

Boost C++ Libraries

Struct value_view

Synopsis

Description

value_view public construct/copy/destruct

value_view public member functions

`value_view` public construct/copy/destruct

`value_view` public member functions