Struct key_value_pair_view

boost::process::v2::environment::key_value_pair_view — A view for a key value pair in an environment.

Synopsis

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


struct key_value_pair_view {
  // types
  typedef char_type                      value_type;      
  typedef std::basic_string< char_type > string_type;     
  typedef basic_cstring_ref< char_type > string_view_type;
  typedef std::char_traits< char_type >  traits_type;     

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

  // public member functions
  void swap(key_value_pair_view &) noexcept;
  string_view_type native() const noexcept;
  operator string_view_type() const;
  operator typename string_view_type::string_view_type() const;
  int compare(key_value_pair_view) const noexcept;
  int compare(const string_type &) const;
  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;
  key_view key() const;
  value_view value() const;
  template<std::size_t Idx> virtual auto get() const = 0;
  const value_type * c_str() const noexcept;
  const value_type * data() const;
  std::size_t size() const;
  template<> key_view get() const;
  template<> value_view get() const;
};

Description

`key_value_pair_view` public construct/copy/destruct

```
key_value_pair_view();
```

key_value_pair_view(const key_value_pair_view & p) = default;

key_value_pair_view(key_value_pair_view && p);

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

key_value_pair_view(const char_type * p);

```
key_value_pair_view(char_type * p);
```

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

key_value_pair_view & operator=(key_value_pair_view && p);

```
~key_value_pair_view();
```

`key_value_pair_view` public member functions

void swap(key_value_pair_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(key_value_pair_view p) const noexcept;

int compare(const string_type & str) const;

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;
```
```
key_view key() const;
```
```
value_view value() const;
```

template<std::size_t Idx> virtual auto get() const = 0;

const value_type * c_str() const noexcept;

```
const value_type * data() const;
```
```
std::size_t size() const;
```
```
template<> key_view get() const;
```
```
template<> value_view get() const;
```

Boost C++ Libraries

Struct key_value_pair_view

Synopsis

Description

key_value_pair_view public construct/copy/destruct

key_value_pair_view public member functions

`key_value_pair_view` public construct/copy/destruct

`key_value_pair_view` public member functions