Struct template env

Boost C++ Libraries

Struct template env

boost::proto::env

Synopsis

// In header: <boost/proto/transform/env.hpp>

template<typename Key, typename Value, typename Env = proto::empty_env> 
struct env {
  // construct/copy/destruct
  (,  = );

  // public member functions
   () ;
};

Description

`env` public construct/copy/destruct

```
( value,  other = );
```
Parameters:

other

Another key/value store.

value

The value to be associated with the Key.

`env` public member functions

```
 () ;
```
If called with an object that is implicitly convertible to type Key, this function returns the Value passed to the constructor. Otherwise, it returns the result of calling operator[] on the Env passed to the constructor.