## basic_error_output

### Synopsis

Defined in <boost/openmethod/policies/basic_error_output.hpp>.

```c++
namespace boost::openmethod::policies {

template<class Policy, typename Stream = /*unspecified*/>
struct basic_error_output : output {
    static Stream error_stream;
};

}
```

### Description

`basic_error_output` is an implementation of `output` that writes error
messages to a `LightweightOutputStream`.

### Members

#### error_stream

```c++
Stream  error_stream;
```

Initialized by the default constructor of `Stream`. It is the responsibility of
the program to initializate it if needed, e.g., for a `std::ofstream`, to open
it.