## type_id

### Synopsis

Defined in `<boost/openmethod/policies/basic_policy.hpp>`.

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

using type_id = std::uintptr_t;

}
```

### Description

`type_id` is an unsigned integer type used to identify types. It is wide enough
to contain a pointer.

## vptr_type

### Synopsis

Defined in `<boost/openmethod/policies/basic_policy.hpp>`.

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

using vptr_type = const /*unspecified*/ *;

}
```

### Description

`vptr_type` is the type of a pointer to a v-table.