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## std_rtti
### Synopsis
Defined in <boost/openmethod/policies/std_rtti.hpp>.
```c++
namespace boost::openmethod::policies {
struct std_rtti : rtti {
template<class Class>
static auto static_type() -> type_id;
template<class Class>
static auto dynamic_type(const Class& obj) -> type_id;
template<typename Stream>
static auto type_name(type_id type, Stream& stream) -> void;
static auto type_index(type_id type) -> std::type_index;
template<typename D, typename B>
static auto dynamic_cast_ref(B&& obj) -> D;
};
} // boost::openmethod::policies
```
### Description
`std_rtti` is an implementation of the `rtti` policy that uses standard RTTI.
### Members
#### static_type
```c++
template<class Class>
static auto static_type() -> type_id;
```
Return the address of `Class`'s `type_info`, cast to a `type_id`.
#### dynamic_type
```c++
template<class Class>
static auto dynamic_type(const Class& obj) -> type_id;
```
Return the address of `obj`{empty}'s `type_info`, cast to a `type_id`.
#### type_name
```c++
template<typename Stream>
static auto type_name(type_id type, Stream& stream) -> void;
```
Write the demangled name of the class identified by `type` to `stream`.
Execute `stream << reinterpret_cast<const std::type_info*>(type)->name()`.
#### type_index
```c++
static auto type_index(type_id type) -> /*unspecified*/;
```
Return `std::type_index(*reinterpret_cast<const std::type_info*>(type))`.
The function is required because C++ does *not* guarantee that there is a single
instance of `std::type_info` for each specific type.
#### dynamic_cast_ref
```c++
template<typename Derived, typename Base>
static auto dynamic_cast_ref(Base&& obj) -> Derived;
```
Cast `obj` using the `dynamic_cast` operator.
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