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## default_error_handler
### Synopsis
Defined in <boost/openmethod/policies/default_error_handler.hpp>.
```c++
namespace boost::openmethod::policies {
template<class Policy>
class default_error_handler : public error_handler {
public:
using error_variant = std::variant<
openmethod_error, not_implemented_error, unknown_class_error,
hash_search_error, type_mismatch_error, static_slot_error,
static_stride_error>;
using function_type = std::function<void(const error_variant& error)>;
template<class Error>
static auto error(const Error& error) -> void;
static auto set_error_handler(error_handler_type handler) -> function_type;
};
}
```
### Description
`default_error_handler` is an implementation of `error_handler` that calls a
`std::function` to handle the error.
### Members
#### error
```c++
template<class Error>
static auto error(const Error& error) -> void;
```
Calls the function last set via `set_error_handler` or, if it was never called,
and if _Policy_ contains an `output` policy, use it to print a description
of `error`.
#### error
```c++
static auto set_error_handler(function_type handler) -> function_type;
```
Sets `handler` as the function to call in case of error.
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