std:: hash <std::error_condition>

From cppreference.net

Defined in header `<system_error>`
template <> struct hash < std:: error_condition > ;		(since C++17)

The template specialization of std::hash for std::error_condition allows users to obtain hashes of objects of type std::error_condition .

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Member functions
error_condition::error_condition
error_condition::operator=
error_condition::assign
error_condition::clear
error_condition::value
error_condition::category
error_condition::message
error_condition::operator bool
Non-member functions
operator== operator!= operator< operator<=> (until C++20) (until C++20) (C++20)
Helper classes
is_error_condition_enum
hash <std::error_condition>