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std::hash<std::error_condition>

From cppreference.com
 
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
 
 
 
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.