std::hash<std::error_code> - cppreference.com

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# std::hash<std::error_code>

From cppreference.com
< cpp‎ | error‎ | error code

Defined in header `<system_error>` |  |
template<> struct hash<error_code>; |  | (since C++11)

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

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