std::hash<std::chrono::duration>
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std::chrono::duration 
 
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Defined in header 
 
 
<chrono> 
 template< class Rep, class Period >
struct hash<std::chrono::duration <Rep, Period>>;
 
 (since C++26) 
struct hash<std::chrono::duration <Rep, Period>>;
The template specialization of std::hash for std::chrono::duration allows users to obtain hashes of objects of type std::chrono::duration <Rep, Period>. This specialization is enabled if and only if both std::hash <Rep> and std::hash <Period> are enabled.
[edit] Notes
| Feature-test macro | Value | Std | Feature | 
|---|---|---|---|
| __cpp_lib_chrono | 202306L | (C++26) | Hashing support for std::chronovalue classes |