namespace std { struct hash<nlohmann::basic_json>; }
Return a hash value for a JSON object. The hash function tries to rely on std::hash
where possible. Furthermore, the type of the JSON value is taken into account to have different hash values for #!json null
, #!cpp 0
, #!cpp 0U
, and #!cpp false
, etc.
??? example
The example shows how to calculate hash values for different JSON values. ```cpp --8<-- "examples/std_hash.cpp" ``` Output: ```json --8<-- "examples/std_hash.output" ```