std::hashnlohmann::basic_json\

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.

Examples

??? 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"
```

Note the output is platform-dependent.

Version history

• Added in version 1.0.0.
• Extended for arbitrary basic_json types in version 3.10.5.