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# nlohmann::basic_json::object_comparator_t

    using object_comparator_t = typename object_t::key_compare;
    // or
    using object_comparator_t = default_object_comparator_t;

The comparator used by `object_t`. Defined as `typename object_t::key_compare` if available, and `default_object_comparator_t` otherwise.

## Examples

Example

The example below demonstrates the used object comparator.

    #include <iostream>
    #include <nlohmann/json.hpp>

    using json = nlohmann::json;

    int main()
    {
        std::cout << std::boolalpha
                  << "json::object_comparator_t(\"one\", \"two\") = " << json::object_comparator_t{}("one", "two") << "\n"
                  << "json::object_comparator_t(\"three\", \"four\") = " << json::object_comparator_t{}("three", "four") << std::endl;
    }

Output:

    json::object_comparator_t("one", "two") = true
    json::object_comparator_t("three", "four") = false

## Version history

- Added in version 3.0.0.
- Changed to be conditionally defined as `typename object_t::key_compare` or `default_object_comparator_t` in version 3.11.0.

Last update: May 17, 2022
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