deploy: 63c10a51fc

examples/json_pointer__operator_spaceship.c++20.cpp

@@ -0,0 +1,32 @@
+#include <compare>
+#include <iostream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+const char* to_string(const std::strong_ordering& so)
+{
+    if (std::is_lt(so))
+    {
+        return "less";
+    }
+    else if (std::is_gt(so))
+    {
+        return "greater";
+    }
+    return "equal";
+}
+
+int main()
+{
+    // different JSON pointers
+    json::json_pointer ptr1("/a/b");
+    json::json_pointer ptr2("/a/c");
+    json::json_pointer ptr3("/a/b/c");
+    json::json_pointer ptr4("/a/b");
+
+    // 3-way compare JSON pointers
+    std::cout << "\"" << ptr1 << "\" <=> \"" << ptr2 << "\": " << to_string(ptr1 <=> ptr2) << '\n' // *NOPAD*
+              << "\"" << ptr1 << "\" <=> \"" << ptr3 << "\": " << to_string(ptr1 <=> ptr3) << '\n' // *NOPAD*
+              << "\"" << ptr1 << "\" <=> \"" << ptr4 << "\": " << to_string(ptr1 <=> ptr4) << std::endl; // *NOPAD*
+}