Add 'json4cpp/' from commit '9a737481aed085fd289f82dff1fa8c3c66627a7e'

git-subtree-dir: json4cpp
git-subtree-mainline: 292baed7ac0cf84263263966ed32ed113cae857f
git-subtree-split: 9a737481aed085fd289f82dff1fa8c3c66627a7e

1 files changed, 86 insertions, 0 deletions

diff --git a/json4cpp/tests/src/unit-no-mem-leak-on-adl-serialize.cpp b/json4cpp/tests/src/unit-no-mem-leak-on-adl-serialize.cpp
new file mode 100644
index 0000000000..469fc2c75f
--- /dev/null
+++ b/json4cpp/tests/src/unit-no-mem-leak-on-adl-serialize.cpp
@@ -0,0 +1,86 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++ (supporting code)
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#include "doctest_compatibility.h"
+
+#include <nlohmann/json.hpp>
+#include <exception>
+#include <iostream>
+
+struct Foo
+{
+    int a;
+    int b;
+};
+
+namespace nlohmann
+{
+template <>
+struct adl_serializer<Foo>
+{
+    static void to_json(json& j, Foo const& f)
+    {
+        switch (f.b)
+        {
+            case 0:
+                j["a"] = f.a;
+                break;
+            case 1:
+                j[0] = f.a;
+                break;
+            default:
+                j = "test";
+        }
+        if (f.a == 1)
+        {
+            throw std::runtime_error("b is invalid");
+        }
+    }
+};
+} // namespace nlohmann
+
+TEST_CASE("check_for_mem_leak_on_adl_to_json-1")
+{
+    try
+    {
+        const nlohmann::json j = Foo {1, 0};
+        std::cout << j.dump() << "\n";
+    }
+    catch (...) // NOLINT(bugprone-empty-catch)
+    {
+        // just ignore the exception in this POC
+    }
+}
+
+TEST_CASE("check_for_mem_leak_on_adl_to_json-2")
+{
+    try
+    {
+        const nlohmann::json j = Foo {1, 1};
+        std::cout << j.dump() << "\n";
+    }
+    catch (...) // NOLINT(bugprone-empty-catch)
+    {
+        // just ignore the exception in this POC
+    }
+}
+
+TEST_CASE("check_for_mem_leak_on_adl_to_json-2")
+{
+    try
+    {
+        const nlohmann::json j = Foo {1, 2};
+        std::cout << j.dump() << "\n";
+    }
+    catch (...) // NOLINT(bugprone-empty-catch)
+    {
+        // just ignore the exception in this POC
+    }
+}
+
+