Add 'json4cpp/' from commit '9a737481aed085fd289f82dff1fa8c3c66627a7e'

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

2 files changed, 33 insertions, 0 deletions

diff --git a/json4cpp/tests/module_cpp20/CMakeLists.txt b/json4cpp/tests/module_cpp20/CMakeLists.txt
new file mode 100644
index 0000000000..b6d395aaad
--- /dev/null
+++ b/json4cpp/tests/module_cpp20/CMakeLists.txt
@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.28)
+
+project(json_test CXX)
+
+set(NLOHMANN_JSON_BUILD_MODULES ON CACHE BOOL "Enable nlohmann.json module support")
+
+add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../.. ${CMAKE_CURRENT_BINARY_DIR}/tests)
+
+add_executable(json_test main.cpp)
+target_link_libraries(json_test 
+    PRIVATE 
+        nlohmann_json_modules
+)
+
+target_compile_definitions(json_test 
+    PRIVATE NLOHMANN_JSON_BUILD_MODULES
+)
+
+target_compile_features(json_test PUBLIC cxx_std_20)
diff --git a/json4cpp/tests/module_cpp20/main.cpp b/json4cpp/tests/module_cpp20/main.cpp
new file mode 100644
index 0000000000..9a2f3d360f
--- /dev/null
+++ b/json4cpp/tests/module_cpp20/main.cpp
@@ -0,0 +1,14 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  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
+
+import nlohmann.json;
+
+int main()
+{
+    nlohmann::json j;
+}