--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/cpptest.cpp Wed Jan 21 22:03:49 2026 +0100
@@ -0,0 +1,55 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2026 Mike Becker, Olaf Wintermann All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Test that all headers compile with a C++ compiler.
+
+#include "cx/allocator.h"
+#include "cx/array_list.h"
+#include "cx/buffer.h"
+#include "cx/collection.h"
+#include "cx/common.h"
+#include "cx/compare.h"
+#include "cx/hash_key.h"
+#include "cx/hash_map.h"
+#include "cx/iterator.h"
+#include "cx/json.h"
+#include "cx/kv_list.h"
+#include "cx/linked_list.h"
+#include "cx/list.h"
+#include "cx/map.h"
+#include "cx/mempool.h"
+#include "cx/printf.h"
+#include "cx/properties.h"
+#include "cx/streams.h"
+#include "cx/string.h"
+#include "cx/test.h"
+#include "cx/tree.h"
+
+int main() {
+ return 0;
+}