Add test with types that return void* from begin/end. Refs #36.

test/is_range_test4.cpp

@@ -0,0 +1,28 @@
+// Copyright 2024 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/is_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+
+struct X1
+{
+    void* begin() const;
+    void* end() const;
+};
+
+struct X2
+{
+    void const* begin() const;
+    void const* end() const;
+};
+
+int main()
+{
+    using boost::container_hash::is_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_range<X1>));
+    BOOST_TEST_TRAIT_FALSE((is_range<X2>));
+
+    return boost::report_errors();
+}