From 1377ed8d275bdf54b0858889b88422a5d3fafd8f Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian@gmail.com>
Date: Wed, 10 Jan 2024 10:40:57 -0500
Subject: [PATCH] [FOLD] test static_string as NTTP

---
 test/constexpr_tests.hpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/test/constexpr_tests.hpp b/test/constexpr_tests.hpp
index 9b2e83c..392eb3a 100644
--- a/test/constexpr_tests.hpp
+++ b/test/constexpr_tests.hpp
@@ -605,5 +605,28 @@ testConstantEvaluation()
     cstatic_string().empty();
 #endif
 }
+
+#ifdef BOOST_STATIC_STRING_CPP20
+
+template<static_string<32> X>
+struct nttp_primary
+{
+  static constexpr bool value = false;
+};
+
+template<>
+struct nttp_primary<"test string">
+{
+  static constexpr bool value = true;
+};
+
+static_assert(!nttp_primary<"random string">::value,
+  "structural equality broken");
+
+static_assert(nttp_primary<"test string">::value,
+  "structural equality broken");
+
+#endif
+
 } // static_strings
 } // boost
\ No newline at end of file