From f8c5f8dbade27b680754dc3524dd6cf126a8cf49 Mon Sep 17 00:00:00 2001
From: "Timur A. Fatkhullin" <timur@sao.ru>
Date: Tue, 8 Sep 2026 09:15:43 +0300
Subject: [PATCH] ...

---
 include/snipplib/containers/snplib_hmap.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/snipplib/containers/snplib_hmap.h b/include/snipplib/containers/snplib_hmap.h
index e4d0097..de6ad55 100644
--- a/include/snipplib/containers/snplib_hmap.h
+++ b/include/snipplib/containers/snplib_hmap.h
@@ -663,7 +663,9 @@ public:
             using u_t = std::invoke_result_t<decltype(from_cnv_func), v_t>::value_type;
 
             // user type must differ from inserted one
-            static_assert(!std::same_as<v_t, u_t>, "INVALID CONVERSIONAL 'FROM-FUNCTION' SIGNATURE!");
+            if constexpr (std::same_as<v_t, u_t>) {  // just ignore the such type
+                return;
+            }
 
             _getter<u_t>[this].emplace(
                 kk,