Fix ttg::persistent

We should consider this a hint and fall back to non-persistent values if the type is not derived from TTValue or we are running with madness. Signed-off-by: Joseph Schuchart <[email protected]>
devreal · Oct 28, 2024 · 319cd6b · 319cd6b
1 parent 8f94781
commit 319cd6b
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/ttg/ttg/madness/ttvalue.h b/ttg/ttg/madness/ttvalue.h
@@ -9,6 +9,11 @@ namespace ttg_madness {
     /* empty */
   };
 
+  template<typename ValueT>
+  inline auto persistent(ValueT&& value) {
+    return std::forward<ValueT>(value);
+  }
+
 } // namespace ttg_madness
 
   #endif // TTG_MADNESS_TTVALUE_H
diff --git a/ttg/ttg/parsec/ttvalue.h b/ttg/ttg/parsec/ttvalue.h
@@ -91,9 +91,11 @@ namespace ttg_parsec {
 
   template<typename ValueT>
   inline auto persistent(ValueT&& value) {
-    static_assert(std::is_base_of_v<TTValue<std::decay_t<ValueT>>, std::decay_t<ValueT>>,
-                  "ttg::persistent can only be used on types derived from ttg::TTValue");
-    return detail::persistent_value_ref<ValueT>{value};
+    if constexpr (std::is_base_of_v<TTValue<std::decay_t<ValueT>>, std::decay_t<ValueT>>) {
+      return detail::persistent_value_ref<ValueT>{value};
+    } else {
+      return std::forward<ValueT>(value);
+    }
   }
 
 } // namespace ttg_parsec