use always_false to fail static assertions in constexpr if (#737)

AIDASoft · Feb 18, 2025 · ad6f414 · ad6f414
1 parent 21d3e4b
commit ad6f414
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/src/rootUtils.h b/src/rootUtils.h
@@ -3,6 +3,7 @@
 
 #include "podio/CollectionIDTable.h"
 #include "podio/utilities/RootHelpers.h"
+#include "podio/utilities/TypeHelpers.h"
 
 #include "TBranch.h"
 #include "TTree.h"
@@ -58,7 +59,7 @@ consteval auto getGPKeyName() {
   } else if constexpr (std::is_same<T, std::string>::value) {
     return stringKeyName;
   } else {
-    static_assert(sizeof(T) == 0, "Unsupported type for generic parameters");
+    static_assert(podio::detail::always_false<T>, "Unsupported type for generic parameters");
   }
 }
 
@@ -76,7 +77,7 @@ consteval auto getGPValueName() {
   } else if constexpr (std::is_same<T, std::string>::value) {
     return stringValueName;
   } else {
-    static_assert(sizeof(T) == 0, "Unsupported type for generic parameters");
+    static_assert(podio::detail::always_false<T>, "Unsupported type for generic parameters");
   }
 }
 
@@ -105,7 +106,7 @@ consteval auto getGPBranchOffsets() {
   } else if constexpr (std::is_same_v<T, std::string>) {
     return GPBranchOffsets{7, 8};
   } else {
-    static_assert(sizeof(T) == 0, "Unsupported type for generic parameters");
+    static_assert(podio::detail::always_false<T>, "Unsupported type for generic parameters");
   }
 }