From 17364e148bc230d8eec989c1e5990ae99a01e803 Mon Sep 17 00:00:00 2001
From: Matti Kortelainen <matti.kortelainen@cern.ch>
Date: Fri, 9 Jun 2023 10:37:09 +0200
Subject: [PATCH] No need to check into base classes of std classes

From Philippe Canal. Checking existence of dictionaries for base
classes of std classes caused missing dictionary errors for
__pair_base with GCC 12.
---
 FWCore/Reflection/src/DictionaryTools.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/FWCore/Reflection/src/DictionaryTools.cc b/FWCore/Reflection/src/DictionaryTools.cc
index a80fe43c32f81..ba1fd81a3abf3 100644
--- a/FWCore/Reflection/src/DictionaryTools.cc
+++ b/FWCore/Reflection/src/DictionaryTools.cc
@@ -57,6 +57,7 @@ to have dictionaries.
 #include "FWCore/Utilities/interface/WrappedClassName.h"
 
 #include "TClass.h"
+#include "TClassEdit.h"
 #include "THashTable.h"
 
 #include <algorithm>
@@ -328,6 +329,12 @@ namespace edm {
       return true;
     }
 
+    // No need to check into base classes of standard library
+    // classes.
+    if (TClassEdit::IsStdClass(typeWithDict.name().c_str())) {
+      return true;
+    }
+
     TypeBases bases(typeWithDict);
     bool returnValue = true;
     for (auto const& basex : bases) {