From 74608147c042d88a11e54b135c86c993b3ce95c0 Mon Sep 17 00:00:00 2001
From: Lisa Julia Nebel <lisa.nebel@dr-blatt.de>
Date: Fri, 26 Jan 2024 14:27:12 +0100
Subject: [PATCH] Add comment on trailing return type with decltype that is
 used for detecting the existence of setUseFixedOrder member function

---
 opm/simulators/linalg/PreconditionerFactory_impl.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/opm/simulators/linalg/PreconditionerFactory_impl.hpp b/opm/simulators/linalg/PreconditionerFactory_impl.hpp
index 81b9e64ba..7ec0b5467 100644
--- a/opm/simulators/linalg/PreconditionerFactory_impl.hpp
+++ b/opm/simulators/linalg/PreconditionerFactory_impl.hpp
@@ -95,6 +95,7 @@ struct AMGSmootherArgsHelper<Opm::ParallelOverlappingILU0<M,V,V,C>>
 };
 
 
+// trailing return type with decltype used for detecting existence of setUseFixedOrder member function by overloading the setUseFixedOrder function
 template <typename C>
 auto setUseFixedOrder(C criterion, bool booleanValue) -> decltype(criterion.setUseFixedOrder(booleanValue))
 {