small sonar fixes

[simgrid.git] / src / kernel / activity / BarrierImpl.hpp

diff --git a/src/kernel/activity/BarrierImpl.hpp b/src/kernel/activity/BarrierImpl.hpp
index b214e5f..083b874 100644 (file)
--- a/src/kernel/activity/BarrierImpl.hpp
+++ b/src/kernel/activity/BarrierImpl.hpp
@@ -75,9 +75,9 @@ public:
 
   s4u::Barrier& get_iface() { return piface_; }
 
-  std::string to_string()
+  std::string to_string() const
   {
-    return xbt::string_printf("Barrier %d: %zu of %u", id_, ongoing_acquisitions_.size(), expected_actors_);
+    return xbt::string_printf("Barrier %u: %zu of %u", id_, ongoing_acquisitions_.size(), expected_actors_);
   }
 };
 } // namespace activity