changed: mark constructors explicit

opm/core/simulator/SimulatorReport.hpp

@@ -45,7 +45,7 @@ namespace Opm
         bool converged;
 
         /// Default constructor initializing all times to 0.0.
-        SimulatorReport(bool verbose=true);
+        explicit SimulatorReport(bool verbose=true);
         /// Copy constructor
         SimulatorReport(const SimulatorReport&) = default;
         /// Increment this report's times by those in sr.

opm/core/transport/reorder/reordersequence.cpp

@@ -18,7 +18,7 @@
 
 struct SortByAbsFlux
 {
-    SortByAbsFlux(const double* flux)
+    explicit SortByAbsFlux(const double* flux)
         : flux_(flux)
     {}
     bool operator() (int f1, int f2)