cppcheck: explicit

src/pamm/PAMM.cpp

@@ -113,7 +113,7 @@ private:
   PammObject mypamm;
 public:
   static void registerKeywords( Keywords& keys );
-  PAMM(const ActionOptions&);
+  explicit PAMM(const ActionOptions&);
 /// We have to overwrite this here
   unsigned getNumberOfQuantities() const ;
 /// Calculate the weight of this object ( average of input weights )

src/tools/ForwardDecl.h

@@ -36,7 +36,7 @@ class ForwardDecl:
 {
 public:
 // Construction is only possible from a pointer.
-  ForwardDecl(T*);
+  explicit ForwardDecl(T*);
 // Dereference operator is inherited from std::unique_ptr<T>
   using std::unique_ptr<T>::operator *;
 };

src/tools/KernelFunctions.h

@@ -46,9 +46,9 @@ private:
 /// Convert the width into matrix form
   Matrix<double> getMatrix() const;
 public:
-  KernelFunctions( const std::string& input );
+  explicit KernelFunctions( const std::string& input );
   KernelFunctions( const std::vector<double>& at, const std::vector<double>& sig, const std::string& type, const std::string& mtype, const double& w );
-  KernelFunctions( const KernelFunctions* in );
+  explicit KernelFunctions( const KernelFunctions* in );
 /// Normalise the function and scale the height accordingly
   void normalize( const std::vector<Value*>& myvals );
 /// Get the dimensionality of the kernel