mark constructors explicit

external/resinsight/LibCore/cvfColor3.h

@@ -112,7 +112,7 @@ public:
     Color3f();
     Color3f(float r, float g, float b);
     Color3f(const Color3f& other);
-    Color3f(ColorIdent colorIdent);
+    explicit Color3f(ColorIdent colorIdent);
     explicit Color3f(const Color3ub& other);
 
     Color3f&        operator=(const Color3f& rhs);
@@ -158,7 +158,7 @@ public:
     Color3ub();
     Color3ub(ubyte r, ubyte g, ubyte b);
     Color3ub(const Color3ub& other);
-    Color3ub(ColorIdent colorIdent);
+    explicit Color3ub(ColorIdent colorIdent);
     explicit Color3ub(const Color3f& other);
 
     Color3ub&       operator=(const Color3ub& rhs);

external/resinsight/LibCore/cvfDebugTimer.h

@@ -60,7 +60,7 @@ public:
     };
 
 public:
-    DebugTimer(const char* prefix, OperationMode operationMode = NORMAL);
+    explicit DebugTimer(const char* prefix, OperationMode operationMode = NORMAL);
     ~DebugTimer();
 
     void    restart(const char* msg = NULL);

external/resinsight/LibCore/cvfFlags.h

@@ -52,7 +52,7 @@ class Flags
 public:
     inline Flags(); 
     inline Flags(const Flags& other);
-    inline Flags(FlagEnum flag);
+    explicit inline Flags(FlagEnum flag);
 
     inline Flags&  operator=(const Flags& rhs);
     inline Flags&  operator=(FlagEnum flag);

external/resinsight/LibCore/cvfObject.h

@@ -99,7 +99,7 @@ class ref
 public:
     ref(T* object = NULL);
     ref(const ref& other);
-    template<typename T2> ref(const ref<T2>& other);
+    template<typename T2> explicit ref(const ref<T2>& other);
     ~ref();
 
     ref&                        operator=(T* rhs);
@@ -150,7 +150,7 @@ class cref
 public:
     cref(const T* object = NULL);
     cref(const cref& other);
-    template<typename T2> cref(const cref<T2>& other);
+    template<typename T2> explicit cref(const cref<T2>& other);
     ~cref();
 
     cref&                       operator=(const T* rhs);

external/resinsight/cafPdmCore/cafSignal.h

@@ -108,7 +108,7 @@ public:
     using MemberCallbackAndActiveFlag = std::pair<MemberCallback, bool>;
 
 public:
-    Signal( const SignalEmitter* emitter )
+    explicit Signal( const SignalEmitter* emitter )
         : m_emitter( emitter )
     {
         m_emitter->addEmittedSignal( this );