Turn internal type helpers into structs

Eliminating access specifiers and dummy constructors reduces clutter, and
in most cases pure virtual functions prevent instantiation anyway.  Since
these reside in private or protected sections of other classes, risk of
misuse is negligible.

diff --git a/source/collection.h b/source/collection.h
index be9ae88c491595f925db46e30aeff2daa67deb5f..1f4b5562107a338190cf221355692aaa4c64d04f 100644 (file)
--- a/source/collection.h
+++ b/source/collection.h
@@ -284,16 +284,13 @@ public:
 class CollectionItemTypeBase
 {
 protected:
-       class TagBase
+       struct TagBase
        {
-       protected:
-               TagBase() { }
-       public:
                virtual ~TagBase() { }
        };
 
        template<typename T>
-       class Tag: public TagBase
+       struct Tag: TagBase
        { };
 
        std::string kwd;
@@ -327,37 +324,28 @@ template<typename T>
 class CollectionItemType: public CollectionItemTypeBase
 {
 private:
-       class CreatorBase
+       struct CreatorBase
        {
-       protected:
-               CreatorBase() { }
-       public:
                virtual ~CreatorBase() { }
 
                virtual T *create(Collection &, const std::string &) const = 0;
        };
 
        template<typename C>
-       class Creator: public CreatorBase
+       struct Creator: CreatorBase
        {
-       public:
                typedef T *(C::*FuncPtr)(const std::string &);
 
-       private:
                FuncPtr func;
 
-       public:
                Creator(FuncPtr f): func(f) { }
 
                virtual T *create(Collection &coll, const std::string &name) const
                { return (static_cast<C &>(coll).*func)(name); }
        };
 
-       class StoreBase
+       struct StoreBase
        {
-       protected:
-               StoreBase() { }
-       public:
                virtual ~StoreBase() { }
 
                virtual void store(Collection &, const std::string &, T *) = 0;
@@ -366,9 +354,8 @@ private:
        };
 
        template<typename S>
-       class Store: public StoreBase
+       struct Store: StoreBase
        {
-       public:
                virtual void store(Collection &coll, const std::string &name, T *obj)
                { coll.add(name, static_cast<S *>(obj)); }