Helper struct to determine whether a Loader has a Collection typedef.
*/
template<typename T>
-struct NeedsCollection
+struct NeedsCollection: public Sfinae
{
- struct Yes { char c[2]; };
- struct No { char c; };
-
template<typename U>
static Yes f(typename U::Collection *);
template<typename U>
static No f(...);
- enum { value = (sizeof(f<T>(0))==sizeof(Yes)) };
+ enum { value = Evaluate<sizeof(f<T>(0))>::value };
};
class CollectionItemTypeBase;
in the order they are added. */
void add_source(CollectionSource &);
+public:
/** Opens a raw resource, without interpreting it as object data. Null is
returned if no such file is found. The caller must dispose of the returned
object when done with it. */
- IO::Seekable *open_from_sources(const std::string &);
+ IO::Seekable *open_raw(const std::string &) const;
+
+protected:
+ IO::Seekable *open_from_sources(const std::string &n) { return open_raw(n); }
private:
void gather_names_from_sources(std::list<std::string> &, const CollectionItemTypeBase &) const;
Creator(FuncPtr f): func(f) { }
virtual T *create(Collection &coll, const std::string &name) const
- { return (static_cast<C &>(coll).*func)(name); }
+ { return (dynamic_cast<C &>(coll).*func)(name); }
};
template<typename B>