Re: Useless use of smart pointers
From what you describe, it's simple enough that there's no need for
smart pointers. I see no purpose for weak pointers at all, either.
Also (again, from what you describe), your store is better written
using references (that breaks existing code that uses pointers, but a
simple facade can alleviate that):
class ObjStore1 {
public:
const Obj& get( const std::string& filename );
~ObjStore1();
private:
typedef std::map< std::string, const Obj* > store_type;
store_type store;
};
const Obj& ObjStore1::get( const std::string& filename )
{
store_type::const_iterator it = store.find( filename );
if ( it != store.end() ) {
return *it->second;
} else {
std::auto_ptr< Obj > pObj( new Obj( filename ) );
store[ filename ] = pObj.get();
return *pObj.release();
}
}
Note also that you take unneeded performance hit in get(): you use
find and op[]. That's two searches. You should use lower_bound and
insert to eliminate one.
Goran.
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