Hello all. It's nice to meet you all here. I Got A Lot of Knowledge from 9cbs. Now, i try to feed back some. The Topic is about generic programming.
I Paste a snippet to show how it it works.
Everyone Who Has Studied The Book Think In C 2nd Edition Knows The Sample, Trash Collection, Which Is At The end of chapter 10, design pattern.
OK, Let's Begin with this.
The Sample Mentioned in Think In C Using Double Dispatch TO IMPLEMENT The Design. And i use generic programming.
Enjoy.
#include
#include
Using namespace std;
Class trash
{
}
Class Paperbin;
Class Glassbin;
Class Paper: Public Trash
{
PUBLIC:
Typedef Paperbin Abin;
}
Class Glass: Public Trash: PUBLIC TRASH
{
PUBLIC:
Typedef glasbin abin;
}
Class Paperbin: Public Vector
{
}
Class Glassbin: Public Vector
{
}
Template
Struct Int2Type
{
Enum {value = v};
}
Template
Class Conversion
{
Typedef char small;
Struct Big {char Dummy [2];
}
Static Small Test (U);
Static Big Test (...);
Static t maket ();
PUBLIC:
ENUM {EXISTS = (SIZEOF (TEST ()) == SIZEOF (SMALL))}
}
Template
Add (Trashs Trash, Bin Bin)
{
Cout << Conversion
_Add (trash, bin, int2type
}
Template
_Add (trash trash, bin bin, int2type
{
bin.push_back (trash);
COUT << "Success Adding" << ENDL;
}
Template
_Add (trash trash, bin bin, int2type
{
Cout << "failed adding" << Endl;};
int main ()
{
Paper apaper;
Glass aglass;
Paperbin apaperbin;
Glassbin Aglassbin;
Add (apaper, apaperbin);
Add (Aglass, Aglassbin);
Add (APAPER, AGLASSBIN);
Add (Aglass, APAPERBIN);
Return 0;
}
You can reach me by send me a email at bu 3bu4@263.net.
