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Re: operator< for container sorting (small confusion) [message #13073 is a reply to message #13071]

Sun, 09 December 2007 07:54

mirek
Messages: 14257
Registered: November 2005

Ultimate Member

Andy2222 wrote on Sat, 08 December 2007 14:10

I'm trying to store my own data type inside a Index<> so far i made it "movable" and it has the needed hashing call and a == operator.

Im just not sure how can i sort the Index using the Sort() function?

I saw some examples where the global operator< is overloaded by like this.

bool operator<(const XDCCPackage& a, const XDCCPackage& b)
{
return a.Filename < b.Filename;
}

So i don't define one inside the class and overload the global operator<?

I tryed doing this but it seem also need to define the operator= or a swap call?
Little confused right now small hints pls?

PS: is there a U++ nooby section? Smile

Well, it can be global, but IMO the main problem is that you cannot Sort Index (that is that missing Swap).

If you really need to sort Index, convert it to Vector, sort and convert back.

(Use PickKeys to convert to Vector and constructor variant for conversion back).

Mirek

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