• Jaehunt (10/10) Jul 17 2013 Hi, I tried to compare two sets by opCmp, but I couldn't get
• bearophile (11/12) Jul 17 2013 Unfortunately this is a design limitation of D operator

"Jaehunt" <jaeyoep gmail.com> writes:

Hi, I tried to compare two sets by opCmp, but I couldn't get 
correct outputs.

Does anyone help me?


I have same sets of set S1 = [1,2,3] and S2 = [1,2,3].

Output of S1<S2 should be false because S1 is not a proper subset.

However, S1<=S2 should be true because S1 is a subset of S1.


I can't make a difference between two sets by if statements, so I 
can't make different output.

Does any have a idea for it?

Thank you.

"bearophile" <bearophileHUGS lycos.com> writes:

Jaehunt:

 Does any have a idea for it?

Unfortunately this is a design limitation of D operator 
overloading. I have shown this problem in the main D newsgroup 
lot of time ago. I don't remember the answer, but nothing 
changed. You can bring the problem again in the main D 
newsgroup...

In the meantime you have to define UFCS functions as:

s1.isSubset(s2)
s2.isStrictSubset(s2)

Bye,
bearophile