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c#variablescompare
Patrick vD
Patrick vD

Reputation: 789

Is there a variable type for comparators?

Is there a variable type (something like string, int, or bool) for comparators? (==, !=, <=, >=, >, <) And if not, how does C# use them?

I can use

int integerVariable = 0;

but is there something I can use to do

comp comparatorVariable = ==;

?

Upvotes: 2

Views: 376

Answers (2)

Steve
Steve

Reputation: 633

C# provides a generic interface called IComparable<T>.

This interface has a single method: int CompareTo<T>

public interface IComparable<in T>
    {
        int CompareTo(T other);
    }

To implement the comparative operators (==, !=, <=, >=, >, <), you need to implement these operators on the class that inherits IComparable .

The date time "==" operator probably looks something like the following.

public static bool operator ==(DateTime d1, DateTime d2)
{
    return d1.CompareTo(d2) == 0;
}

Upvotes: -1

Servy
Servy

Reputation: 203840

The various operators you've listed do not have a type no. Objects have types. You've listed operators, which are themselves not objects, and so have no type. If you're interested in how the C# language uses operators, you can look at the language spec; section 7.3 of the C# 5.0 specs is titled "Operators" and is filled with information on how C# handles operators.

Upvotes: 5

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