28 lines
408 B
C#
28 lines
408 B
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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class C<T>
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{
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public IEnumerator GetEnumerator ()
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{
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return new T[0].GetEnumerator ();
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}
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public IEnumerable<T> Filter (Func<T, bool> predicate)
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{
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foreach (T item in this)
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if (predicate (item))
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yield return item;
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}
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}
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class M
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{
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public static void Main ()
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{
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foreach (var v in new C<long>().Filter(null)) {
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}
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}
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}
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