47 lines
1.2 KiB
C#
47 lines
1.2 KiB
C#
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namespace Util {
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public class Optional<T> {
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private T _Value;
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public T Value {
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get {
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if (HasValue) {
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return _Value;
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} else {
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throw new System.InvalidOperationException("Value of the Optional is null.");
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}
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}
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set {
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_Value = value;
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}
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}
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public Optional(T val) {
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Value = val;
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}
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public static explicit operator T(Optional<T> opt) {
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return opt.Value;
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}
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public static implicit operator Optional<T>(T val) {
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return new Optional<T>(val);
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}
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public static implicit operator T(Optional<T> opt) {
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return opt.Value;
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}
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public void Clear() {
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_Value = default(T);
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}
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public bool HasValue { get { return _Value != null; } }
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public bool isEmpty { get { return !HasValue; } }
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public bool Equals(Optional<T> opt) {
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if (opt.HasValue == HasValue) { return Equals(opt.Value, Value); }
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else { return opt.HasValue == HasValue; }
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}
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}
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}
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