49 lines
1.1 KiB
C#
49 lines
1.1 KiB
C#
namespace Common;
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public readonly struct Variant<T1, T2> where T1 : notnull where T2 : notnull
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{
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public Variant()
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{
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throw new InvalidOperationException("Variant must be initialized with a value");
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}
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public Variant(T1 value)
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{
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_value = value;
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}
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public Variant(T2 value)
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{
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_value = value;
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}
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private readonly object _value;
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public void Match(Action<T1> on1, Action<T2> on2)
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{
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switch (_value)
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{
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case T1 v1:
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on1(v1);
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break;
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case T2 v2:
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on2(v2);
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break;
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default:
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throw new InvalidCastException();
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}
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}
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public T Match<T>(Func<T1, T> on1, Func<T2, T> on2)
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{
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return _value switch
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{
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T1 v1 => on1(v1),
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T2 v2 => on2(v2),
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_ => throw new InvalidCastException()
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};
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}
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public static implicit operator Variant<T1, T2>(T1 value) => new(value);
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public static implicit operator Variant<T1, T2>(T2 value) => new(value);
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} |