42 lines
1.6 KiB
C#
42 lines
1.6 KiB
C#
using System;
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namespace Umbraco.Core.Collections
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{
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/// <summary>
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/// Represents a composite key of (string, string) for fast dictionaries.
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/// </summary>
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/// <remarks>
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/// <para>The string parts of the key are case-insensitive.</para>
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/// <para>Null is NOT a valid value for neither parts.</para>
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/// </remarks>
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public struct CompositeStringStringKey : IEquatable<CompositeStringStringKey>
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{
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private readonly string _key1;
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private readonly string _key2;
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/// <summary>
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/// Initializes a new instance of the <see cref="CompositeStringStringKey"/> struct.
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/// </summary>
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public CompositeStringStringKey(string key1, string key2)
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{
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_key1 = key1?.ToLowerInvariant() ?? throw new ArgumentNullException(nameof(key1));
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_key2 = key2?.ToLowerInvariant() ?? throw new ArgumentNullException(nameof(key2));
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}
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public bool Equals(CompositeStringStringKey other)
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=> _key2 == other._key2 && _key1 == other._key1;
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public override bool Equals(object obj)
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=> obj is CompositeStringStringKey other && _key2 == other._key2 && _key1 == other._key1;
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public override int GetHashCode()
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=> _key2.GetHashCode() * 31 + _key1.GetHashCode();
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public static bool operator ==(CompositeStringStringKey key1, CompositeStringStringKey key2)
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=> key1._key2 == key2._key2 && key1._key1 == key2._key1;
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public static bool operator !=(CompositeStringStringKey key1, CompositeStringStringKey key2)
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=> key1._key2 != key2._key2 || key1._key1 != key2._key1;
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}
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}
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