37 lines
1.4 KiB
C#
37 lines
1.4 KiB
C#
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#pragma warning disable 659 // overrides AddToHashCodeCombiner instead
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namespace System.Web.Mvc.ExpressionUtil {
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq.Expressions;
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// ParameterExpression fingerprint class
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// Can represent the model parameter or an inner parameter in an open lambda expression
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[SuppressMessage("Microsoft.Usage", "CA2218:OverrideGetHashCodeOnOverridingEquals", Justification = "Overrides AddToHashCodeCombiner() instead.")]
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internal sealed class ParameterExpressionFingerprint : ExpressionFingerprint {
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public ParameterExpressionFingerprint(ExpressionType nodeType, Type type, int parameterIndex)
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: base(nodeType, type) {
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ParameterIndex = parameterIndex;
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}
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// Parameter position within the overall expression, used to maintain alpha equivalence.
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public int ParameterIndex { get; private set; }
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public override bool Equals(object obj) {
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ParameterExpressionFingerprint other = obj as ParameterExpressionFingerprint;
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return (other != null)
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&& (this.ParameterIndex == other.ParameterIndex)
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&& this.Equals(other);
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}
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internal override void AddToHashCodeCombiner(HashCodeCombiner combiner) {
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combiner.AddInt32(ParameterIndex);
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base.AddToHashCodeCombiner(combiner);
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}
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}
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}
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