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#pragma warning disable 659 // overrides AddToHashCodeCombiner instead
namespace System.Web.Mvc.ExpressionUtil {
using System;
using System.Diagnostics.CodeAnalysis;
using System.Linq.Expressions;
using System.Reflection;
// IndexExpression fingerprint class
// Represents certain forms of array access or indexer property access
[SuppressMessage("Microsoft.Usage", "CA2218:OverrideGetHashCodeOnOverridingEquals", Justification = "Overrides AddToHashCodeCombiner() instead.")]
internal sealed class IndexExpressionFingerprint : ExpressionFingerprint {
public IndexExpressionFingerprint(ExpressionType nodeType, Type type, PropertyInfo indexer)
: base(nodeType, type) {
// Other properties on IndexExpression (like the argument count) are simply derived
// from Type and Indexer, so they're not necessary for inclusion in the fingerprint.
Indexer = indexer;
}
// http://msdn.microsoft.com/en-us/library/system.linq.expressions.indexexpression.indexer.aspx
public PropertyInfo Indexer { get; private set; }
public override bool Equals(object obj) {
IndexExpressionFingerprint other = obj as IndexExpressionFingerprint;
return (other != null)
&& Equals(this.Indexer, other.Indexer)
&& this.Equals(other);
}
internal override void AddToHashCodeCombiner(HashCodeCombiner combiner) {
combiner.AddObject(Indexer);
base.AddToHashCodeCombiner(combiner);
}
}
}
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