LocalDefinition.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Linq.Expressions.Interpreter;
 
internal readonly struct LocalDefinition
{
    public int Index { get; }
 
    public ParameterExpression Parameter { get; }
 
    internal LocalDefinition(int localIndex, ParameterExpression parameter)
    {
        Index = localIndex;
        Parameter = parameter;
    }
 
    public override bool Equals([NotNullWhen(true)] object obj)
    {
        if (obj is LocalDefinition localDefinition)
        {
            if (localDefinition.Index == Index)
            {
                return localDefinition.Parameter == Parameter;
            }
            return false;
        }
        return false;
    }
 
    public override int GetHashCode()
    {
        if (Parameter == null)
        {
            return 0;
        }
        return Parameter.GetHashCode() ^ Index.GetHashCode();
    }
}