SetIndexBinder.cs

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using System.Dynamic.Utils;
 
namespace System.Dynamic;
 
public abstract class SetIndexBinder : DynamicMetaObjectBinder
{
    public sealed override Type ReturnType => typeof(object);
 
    public CallInfo CallInfo { get; }
 
    internal sealed override bool IsStandardBinder => true;
 
    protected SetIndexBinder(CallInfo callInfo)
    {
        ContractUtils.RequiresNotNull(callInfo, "callInfo");
        CallInfo = callInfo;
    }
 
    public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
    {
        ContractUtils.RequiresNotNull(target, "target");
        ContractUtils.RequiresNotNull(args, "args");
        ContractUtils.Requires(args.Length >= 2, "args");
        DynamicMetaObject value = args[^1];
        DynamicMetaObject[] array = args.RemoveLast();
        ContractUtils.RequiresNotNull(value, "args");
        ContractUtils.RequiresNotNullItems(array, "args");
        return target.BindSetIndex(this, array, value);
    }
 
    public DynamicMetaObject FallbackSetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject value)
    {
        return FallbackSetIndex(target, indexes, value, null);
    }
 
    public abstract DynamicMetaObject FallbackSetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject value, DynamicMetaObject? errorSuggestion);
}