GetIndexBinder.cs

using System.Dynamic.Utils;

namespace System.Dynamic
{
    [global::__DynamicallyInvokable]
    public abstract class GetIndexBinder : DynamicMetaObjectBinder
    {
        private readonly CallInfo _callInfo;

        [global::__DynamicallyInvokable]
        public sealed override Type ReturnType
        {
            [global::__DynamicallyInvokable]
            get
            {
                return typeof(object);
            }
        }

        [global::__DynamicallyInvokable]
        public CallInfo CallInfo
        {
            [global::__DynamicallyInvokable]
            get
            {
                return _callInfo;
            }
        }

        internal sealed override bool IsStandardBinder => true;

        [global::__DynamicallyInvokable]
        protected GetIndexBinder(CallInfo callInfo)
        {
            ContractUtils.RequiresNotNull(callInfo, "callInfo");
            _callInfo = callInfo;
        }

        [global::__DynamicallyInvokable]
        public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
        {
            ContractUtils.RequiresNotNull(target, "target");
            ContractUtils.RequiresNotNullItems(args, "args");
            return target.BindGetIndex(this, args);
        }

        [global::__DynamicallyInvokable]
        public DynamicMetaObject FallbackGetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes)
        {
            return FallbackGetIndex(target, indexes, null);
        }

        [global::__DynamicallyInvokable]
        public abstract DynamicMetaObject FallbackGetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject errorSuggestion);
    }
}