InstanceMethodCallExpressionN.cs

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using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Dynamic.Utils;
using System.Reflection;
 
namespace System.Linq.Expressions;
 
internal sealed class InstanceMethodCallExpressionN : InstanceMethodCallExpression, IArgumentProvider
{
    private IReadOnlyList<Expression> _arguments;
 
    public override int ArgumentCount => _arguments.Count;
 
    public InstanceMethodCallExpressionN(MethodInfo method, Expression instance, IReadOnlyList<Expression> args)
        : base(method, instance)
    {
        _arguments = args;
    }
 
    public override Expression GetArgument(int index)
    {
        return _arguments[index];
    }
 
    internal override bool SameArguments(ICollection<Expression> arguments)
    {
        return ExpressionUtils.SameElements(arguments, _arguments);
    }
 
    internal override ReadOnlyCollection<Expression> GetOrMakeArguments()
    {
        return ExpressionUtils.ReturnReadOnly(ref _arguments);
    }
 
    internal override MethodCallExpression Rewrite(Expression instance, IReadOnlyList<Expression> args)
    {
        return Expression.Call(instance, base.Method, args ?? _arguments);
    }
}