System.ArgumentException : Argument types do not match

[EvgenyMarchuk]

Hello. Thanks for the project
I have some problem. So the following problem occurs when I try to call with settings

public static string GetMemberName(this LambdaExpression memberSelector)
{
            var i = new Func<ITranslationSettings, ITranslationSettings>(s => s.ShowCapturedValues);

            return memberSelector.ToReadableString(i);
}

for the expression like
x => x.First().Currency

Stack Trace: 
Expression.Constant(Object value, Type type)
MemberAccessTranslation.For(MemberExpression memberAccess, ITranslationContext context)
ExpressionTranslation.GetDefaultTranslation(Expression expression)
ExpressionTranslation.GetTranslationFor(Expression expression)
PublicTranslationContextExtensions.GetCodeBlockTranslationFor(ITranslationContext context, Expression expression)
LambdaTranslation.ctor(LambdaExpression lambda, ITranslationContext context)
ExpressionTranslation.GetDefaultTranslation(Expression expression)
ExpressionTranslation.GetTranslationFor(Expression expression)
ExpressionTranslation.GetTranslation()
ExpressionExtensions.ToReadableString(Expression expression, Func`2 configuration)
LambdaExpressionExtension.GetMemberName(LambdaExpression memberSelector) line 138

Can you tell me what kind of settings I need to use for this expression?
Thanks

[EvgenyMarchuk]

UPD: I'm not sure if this is correct but if you add it to the settings, it works

                    .AddTranslatorFor(ExpressionType.MemberAccess, (expr, _) =>
                    {
                        var member = (MemberExpression)expr;
                        return member.ToReadableString();
                    }));

[SteveWilkes]

Hi, thanks for the bug report! Could you let me know the type of your x variable? Maybe make a dotnetfiddle reproducing the issue? Thanks!

[EvgenyMarchuk]

I will try to reproduce the issue.
x is a list of objects with 2 properties
BalanceModel

1. Enum Currency
2. double Amount

[EvgenyMarchuk]

Sorry for the long answer.
Now you can repoduce the bug
So when you try to get value here

.ResponseValue(x => x.First().Currency == CurrencyType.EUR);

namespace ConsoleApp2
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            var balances = new List<BalanceModel>
                {
                    new()
                    {
                        Amount = 1,
                        Currency = CurrencyType.EUR
                    },
                    new()
                    {
                        Amount = 5,
                        Currency = CurrencyType.USD
                    },
                    new()
                    {
                        Amount = 10,
                        Currency = CurrencyType.GBP
                    }
            };

            new ResponseValidator<List<BalanceModel>>(balances)
                .ResponseValue(x => x.Count > 0)
                .ResponseValue(x => x.Any(c => c.Currency == CurrencyType.EUR))
                .ResponseValue(x => x.First().Currency == CurrencyType.EUR);
        }
    }

    public class ResponseValidator<T>
    {
        private readonly T _response;

        public ResponseValidator(T response)
        {
            _response = response;
        }

        public ResponseValidator<T> ResponseValue<TProperty>(Expression<Func<T, TProperty>> property)
        {
            var member = property.GetMember();
            var compiledProperty = property.Compile()(_response);

            Console.WriteLine($"{member}: {compiledProperty}");
            return this;
        }
    }

    public class BalanceModel
    {
        public double Amount { get; set; }
        public CurrencyType Currency { get; set; }
    }

    public enum CurrencyType
    {
        EUR,
        GBP,
        USD
    }

    public static class LambdaExpressionExtension
    {
        public static string GetMember(this LambdaExpression memberSelector)
        {
            var i = new Func<ITranslationSettings, ITranslationSettings>(s => s.ShowCapturedValues);

            return memberSelector.ToReadableString(i);
        }
    }
}

Console log

x => x.Count > 0: True
x => x.Any(c => ((int)c.Currency) == 0): True
Unhandled exception. System.ArgumentException: Argument types do not match

And small request, if it's posible - How to show string enum value not int?
x => x.Any(c => ((int)c.Currency) == 0): True - 0 is EUR
Thanks

[EvgenyMarchuk]

any updates?

[SteveWilkes]

Should all be possible to sort out - just a matter of getting around to it :)

[SteveWilkes]

The bug is fixed and the enum compairson shows the enum constant rather than its int value as of v4.1.1, which is now on NuGet.

Thanks for the feedback and patience!

Steve

[EvgenyMarchuk]

Thanks. Looks great!