protected override Expression VisitMember // <-- Need to realize caching scenario by Expression and Compile for Expression Tree (see here: https://stackoverflow.com/questions/38528620/c-sharp-fieldinfo-reflection-alternatives)
(MemberExpression memberExpression)
{
// Recurse down to see if we can simplify...
var expression = Visit(memberExpression.Expression);
// If we've ended up with a constant, and it's a property or a field,
// we can simplify ourselves to a constant
if (expression is ConstantExpression)
{
object container = ((ConstantExpression)expression).Value;
var member = memberExpression.Member;
if (member is FieldInfo)
{
object value = ((FieldInfo)member).GetValue(container);
if (value.GetType().IsGenericPipeline())
{
return(Expression.Constant(EnumerableExtensions.AnonymousGenericEnumerableToList(value)));
}
//if (value.GetType().GetInterfaces().Select(e => e.GetGenericTypeDefinition()).Contains(typeof(IEnumerable<>)))
//{
// var asEnumerableMethod = typeof(Enumerable).GetMethod(nameof(Enumerable.ToList)).MakeGenericMethod(value.GetType().GetGenericArguments());
// var asEnumerabled = asEnumerableMethod.Invoke(null, new object[] { value });
//
// return Expression.Constant(asEnumerabled, asEnumerabled.GetType());
//}
return(Expression.Constant(value));
}
if (member is PropertyInfo)
{
object value = ((PropertyInfo)member).GetValue(container, null);
if (value.GetType().IsGenericEnumerable())
{
return(Expression.Constant(EnumerableExtensions.AnonymousGenericEnumerableToList(value)));
}
return(Expression.Constant(value));
}
}
return(base.VisitMember(memberExpression));
}