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https://issues.apache.org/jira/browse/TINKERPOP-1854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362190#comment-16362190
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ASF GitHub Bot commented on TINKERPOP-1854:
-------------------------------------------

Github user FlorianHockmann commented on a diff in the pull request:

    https://github.com/apache/tinkerpop/pull/792#discussion_r167842126
  
    --- Diff: gremlin-dotnet/glv/generate.groovy ---
    @@ -48,7 +48,7 @@ def toCSharpTypeMap = ["Long": "long",
                            "TraversalMetrics": "E2",
                            "Traversal": "ITraversal",
                            "Traversal[]": "ITraversal[]",
    -                       "Predicate": "TraversalPredicate",
    +                       "Predicate": "object",
    --- End diff --
    
    I don't know if you saw what I wrote in the initial post of this PR, but 
the problem is that those steps expect a `Function` in Java which is also 
implemented by enums like `T`. So, when we restrict them to something like 
`ILambda` in .NET then they can't take enum values anymore as enums can't 
implement interfaces in .NET.


> Support lambdas in Gremlin.Net
> ------------------------------
>
>                 Key: TINKERPOP-1854
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1854
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: dotnet
>    Affects Versions: 3.3.0, 3.2.6
>            Reporter: Florian Hockmann
>            Assignee: Florian Hockmann
>            Priority: Major
>
> Gremlin.Net should support lambdas. We already discussed this in [the pull 
> request for TINKERPOP-1752|https://github.com/apache/tinkerpop/pull/712]. 
> Here is what [~spmallette] said over there:
> {quote}
> Any reason we don't support lambdas? Even if .NET can't support them natively 
> for some reason wouldn't we minimally support the ability to pass a 
> python/groovy/etc lambda? it's kinda weird that way, but i think back to the 
> point that kuppitz made on the dev list the other day where he stated that he 
> doesn't always find a way out of using lambdas in production systems he works 
> on - so ultimately users will need that kind of capability i think.
> {quote}
> C# lambdas would require some kind of C# parser on the server side, so at 
> least in the beginning a way to send lambdas from already supported languages 
> in Gremlin.Net should be enough.



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