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https://issues.apache.org/jira/browse/TINKERPOP-1854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362196#comment-16362196
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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_r167843703
--- Diff: docs/src/reference/gremlin-variants.asciidoc ---
@@ -436,6 +438,22 @@ NOTE: Many of the TraversalStrategy classes in
Gremlin.Net are proxies to the re
JVM-based Gremlin traversal machine. As such, their `Apply(ITraversal)`
method does nothing. However, the strategy is
encoded in the Gremlin.Net bytecode and transmitted to the Gremlin
traversal machine for re-construction machine-side.
+=== The Lambda Solution
+
+Supporting link:https://en.wikipedia.org/wiki/Anonymous_function[anonymous
functions] across languages is difficult as
+most languages do not support lambda introspection and thus, code
analysis. While Gremlin.Net doesn't support C# lambdas, it
+is still able to represent lambdas in other languages. When the lambda is
represented in `Bytecode` its language is encoded
+such that the remote connection host can infer which translator and
ultimate execution engine to use.
+
+[source,csharp]
+----
+g.V().Out().Map<int>(Lambda.Groovy("it.get().value('name').length()")).Sum<int>().ToList();
<1>
--- End diff --
I don't think that we need curly brackets here. It also looks like this for
Gremlin-Python in the docs: `map(lambda: ("it.get().value('name').length()",
"gremlin-groovy"))`
> 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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