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https://issues.apache.org/jira/browse/TINKERPOP-1854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16361996#comment-16361996
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ASF GitHub Bot commented on TINKERPOP-1854:
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Github user jorgebay commented on a diff in the pull request:
https://github.com/apache/tinkerpop/pull/792#discussion_r167789173
--- 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 think we should use an interface `ILambda` similar to java's counterpart:
https://github.com/apache/tinkerpop/blob/3.2.7/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/util/function/Lambda.java#L33
`Lambda.Groovy()` and `Lambda.Python()` could return `ILambda` instances.
That way we can have a compile type check for methods like `Filter()`,
`Until()`, etc... to accept only `ILambda` instances.
> 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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