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https://issues.apache.org/jira/browse/FLINK-8438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16327197#comment-16327197
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David Anderson commented on FLINK-8438:
---------------------------------------
This code (adapted from the Flink scala quickstart)
{code:java}
import org.apache.flink.api.scala._
import org.apache.flink.streaming.api.scala._
import org.apache.flink.api.common.typeinfo.BasicTypeInfo
import org.apache.flink.api.java.typeutils.TupleTypeInfo
import org.apache.flink.api.common.typeinfo.Types
val text = env.socketTextStream(hostName, port)
val foo = (x: String) => (x, 1)
val tuples = text.map(foo)
{code}
produces these errors when compiled by eclipse:
{noformat}
could not find implicit value for evidence parameter of type
org.apache.flink.api.common.typeinfo.TypeInformation[(String, Int)]
not enough arguments for method map: (implicit evidence$7:
org.apache.flink.api.common.typeinfo.TypeInformation[(String,
Int)])org.apache.flink.streaming.api.scala.DataStream[(String, Int)].
Unspecified value parameter evidence$7.
{noformat}
This code can be made to compile by using TypeInformation.of(), but the
resulting tuples are then GenericTypeInfo and don't really work.
TypeInformation.of() doesn't work properly with Scala classes.
> Ensure that implicit Scala TypeInformation works in Eclipse IDE
> ---------------------------------------------------------------
>
> Key: FLINK-8438
> URL: https://issues.apache.org/jira/browse/FLINK-8438
> Project: Flink
> Issue Type: Bug
> Components: Type Serialization System
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
>
> It seems that Scala macros do not work properly in the Eclipse IDE. We need
> to investigate this further and maybe need to update the Scala macros.
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