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Manifest methods are 'still' deprecated #6742

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scabug opened this issue Nov 30, 2012 · 5 comments
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Manifest methods are 'still' deprecated #6742

scabug opened this issue Nov 30, 2012 · 5 comments
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2.10.0

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scabug commented Nov 30, 2012

From what I understand Manifest was un-deprecated.

But it looks surprising that a bunch of his methods (<:<, >:>, erasure) are deprecated:
http://www.scala-lang.org/archives/downloads/distrib/files/nightly/docs/library/index.html#scala.reflect.Manifest

Sounds like it should be completely deprecated or not, am I missing something?
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scabug commented Nov 30, 2012

Imported From: https://issues.scala-lang.org/browse/SI-6742?orig=1
Reporter: Alois Cochard (aloiscochard)
Affected Versions: 2.10.0-RC3

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scabug commented Nov 30, 2012

@SethTisue said:
Seems like an oversight. evidence: the deprecation message says "Use scala.reflect.runtime.universe.TypeTag for subtype checking instead". But (unlike ClassTag) TypeTag is experimental in 2.10, and methods shouldn't be deprecated if the alternatives are still experimental.

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scabug commented Dec 2, 2012

@xeno-by said:
scala/scala#1694

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scabug commented Dec 5, 2012

@xeno-by said:
jsuereth commented:

We talked about it earlier and decided the existing behavior of <;< needed to be depreacted. While TypeTags aren't "stable" yet, the behavior of <:< is something we want people not to use regardless of whether or not TypeTags become stable...

@scabug scabug closed this as completed Dec 5, 2012
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scabug commented Dec 5, 2012

@SethTisue said:
I see. Makes sense.

btw, in case anyone sees this and gets confused (as I did for a little bit just now): Predef has classes called <:< etc, used to implement methods such as toMap. Those classes are not deprecated. This ticket isn't about them. It's about the methods on Manifest.

@scabug scabug added this to the 2.10.0 milestone Apr 7, 2017
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