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value classes do not properly transform singleton types #6885

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scabug opened this issue Dec 27, 2012 · 2 comments
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value classes do not properly transform singleton types #6885

scabug opened this issue Dec 27, 2012 · 2 comments
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@scabug
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scabug commented Dec 27, 2012

class YouAreYourself[A <: AnyRef](val you: A) extends AnyVal {
  def yourself: you.type = you
}
uncaught exception during compilation: Types$TypeError("type mismatch;
 found   : YouAreYourself[A(in method yourself$extension)]#you.type (with underlying type A(in method yourself$extension))
 required: A(in class YouAreYourself)") @ scala.tools.nsc.typechecker.Contexts$Context.issueCommon(Contexts.scala:396)
error: scala.reflect.internal.Types$TypeError: type mismatch;
 found   : YouAreYourself[A(in method yourself$extension)]#you.type (with underlying type A(in method yourself$extension))
 required: A(in class YouAreYourself)
@scabug
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scabug commented Dec 27, 2012

Imported From: https://issues.scala-lang.org/browse/SI-6885?orig=1
Reporter: @paulp
Affected Versions: 2.10.0
Duplicates #6651

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scabug commented Dec 29, 2012

@retronym said:
Dup of #6651

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