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Reflect symbols for method-local case classes report isJava=true, isCaseClass=false #8639

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scabug opened this issue Jun 1, 2014 · 3 comments
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Reflect symbols for method-local case classes report isJava=true, isCaseClass=false #8639

scabug opened this issue Jun 1, 2014 · 3 comments
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reflection
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@scabug
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scabug commented Jun 1, 2014 

import scala.reflect.runtime.{universe => ru}

def f() = {
  case class Foo()
  val cls = classOf[Foo]
  val m = ru.runtimeMirror(cls.getClassLoader)
  val sym = m.classSymbol(cls)
  assert(sym.isCaseClass)
  assert(!sym.isJava)
}

f()

Either assertion fails.
@scabug
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scabug commented Jun 1, 2014

Imported From: https://issues.scala-lang.org/browse/SI-8639?orig=1
Reporter: Christopher Currie (codemonkey)
Affected Versions: 2.10.4, 2.11.1

@scabug
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scabug commented Jun 1, 2014

@retronym said:
Reflection on local classes is sort of a best-effort affair as Scala doesn't pickle the type signatures of these (to keep bytecode size small), so runtime reflection treats them in the same way it treats Java defined classes -- by recovering what it can from Java generic signatures.

@scabug scabug added this to the Backlog milestone Apr 7, 2017
@SethTisue
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working as designed

@SethTisue SethTisue closed this as not planned Won't fix, can't repro, duplicate, stale Mar 18, 2023
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@SethTisue @xeno-by @scabug