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Add case class error message #5541

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Merged
merged 1 commit into from
Dec 7, 2018
Merged

Add case class error message #5541

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3 changes: 3 additions & 0 deletions compiler/src/dotty/tools/dotc/ast/Desugar.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -352,6 +352,9 @@ object desugar {
if (isCaseClass && originalTparams.isEmpty)
ctx.error(CaseClassMissingParamList(cdef), cdef.namePos)
ListOfNil
} else if (isCaseClass && originalVparamss.head.exists(_.mods.is(Implicit))) {
ctx.error("Case classes should have a non-implicit parameter list", cdef.namePos)
ListOfNil
}
else originalVparamss.nestedMap(toDefParam)
val constr = cpy.DefDef(constr1)(tparams = constrTparams, vparamss = constrVparamss)
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1 change: 1 addition & 0 deletions tests/neg/5541.scala
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@@ -0,0 +1 @@
case class Foo(implicit i: Int) // error: Case classes should have a non-implicit parameter list