diff options
3 files changed, 30 insertions, 0 deletions
diff --git a/src/compiler/scala/tools/nsc/typechecker/Implicits.scala b/src/compiler/scala/tools/nsc/typechecker/Implicits.scala index 025c262c8d..fdec1edcc0 100644 --- a/src/compiler/scala/tools/nsc/typechecker/Implicits.scala +++ b/src/compiler/scala/tools/nsc/typechecker/Implicits.scala @@ -659,6 +659,8 @@ trait Implicits { if (context.hasErrors) fail("hasMatchingSymbol reported error: " + context.firstError.get.errMsg) + else if (itree3.isErroneous) + fail("error typechecking implicit candidate") else if (isLocal && !hasMatchingSymbol(itree2)) fail("candidate implicit %s is shadowed by %s".format( info.sym.fullLocationString, itree2.symbol.fullLocationString)) diff --git a/test/files/pos/macro-implicit-invalidate-on-error.check b/test/files/pos/macro-implicit-invalidate-on-error.check new file mode 100644 index 0000000000..e69de29bb2 --- /dev/null +++ b/test/files/pos/macro-implicit-invalidate-on-error.check diff --git a/test/files/pos/macro-implicit-invalidate-on-error.scala b/test/files/pos/macro-implicit-invalidate-on-error.scala new file mode 100644 index 0000000000..22cd2d34b4 --- /dev/null +++ b/test/files/pos/macro-implicit-invalidate-on-error.scala @@ -0,0 +1,28 @@ +package scala.reflect +package api + +import scala.language.experimental.macros +import scala.reflect.macros.Context + +trait Liftable[T] { + def apply(universe: api.Universe, value: T): universe.Tree +} + +object Liftable { + implicit def liftCaseClass[T <: Product]: Liftable[T] = macro liftCaseClassImpl[T] + + def liftCaseClassImpl[T: c.WeakTypeTag](c: Context): c.Expr[Liftable[T]] = { + import c.universe._ + val tpe = weakTypeOf[T] + if (!tpe.typeSymbol.asClass.isCaseClass) c.abort(c.enclosingPosition, "denied") + val p = List(q"Literal(Constant(1))") + c.Expr[Liftable[T]] { q""" + new scala.reflect.api.Liftable[$tpe] { + def apply(universe: scala.reflect.api.Universe, value: $tpe): universe.Tree = { + import universe._ + Apply(Select(Ident(TermName("C")), TermName("apply")), List(..$p)) + } + } + """ } + } +} |