diff options
Diffstat (limited to 'test/files/neg/macro-blackbox-dynamic-materialization')
-rw-r--r-- | test/files/neg/macro-blackbox-dynamic-materialization/Macros_1.scala | 25 | ||||
-rw-r--r-- | test/files/neg/macro-blackbox-dynamic-materialization/Test_2.scala | 4 |
2 files changed, 29 insertions, 0 deletions
diff --git a/test/files/neg/macro-blackbox-dynamic-materialization/Macros_1.scala b/test/files/neg/macro-blackbox-dynamic-materialization/Macros_1.scala new file mode 100644 index 0000000000..fc2907b6dc --- /dev/null +++ b/test/files/neg/macro-blackbox-dynamic-materialization/Macros_1.scala @@ -0,0 +1,25 @@ +import scala.reflect.macros.blackbox.Context +import scala.language.experimental.macros + +trait Foo[T] + +class C1(val x: Int) +class C2(val x: String) + +trait LowPriority { + implicit def lessSpecific[T]: Foo[T] = null +} + +object Foo extends LowPriority { + implicit def moreSpecific[T]: Foo[T] = macro Macros.impl[T] +} + +object Macros { + def impl[T: c.WeakTypeTag](c: Context) = { + import c.universe._ + val tpe = weakTypeOf[T] + if (tpe.members.exists(_.info =:= typeOf[Int])) + c.abort(c.enclosingPosition, "I don't like classes that contain integers") + q"new Foo[$tpe]{ override def toString = ${tpe.toString} }" + } +}
\ No newline at end of file diff --git a/test/files/neg/macro-blackbox-dynamic-materialization/Test_2.scala b/test/files/neg/macro-blackbox-dynamic-materialization/Test_2.scala new file mode 100644 index 0000000000..bf19209ab7 --- /dev/null +++ b/test/files/neg/macro-blackbox-dynamic-materialization/Test_2.scala @@ -0,0 +1,4 @@ +object Test extends App { + println(implicitly[Foo[C1]]) + println(implicitly[Foo[C2]]) +}
\ No newline at end of file |