diff options
Diffstat (limited to 'test/files/run/macro-whitebox-dynamic-materialization/Macros_1.scala')
-rw-r--r-- | test/files/run/macro-whitebox-dynamic-materialization/Macros_1.scala | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/files/run/macro-whitebox-dynamic-materialization/Macros_1.scala b/test/files/run/macro-whitebox-dynamic-materialization/Macros_1.scala new file mode 100644 index 0000000000..87cd310b09 --- /dev/null +++ b/test/files/run/macro-whitebox-dynamic-materialization/Macros_1.scala @@ -0,0 +1,25 @@ +import scala.reflect.macros.WhiteboxContext +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: WhiteboxContext) = { + import c.universe._ + val tpe = weakTypeOf[T] + if (tpe.members.exists(_.typeSignature =:= 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 |