diff options
Diffstat (limited to 'test/files/run/macro-vampire-false-warning/Macros_1.scala')
-rw-r--r-- | test/files/run/macro-vampire-false-warning/Macros_1.scala | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/test/files/run/macro-vampire-false-warning/Macros_1.scala b/test/files/run/macro-vampire-false-warning/Macros_1.scala new file mode 100644 index 0000000000..2d384fbb85 --- /dev/null +++ b/test/files/run/macro-vampire-false-warning/Macros_1.scala @@ -0,0 +1,52 @@ +// As per http://meta.plasm.us/posts/2013/08/31/feeding-our-vampires/ + +import scala.annotation.StaticAnnotation +import scala.reflect.macros.Context +import scala.language.experimental.macros + +class body(tree: Any) extends StaticAnnotation + +object Macros { + def selFieldImpl(c: Context) = { + import c.universe._ + val field = c.macroApplication.symbol + val bodyAnn = field.annotations.filter(_.tpe <:< typeOf[body]).head + c.Expr[Any](bodyAnn.scalaArgs.head) + } + + def mkObjectImpl(c: Context)(xs: c.Expr[Any]*) = { + import c.universe._ + import Flag._ + // val kvps = xs.toList map { case q"${_}(${Literal(Constant(name: String))}).->[${_}]($value)" => name -> value } + val kvps = xs.map(_.tree).toList map { case Apply(TypeApply(Select(Apply(_, List(Literal(Constant(name: String)))), _), _), List(value)) => name -> value } + // val fields = kvps map { case (k, v) => q"@body($v) def ${TermName(k)} = macro Macros.selFieldImpl" } + val fields = kvps map { case (k, v) => DefDef( + Modifiers(MACRO, tpnme.EMPTY, List(Apply(Select(New(Ident(TypeName("body"))), nme.CONSTRUCTOR), List(v)))), + TermName(k), Nil, Nil, TypeTree(), Select(Ident(TermName("Macros")), TermName("selFieldImpl"))) } + // q"import scala.language.experimental.macros; class Workaround { ..$fields }; new Workaround{}" + c.Expr[Any](Block( + List( + Import(Select(Select(Ident(TermName("scala")), TermName("language")), TermName("experimental")), List(ImportSelector(TermName("macros"), 51, TermName("macros"), 51))), + ClassDef( + NoMods, TypeName("Workaround"), Nil, + Template( + List(Select(Ident(TermName("scala")), TypeName("AnyRef"))), noSelfType, + DefDef( + NoMods, nme.CONSTRUCTOR, Nil, List(Nil), TypeTree(), + Block(List(Apply(Select(Super(This(tpnme.EMPTY), tpnme.EMPTY), nme.CONSTRUCTOR), List())), Literal(Constant(())))) + +: fields)), + ClassDef( + Modifiers(FINAL), TypeName("$anon"), Nil, + Template( + List(Ident(TypeName("Workaround"))), noSelfType, + List( + DefDef( + NoMods, nme.CONSTRUCTOR, Nil, List(Nil), TypeTree(), + Block(List(Apply(Select(Super(This(tpnme.EMPTY), tpnme.EMPTY), nme.CONSTRUCTOR), List())), Literal(Constant(())))))))), + Apply(Select(New(Ident(TypeName("$anon"))), nme.CONSTRUCTOR), List()))) + } +} + +object mkObject { + def apply(xs: Any*) = macro Macros.mkObjectImpl +} |