diff options
Diffstat (limited to 'compiler/src/dotty/tools/dotc/transform/ClassOf.scala')
-rw-r--r-- | compiler/src/dotty/tools/dotc/transform/ClassOf.scala | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/compiler/src/dotty/tools/dotc/transform/ClassOf.scala b/compiler/src/dotty/tools/dotc/transform/ClassOf.scala new file mode 100644 index 000000000..e7b6977c7 --- /dev/null +++ b/compiler/src/dotty/tools/dotc/transform/ClassOf.scala @@ -0,0 +1,30 @@ +package dotty.tools.dotc +package transform + +import ast.tpd +import core.Constants.Constant +import core.Contexts.Context +import core.StdNames.nme +import core.Symbols.{defn,TermSymbol} +import core.TypeErasure +import TreeTransforms.{MiniPhaseTransform, TransformerInfo, TreeTransform} + +/** Rewrite `classOf` calls as follow: + * + * For every primitive class C whose boxed class is called B: + * classOf[C] -> B.TYPE + * For every non-primitive class D: + * classOf[D] -> Literal(Constant(erasure(D))) + */ +class ClassOf extends MiniPhaseTransform { + import tpd._ + + override def phaseName: String = "classOf" + + override def transformTypeApply(tree: TypeApply)(implicit ctx: Context, info: TransformerInfo): Tree = + if (tree.symbol eq defn.Predef_classOf) { + val targ = tree.args.head.tpe + clsOf(targ).ensureConforms(tree.tpe).withPos(tree.pos) + } + else tree +} |