diff options
| -rw-r--r-- | src/compiler/scala/tools/nsc/transform/Constructors.scala | 16 | ||||
| -rw-r--r-- | src/compiler/scala/tools/nsc/transform/UnCurry.scala | 18 |
2 files changed, 18 insertions, 16 deletions
diff --git a/src/compiler/scala/tools/nsc/transform/Constructors.scala b/src/compiler/scala/tools/nsc/transform/Constructors.scala index 2828e87bd8..6ecdd2b195 100644 --- a/src/compiler/scala/tools/nsc/transform/Constructors.scala +++ b/src/compiler/scala/tools/nsc/transform/Constructors.scala @@ -631,21 +631,11 @@ abstract class Constructors extends Statics with Transform with ast.TreeDSL { // recurse on class definition, store in defBuf case _: ClassDef => defBuf += new ConstructorTransformer(unit).transform(stat) - // all methods except the primary constructor go into template + // methods (except primary constructor) go into template + // (non-primary ctors --> auxConstructorBuf / regular defs --> defBuf) case _: DefDef if statSym.isPrimaryConstructor => () case _: DefDef if statSym.isConstructor => auxConstructorBuf += stat - - // other methods go to defBuf - // methods with ConstantType result get the corresponding Literal for their RHS - case _: DefDef => - val resTp = statSym.info.resultType - def mkLiteral(rhs: Tree) = gen.mkAttributedQualifier(resTp) setPos rhs.pos - - val literalized = - if (resTp.isInstanceOf[ConstantType] && statSym.info.params.isEmpty) deriveDefDef(stat)(mkLiteral) - else stat - - defBuf += literalized + case _: DefDef => defBuf += stat // val defs with constant right-hand sides are eliminated. case _: ValDef if statSym.info.isInstanceOf[ConstantType] => () diff --git a/src/compiler/scala/tools/nsc/transform/UnCurry.scala b/src/compiler/scala/tools/nsc/transform/UnCurry.scala index 72e2174bf8..79a77d7a0c 100644 --- a/src/compiler/scala/tools/nsc/transform/UnCurry.scala +++ b/src/compiler/scala/tools/nsc/transform/UnCurry.scala @@ -582,6 +582,7 @@ abstract class UnCurry extends InfoTransform } case dd @ DefDef(_, _, _, vparamss0, _, rhs0) => + val ddSym = dd.symbol val (newParamss, newRhs): (List[List[ValDef]], Tree) = if (dependentParamTypeErasure isDependent dd) dependentParamTypeErasure erase dd @@ -593,11 +594,22 @@ abstract class UnCurry extends InfoTransform (vparamss1, rhs0) } + // A no-arg method with ConstantType result type can safely be reduced to the corresponding Literal + // (only pure methods are typed as ConstantType). We could also do this for methods with arguments, + // after ensuring the arguments are not referenced. + val literalRhsIfConst = + if (newParamss.head.isEmpty) { // We know newParamss.length == 1 from above + ddSym.info.resultType match { + case tp@ConstantType(value) => Literal(value) setType tp setPos newRhs.pos // inlining of gen.mkAttributedQualifier(tp) + case _ => newRhs + } + } else newRhs + val flatdd = copyDefDef(dd)( vparamss = newParamss, - rhs = nonLocalReturnKeys get dd.symbol match { - case Some(k) => atPos(newRhs.pos)(nonLocalReturnTry(newRhs, k, dd.symbol)) - case None => newRhs + rhs = nonLocalReturnKeys get ddSym match { + case Some(k) => atPos(newRhs.pos)(nonLocalReturnTry(literalRhsIfConst, k, ddSym)) + case None => literalRhsIfConst } ) addJavaVarargsForwarders(dd, flatdd) |