diff options
-rwxr-xr-x | build.xml | 12 | ||||
-rw-r--r-- | src/library/scala/reflect/ClassTag.scala | 39 | ||||
-rw-r--r-- | test/junit/scala/reflect/ClassTag.scala | 29 |
3 files changed, 50 insertions, 30 deletions
@@ -1445,15 +1445,7 @@ TODO: <stopwatch name="quick.sbt-interface.timer" action="total"/> </target> - <target name="test.junit.init" depends="quick.done"> - <uptodate property="test.junit.available" targetfile="${build-junit.dir}/test-compile.complete"> - <srcfiles dir="${test.junit.src}"> - <include name="**/*.scala"/> - </srcfiles> - </uptodate> - </target> - - <target name="test.junit.comp" depends="test.junit.init, quick.done" unless="test.junit.available"> + <target name="test.junit.comp" depends="pack.done"> <stopwatch name="test.junit.compiler.timer"/> <mkdir dir="${test.junit.classes}"/> <scalacfork @@ -1469,7 +1461,7 @@ TODO: <stopwatch name="test.junit.compiler.timer" action="total"/> </target> - <target name="test.junit" depends="test.junit.comp, test.junit.init"> + <target name="test.junit" depends="test.junit.comp"> <stopwatch name="test.junit.timer"/> <mkdir dir="${test.junit.classes}"/> <echo message="Note: details of failed tests will be output to ${build-junit.dir}"/> diff --git a/src/library/scala/reflect/ClassTag.scala b/src/library/scala/reflect/ClassTag.scala index 2f4aa9cb84..9dd96183da 100644 --- a/src/library/scala/reflect/ClassTag.scala +++ b/src/library/scala/reflect/ClassTag.scala @@ -69,22 +69,22 @@ trait ClassTag[T] extends ClassManifestDeprecatedApis[T] with Equals with Serial * `SomeExtractor(...)` is turned into `ct(SomeExtractor(...))` if `T` in `SomeExtractor.unapply(x: T)` * is uncheckable, but we have an instance of `ClassTag[T]`. */ - def unapply(x: Any): Option[T] = x match { - case null => None - case b: Byte => unapply(b) - case s: Short => unapply(s) - case c: Char => unapply(c) - case i: Int => unapply(i) - case l: Long => unapply(l) - case f: Float => unapply(f) - case d: Double => unapply(d) - case b: Boolean => unapply(b) - case u: Unit => unapply(u) - case a: Any => unapplyImpl(a) - } + def unapply(x: Any): Option[T] = + if (null != x && ( + (runtimeClass.isInstance(x)) + || (x.isInstanceOf[Byte] && runtimeClass.isAssignableFrom(classOf[Byte])) + || (x.isInstanceOf[Short] && runtimeClass.isAssignableFrom(classOf[Short])) + || (x.isInstanceOf[Char] && runtimeClass.isAssignableFrom(classOf[Char])) + || (x.isInstanceOf[Int] && runtimeClass.isAssignableFrom(classOf[Int])) + || (x.isInstanceOf[Long] && runtimeClass.isAssignableFrom(classOf[Long])) + || (x.isInstanceOf[Float] && runtimeClass.isAssignableFrom(classOf[Float])) + || (x.isInstanceOf[Double] && runtimeClass.isAssignableFrom(classOf[Double])) + || (x.isInstanceOf[Boolean] && runtimeClass.isAssignableFrom(classOf[Boolean])) + || (x.isInstanceOf[Unit] && runtimeClass.isAssignableFrom(classOf[Unit]))) + ) Some(x.asInstanceOf[T]) + else None - // TODO: Inline the bodies of these into the Any-accepting unapply overload above and delete them. - // This cannot be done until at least 2.12.0 for reasons of binary compatibility + // TODO: deprecate overloads in 2.12.0, remove in 2.13.0 def unapply(x: Byte) : Option[T] = unapplyImpl(x, classOf[Byte]) def unapply(x: Short) : Option[T] = unapplyImpl(x, classOf[Short]) def unapply(x: Char) : Option[T] = unapplyImpl(x, classOf[Char]) @@ -94,11 +94,10 @@ trait ClassTag[T] extends ClassManifestDeprecatedApis[T] with Equals with Serial def unapply(x: Double) : Option[T] = unapplyImpl(x, classOf[Double]) def unapply(x: Boolean) : Option[T] = unapplyImpl(x, classOf[Boolean]) def unapply(x: Unit) : Option[T] = unapplyImpl(x, classOf[Unit]) - - private[this] def unapplyImpl(x: Any, alternative: jClass[_] = null): Option[T] = { - val conforms = runtimeClass.isAssignableFrom(x.getClass) || (alternative != null && runtimeClass.isAssignableFrom(alternative)) - if (conforms) Some(x.asInstanceOf[T]) else None - } + + private[this] def unapplyImpl(x: Any, primitiveCls: java.lang.Class[_]): Option[T] = + if (runtimeClass.isInstance(x) || runtimeClass.isAssignableFrom(primitiveCls)) Some(x.asInstanceOf[T]) + else None // case class accessories override def canEqual(x: Any) = x.isInstanceOf[ClassTag[_]] diff --git a/test/junit/scala/reflect/ClassTag.scala b/test/junit/scala/reflect/ClassTag.scala new file mode 100644 index 0000000000..90cc981fc1 --- /dev/null +++ b/test/junit/scala/reflect/ClassTag.scala @@ -0,0 +1,29 @@ +package scala.reflect + +import org.junit.Test +import org.junit.Assert._ +import org.junit.runner.RunWith +import org.junit.runners.JUnit4 + +import scala.tools.testing.AssertUtil._ + +class Misc + +@RunWith(classOf[JUnit4]) +class ClassTagTest { + def checkNotString[A: ClassTag](a: Any) = a match { case x: String => false case x: A => true case _ => false } + def checkNotInt[A: ClassTag](a: Any) = a match { case x: Int => false case x: A => true case _ => false } + def checkNotLong[A: ClassTag](a: Any) = a match { case x: Long => false case x: A => true case _ => false } + + @Test def checkMisc = assertTrue(checkNotString[Misc](new Misc)) + @Test def checkString = assertTrue(checkNotInt[String] ("woele")) + @Test def checkByte = assertTrue(checkNotInt[Byte] (0.toByte)) + @Test def checkShort = assertTrue(checkNotInt[Short] (0.toShort)) + @Test def checkChar = assertTrue(checkNotInt[Char] (0.toChar)) + @Test def checkInt = assertTrue(checkNotLong[Int] (0.toInt)) + @Test def checkLong = assertTrue(checkNotInt[Long] (0.toLong)) + @Test def checkFloat = assertTrue(checkNotInt[Float] (0.toFloat)) + @Test def checkDouble = assertTrue(checkNotInt[Double] (0.toDouble)) + @Test def checkBoolean = assertTrue(checkNotInt[Boolean](false)) + @Test def checkUnit = assertTrue(checkNotInt[Unit] ({})) +}
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