1 files changed, 110 insertions, 0 deletions
diff --git a/examples/scala-js/javalanglib/src/main/scala/java/lang/Double.scala b/examples/scala-js/javalanglib/src/main/scala/java/lang/Double.scala
new file mode 100644
index 0000000..25987ac
--- /dev/null
+++ b/examples/scala-js/javalanglib/src/main/scala/java/lang/Double.scala
@@ -0,0 +1,110 @@
+package java.lang
+
+import scala.scalajs.js
+
+/* This is a hijacked class. Its instances are primitive numbers.
+ * Constructors are not emitted.
+ */
+final class Double private () extends Number with Comparable[Double] {
+
+  def this(value: scala.Double) = this()
+  def this(s: String) = this()
+
+  @inline def doubleValue(): scala.Double =
+    this.asInstanceOf[scala.Double]
+
+  @inline override def byteValue(): scala.Byte = doubleValue.toByte
+  @inline override def shortValue(): scala.Short = doubleValue.toShort
+  @inline def intValue(): scala.Int = doubleValue.toInt
+  @inline def longValue(): scala.Long = doubleValue.toLong
+  @inline def floatValue(): scala.Float = doubleValue.toFloat
+
+  override def equals(that: Any): scala.Boolean = that match {
+    case that: Double =>
+      val a = doubleValue
+      val b = that.doubleValue
+      (a == b) || (Double.isNaN(a) && Double.isNaN(b))
+    case _ =>
+      false
+  }
+
+  @inline override def hashCode(): Int =
+    scala.scalajs.runtime.Bits.numberHashCode(doubleValue)
+
+  @inline override def compareTo(that: Double): Int =
+    Double.compare(doubleValue, that.doubleValue)
+
+  @inline override def toString(): String =
+    Double.toString(doubleValue)
+
+  @inline def isNaN(): scala.Boolean =
+    Double.isNaN(doubleValue)
+
+  @inline def isInfinite(): scala.Boolean =
+    Double.isInfinite(doubleValue)
+
+}
+
+object Double {
+  final val TYPE = classOf[scala.Double]
+  final val POSITIVE_INFINITY = 1.0 / 0.0
+  final val NEGATIVE_INFINITY = 1.0 / -0.0
+  final val NaN = 0.0 / 0.0
+  final val MAX_VALUE = scala.Double.MaxValue
+  final val MIN_VALUE = scala.Double.MinPositiveValue
+  final val MAX_EXPONENT = 1023
+  final val MIN_EXPONENT = -1022
+  final val SIZE = 64
+
+  @inline def valueOf(doubleValue: scala.Double): Double =
+    new Double(doubleValue)
+
+  @inline def valueOf(s: String): Double = valueOf(parseDouble(s))
+
+  private[this] lazy val doubleStrPat = new js.RegExp("^" +
+      "[\\x00-\\x20]*"   + // optional whitespace
+      "[+-]?"            + // optional sign
+      "(NaN|Infinity|"   + // special cases
+       "(\\d+\\.?\\d*|"  + // literal w/  leading digit
+        "\\.\\d+)"       + // literal w/o leading digit
+       "([eE][+-]?\\d+)?"+ // optional exponent
+      ")[fFdD]?"         + // optional float / double specifier (ignored)
+      "[\\x00-\\x20]*"   + // optional whitespace
+      "$")
+
+  def parseDouble(s: String): scala.Double = {
+    if (doubleStrPat.test(s))
+      js.parseFloat(s)
+    else
+      throw new NumberFormatException(s"""For input string: "$s"""")
+  }
+
+  @inline def toString(d: scala.Double): String =
+    "" + d
+
+  def compare(a: scala.Double, b: scala.Double): scala.Int = {
+    // NaN must equal itself, and be greater than anything else
+    if (isNaN(a)) {
+      if (isNaN(b)) 0
+      else 1
+    } else if (isNaN(b)) {
+      -1
+    } else {
+      if (a == b) 0
+      else if (a < b) -1
+      else 1
+    }
+  }
+
+  @inline def isNaN(v: scala.Double): scala.Boolean =
+    v != v
+
+  @inline def isInfinite(v: scala.Double): scala.Boolean =
+    v == POSITIVE_INFINITY || v == NEGATIVE_INFINITY
+
+  @inline def longBitsToDouble(bits: scala.Long): scala.Double =
+    scala.scalajs.runtime.Bits.longBitsToDouble(bits)
+
+  @inline def doubleToLongBits(value: scala.Double): scala.Long =
+    scala.scalajs.runtime.Bits.doubleToLongBits(value)
+}