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Work around scalac issue causing boxing. 

Tableswitch slightly cheaper than a couple million trips
through the Byte box.
This commit is contained in:
Paul Phillips 2012-04-16 19:19:27 +01:00
parent 1537a9d6b1
commit 6c090313da
1 changed files with 12 additions and 10 deletions
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8
util/classfile/Parser.scala
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@ -5,6 +5,7 @@ package sbt
package classfile
import java.io.{DataInputStream, File, InputStream}
import scala.annotation.switch
// Translation of jdepend.framework.ClassFileParser by Mike Clark, Clarkware Consulting, Inc.
// BSD Licensed
@ -132,11 +133,12 @@ private[sbt] object Parser
pool
}
private def getConstant(in: DataInputStream) =
private def getConstant(in: DataInputStream): Constant =
{
val tag = in.readByte()
tag match
{
// No switch for byte scrutinees! Stupid compiler.
((tag: Int): @switch) match {
case ConstantClass | ConstantString => new Constant(tag, in.readUnsignedShort())
case ConstantField | ConstantMethod | ConstantInterfaceMethod | ConstantNameAndType =>
new Constant(tag, in.readUnsignedShort(), in.readUnsignedShort())