use scala.runtime.Statics.ioobe. forward port of Scala 2 #7086 #23971
Description
Compiler version
3.7.3
Minimized code
scalac -Xprint:genBCode A.scala
case class A(x: Int)Output
override def productElement(n: Int): Object =
Int.box(
matchResult2[Int]:
{
case val x3: Int = n
if 0 == x3 then return[matchResult2] this._1() else ()
throw new IndexOutOfBoundsException(Int.box(n).toString())
}
)
override def productElementName(n: Int): String =
matchResult3[String]:
{
case val x4: Int = n
if 0 == x4 then return[matchResult3] "x" else ()
throw new IndexOutOfBoundsException(Int.box(n).toString())
}javap result
public java.lang.Object productElement(int);
descriptor: (I)Ljava/lang/Object;
flags: (0x0001) ACC_PUBLIC
Code:
stack=3, locals=3, args_size=2
0: iload_1
1: istore_2
2: iconst_0
3: iload_2
4: if_icmpne 14
7: aload_0
8: invokevirtual #90 // Method _1:()I
11: goto 29
14: new #92 // class java/lang/IndexOutOfBoundsException
17: dup
18: iload_1
19: invokestatic #98 // Method scala/runtime/BoxesRunTime.boxToInteger:(I)Ljava/lang/Integer;
22: invokevirtual #102 // Method java/lang/Integer.toString:()Ljava/lang/String;
25: invokespecial #105 // Method java/lang/IndexOutOfBoundsException."<init>":(Ljava/lang/String;)V
28: athrow
29: invokestatic #98 // Method scala/runtime/BoxesRunTime.boxToInteger:(I)Ljava/lang/Integer;
32: areturn
Expectation
- use
scala.runtime.Statics.ioobefor reduce class file size - Use a java static to throw IndexOutOfBoundsException scala#7086