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distribution can now be built with that option, with or without
optimization, and almost all tests cases can. (Those which can't are due
to different -Ycheck: issues.)
Major changes of interest are as follows:
* LOAD_EXCEPTION and THROW are parameterized on the throwable symbol.
* Does not squash all traits down to AnyRef, but instead deals with
issues as they arise. By observation the cases where one needs a "Foo
with Product" to manifest as both a "Foo" and a "Product" at different
places are quite rare, so we need not throw out the whole baby. *
Exception handlers now have positions. * The remaining checker failures
removed, such as CALL_METHOD wanting to pop a value off the stack
after calling a constructor. * Many multiply defined values such as
REFERENCE(ObjectClass) put in one place (ICodes.scala) and reused. *
-Ycheck:icode output (if also given -Ydebug) worthy of Michelangelo.
Here is a class and the -Ycheck:icode -Ydebug output for f's block.
class A {
def f(x: Int, y: String) =
try println(x + y.length)
catch { case x: NullPointerException => () }
}
** Checking Block 4 [S: 3, 2] [P: 1] <closed>
1-> REF(singleton class Predef) 3 + LOAD_MODULE object Predef
2-> INT 3 + LOAD_LOCAL(value x)
3-> REF(class String) 3 + LOAD_LOCAL(value y)
2<- REF(class String) 3 - CALL_METHOD java.lang.String.length (dynamic)
3-> INT 3 + CALL_METHOD java.lang.String.length (dynamic)
2<- INT 3 - CALL_PRIMITIVE(Arithmetic(ADD,INT))
1<- INT 3 - """
2-> INT 3 + CALL_PRIMITIVE(Arithmetic(ADD,INT))
1<- INT 3 - BOX INT
2-> REF(class Integer) 3 + BOX INT
1<- REF(class Integer) 3 - CALL_METHOD scala.Predef.println (dynamic)
0<- REF(singleton class Predef) 3 - CALL_METHOD scala.Predef.println (dynamic)
Review by dragos (I marked the specific spots I thought of interest with
"PP to ID" which makes it sound like I'm talking to my primal self. Next
week on programmer theater: "PP to SUPEREGO.")
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