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1) Deprecates much of Predef and scala.Console, especially:
- the read* methods (see below)
- the set{Out,Err,In} methods (see SI-4793)
2) Removed long-deprecated:
- Predef#exit
- Predef#error should have gone, but could not due to sbt
At least the whole source base has now been future-proofed
against the eventual removal of Predef#error.
The low justification for the read* methods should be readily
apparent: they are little used and have no call to be in global
namespace, especially given their weird ad hoc semantics and
unreasonably tempting names such as readBoolean().
3) Segregated the deprecated elements in Predef from the part
which still thrives.
4) Converted all the standard Predef implicits into implicit
classes, value classes where possible:
- ArrowAssoc, Ensuring, StringFormat, StringAdd, RichException (value)
- SeqCharSequence, ArrayCharSequence (non-value)
Non-implicit deprecated stubs prop up the names of the
formerly converting methods.
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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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including "CheckEither", written against scalacheck 1.2 in the year 471
AD. Removed all the duplicates I could find, mostly between pending
and files. Renamed a bunch of tests so they wouldn't look like likely
duplicates next time around. Nominated somebody else to do this once in
a while.
No review.
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