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Conflicts:
test/files/run/Meter.scala
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enforced. Super calls and specialized still missing.
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...since it works from source. The parser must be forcibly restrained
from adding a bogus constructor, but other than that it's pretty much
smooth sailing. To give an idea how smooth, if I change scala.Short like so:
trait Bippy extends Any
final class Short extends AnyVal with Bippy
Then it just works, at least until the fiction is revealed.
scala> def f(x: Bippy) = x
f: (x: Bippy)Bippy
scala> f(5)
<console>:9: error: type mismatch;
found : Int(5)
required: Bippy
f(5)
^
scala> f(5: Short)
java.lang.ClassCastException: java.lang.Short cannot be cast to scala.Bippy
at .<init>(<console>:9)
at .<clinit>(<console>)
at .<init>(<console>:11)
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Conflicts:
src/compiler/scala/tools/nsc/Global.scala
test/files/run/programmatic-main.check
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Conflicts:
src/compiler/scala/reflect/internal/Definitions.scala
src/compiler/scala/tools/nsc/typechecker/Namers.scala
src/library/scala/AnyVal.scala
test/files/run/primitive-sigs-2.check
test/files/run/t4172.check
test/files/scalap/abstractClass/result.test
test/files/scalap/abstractMethod/result.test
test/files/scalap/caseClass/result.test
test/files/scalap/cbnParam/result.test
test/files/scalap/classPrivate/result.test
test/files/scalap/classWithExistential/result.test
test/files/scalap/classWithSelfAnnotation/result.test
test/files/scalap/covariantParam/result.test
test/files/scalap/implicitParam/result.test
test/files/scalap/paramClauses/result.test
test/files/scalap/paramNames/result.test
test/files/scalap/sequenceParam/result.test
test/files/scalap/simpleClass/result.test
test/files/scalap/traitObject/result.test
test/files/scalap/typeAnnotations/result.test
test/files/scalap/valAndVar/result.test
test/files/scalap/wildcardType/result.test
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ScalaObject. Undoing wrong fix in ExtensionMethods.
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And grueling recovery from branch drift.
Merges a portion (and only a portion) of topic/inline into master.
The major changes which come with this merge are:
AnyVal is unsealed, can be extended directly.
ScalaObject is no longer with us.
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Conflicts:
lib/scala-compiler.jar.desired.sha1
lib/scala-library-src.jar.desired.sha1
lib/scala-library.jar.desired.sha1
src/compiler/scala/reflect/internal/Definitions.scala
src/compiler/scala/reflect/internal/Importers.scala
src/compiler/scala/reflect/internal/Symbols.scala
src/compiler/scala/reflect/internal/Trees.scala
src/compiler/scala/reflect/internal/Types.scala
src/compiler/scala/tools/nsc/Global.scala
src/compiler/scala/tools/nsc/transform/Erasure.scala
src/compiler/scala/tools/nsc/transform/LiftCode.scala
src/compiler/scala/tools/nsc/transform/UnCurry.scala
src/compiler/scala/tools/nsc/typechecker/RefChecks.scala
src/compiler/scala/tools/nsc/typechecker/Typers.scala
test/files/run/programmatic-main.check
test/files/speclib/instrumented.jar.desired.sha1
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Disabled failing scaladoc test rather than fixing it because they're too
hard to fix, even though it is almost certainly a trivial output change.
(The fact that I don't know for sure that it is a trivial output change
is also suboptimal.)
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I guess I have to suck up the "C with Object" here in order
to get the "Array[T with Object]" I need in a different test.
Now all tests pass for reals.
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And with that one, I believe all tests pass.
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-- traits can extend Any, AnyRef, or AnyVal
-- classes can extend AnyRef or AnyVal but not Any.
This breaks reflection for the moment as it smuggles AnyVal so far
downstream that it's reflecting its way into bytecode (or something)
but the following test case goes five for six as anticipated.
trait Foo1 extends Any
trait Foo2 extends AnyVal
trait Foo3 extends AnyRef
class Bar1 extends Any // fail
@inline class Bar2 extends AnyVal
class Bar3 extends AnyRef
Eliminated various hijinx from definitions.
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Fail compile if AnyVal is inherited by a trait, a non-@inline
class, or a class with an AnyRef parent somewhere. Added tests.
Added logging, like
[log extmethods] Inline class class Bippy spawns extension method.
Old: def getClass: Class[_ <: Bippy]
New: final def extension$getClass($this: Bippy): Class[_ <: Bippy]
Fixed what I hope was a bug in ExtensionMethods where the original
method params were dropped.
Since adding a NonNull parent was also inflicting an AnyRef on AnyVal
subclasses, suppressed that for those. Had the bright idea that AnyVal
could extend NotNull. It doesn't seem to accomplish much, but then,
I don't think NotNull accomplishes much. Still, maybe it's time to
restrict the ways one can use AnyVal so one can't do this:
scala> var x: AnyVal = _
x: AnyVal = null
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Conflicts:
src/compiler/scala/reflect/internal/Definitions.scala
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Temporarily removed getClass from AnyVal to get build going.
Disabled anyval-childen test.
Fixed some other build problems.
Implemented step 1 + 2 of inline classes proposal.
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Hacks here and there to allow them to survive at least
to erasure. Since nothing is done with them there yet, they
inevitably crash and burn a little ways beyond that.
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'axel22/feature/pc-execution-contexts' into develop
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- Renamed t960 to a more sensible name, because SI-960 is not related
to the test and I couldn't find a ticket number.
- Some minor fixes to @deprecated like switched or missing versions.
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'jsuereth/better-starr-flow' into develop
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several fixes to the standard library due to
- the safer type checker this fix gives us (thus, some casts had to be inserted)
- SI-5548
- type inference gets a bit more complicated, it needs help (chainl1 in combinator.Parsers)
To deal with the type slack between actual (run-time) types and statically known
types, for each abstract type T, reflect its variance as a skolem that is
upper-bounded by T (covariant position), or lower-bounded by T (contravariant).
Consider the following example:
class AbsWrapperCov[+A]
case class Wrapper[B](x: Wrapped[B]) extends AbsWrapperCov[B]
def unwrap[T](x: AbsWrapperCov[T]): Wrapped[T] = x match {
case Wrapper(wrapped) =>
// Wrapper's type parameter must not be assumed to be equal to T,
// it's *upper-bounded* by it
wrapped // : Wrapped[_ <: T]
}
this method should type check if and only if Wrapped is covariant in its type
parameter
before inferring Wrapper's type parameter B from x's type AbsWrapperCov[T], we must
take into account that x's actual type is:
AbsWrapperCov[Tactual] forSome {type Tactual <: T}
since AbsWrapperCov is covariant in A -- in other words, we must not assume we know
T exactly, all we know is its upper bound
since method application is the only way to generate this slack between run-time and
compile-time types (TODO: right!?), we can simply replace skolems that represent
method type parameters as seen from the method's body by other skolems that are
(upper/lower)-bounded by that type-parameter skolem (depending on the variance
position of the skolem in the statically assumed type of the scrutinee, pt)
this type slack is introduced by adaptConstrPattern: before it calls
inferConstructorInstance, it creates a new context that holds the new existential
skolems
the context created by adaptConstrPattern must not be a CaseDef, since that
confuses instantiateTypeVar and the whole pushTypeBounds/restoreTypeBounds dance
(CaseDef contexts remember the bounds of the type params that we clobbered
during GADT typing)
typedCase deskolemizes the existential skolems back to the method skolems,
since they don't serve any further purpose (except confusing the old pattern
matcher)
typedCase is now better at finding that context (using nextEnclosing)
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fixed concurrent.impl.Promise by making FState invariant
(it would be unsound to make it covariant)
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Closes SI-3275, SI-5455.
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Phantom types were vanishing during the erasure which takes
place from manifest -> class object -> tpe.
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This should exclude everything mutable. I'm open to suggestions
as to what sort of final fields we can safely allow beyond these,
if any.
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References SI-3569. Probably needs refinement.
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