| Commit message (Collapse) | Author | Age | Files | Lines |
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as errors. Fixed erasure scheme.
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new STARR!
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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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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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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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- 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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'hubertp/issue/5553' into develop
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Since there is no useful information in such a message.
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An object in a pattern should have type "Foo.type" just as
objects not in patterns do. Closes SI-5406. Review by @moors.
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Hacked filename into message to alleviate meaningless
"_$1 defined twice" error condition. References SI-4893.
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'namin/add-test-for-parent-inherited-twice-error', 'namin/add-test-for-constructor-prefix-error', 'namin/add-tests-for-qualifying-class-error', 'namin/add-test-for-abstraction-from-volatile-type-error' and 'axel22/issue/5293' into develop
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A method with return type Nothing elides into a call to ??? .
It's the role ??? was born for.
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Found a better elidable implementation which is robust against other
parts of the compiler doing their things. Calls to elidable methods are
replaced with zero of the same type. Elidable methods themselves remain
in place, but with their body replaced with a zero of the method return
type.
Thus is everything to be found where it is expected to be found, but
nothing will be found where nothing ought to be found. Nothing of course
will never be found.
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On epfl jenkins, elidable.scala fails with:
[partest] java.lang.VerifyError: (class: Test$, method: main signature: ([Ljava/lang/String;)V) Unable to pop operand off an empty stack
[partest]
[partest] at Test.main(elidable.scala)
Strangely it is fine for me on OSX with either apple's jvm or openjdk.
Since tests were not running for a while I don't know which of the recent
elidable commits is responsible, so given present time demands all I
can do is revert them all.
Revert "Fix for SI-5215: scalac crash when @elidable used in trait"
This reverts commit 5e52ce9a13f12ef159e25ac80c6be2803ec48950.
Revert "Fix for SI-5215 part 2: generate return value when eliding method calls"
This reverts commit 61c9b4f01d99a81e15391b270bd1b5a895f65ffd.
Revert "Eliminating duplication in zero creation."
This reverts commit fbb7865e137e83660257fdc79d19d29ff39c775b.
Revert "Disallow eliding when Nothing is expected"
This reverts commit f26a47c4e8bda2f6c689b4e9b0bb5c64ccf4c699.
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'szabolcsberecz/SI-5316' and 'szabolcsberecz/SI-5171' into develop
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Compiler NPE on 2.9.1 when implicit parameter not found
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