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* all usages of ClassManifest and Manifest are replaced with tags
* all manifest tests are replaced with tag tests
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* introduces ArrayTag and ErasureTag
* all type tags now feature erasure
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'refs/pull/421/head'; commit 'refs/pull/422/head' into develop
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- Consolidating many islands of name organization. Folds NameManglers
into StdNames. Brings more of the string constants together with similar
constants. Move name manipulation methods which produce TypeNames
into object tpnme rather than nme.
- Starting on MethodSymbolApi, ClassSymbolApi, etc so we can put
sensible methods on sensible entities. This pushed into Definitions,
where I pulled a whole bunch out of the api side (or at least marked
my intention to do so -- too many tests use them to make them easy to
remove) and on the compiler side, returned something more specific than
Symbol a bunch of places.
- Added a number of conveniences to Definitions to make it easier to
get properly typed symbols.
Note: one way in which you might notice having better typed Symbols is
with Sets, which have the annoying property of inferring a type based on
what they've been constructed with and then hard failing when you test
for the presence of a more general type. So this:
val mySet = Set(a, b)
println(mySet(c))
..goes from compiling to not compiling if a and b receive more specific
types (e.g. they are MethodSymbols) and c is a Symbol or ClassSymbol or
whatever. This is easily remedied on a site-by-site basis - create
Set[Symbol](...) not Set(...) - but is an interesting and unfortunate
consequence of type inference married to invariance.
The changes to DummyMirror where things became ??? were driven by the
need to lower its tax; type "Nothing" is a lot more forgiving about changes
than is any specific symbol type.
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'refs/pull/416/head'; commit 'refs/pull/417/head'; commit 'refs/pull/418/head' into develop
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I also tried transforming a comment into an assertion and to
my shock and happy surprise everything still worked. Let's
express those preconditions in code when we can, mmm?
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It depended on the signature of uncheckedWarnings.
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And we'll need a separate mechanism for making internal fields public.
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workaround for inliner bug in run/t3835
see SI-5672 for the optimizer bug
tiny switches (2 cases or less) don't make sense anyway,
so this is not a big deal
the annotDepMethType.flags contained -Xexperimental,
which causes Any* to be considered as a valid return type,
before we weren't exposed to this, because the product methods
used (tiny) switches; with this change, they went back to pattern matches
in any case, the -Xexperimental was intended to turn on dependent method types,
not Any* as valid type (I can only assume), and they are now on by default
the other tests were affected by our refusal to emit tiny switches
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detect partialfunction in cpsannotationchecker
emit apply/isDefinedAt if PF has @cps targs (applyOrElse can't be typed)
further hacky improvements to selective anf
better try/catch support in selective cps using freshly minted anonfun match
make virtpatmat resilient to scaladoc (after uncurry, don't translate matches
TODO: factor out translation all together so presentation compiler/scaladoc can skip it)
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Would prefer to bake a little longer, but, scala days.
More elaboration to come.
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'refs/pull/403/head'; commit 'refs/pull/404/head'; commit 'refs/pull/405/head' into develop
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of it.
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'refs/pull/392/head'; commit 'refs/pull/397/head' into develop
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and implicit pimped on members. Thanks to Lukas for pointing it out!
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Re-enable testing the sensibility of comparing instances
of two case classes. In particular, warn if we detect that
the two objects inherit from different case classes. In
addition, avoid emitting misleading warnings when comparing "new C".
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Made the primary constructors private to prevent them from appearing in ScalaDoc.
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some tests (unreachability, exhaustivity, @switch annotation checking) are still run under -Xoldpatmat,
but that will change before we go into RC mode (then the test/ partest of this commit will be reverted)
removed irrelevant dependency on patmat
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typers&patmatvirtualizer have ad-hoc support for dropping annotations
in a way that makes the CPS plugins happy... this is not ideal,
but unless virtpatmat runs after the plugin phases, I don't see how to solve it
running virtpatmat after the CPS plugin would mean the pattern matching evaluation
cannot be captured by CPS, so it's not even desirable to move it to a later phase
- typedIf must lub annotated types
- drop selector.tpe's annotations
- drop annots in matchEnd's argument type
- deal with annots in casts synth by in virtpatmat
(drop them from type arg to asInstanceof, recover them using type ascription)
- workaround skolemize existential dropping annots
CPS is the main reason why typedMatchAnonFun is not used anymore,
and PartialFunction synthesis is moved back to uncurry (which is quite painful due to labeldefs being so broken)
we can't synth partialfunction during typer since T @cps[U] does not conform to Any,
so we can't pass it as a type arg to PartialFunction, so we can't type a cps-transformed PF
after the CPS plugin, T @cps[U] becomes ControlContext[...], which is a type we can pass
to PartialFunction
virtpatmat is now also run until right before uncurry
(so, can't use isPastTyper, although it means more or less the same thing -- we don't run after uncurry)
the main functional improvements are in the selective ANF transform
its treatment of labeldefs was broken: for example,
LabelDef L1; LabelDef L2 --> DefDef L1; L1(); DefDef L2; L2()
but this does not take into account L1 may jump over L2 to another label
since methods always return (or fail), and the ANF transform generates ValDefs
to store the result of those method calls, both L1 and L2 would always be executed
(so you would run a match with N cases N times, with each partial run starting at a later case)
also fixed a couple of weird bugs in selective anf that caused matches to be duplicated
(with the duplicate being nested in the original)
since label defs are turned into method defs, and later defs
will be nested in the flatMap calls on the controlcontext
yielded by earlier statements, we reverse the list of method
definitions, so that earlier (in the control flow sense) methods
are visible in later ones
selective CPS now generates a catch that's directly digestible by backend
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since we can't statically know whether the unapply
we'll be bridging to is synthetic, drop this condition,
and do pessimistic bridging for all unapply[Seq]
(i.e., if we can't statically guarantee the type
that would be assumed to be safe to cast to by a synthetic
extractor, do the type test and return None if it fails)
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due to interaction with the CPS plugin, can't synth PartialFun during typer
(the types don't work out: in PartialFun[T, U @cps[V]], U @cps[V] does not conform to Any, and we can't move the annot from the type arg directly to applyOrElse's result,
since then it won't override anything)
thus, we face the pain of mangling labeldefs again
resetLocalAttrsKeepLabels can't use leaveAlone
don't cast matcherror throw, uncurry gets confused
uncurry: cast selector valdef's rhs to avoid skolem mismatch
NOTE: I'm not happy about this code, but I don't know
how to make the clean way (typedMatchAnonFun) compatible with the CPS plugin
one avenue to explor would be to introduce PartialFunCPS,
which is transformed into a regular PartialFun
when T @cps[U] is turned into ControlContext[T, U]
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for macros
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Take a 15-implicit load off Predef and put it where it belongs: on
those brave souls who like their longs to get floaty by way of T.
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Hey everyone, if classnames don't match filenames, ant will recompile
said file on every run until the end of time. Still here, ant is.
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