| Commit message (Collapse) | Author | Age | Files | Lines |
|---|
| |\
| |
| | |
Favour module accessors symbols in rebind
|
| | |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| | |
The Refchecks tree transformer transforms a nested modules that
overrides a method into a pair of symbols: the module itself, and
an module accessor that matches the overridden symbol.
[[syntax trees at end of typer]] // test1.scala
package <empty> {
abstract trait C2 extends scala.AnyRef {
def O1: Any
};
class C1 extends AnyRef with C2 {
object O1 extends scala.AnyRef
}
}
[[syntax trees at end of refchecks]] // test1.scala
package <empty> {
abstract trait C2 extends scala.AnyRef {
def O1: Any
};
class C1 extends AnyRef with C2 {
object O1 extends scala.AnyRef
@volatile <synthetic> private[this] var O1$module: C1.this.O1.type = _;
<stable> def O1: C1.this.O1.type = {
C1.this.O1$module = new C1.this.O1.type();
C1.this.O1$module
}
}
}
When constructing a TypeRef or SingleType with a prefix and and a symbol,
the factory methods internally use `rebind` to see if the provided symbol
should be replaced with an overriding symbol that is available in that prefix.
Trying this out in the REPL is a bit misleading, because even if you change
phase to `refchecks`, you won't get the desired results because the transform
is not done in an InfoTransformer.
scala> val O1 = typeOf[C1].decl(TermName("O1"))
O1: $r.intp.global.Symbol = object O1
scala> typeRef(typeOf[C2], O1, Nil)
res13: $r.intp.global.Type = C2#O1
scala> res13.asInstanceOf[TypeRef].sym.owner
res14: $r.intp.global.Symbol = class C1
But debugging the test case, we get into `rebind` during an AsSeenFrom
which is where we crashed when `suchThat` encountered the overloaded
module and module accessor symbols:
typeOf[OuterObject.Inner.type].memberType(symbolOf[InnerTrait.Collection])
...
singleTypeAsSeen(OuterTrait.this.Inner.type)
val SingleType(pre, sym) = tp
// pre = OuterTrait.this.type
// sym = OuterTrait.Inner
val pre1 = this(pre) // OuterObject.type
singleType(pre1, sym)
rebind(pre1, sym) // was crashing, now OuterObject.Inner
}
This commit excludes the module symbol from symbol lookup in the prefix in rebind.
|
| |\ \
| | |
| | | |
SI-6840 fixes weird typing of quasiquote arguments
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Previously quasiquote arguments were type checked against Any
which caused weird inference that made splicing of complex expressions
unusable:
val l1 = List(q"foo")
val l2 = List(q"bar")
q"f(..${l1 ++ l2})" // argument type checked as Any instead of List[Tree]
This is fixed by forcing compiler to type check against type
variable which itself isn't used in any other way.
|
| |\ \ \
| |_|/
|/| | |
fixes handling of fancy nested classes in runtime reflection
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Replaces the `jclazz.isMemberClass` check for whether we have an
inner/nested class with `jclazz.getEnclosingClass != null`, because there
exist classes produced by javac (see the attached jar file and the test log)
which have the following properties:
* They are nested within a parent class
* getEnclosingClass returns a non-null value
* isMemberClass returns false
Previously such classes were incorrectly treated as non-nested, were
incorrectly put into an enclosing package rather than an enclosing class,
and had their names trimmed in the process, leading to situations when
a package has multiple declarations with the same name. This is now fixed.
When changing the check, we need to be careful with interpretation of
what Class.getEnclosingXXX methods return. If getEnclosingClass produces
a non-null result, this doesn't mean that the class is inner or nested,
because getEnclosingClass is also not null for local classes (the ones
with getEnclosingMethod != null || getEnclosingConstructor != null).
This is expressed in the order of pattern match clauses in `sOwner`.
Now when the bug is fixed, I also revert b18a2f8798b2, restoring a very
important integrity check in runtime reflection, which I had to disable
a couple hours ago to fix a master breakage. More details at scala-internals:
https://groups.google.com/forum/#!topic/scala-internals/hcnUFk75MgQ
|
| |\ \ \
| |_|/
|/| | |
deprecates raw tree manipulation facilities in macros.Context
|
| | | | |
|
| |\ \ \
| |_|/
|/| | |
Add support for packages into quasiquotes and toolbox, improve handling of fresh names, unhardcode quasiquote expansion logic
|
| | | |
| | |
| | |
| | |
| | | |
This should ensure that concurrent access to the
fresh name creator is properly synchronized.
|
| | | | |
|
| | | | |
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
This commit extracts out freshTermName and freshTypeName to the top-level
with implicit fresh name creator argument. This will let to refactor out
more methods out of tree builder into treegen that are dependent on fresh
name generator. We also save quite a bit of boilerplate by not having to
redefined fresh functions all over the place.
|
| | | | |
|
| | | |
| | |
| | |
| | | |
For sake of consistency with noSelfType.
|
| | | | |
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
During parsing some names are generated artificially using freshTermName & freshTypeName (e.g. `x$1`). Such names should be reified in a different way because they are assumed to be always fresh and non-overlapping with the environment. So `x$1` should reify down to equivalent of `freshTermName("x$")` rather than `TermName("x$1")`.
But this is not enough. One name can be used more than once in a tree. E.g. `q"_ + 1"` desugars into `q"x$1 => x$1 + 1"`. So we need to ensure that every place where `x$1` is used gets the same fresh name. Hence the need for `withFreshTermName` that lets q"_ + 1" quasiquote desugare into equivalent of `withFreshTermName("x$") { freshx => q"$freshx => $freshx + 1" }`.
For pattern quasiquotes it's a bit different. Due to the fact that end-result must be a pattern we need to represent fresh names as patterns too. A natural way to express that something is fresh is to represent it as a free variable (e.g. any name will do in that place). But due to possible use of the same name in multiple places we need to make sure that all such places have the same values by adding a sequence of guards to the pattern.
Previously such names were reified naively and it could have caused name collision problems and inability to properly much on trees that contain such names.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | | |
Previously due to limited support for expansion in apply position
quasiquotes had to use a compiler hook for deconstruction. Now with
recent changes in pattern matcher it's possible to remove that special
case.
|
| | | |
| | |
| | |
| | |
| | |
| | | |
In order to implement this a new parser entry point
`parseStatsOrPackages` that augments current parseStats with ability
to parse "package name { ... }" syntax.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Recent runtime reflection sync pull request, which among other things,
introduced more restricted package completion rules, led to a nightmarish
regression on java7, which prevented the entire scalac from starting up.
This commit temporarily disables the introduced assert in order to hotfix
runtime reflection. In the hours to come I'll be looking into the root of
the problem, preparing a pull request that reinstates the assert, which
indicates a bug in our code that's been there since 2.10.0-M3, and fixes
the said bug.
Details: https://groups.google.com/forum/#!topic/scala-internals/hcnUFk75MgQ
|
| | | |
| | |
| | |
| | | |
https://github.com/scala/scala/pull/3029
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
We do need lazy to be robust, because initialization sequence might
trigger synced operations in unexpected order, leading to NPE's.
Even if this is optimizable by removing some of the lazies or by
carefully reordering cake layers, there's no guarantee that all this
effort won't break after another reflection refactoring.
|
| | | |
| | |
| | |
| | | |
Fixes this glaring omission of synchronization for a core part of Symbol.info.
|
| | | |
| | |
| | |
| | | |
This is another optimization we discussed with Roland.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
This is one of the changes suggested by Roland in order to reduce contention
caused by reflection GIL.
Locks optimized away here are indirectly used for such fundamental operations
as subtyping tests, so the optimization looks quite important.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
In the current synchronization scheme multiple threads can enter the
missingHook trying to materialize a package, which hasn't been created.
That's fine, because makeScalaPackage, which creates and enters package
symbols is synchronized and checks whether the creation is necessary
before commencing. Therefore even if makeScalaPackage is called multiple
times in rapid succession, the calls will be serialized and all calls
except the first one won't do anything.
|
| | | |
| | |
| | |
| | |
| | | |
Called from isVolatile, which is called from isStable, which is a part
of the public reflection API.
|
| | | |
| | |
| | |
| | |
| | |
| | | |
selfType joins the happy family of flags, annotations and privateWithin,
which automatically trigger initialization, when used within runtime
reflection.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
First of all, GIL should only apply to runtime reflection, because noone
is going to run toolboxes in multiple threads: a) that's impossible, b/c
the compiler isn't thread safe, b) ToolBox api prevents that.
Secondly, the only things in symbols which require synchronization are:
1) info/validTo (completers aren't thread-safe),
2) rawInfo and its dependencies (it shares a mutable field with info)
3) non-trivial caches like in typeAsMemberOfLock
If you think about it, other things like sourceModule or associatedFile
don't need synchronization, because they are either set up when a symbol
is created or cloned or when it's completed. The former is obviously safe,
while the latter is safe as well, because before acquiring init-dependent
state of symbols, the compiler calls `initialize`, which is synchronized.
We can say that symbols can be in four possible states: 1) being created,
2) created, but not yet initialized, 3) initializing, 4) initialized.
Of those only #3 is dangerous and needs protection, which is what this
commit does.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | | |
On a serious note, I feel really uncomfortable about having to juggle
this slew of locks. Despite that I can't immediately find a deadlock,
I'm 100% sure there is one hiding in the shadows. Hence, I'm abandoning
all runtime reflection locks in favor of a single per-universe one.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
The code to do so is curated with the help of a generator. Because this
needs to inspect code post-typer, the code generator is run during partest
as a code-validator. We could concievably do the same with a macro, but
this approach might be a better starting point which macros continue to
stabilize.
Removes Definitions.AnyRefModule and an already deprecated alias, as
these have been throwing exceptions for more than a year since 6bb5975289.
They used to be used by AnyRef specialization.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
At first I just tried to remove syntheticCoreClasses from missingHook
and put them into the initializer of freshly created mirrors in order to
reduce the non-determinism in mutations of the global symbol table.
And then it didn't work, crashing on me claiming that AnyRef is missing.
Apparently we still need AnyRefClass in missingHook, just because it's
impossible to initialize (i.e. unpickle) ScalaPackageClass without it.
And then it still didn't work, whining about multiple overloaded defs
of some synthetic symbols. That was really tricky, but I figured it out
as well by initializing ScalaPackageClass first before forcing any
synthetic symbols (see the details in comments).
And then it worked, but stopped working half a year later when
Jason and I came to revisit this old pull request. The final twist
was pre-initializing ObjectClass, because it's a dependency of AnyRefClass,
which is a critical dependency of ScalaPackageClass (full information
can be found in comments).
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Mentioned methods mutate the global `atPhaseStack` variable, which can
easily lead to imbalances and, ultimately, to the empty stack error.
Luckily for us, there's only one dummy phase, SomePhase, which is used
by runtime reflection, so there is absolutely zero need to invoke atPhase
in non-compiler reflexive universes.
The cleanest solution would be to override `atPhase` for runtime reflection,
but it's @inline final, so I didn't want to pay performance penalties for
something that's used three times in runtime reflection (during unpickling, in
reflection-specific completers and in `Symbol.typeParams/unsafeTypeParams`).
Therefore I added overrideable analogues of `atPhase` and `atPhaseNotLaterThan`
which are called from the aforementioned code shared between the compiler and
runtime reflection. I also had to duplicate the code of `Symbol.XXXtypeParams`
(only in SynchronizedSymbols, not in normal Symbols) again due to those
methods being very performance-sensitive.
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Synchronization via decoration would be neat if it actually worked.
Unfortunately, root symbols never got decorated, therefore their children
also never got decorated and all the way down to the very turtles.
This commit fixes this sad issue by turning root symbols from objects
to lazy vals. Yes, this is going to induce a performance penalty, which
will hopefully not be high enough to invalidate this cornerstone of our
synchronization strategy.
Now when root symbols are lazy vals, they can be overridden in the runtime
reflexive universe and decorated with SynchronizedSymbol, which makes their
children sync and sound.
|
| | |/
|/|
| |
| |
| |
| |
| | |
Too bad I didn't notice that before. That will free up quite a bit of
memory, removing an extraneous field in every single Symbol, namely the:
private volatile Symbols.Symbol.SymbolKind$ SymbolKind$module
|
| |\ \
| | |
| | | |
Fix AsSeenFrom of ThisType from TypeVar prefix
|
| | | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | |
| | | |
Restores behaviour for the AsSeenFrom before the refactoring
in b457b6c477.
This commit uniformly considered that a `TypeVar` prefix should not
`matchesPrefixAndClass`; a condition that formerly was only applied
if the type being viewed was a `TypeRef`. This condition was
originally added in cc9e8eda3364d as a backstop for pos/t2797.scala.
This commit leaves that backstop in place where it was, although it
expresses it more directly by checking if `pre baseType clazz` is
`NoType`, which was the case that cropped up in SI-2797:
scala> type T = bc._1.type forSome { val bc: (AnyRef, AnyRef) }
warning: there were 1 feature warning(s); re-run with -feature for details
defined type alias T
scala> val et = typeOf[T].dealias.asInstanceOf[ExistentialType]
et: $r.intp.global.ExistentialType = bc._1.type forSome { val bc: (AnyRef, AnyRef) }
scala> et.withTypeVars( { x =>
| println(x.prefix.typeSymbol)
| println(x.prefix.typeSymbol.isSubClass(typeOf[Tuple2[_, _]].typeSymbol))
| println(x.prefix.baseType(typeOf[Tuple2[_, _]].typeSymbol))
| true
| } , reflect.internal.Depth(0))
type bc.type
true
<notype>
res98: Boolean = true
|
| |\ \ \
| | | |
| | | | |
Traverser and Pickler improvements.
|
| | | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | | |
This commit drops about 700 lines of redundant traversal logic.
There had been ad hoc adjustments to the pickling scheme here and
there, probably in pursuit of tiny performance improvements.
For instance, a Block was pickled expr/stats instead of stats/expr,
a TypeDef was pickled rhs/tparams instead of tparams/rhs.
The benefits derived are invisible compared to the cost of having
several hundred lines of tree traversal code duplicated in half a
dozen or more places.
After making Traverser consistent/complete, it was a straightforward
matter to use it for pickling. It is ALSO now possible to write a
vastly cleaner tree printer than the ones presently in trunk, but I
leave this as an exercise for Dear Reviewer.
|
| | | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | | |
There's a huge amount of tree traversal related duplication
which is hard to eliminate only because trees aren't properly
traversed. The not-quite-tree bits of key trees are ignored
during traversals, making it impossible to write e.g. a
pretty printer without duplicating almost the entire traversal
logic (as indeed is done for printing purposes in more than one
place.) And almost the entire pickler logic is redundant with
Traverser, except since it's all duplicated of course it diverged.
The pickler issue is remedied in the commit to follow.
The not-quite-trees not quite being traversed were Modifiers, Name,
ImportSelector, and Constant. Now every case field of every tree is
traversed, with classes which aren't trees traversed via the following
methods, default implementations as shown:
def traverseName(name: Name): Unit = ()
def traverseConstant(c: Constant): Unit = ()
def traverseImportSelector(sel: ImportSelector): Unit = ()
def traverseModifiers(mods: Modifiers): Unit = traverseAnnotations(mods.annotations)
|
| | | | |
| | | |
| | | |
| | | |
| | | |
| | | | |
This enables a measure of "command/query separation", which is
to say: the same method shouldn't go on a side effecting binge
and also return a value.
|
| | | | | |
|
| | | | | |
|
| |\ \ \ \
| |_|_|/
|/| | | |
[resubmit] Experimental Single Abstract Method support (sammy meets world)
|
| | |\| |
| | | |
| | | |
| | | |
| | | | |
Conflicts:
src/compiler/scala/tools/nsc/typechecker/Typers.scala
|
| | | | |
| | | |
| | | |
| | | | |
Addressing review feedback.
|
| | | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | | |
`synthesizeSAMFunction` will be used to expand the following tree:
```
{ (p1: T1, ..., pN: TN) => body } : S
```
to:
```
{
def apply$body(p1: T1, ..., pN: TN): T = body
new S { def apply(p1: T1, ..., pN: TN): T = apply$body(p1,..., pN) }
}
```
The expansion assumes `S` (the expected type) defines a single abstract method
(let's call that method `apply` for simplicity).
1. If 'T' is not fully defined, it is inferred by type checking
`def apply$body` without a result type before type checking the block.
The method's inferred result type is used instead of T`.
[See test/files/pos/sammy_poly.scala]
2. To more easily enforce S's members are not in scope in `body`, that tree
goes to the `apply$body` method that's outside the anonymous subclass of S.
(The separate `apply$body` method simplifies the implementation of 1&2.)
3. The following restrictions apply to S:
1. Its primary constructor (if any) must be public, no-args, not overloaded.
2. S must have exactly one abstract member, its SAM
3. SAM must take exactly one argument list
4. SAM must be monomorphic
We may later relax these requirements to allow an implicit argument list,
both on the constructor and the SAM. Could also let the SAM be polymorphic.
|
| | | | |
| | | |
| | | |
| | | |
| | | | |
When looking for deferred members, it only makes sense
to retry when deferred members aren't excluded.
|
| | |/ /
|/| |
| | |
| | |
| | |
| | | |
As long as it's a block of pure boilerplate we have to
navigate around all the time, it may as well be the most
beautiful boilerplate it knows how to be.
|
| |\ \ \
| | | |
| | | | |
SI-7902 Fix spurious kind error due to an unitialized symbol
|
