| Commit message (Collapse) | Author | Age | Files | Lines |
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The deprecated list is only emitted if there actually are deprecated
members; same for the link in the left sidebar.
We just build on the existing index support, with an additional method
to avoid having to go through the whole index if we won't generate the
page anyway. The deprecated list page itself is completely identical to
the normal index pages, except we don't strike through any entry (there
are *all* deprecated already).
There is just about enough space in the left sidebar for the deprecated
link, see [1], and [2] for when there are no deprecated members.
[1]: http://static.gourlaysama.net/img/scaladoc-deprecated.png
[2]: http://static.gourlaysama.net/img/scaladoc-deprecated-empty.png
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SI-9268 Be robust against absent classfiles during signature parsing
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When parsing a Java generic signature that references an inner
class `A$B`, we were tripping an assertion if the enclosing class
`A` was absent.
This commit creates a stub symbol for `B` when this happens, rather
than continuing on with `NoSymbol`.
The enclosed test shows that we can instantiate a class containing
a method referring to such an inner class with only a warning
about the absent classfile, and that an error is issued only upon
a subsequent attempt to call the method.
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Fix typo in Quasiquote doc that was confusing
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Remove the akka-actors dependency
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The 2.12 distribution will no longer ship an akka-actors jar.
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Update versions.properites
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The tagged revisions of the modules integrate the latest release of
the sbt-scala-modules sbt plugin. This enables building with a new
scala binary version (e.g. 2.12.0-M1) without failinig MiMa.
Also updates the other external dependencies.
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Prepare for the 2.12.0-M1 release
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SI-8627 Two-argument indexOf does not work for Iterator
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Adds two new methods to `Iterator`, overloading `indexOf` and `indexWhere` with a two-arg version whose second argument indicates the index where to start the search. These methods were already present in instances of `GenSeqLike` but not on iterators, leading to strange behavior when two arguments were passed to `indexOf`.
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Merge 2.11 to 2.12
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Make lambda body public rather than using static accessor
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Under -Ydelambdafy:method (the basis of the upcoming "indylambda"
translation for -target:jvm-1.8), an anonymous function is currently
encoded as:
1. a private method containing the lambda's code
2. a public, static accessor method that allows access to 1 from
other classes, namely:
3. an anonymous class capturing free variables and implementing
the suitable FunctionN interface.
In our prototypes of indylambda, we do away with 3, instead deferring
creating of this class to JDK8's LambdaMetafactory by way of an
invokedynamic instruction at the point of lambda capture. This
facility can use a private method as the lambda target; access is
mediated by the runtime-provided instance of
`java.lang.invoke.MethodHandles.Lookup` that confers the privelages
of the lambda capture call site to the generated implementation class.
Indeed, The java compiler uses this to emit private lambda body
methods.
However, there are two Scala specific factors that make this
a little troublesome.
First, Scala's optimizer may want to inline the lambda capture
call site into a new enclosing class. In general, this isn't a
safe optimization, as `invokedynamic` instructions have call-site
specific semantics. But we will rely the ability to inline like
this in order to eliminate closures altogether where possible.
Second, to support lambda deserialization, the Java compiler creates
a synthetic method `$dersializeLamda$` in each class that captures
them, just to be able to get the suitable access to spin up an
anoymous class with access to the private method. It only needs
to do this for functional interfaces that extends Serializable,
which is the exception rather than the rule. But in Scala, *every*
function must support serialization, so blindly copying the Java
approach will lead to some code bloat.
I have prototyped a hybrid approach to these challenges: use the
private method directly where it is allowed, but fall back to
using the accessor method in a generic lambda deserializer or
in call sites that have been inlined into a new enclosing class.
However, the most straight forward approach is to simply emit the
lambda bodies as public (with an mangled name and with the SYHTNETIC
flag) and use them in all cases. That is what is done in this commit.
This does moves us one step backwards from the goals of SI-7085,
but it doesn't seem sensible to incur the inconvenience from locking
down one small part of our house when we don't have a plan or the
budget to complete that job.
The REPL has some fancy logic to decompile the bodys of lambdas
(`:javap -fun C#m`) which needed tweaking to accomodate this change.
I haven't tried to make this backwards compatible with the old
encoding as `-Ydelambdafy:method` is still experimental.
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SI-3368 Default to coalescing for 2.11
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Preserve current behavior (no PCData nodes, only Text)
for 2.11.
The coalescing flag is on if enabled or if source level
is not 2.12 and no flag was supplied.
The subtle change is that adjacent Text nodes are thereby
coalesced. This happens in the presence of CData sections,
but this is at the discretion of the parser anyway.
Also, no PCData nodes are emitted under coalescing, even
if there were no sibling text nodes. That is the correct
behavior: the general idea is that coalescing mode says,
I only want to deal with text.
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Derive repository info from (jenkins) env vars
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Since we're moving to bintray, first centralizing the config of
the repositories we use while bootstrapping a release.
This should not be hardcoded in scala/scala anyway, it's an
implementation detail of our infrastructure, which is defined by
scala/scala-jenkins-infra.
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SI-9273 Avoid unpositioned error for bare classOf
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A bare identifier `classOf` in a position wth an expected type of
`Class[_]` was leading to an unpositioned error.
This is due to special treatment of bare `classOf` in `typedIdent`
creating an ephemeral, but unpositioned, `TypeTree`.
This commit positions that tree and tests that the error is
issued at a sensible position.
There is still an irregularity between `classOf` and `Predef.classOf`,
but that seems esoteric enough to leave alone for now.
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Disable -Ydelambdafy:method for specialized FunctionN
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The Delambdafy phase generates its `FunctionN` subclasses after
the specialization phase. As such, `((x: Int) => x).apply(42)` incurs
boxing.
This commit falls back to the `-Ydelambdafy:inline` in this case.
This is done by running the specialization type map over the
type of the function, and seeing if anything changes. To make this
work robustly, we first need to ensure that the specialization info
transformer has processed all the function types.
This is not a fundamental limitation; we could in principle generate
the specialized code.
A followup change will use `-Ydelambdafy:method` as the basis for
invokedymnamic lambdas. As part of that stream of
work, we will synthesize specialization-aware lambdas, and remove
the fallback to `-Ydelambdafy:inline`.
I have updated some tests that intend to test the delambdafy transform
to avoid use of specialized function types.
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Patmat: efficient reasoning about mutual exclusion
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Faster analysis of wide (but relatively flat) class hierarchies
by using a more efficient encoding of mutual exclusion.
The old CNF encoding for mutually exclusive symbols of a domain
added a quadratic number of clauses to the formula to satisfy.
E.g. if a domain has the symbols `a`, `b` and `c` then
the clauses
```
!a \/ !b /\
!a \/ !c /\
!b \/ !c
```
were added.
The first line prevents that `a` and `b` are both true at the same time, etc.
There's a simple, more efficient encoding that can be used instead: consider a
comparator circuit in hardware, that checks that out of `n` signals, at most 1
is true. Such a circuit can be built in the form of a sequential counter and
thus requires only 3n-4 additional clauses [1]. A comprehensible comparison of
different encodings can be found in [2].
[1]: http://www.carstensinz.de/papers/CP-2005.pdf
[2]: http://www.wv.inf.tu-dresden.de/Publications/2013/report-13-04.pdf
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SI-8359 Adjust parameter order of accessor method in Delambdafy
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Under `-Ydelambdafy:method`, a public, static accessor method is
created to expose the private method containing the body of the
lambda.
Currently this accessor method has its parameters in the same order
structure as those of the lambda body method.
What is this order? There are three categories of parameters:
1. lambda parameters
2. captured parameters (added by lambdalift)
3. self parameters (added to lambda bodies that end up in trait
impl classes by mixin, and added unconditionally to the static
accessor method.)
These are currently emitted in order #3, #1, #2.
Here are examples of the current behaviour:
BEFORE (trait):
```
% cat sandbox/test.scala && scalac-hash v2.11.5 -Ydelambdafy:method sandbox/test.scala && javap -private -classpath . 'Test$class'
trait Member; class Capture; trait LambdaParam
trait Test {
def member: Member
def foo {
val local = new Capture
(arg: LambdaParam) => "" + arg + member + local
}
}
Compiled from "test.scala"
public abstract class Test$class {
public static void foo(Test);
private static final java.lang.String $anonfun$1(Test, LambdaParam, Capture);
public static void $init$(Test);
public static final java.lang.String accessor$1(Test, LambdaParam, Capture);
}
```
BEFORE (class):
```
% cat sandbox/test.scala && scalac-hash v2.11.5 -Ydelambdafy:method sandbox/test.scala && javap -private -classpath . Test
trait Member; class Capture; trait LambdaParam
abstract class Test {
def member: Member
def foo {
val local = new Capture
(arg: LambdaParam) => "" + arg + member + local
}
}
Compiled from "test.scala"
public abstract class Test {
public abstract Member member();
public void foo();
private final java.lang.String $anonfun$1(LambdaParam, Capture);
public Test();
public static final java.lang.String accessor$1(Test, LambdaParam, Capture);
}
```
Contrasting the class case with Java:
```
% cat sandbox/Test.java && javac -d . sandbox/Test.java && javap -private -classpath . Test
public abstract class Test {
public static class Member {};
public static class Capture {};
public static class LambaParam {};
public static interface I {
public abstract Object c(LambaParam arg);
}
public abstract Member member();
public void test() {
Capture local = new Capture();
I i1 = (LambaParam arg) -> "" + member() + local;
}
}
Compiled from "Test.java"
public abstract class Test {
public Test();
public abstract Test$Member member();
public void test();
private java.lang.Object lambda$test$0(Test$Capture, Test$LambaParam);
}
```
We can see that in Java 8 lambda parameters come after captures. If we
want to use Java's LambdaMetafactory to spin up our anoymous FunctionN
subclasses on the fly, our ordering must change.
I can see three options for change:
1. Adjust `LambdaLift` to always prepend captured parameters,
rather than appending them. I think we could leave `Mixin` as
it is, it already prepends the self parameter. This would result
a parameter ordering, in terms of the list above: #3, #2, #1.
2. More conservatively, do this just for methods known to hold
lambda bodies. This might avoid needlessly breaking code that
has come to depend on our binary encoding.
3. Adjust the parameters of the accessor method only. The body
of this method can permute params before calling the lambda
body method.
This commit implements option #2.
In also prototyped #1, and found it worked so long as I limited it to
non-constructors, to sidestep the need to make corresponding
changes elsewhere in the compiler to avoid the crasher shown
in the enclosed test case, which was minimized from a bootstrap
failure from an earlier a version of this patch.
We would need to defer option #1 to 2.12 in any case, as some of
these lifted methods are publicied by the optimizer, and we must
leave the signatures alone to comply with MiMa.
I've included a test that shows this in all in action. However, that
is currently disabled, as we don't have a partest category for tests
that require Java 8.
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SI-3368 CDATA gets a Node
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Verbose option help and test tweak.
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As long as Scala does XML literals, there is probably parsing
behavior worth configuring.
Therefore, the umbrella option is promoted to `-Xxml`.
It was tempting to make it `-XML`, but we resisted.
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Update the test slightly to use the rig it inspired.
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XML Parser uses `scala.xml.PCData`.
A compiler flag `-Yxml:coalescing`, analogous to
`DocumentBuilderFactory.setCoalescing`, turns `PCData`
nodes into `Text` nodes and coalesces sibling text nodes.
This change also fixes parse errors such as rejecting a
sequence of CDATA sections.
A sequence of "top level" nodes are not coalesced.
```
scala> <a><b/>start<![CDATA[hi & bye]]><c/>world<d/>stuff<![CDATA[red & black]]></a>
res0: scala.xml.Elem = <a><b/>start<![CDATA[hi & bye]]><c/>world<d/>stuff<![CDATA[red & black]]></a>
scala> :replay -Yxml:coalescing
Replaying: <a><b/>start<![CDATA[hi & bye]]><c/>world<d/>stuff<![CDATA[red & black]]></a>
res0: scala.xml.Elem = <a><b/>starthi & bye<c/>world<d/>stuffred & black</a>
```
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SI-9239 fix java generic signature when traits extend classes
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Given the following code:
class C1[T]
trait T1[T] extends C1[T]
class C2[T] extends T1[T]
The generic signature of C2 changed after ced3ca8 from "C1[T], T1[T]"
to "Object, T1[T]", even though C1 was still marked as a superclass in
the bytecode...
C1 was removed because a subclass (T1) appeared later on, and it was
possible for a trait to cause a class to be evicted. It turns out that
if a class A appears in "parents", it *always* has to stay in the
signature: if a trait later in the list inherits from some class, that
class has to be a superclass of A (per SLS §5.1), or A itself, so in
any case, the most specific superclass is A, so A should stay in the
signature.
Thus minimizeParents now only allows traits/interfaces to be removed
from the list (the refactoring in 7552739, moving from mixinClasses to
parents, makes this much easier to fix).
This didn't happen for non-generic signatures because there are two
separate fields in the classfile for this (one for the superclass,
one for interfaces), so interfaces were processed on their own.
Thus non-parametrized classes were not affected. Anything that used
erased types at runtime was also fine (like isInstanceOf checks),
and anything that used ScalaSignature was also unaffected.
Maybethat's why so few things broke...
See the test for how this affects Java (hint: badly).
This changes very few things when building scala itself, and the
changes seem sensible:
--- sandbox/lib/scala-library.jar#!scala/runtime/NonLocalReturnControl.class
+++ build/pack/lib/scala-library.jar#!scala/runtime/NonLocalReturnControl.class
- Generic Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lscala/util/control/ControlThrowable;
+ Generic Signature: <T:Ljava/lang/Object;>Ljava/lang/Throwable;Lscala/util/control/ControlThrowable;
--- sandbox/lib/scala-library.jar#!scala/collection/mutable/QueueProxy$$anon$1.class
+++ build/pack/lib/scala-library.jar#!scala/collection/mutable/QueueProxy$$anon$1.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/mutable/QueueProxy<TA;>;
+ Generic Signature: Lscala/collection/mutable/Queue<TA;>;Lscala/collection/mutable/QueueProxy<TA;>;
--- sandbox/lib/scala-library.jar#!scala/collection/mutable/Iterable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/mutable/Iterable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/mutable/Iterable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/mutable/Iterable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/mutable/Iterable;>;
--- sandbox/lib/scala-library.jar#!scala/collection/immutable/Traversable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/immutable/Traversable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/immutable/Traversable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/immutable/Traversable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/immutable/Traversable;>;
--- sandbox/lib/scala-library.jar#!scala/collection/immutable/Iterable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/immutable/Iterable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/immutable/Iterable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/immutable/Iterable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/immutable/Iterable;>;
--- sandbox/lib/scala-library.jar#!scala/collection/mutable/Traversable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/mutable/Traversable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/mutable/Traversable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/mutable/Traversable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/mutable/Traversable;>;
--- sandbox/lib/scala-library.jar#!scala/throws.class
+++ build/pack/lib/scala-library.jar#!scala/throws.class
- Generic Signature: <T:Ljava/lang/Throwable;>Ljava/lang/Object;Lscala/annotation/StaticAnnotation;
+ Generic Signature: <T:Ljava/lang/Throwable;>Lscala/annotation/Annotation;Lscala/annotation/StaticAnnotation;
--- sandbox/lib/scala-library.jar#!scala/collection/mutable/StackProxy$$anon$1.class
+++ build/pack/lib/scala-library.jar#!scala/collection/mutable/StackProxy$$anon$1.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/mutable/StackProxy<TA;>;
+ Generic Signature: Lscala/collection/mutable/Stack<TA;>;Lscala/collection/mutable/StackProxy<TA;>;
--- sandbox/lib/scala-library.jar#!scala/collection/convert/Wrappers$IterableWrapper.class
+++ build/pack/lib/scala-library.jar#!scala/collection/convert/Wrappers$IterableWrapper.class
- Generic Signature: <A:Ljava/lang/Object;>Ljava/lang/Object;Lscala/collection/convert/Wrappers$IterableWrapperTrait<TA;>;Lscala/Product;Lscala/Serializable;
+ Generic Signature: <A:Ljava/lang/Object;>Ljava/util/AbstractCollection<TA;>;Lscala/collection/convert/Wrappers$IterableWrapperTrait<TA;>;Lscala/Product;Lscala/Serializable;
--- sandbox/lib/scala-library.jar#!scala/collection/Iterable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/Iterable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/Iterable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/Iterable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/Iterable;>;
--- sandbox/lib/scala-library.jar#!scala/collection/Traversable$.class
+++ build/pack/lib/scala-library.jar#!scala/collection/Traversable$.class
- Generic Signature: Ljava/lang/Object;Lscala/collection/generic/TraversableFactory<Lscala/collection/Traversable;>;
+ Generic Signature: Lscala/collection/generic/GenTraversableFactory<Lscala/collection/Traversable;>;Lscala/collection/generic/TraversableFactory<Lscala/collection/Traversable;>;
--- sandbox/lib/scala-library.jar#!scala/collection/parallel/AdaptiveWorkStealingForkJoinTasks$WrappedTask.class
+++ build/pack/lib/scala-library.jar#!scala/collection/parallel/AdaptiveWorkStealingForkJoinTasks$WrappedTask.class
- Generic Signature: <R:Ljava/lang/Object;Tp:Ljava/lang/Object;>Ljava/lang/Object;Lscala/collection/parallel/ForkJoinTasks$WrappedTask<TR;TTp;>;Lscala/collection/parallel/AdaptiveWorkStealingTasks$WrappedTask<TR;TTp;>;
+ Generic Signature: <R:Ljava/lang/Object;Tp:Ljava/lang/Object;>Lscala/concurrent/forkjoin/RecursiveAction;Lscala/collection/parallel/ForkJoinTasks$WrappedTask<TR;TTp;>;Lscala/collection/parallel/AdaptiveWorkStealingTasks$WrappedTask<TR;TTp;>;
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SI-7741: Be more tolerant of absent inner classfiles and non-Scala interface members
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1. Avoid forcing info of non-Scala interface members
This avoids parsing the ostensibly malformed class definitions that
correspond to a Groovy lambda defined in an interface.
2. Be more tolerant of absent inner classfiles
Taking a leaf out of javac's book (see transcript below),
we can use stub symbols for InnerClass entries that don't
have corresponding class files on the compilation classpath.
This will limit failures to code that directly refers to the
inner class, rather than any code that simply refers to the
enclosing class.
It seems that groovyc has a habit of emitting incongrous
bytecode in this regard. But this change seems generally
useful.
```
% cat sandbox/{Test,Client}.java
public class Test {
public class Inner {}
}
public class Client {
public Test.Inner x() { return null; }
}
% javac -d . sandbox/Test.java && javac -classpath . sandbox/Client.java
% javac -d . sandbox/Test.java && rm 'Test$Inner.class' && javac -classpath . sandbox/Client.java
sandbox/Client.java:2: error: cannot access Inner
public Test.Inner x() { return null; }
^
class file for Test$Inner not found
1 error
% cat sandbox/{Test,Client}.java
public class Test {
public class Inner {}
}
public class Client {
public Test.NeverExisted x() { return null; }
}
% javac -classpath . sandbox/Client.java
sandbox/Client.java:2: error: cannot find symbol
public Test.NeverExisted x() { return null; }
^
symbol: class NeverExisted
location: class Test
1 error
% cat sandbox/{Test,Client}.java
public class Test {
public class Inner {}
}
public class Client {
public Test x() { return null; }
}
topic/groovy-interop ~/code/scala2 javac -d . sandbox/Test.java && rm 'Test$Inner.class' && javac -classpath . sandbox/Client.java # allowed
```
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[nomerge] SI-7601 Scaladoc: img elements must have an "alt" attribute
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This change makes Scaladoc's HTML valid a bit.
Backport of #4407 to 2.11.x
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SI-5795 empty scaladoc tags should be omitted from output
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Empty scaladoc tags, like `@param`, `@return`, `@version`, etc. should
be omitted from the output when they have no meaning by themselves.
They are still parsed, for validation (warning that a tag doesn't
exist and so on), but are removed, if empty, when building the Comment.
The only ones that stay even when empty are `@deprecated`, so that the
class name can be striked-through ("Deprecated" also appears in the
header, even if there is no message with it), and `@throws`.
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