| Commit message (Collapse) | Author | Age | Files | Lines |
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This commit shortens expressions of the form `if (settings.debug.value)` to
`if (settings.debug)` for various settings. Rarely, the setting is supplied
as a method argument. The conversion is not employed in simple definitions
where the Boolean type would have to be specified.
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This allows a more compact expression `if (settings.debug)` instead of
`if (settings.debug.value)` and similarly `render(..., printIds = settings.uniqid, ...)`.
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SI-6168 Retain prefix when parsing types in JVM signatures
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When reading Java classfiles, the generic signatures are
used to construct the corresponding Scala type signatures.
In the enclosed test case, the field `SomeClass.f` had
the JVM signature:
LContext<LSomeClass;>.Field<Ljava.lang.Integer;>;
The parser first (correctly) parsed the prefix as `Context[SomeClass]`.
It then looked up the type symbol for `Field` in that that type. It then
discarded the parsed prefix, and instead used the prefix from the
info of the type symbol: `Context[ParentType]`.
This commit changes the signature parser after the first `.` to
use the result of prior parsing as the prefix.
I've also included a test case with Java static inner classes,
which don't require any special treatment.
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topic/merge-2.10.x-to-v2.11.0-M2-74-g00e6c8b
Conflicts:
bincompat-backward.whitelist.conf
bincompat-forward.whitelist.conf
build.xml
src/compiler/scala/reflect/reify/utils/Extractors.scala
src/compiler/scala/tools/nsc/backend/jvm/GenJVM.scala
src/compiler/scala/tools/nsc/symtab/classfile/ICodeReader.scala
src/compiler/scala/tools/nsc/transform/patmat/MatchOptimization.scala
src/compiler/scala/tools/nsc/typechecker/Typers.scala
src/partest/scala/tools/partest/nest/ReflectiveRunner.scala
src/reflect/scala/reflect/internal/Types.scala
src/reflect/scala/reflect/runtime/JavaUniverse.scala
test/files/run/inline-ex-handlers.check
test/files/run/t6223.check
test/files/run/t6223.scala
test/scaladoc/scalacheck/IndexTest.scala
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Scaladoc: Load scripts at the bottom, and with a defer attribute
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To improve latency on modern browsers (which supports defer) and old browsers:
* https://www.webkit.org/blog/1395/running-scripts-in-webkit/
* http://developer.yahoo.com/blogs/ydn/posts/2007/07/high_performanc_5/
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We now use the unified diff format, hence the updated check files.
It's not clear to me how partest's classpath is managed,
but the approach in this commit works for the ant task and script invocation.
The diffutils jar is injected in the parent classloader.
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SI-7285 Fix match analysis with nested objects
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The fix for SI-6146 introduced `nestedMemberType` to
enumerate sealed subtypes based on the (prefixed) type
of the scrutinee and the symbols of its sealed subclasses.
That method needed to widen `ThisType(modSym)`s to
`ModuleTypeRef(modSym)` before calling `asSeenFrom`.
However, this could lead to confused in the match analysis,
which sees `ModuleTypeRef` as distinct from singleton types
on the same modules (after all, they aren't =:=). Spurious
warnings ensued.
This commit makes two changes:
- conditionally re-narrow the result of `asSeenFrom` in `nestedMemberType`.
- present `a.b.SomeModule.type` as `SomeModule` in warnings emitted
by the pattern matcher.
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SI-7290 Discard duplicates in switchable alternative patterns.
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- make a def a val, we only need to compute it once
- add a clarifying comment
- only report the first duplicate
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The pattern matcher must not allow duplicates to hit the
backend when generating switches. It already eliminates then
if they appear on different cases (with an unreachability warning.)
This commit does the same for duplicated literal patterns in an
alternative pattern: discard and warn.
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SI-6387 Clones accessor before name expansion
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When a symbol's name is expanded due to a conflict during
composition (e.g. multiple traits with same-named members, but
which are not both visible at the language level in the concrete
class) the compiler renames some symbols with expanded names which
embed the full name of the declaring class to avoid clashes.
In the rare cases when the accessor overrides the member in base
class, such expansion either results in AbstractMethodError when
the base method is abstract, or, even worse, can change the
semantics of the program.
To avoid such issues, we clone the accessor symbol, clear its
ACCESSOR flag and enter the symbol with an unchanged name.
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[backport] SI-7237 Always choose ForkJoinTaskSupport
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... on Java 6 and above.
ForkJoinTaskSupport works on Hotspot, Avian and J9,
while ThreadPoolTaskSupport causes the test
test/files/scalacheck/parallel-collections
to reliably hang on all three.
We keep ThreadPoolTaskSupport around to keep the hope
alive that we still have a glimpse of 1.5 support.
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SI-7246 Make $outer pointer elision Java aware
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In e0853b3, a space-saving optimization elided the outer pointer
of inner classes if the the (protected) outer pointer of the
immediate parent class was guaranteed to point to the same instance.
But, this check failed to account for Java parent classes, which
don't follow the Scala scheme. This commit disables the optimization
in that case.
The original test case in e0853b3 was anemic, I've fleshed it out to:
- test the presense or absense of $outer pointers with Java reflection
- test the optimization works in the presense of aliased and annotated
aliased types. (The former worked already, the latter required a
change to the implementation.)
- Test the negative case when the prefixes don't line up and the
subclass in fact needs its own $outer.
This patch is based on work by Euguene Vigdorchik with some
additions by Jason Zaugg.
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SI-7299 Improve error message for eta-expanding 23+ param method
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Before, we got `error: missing arguments for method f`.
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Read version 51 (JDK 7) class files.
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Based on the review of https://github.com/scala/scala/pull/2257, this
commit adds a debuglog when an invokedynamic instruction is found
during class file parsing as a reminder that the implementation is
just a place holder.
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This commit makes the ClassFileReader/ICodeReader parse class files
from JDK 7 (class file version 51). It does that by skipping over
the method handle related entries in the constant pool and by doing
some dummy processing on invoke dynamic instructions. The inliner
is updated to not try to inline a method with an invoke dynamic
instruction. A place holder INVOKE_DYNAMIC instruction is added to ICode
but it is designed to create an error if there's ever any attempt to
analyze it. Because the inliner is the only phase that ever tries
to analyze ICode instructions not generated from Scala source and
because Scala source will never emit an INVOKE_DYNAMIC, the place
holder INVOKE_DYNAMIC should never cause any errors.
A test is included that generates a class file with INVOKE_DYNAMIC
and then compiles Scala code that depends on it.
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Because it will generate a useless element like "</img>".
To made matters worse, Scaladoc used to generate the element with
attributes (like </img src="...">). That's why we had SI-6580.
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Build cleanup 2.10
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Conflicts:
build.xml
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SI-7013 Scaladoc: Fix StackOverflowError
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No one see the result value of parse and if so, it's tail-recursive.
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SI-7251, compiler crash with $.
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SI-7253: respect binary compatibility constraints
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Rename isInterfaceCall -> needsInterfaceCall, which is more accurate since a
receiver can't literally be an interface call.
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The JLS requires, as an exception to generate calls referring to Object for all
methods defined in Object itself; hence, whenever the method owner is Object,
the call should refer to the method owner. The previous commit implemented this
directly in useMethodOwner, so the special case for Object in isInterfaceCall is
now redudant. Hence, remove it.
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From the JLS one can prove that moving a method to a superclass is a binary
compatible change, both forward and backward. That's because when compiling a
method call `c.foo()`, where c: C, the output descriptor *must* refer to `C` and
not to the class where `foo()` is actually defined.
This patch just ensures that, and adds a test comparing generated descriptors
against the Javac output.
The sample code is from Paul Philipps, the fix and the bytecode comparison code
from me.
From 2006 (9954eafffd5e60676238369ab0ed5797c92b4a7b, a fix for bug 455 in the
old bug tracker
http://www.scala-lang.org/sites/default/files/aladdin/displayItem.do%3Fid=455.html)
until 2.9, Scalac has followed this rule "often" (that is, when C is *not* an
interface).
This behavior was wrong, but the bug was hard to trigger. AFAICS, this can
create problems only when moving a method to a super interface in a library and
expecting forward binary compatibility - that is, compiling some Scala client
code against the new version of the library, and trying to run this code against
the old version of the library. This change grows an interface, so it is valid
only if clients are supposed to *not* implement the library. Apparently, this
is so rare that nobody noticed.
Since 2.10 (0bea2ab5f6b211a83bbf14ea46fe57b8163c6334), Scalac follows this rule
*only* when C is an interface (I assume by oversight, since the main change was
an accessibility check), so the bug was finally triggered.
The new code will have to emit INVOKEINTERFACE instead of INVOKEVIRTUAL a bit
more often, compared to 2.9 (but not to 2.10). I don't know whether
INVOKEINTERFACE is noticeably slower (it shouldn't be); but this is the safest
fix since this behavior is mandated by the JLS.
If somebody disagrees and believes the 2.9 is significantly faster, IMHO he
should send a separate pull request (although ProGuard is probably a better
place for the change).
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SI-5699 correct java parser for annotation defs.
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Correct java source parser not to insert a constructor with the type
of its value method.
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removes duplication in FreeDef extractors
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SI-7242 Fix crash when inner object mixes in its companion
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Given:
class C {
trait T { C.this } // C$T$$$outer$ : C
object T extends T { C.this } // C$T$$$outer$ : C.this.type
}
object T ended up with a definitions for both of the accessors.
These cannot co-exist, as they have the same erased type. A crash
ensued almost immediately in explitouter.
Fortunately, the solution is straightforward: we can just omit
the mixin outer accessor altogether, the objects own outer accessor
is compatible with it.
scala> :javap C.T
Compiled from "<console>"
public interface C$T{
public abstract C C$T$$$outer();
}
scala> :javap C.T$
Compiled from "<console>"
public class C$T$ extends java.lang.Object implements C$T{
public C C$T$$$outer();
public C$T$(C);
}
I also added an assertion to give a better error message in
case we find ourselves here again.
Also includes tests from SI-3994, which I'll mark as a duplicate.
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an amazing discovery made by Iulian
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Traces were stalling macro expansions by evaluating messages even when
-Ymacro-debug-* flags were disabled.
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fixes the craziness in JavaUniverse.log
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This long-standing, but trivial to fix nuisance in the implementation of
runtime reflection actively avoided being fixed in both 2.10.0 and 2.10.1.
It's finally the time to put it to a rest.
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SI-7259 Fix detection of Java defined Selects
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The fix for SI-3120, 3ff7743, introduced a fallback within
`typedSelect` that accounted for the ambiguity of a Java
selection syntax. Does `A.B` refer to a member of the type `A`
or of the companion object `A`? (The companion object here is a
fiction used by scalac to group the static members of a Java
class.)
The fallback in `typedSelect` was predicated on
`context.owner.enclosingTopLevelClass.isJavaDefined`.
However, this was incorrectly including Select-s in top-level
annotations in Scala files, which are owned by the enclosing
package class, which is considered to be Java defined. This
led to nonsensical error messages ("type scala not found.")
Instead, this commit checks the compilation unit of the context,
which is more direct and correct. (As I learned recently,
`currentUnit.isJavaDefined` would *not* be correct, as a lazy type
might complete a Java signature while compiling some other compilation
unit!)
A bonus post factum test case is included for SI-3120.
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SI-7249 Reign in overzealous Function0 optimization.
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The fix for SI-1247 went too far, and could result in
premature evaluation of the expression that yields the
Function0.
This commit checks that said expression is safe to inline.
If not, a wrapper `() => ....` is still required.
The optimization is still enabled in sitations like the
original test case, run/t1247.scala.
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SI-6921 SI-7239 Tread lightly during exploratory typing
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