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http://openjdk.java.net/jeps/220 changes the layout of the
JDK to encapsulate the provided libraries with the new module
system.
This commit modifies the compiler's classpath implementation
to scan the new location of these, the `jrt://` virtual filesystem.
This might need to be adjusted once we provide a means for
users to specify the subset of modules that they want to
depend on, but for now reclaims the ground we lost.
```
⚡ (java_use 9-ea; qscala)
Welcome to Scala 2.12.0-20160908-223617-7e4ebda (Java HotSpot(TM) 64-Bit Server VM, Java 9-ea).
Type in expressions for evaluation. Or try :help.
scala> import StackWalker._, java.util.stream._, scala.collection.JavaConverters._
import StackWalker._
import java.util.stream._
import scala.collection.JavaConverters._
scala> (() => StackWalker.getInstance(java.util.EnumSet.of(Option.RETAIN_CLASS_REFERENCE)).walk[Seq[String]]((s: java.util.stream.Stream[StackFrame]) => s.iterator.asScala.take(3).map(_.toString).toList)).apply().mkString("\n")
res0: String =
.$anonfun$res0$1(<console>:21)
.<init>(<console>:21)
.<clinit>(<console>)
scala>
```
I've marked the new class, `NioFile` as `private[scala]` to justify
the forward compatibility whitelist entry.
In principle we could use NioFile more widely rather than `PlainFile`
I tried this out in https://github.com/retronym/scala/commit/b2d0a17a
which passed CI. But to be conservative, I'm not submitting that change
at this point.
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Implicit conversions are now in package convert as ImplicitConversions,
ImplicitConversionsToScala and ImplicitConversionsToJava.
Deprecated WrapAsJava, WrapAsScala and the values in package object.
Improve documentation.
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- Language imports are preceding other imports
- Deleted empty file: InlineErasure
- Removed some unused private[parallel] methods in
scala/collection/parallel/package.scala
This removes hundreds of warnings when compiling with
"-Xlint -Ywarn-dead-code -Ywarn-unused -Ywarn-unused-import".
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This commit contains some minor changes made by the way when
implementing flat classpath.
Sample JUnit test that shows that all pieces of JUnit infrastructure
work correctly now uses assert method form JUnit as it should do from
the beginning.
I removed commented out lines which were obvious to me. In the case
of less obvious commented out lines I added TODOs as someone should
look at such places some day and clean them up.
I removed also some unnecessary semicolons and unused imports.
Many string concatenations using + have been changed to string
interpolation.
There's removed unused, private walkIterator method from ZipArchive.
It seems that it was unused since this commit:
https://github.com/scala/scala/commit/9d4994b96c77d914687433586eb6d1f9e49c520f
However, I had to add an exception for the compatibility checker
because it was complaining about this change.
I made some trivial corrections/optimisations like use 'findClassFile'
method instead of 'findClass' in combination with 'binary' to find
the class file.
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This commit adds an implementation of flat classpath which can handle
both jar and vanilla zip files. In fact there are two versions - for
a class- and a sourcepath. Both extend ZipArchiveFileLookup which
provides common logic.
They use FileZipArchive. @gkossakowski made a comparison of different
ways of handling zips and jars (e.g. using javac's ZipFileIndex). He
stated that general efficiency of FileZipArchive, taking into account
various parameters, is the best.
FileZipArchive is slightly changed. From now it allows to find the
entry for directory in all directory entries without iterating all
entries regardless of a type. Thanks to that we can simply find
a directory for a package - like in the case of DirectoryFileLookup.
There's also added possibility to cache classpath representation of
classpath elements from jar and zip files across compiler instances.
The cache is just a map AbstractFile -> FlatClassPath. It should
reduce the number of created classpath and file instances e.g. in the
case of many ScalaPresentationCompilers in Scala IDE.
To prevent the possibility to avoid a cache, caches are created as
a part of factories responsible for the creation of these types of
the flat classpath.
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- Moves mergeUrlsIntoClassPath from Global into ClassPath
- Revises and documents AbstractFile.getURL
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Before this commit, Symbol.associatedFile used to be broken in two ways.
Firstly, it was never autoloaded (just like we used to have flags,
privateWithin and annotations). Secondly, it was never filled in by runtime
reflection.
My first attempt at fixing those problems was, well, just fixing them.
However, its runtime implementation was based on a hacky function that
we were not very much excited about supported (see comments),
whereas its compile-time usefulness was somewhat questionable.
Therefore the second attempt at fixing this bug is deprecating the API
altogether, replacing it with `Symbol.pos.source`.
Since `Symbol.pos` isn't retained for runtime consumption,
`Symbol.pos.source` is still going to return `NoAbstractFile` as before
this commit, but that's left for future work, and suggested approach
is documented in SI-8259.
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Augment the IOException with the name of the file we're trying
to open.
Motivated by a troubleshooting session with partial downloads
of JARs from Maven central breaking the Scala build on Martin's
laptop.
The test case only tests our part of the error message, so as not
to be platform / JDK specific. Otherwise, it would check that the
correct cause exception was present and accounted for.
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AbstractFile.getDirectory does not return null when outDir is "."
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Confusing, now-it-happens now-it-doesn't mysteries lurk
in the darkness. When scala packages are declared like this:
package scala.collection.mutable
Then paths relative to scala can easily be broken via the unlucky
presence of an empty (or nonempty) directory. Example:
// a.scala
package scala.foo
class Bar { new util.Random }
% scalac ./a.scala
% mkdir util
% scalac ./a.scala
./a.scala:4: error: type Random is not a member of package util
new util.Random
^
one error found
There are two ways to play defense against this:
- don't use relative paths; okay sometimes, less so others
- don't "opt out" of the scala package
This commit mostly pursues the latter, with occasional doses
of the former.
I created a scratch directory containing these empty directories:
actors annotation ant api asm beans cmd collection compat
concurrent control convert docutil dtd duration event factory
forkjoin generic hashing immutable impl include internal io
logging macros man1 matching math meta model mutable nsc parallel
parsing partest persistent process pull ref reflect reify remote
runtime scalap scheduler script swing sys text threadpool tools
transform unchecked util xml
I stopped when I could compile the main src directories
even with all those empties on my classpath.
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Some unused private code, unused imports, and points where
an extra pair of parentheses is necessary for scalac to have
confidence in our intentions.
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If we just established that the given path is a File or a Directory,
we can assume it continues to exist.
Before
----------------------------------
File.isFile calls : 7620
File.isDirectory calls : 2319
File.exists calls : 5770
After
----------------------------------
File.isFile calls : 7620
File.isDirectory calls : 2319
File.exists calls : 345
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Due to limitations in the Statistics machinery, these are only
reported if this patch is applied.
--- a/src/reflect/scala/reflect/internal/util/Statistics.scala
+++ b/src/reflect/scala/reflect/internal/util/Statistics.scala
@@ -109,7 +109,7 @@ quant)
* Quantities with non-empty prefix are printed in the statistics info.
*/
trait Quantity {
- if (enabled && prefix.nonEmpty) {
+ if (prefix.nonEmpty) {
val key = s"${if (underlying != this) underlying.prefix else ""}/$prefix"
qs(key) = this
}
@@ -243,7 +243,7 @@ quant)
*
* to remove all Statistics code from build
*/
- final val canEnable = _enabled
+ final val canEnable = true // _enabled
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[rebase of #2206] l JSR-223 compliance for the interpreter
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Since slurp by definition is the noise made by the straw when
the cup is empty and all milk shake is consumed, we can safely
close after slurping.
Use case was deleting a test artifact on Windows.
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Use .length directly, avoiding the allocation of the WrappedArray.
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The first in the family of mutators for the global symbol table,
`introduceTopLevel` is capable of creating synthetic top-level
classes and modules.
The addition of nme.EMPTY_PACKAGE_NAME is necessary to let
programmers insert definitions into the empty package. That's explicitly
discouraged in the docs, but at times might come in handy.
This patch introduce workarounds to avoid incompatibilities with SBT.
First of all SBT doesn't like VirtualFiles having JFile set to null.
Secondly SBT gets confused when someone depends on synthetic files
added by c.introduceTopLevel.
Strictly speaking these problems require changes to SBT, and that will be
done later. However the main target of the patch is paradise/macros,
which needs to be useful immediately, therefore we apply workarounds.
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Mostly hailing from a long-ago day when I imagined I was
writing a general purpose library. We dodged that bullet.
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Translating <code></code> into backticks.
Removed the "@param tree ..." blocks which have been
taunting me for half a decade now.
Removed commented-out blocks of code which had been
sitting there for two years or more.
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This reverts commit 951fc3a486.
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I want to get this commit into the history because
the tests pass here, which demonstrates that every commented
out method is not only unnecessary internally but has zero
test coverage. Since I know (based on the occasional source
code comment, or more often based on knowing something about
other source bases) that some of these can't be removed
without breaking other things, I want to at least record
a snapshot of the identities of all these unused and
untested methods.
This commit will be reverted; then there will be another
commit which removes the subset of these methods which I
believe to be removable. The remainder are in great need of
tests which exercise the interfaces upon which other
repositories depend.
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* migrates scala.tools.nsc.io portions into scala.reflect.io
* marks all classes in scala.reflect.io experimental/internal
* rewires src/reflect to use new io locations
* creates forwarders in scala.tools.nsci.io package object.
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