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SI-7715 String inpatternation s"$_" for s"${_}"
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In a pattern,
```
scala> implicit class RX(val sc: StringContext) {
| def rx = sc.parts.mkString("(.+)").r }
defined class RX
scala> "2 by 4" match { case rx"$a by $_" => a }
res0: String = 2
scala> val rx"$_ by $b" = "2 by 4"
b: String = 4
```
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SI-7470 implements fundep materialization
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This fix provides implicit macros with an ability to affect type inference
in a more or less sane manner. That's crucial for materialization of
multi-parametric type class instances (e.g. Iso's from shapeless).
Details of the technique can be found in comments.
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SI-7544 Interpolation message for %% literal
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Since interpolator args are of type Any, it's easy
to write s(args) instead of s(args: _*). I wonder
if Xlint would have warned me about that.
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The new error text: "conversions must follow a splice; use %% for
literal %, %n for newline".
The error is emitted when % is not at the start of a part; only
the non-conversions %% and %n are allowed.
It would be nice if it were convenient to parse the part to see
what the user may have intended, but c'est l'erreur.
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SI-7624 Fix -feature and some -Xlint warnings
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Bug fix ! , if $color_opts is unset partest script does not work.
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SI-7737 Regex matches Char
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Enables Char extraction by regex.
```
val r = """(\p{Lower})""".r
"cat"(0) match { case r(x) => true }
val nc = """\p{Lower}""".r
"cat"(0) match { case nc() => true }
```
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SI-7265 javaSpecVersion, adjust isJava... tests for 2.11
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Make this and related properties public, because they
are useful.
This change ought to have been committed at 2.11 and then
backported with restrictions, rather than vice-versa.
Note that they are defined in the order, version, vendor
and name, which is the order from the underlying javadoc.
It would be a neat feature of the PR validator, as previously
imagined, to run a "pending" test and then, on success and
merge, to move it automatically to the canonical suite.
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SI-7690 ghost error message fails compile [Rebase of #2763]
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I won't even try to explain the error reporting code, because
it would have no basis in reality. However this change appears
to fix the symptom reported.
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SI-7729 Does Par-Test work? Absolutely!
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Testicolor just passed file arguments through; this commit does
either toAbsolute or getAbsoluteFile (depending on the File API
impedance mismatch) at ConsoleRunner (command line) and Runner
(ant supplies absolute paths, but in case sbt runner doesn't,
and who knows). It also sprinkles toAbsolute internally, where
it may be redundant. Do I mean redundant or redolent?
I noticed that my branch from last year relativized to test root
always; so this is one of those choices one commits to.
The point of breakage in this case was, if a path is not absolute,
use test root / path, which only works (of course) if the relative
path is relative to test root, which is no longer the case.
Because all paths are now calculated with respect to the test file
path, the "out" dir would change its relative path depending on
the invocation.
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Check files split into conditional blocks with partest flags
have been broken since the new diff regime.
For some reason, no one noticed.
The clever scheme to "filter the diff" instead of just filtering
the check file is abandoned as futile and unnecessary.
Fix java6 checkfile for ifdiff fix.
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Making map2Conserve occupy constant stack space in spirit of SI-2411.
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I recently discovered a StackOverflowError, caused by this function:
https://gist.github.com/folone/7b2f2e2a16314ab28109
The circumstances are pretty extreme, still having a tail-recursive
function seems to be a good idea.
The function behaves the same way old function did (supported by tests),
which is not really how map2 behaves. I did not change this behavior to
not introduce any regression. I actually tried to make it behave like map2,
and it does introduce regression.
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DefDef.name is now TermName again
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Now when there's no hope left for type macros, it's reasonable to provide
a more specific type for DefDef.name.
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Fix N^2 spot in erasure.
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An expression containing nested casts would type the same tree 2^N
times where N is the number of nested casts. This was particularly
visible in Vector.scala where one can find a six-cast expression.
It's currently line "why was six afraid of seven", aka line 789.
display5((index >> 25) & 31)
.asInstanceOf[Array[AnyRef]]((index >> 20) & 31)
.asInstanceOf[Array[AnyRef]]((index >> 15) & 31)
.asInstanceOf[Array[AnyRef]]((index >> 10) & 31)
.asInstanceOf[Array[AnyRef]]((index >> 5) & 31)
.asInstanceOf[Array[AnyRef]](index & 31)
.asInstanceOf[T]
Compiling Vector.scala, before/after.
< #unique types : 10805
> #unique types : 9722
< #created tree nodes : 26716
> #created tree nodes : 25647
I found a similar bug about a year ago in 39f01d4f48. It's
interesting to consider how little defense we have against bugs
of this nature - visually non-obvious differences in tree
traversal can have spectacular impact on complexity.
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Refactor the cake so SymbolTable does not depend on Global
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Add a test which demonstrates how one can create symbols and types
from scratch and perform sub type check using them.
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SymbolTable refactoring introduced some TODOs that were supposed
to be addressed after M5 release. The reason I couldn't address
those problems right away was a conflict with our plans to modularize
Scaladoc and interactive. However, we decided to delay that work
until after M5 is released so addressing TODOs is not blocked
anymore.
This commit introduces the following changes:
* Eclipse project definitions for interactive and scaladoc
depend on scala-compiler project so they are builded against
latest version of the compiler (quick) instead of STARR.
This aligns our Eclipse project definitions with build.xml
structure.
* Introduce GlobalSymbolLoaders class which wires dependencies
of SymbolLoaders with assumption of dependency on Global.
* Switch to GlobalSymbolLoaders in BrowsingLoaders,
interactive Global and ScaladocGlobal; this eliminates all
TODO comments introduced before
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Add a SymbolTableTest which contains all the code needed to
initialize a SymbolTable in JUnit environment. It shows
that initialization of definitions works and one can easily
lookup some symbols and perform tests like subtyping tests.
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ClassfileParser depends on forcing infos during typer phase.
It's not entirely clear why this is needed (git blame doesn't
help much) but I decided to preserve the logic.
Therefore, I introduced an abstract method called
`lookupMemberAtTyperPhaseIfPossible` which preserves the original
semantics but is implemented outside of ClassfileParser so the
ClassfileParser itself doesn't need to depend on typer phase and
phase mutation utilities.
I removed `loaders` override in `test/files/presentation/doc`.
I would have to update it to implement the
`lookupMemberAtTyperPhaseIfPossible` method. However, the override
doesn't seem to be doing anything useful so I just removed it.
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Improve type printing (toString/debugging)
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More consistency as to how to understand aliases,
singletons, specialized symbols, subclasses. Fewer
weird special casings, like normalizing tuples
and functions during type printing, but nothing else.
I avoid "normalize" entirely now, and do not make
special cases for dealiasing, which is already well
handled when printing error messages.
Look at the change to test/files/neg/t2641.check to get
a sense of why we should resist calling normalize during
the early days of a compilation run.
Anonymous and refinement classes can be printed far more
usefully by revealing their parents, and that too is here.
Hardened toString against undesirable side effects.
Make toString final to discourage any further rogue
toString overriders. Make safeToString a little safer.
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Conflicts:
bincompat-backward.whitelist.conf
bincompat-forward.whitelist.conf
src/compiler/scala/reflect/reify/phases/Reshape.scala
src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
src/compiler/scala/tools/nsc/transform/Mixin.scala
src/compiler/scala/tools/nsc/typechecker/RefChecks.scala
src/compiler/scala/tools/nsc/typechecker/Typers.scala
src/library/scala/concurrent/impl/Promise.scala
src/reflect/scala/reflect/internal/StdAttachments.scala
test/files/neg/macro-override-macro-overrides-abstract-method-b.check
test/files/run/t7569.check
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Not sure which partest bug allowed this, but the old name was wrong.
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SI-7455 Drop dummy param for synthetic access constructor
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Java synthesizes public constructors in private classes to
allow access from inner classes. The signature of
that synthetic constructor (known as a "access constructor")
has a dummy parameter appended to avoid overloading clashes.
javac chooses the type "Enclosing$1" for the dummy parameter
(called the "access constructor tag") which is either an
existing anonymous class or a synthesized class for this purpose.
In OpenJDK, this transformation is performed in:
langtools/src/share/classes/com/sun/tools/javac/comp/Lower.java
(Incidentally, scalac would just emits a byte-code public
constructor in this situation, rather than a private constructor /
access constructor pair.)
Scala parses the signature of the access contructor, and drops
the $outer parameter, but retains the dummy parameter. This causes
havoc when it tries to parse the bytecode for that anonymous class;
the class file parser doesn't have the enclosing type parameters
of Vector in scope and crash ensues.
In any case, we shouldn't allow user code to see that constructor;
it should only be called from within its own compilation unit.
This commit drops the dummy parameter from access constructor
signatures in class file parsing.
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SI-7636 Fix a NPE in typing class constructors
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If we encountered an erroneous super call due to a
failure in parent type argument inference, we must
avoid inspecting the untyped children of erroneous
trees.
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introduced in 5b54681: the end position of Postfix operators should
take the operator length into account.
review by @som-snytt
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Currently we allow macros to override non-abstract methods (in order
to provide performance enhancements such as foreach for collections),
and we also disallow macros to override abstract methods (otherwise
downcasting might lead to AbstractMethodErrors).
This patch fixes an oversight in the disallowing rule that prohibited
macros from overriding a concrete method if that concrete method itself
overrides an abstract method. RefCheck entertains all overriding pairs,
not only the immediate ones, so the disallowing rule was triggered.
Now macros can override abstract methods if and only if either the base
type or the self type contain a matching non-abstract method.
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SI-7336 Link flatMapped promises to avoid memory leaks
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SI-7265 General test for spec version
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The test for isJavaAtLeast uses the specification.version.
The method argument must have the form "major.minor".
The scaladoc is updated to reflect the new reality and a
test is added under junit.
Note that this implementation aims to be a simple
compromise between the functional and imperative camps,
that is, to be free of both closures and while loops.
And to elicit no cruft like regexes and wrappers for strings.
No doubt even more could be done in this department, but we
don't wish to spoil the fun on codegolf.stackexchange.com.
However, we might decide to sponsor a new site:
codereviewpingpong.com
For 2.10.x, javaSpecVersion is provided as a private member.
The active test is under `run` and the `junit` test must
bide its time in `pending`.
For 2.11, the private members can be public and the app test
replaced with the unit test.
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SI-7649 Fix positions for reshaped tag materializers
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