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The line content to display should include the whole line,
inclusive of embedded line breaks, and any control chars
should be displayed in unicode escape.
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Source lines were counted by "line break chars", including FF.
Clients of `pos.line` seem to all expect the ordinary line num,
so that is what they get.
Unicode processing now precedes line ending processing.
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SI-7492 Make scala.runtime.MethodCache private[scala]
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These are internal implementation details which shouldn't be exposed
to users (and might go away when support for invokedynamic is added).
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SI-8120 Avoid tree sharing when typechecking patmat anon functions
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When typechecking an empty selector `Match` corresponding to:
{ case ... => ... }: (A => B)
We wrap it in a `Function` and typecheck:
(x$1 => x$1 match { case ... => ... })
Local symbols in this expression (representing values bound by
the pattern, or just definitions in the body or guard) are then
owned by the anonymous function's symbol.
However, if we ever discard this `Function` and start anew with
the empty selector match, as happens during the fallback to
use a view on the receiver in `tryTypedApply`, we found that we
had mutated the cases of the original tree, and allowed orphaned
local symbols to escape into the compiler pipeline.
This commit uses duplicated trees for the the cases in the synthetic
`Match` to avoid this problem.
`duplicateAndKeepPositions` is used to preserve range positions;
without this scala-refactoring PrettyPrinterTest fails.
`Tree#duplicate` uses offset positions in the copied tree, which
is appropriate when both the original and the copy are going to end up
in the final tree.
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Fix (postfix abs for -0.0)
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SI-8102 points out that -0.0.abs returns -0.0 (in error). The same issue
exists for -0.0f. This commit fixes the issue for both by delegating to
math.abs.
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Improved testing framework for sets and maps.
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Switched to JUnit testing framework for sets and maps. They now test
broadly against each other for consistency. Tests for mutable.AnyRefMap
and mutable.LongMap are folded in here (originals removed). There is still
lots of redundancy with other tests that has not been removed.
This framework is also designed to enable more robust testing of changes to
implementations of sets and maps; although it's still quite possible to get
a broken implementation through, these tests should make it harder to get
the fundamentals wrong.
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Resolves SI-7837, failure in quickSort.
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because the code uses '==' instead of 'equiv'
== instead of equiv (from Ordering) was used by mistake. Fixed.
Also created a test to make sure that == is not used by throwing an exception if it is (as suggested by Jason).
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awakens default getter synthesis from the untyper nightmare
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Unlike with default getters, removing untyper from case class synthesis
was trivial. Just resetLocalAttrs on a duplicate of the provided class def,
and that’s it.
resetAllAttrs, you’re next. We’ll get to you! Eventually...
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Our happy little macro paradise is regularly invaded by resetAllAttrs,
the bane of all macros and typers. It’s so ruthless and devastating that
we’ve been long scheming to hack something really cool and to one day
defeat it.
Today we make the first step towards the happy future. Today we overthrow
the UnTyper, resetAllAttrs’s elder brother that rules in the kingdoms of
GetterLand and CaseClassia, and banish him from the land of getters.
In the name of what’s good and meta, let’s band together and completely
drive him away in a subsequent pull request!
To put it in a nutshell, instead of using untyper on a DefDef to do
default getter synthesis, the commit duplicates the DefDef and does
resetLocalAttrs on it.
As default getter synthesis proceeds with figuring out type and value
parameters for the getter, then its tpt and finally its rhs, the commit
destructures the duplicated DefDef and then assembles the default getter
from the destructured parts instead of doing copyUntyped/copyUntypedInvariant
on the original DefDef.
I would say the test coverage is pretty good, as I had to figure out
3 or 4 test failures before I got to the stage when everything worked.
Iirc it tests pretty exotic stuff like polymorphic default parameters
in both second and third parameter lists, so it looks like we're pretty
good in this department.
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Fix typos in documentation
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SI-7880 Fix infinite loop in ResizableArray#ensureSize
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This issue was triggered for values greater than Int.MaxValue/2, which
caused the computation of the new array size to overflow and become
negative, leading to an infinite loop.
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SI-8052 Disallow `macro` as an identifier
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Note that the change could look a lot cleaner, at the cost of returning
more generic error messages. I decided that at least for 2.11 I'll keep
scalac remembering that macro was a standard identifier name once, so
that we can point out more precisely what's wrong with users' code.
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SI-8047 change fresh name encoding in quasiquotes to avoid symbol owner corruption
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Previously a following encoding was used to represent fresh
names that should be created at runtime of the quasiquote:
build.withFreshTermName(prefix1) { name$1 =>
...
build.withFreshTermName(prefixN) { name$N =>
tree
}
...
}
It turned out that this encoding causes symbol corruption when
tree defines symbols of its own. After being spliced into anonymous
functions, the owner chain of those symbols will become corrupted.
Now a simpler and probably better performing alternative is
used instead:
{
val name$1 = universe.build.freshTermName(prefix1)
...
val name$N = universe.build.freshTermName(prefixN)
tree
}
Here owner stays the same and doesn’t need any adjustment.
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typeCheck => typecheck
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This method has always been slightly bothering me, so I was really glad
when Denys asked me to rename it. Let’s see how it pans out.
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fix Stream#flatten example
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crasher with specialized lazy val
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This reverts a tiny bit of f7d5f45aa7 where the crasher was
introduced. The enclosed test case compiles and runs under 2.9,
but prints the wrong answer. It crashes in 2.10 and until this
patch. Now it compiles and prints the right answer.
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makes boxity of fast track macros configurable
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Previously, all built-in macros were assumed to be whitebox, but that’s
actually not the case. Just quasiquote macros have to be whitebox, while
the rest can be blackbox.
This also fixes SI-8091, because blackbox macros are typechecked differently
and therefore the necessary implicit conversion kicks in. If `f”...”` were
to remain a whitebox macro, then due to the changes introduced in commit
https://github.com/scala/scala/commit/a3b33419b02cafb7e2c6fed6dd96151859fc7d77
we would have to explicitly ascribe its expansion as String to achieve the same effect.
After I made reify blackbox, several tests had to be changed, because
we now explicitly ascribe the expansion with `c.Expr[T]`, which changes `toString`.
Also, a number of less obvious corrections had to be applied, because
things like `reify(<constant>).splice` have stopped being optimized away
due to `reify(<constant>)` no longer having a narrow `c.Expr[<constant>.type]`,
making it ineligible for constant folding.
Moreover, this change forced me to adjust our approach to positioning
blackbox wrappings, because after being changed to blacbox and starting using
wrappings, f”...” interpolators used in the compiler started crashing
-Yrangepos builds. Now wrapping Typed nodes are assigned with transparent
positions.
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Added .ant-targets-build.xml to .gitignore.
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Something generates this repo-dirtying file during ant replacestarr.
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Remove commented out code from HashSet and HashMap
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Remove an ancient, commented out microbenchmark from HashSet and HashMap.
Also, fix indentation for while loop in HashSet.foreach and remove some
other commented out code that no longer serves any purpose.
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makes well-known packages and package classes consistent with each other
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As discovered in https://groups.google.com/forum/#!topic/scala-user/RckXE90LoXo,
RootClass.sourceModule and EmptyPackageClass.sourceModule used to incorrectly
return NoSymbol instead of RootModule and EmptyPackage. This is now fixed.
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duplicates arguments to macro typer APIs
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This commit continues the tendency set by the parent commit to duplicate
as much as possible in order to avoid potential confusion that users
might run into when compiler internals start leaking.
Here we plumb another way that by-reference sharing of trees might bite
unsuspecting macro writers. Previously we have duplicated macro expansions,
macro arguments, c.macroApplication, and now it’s arguments to typeCheck
and resetAttrs.
There is still an unlikely situation when someone gets to c.enclosingXXX
and then starts typechecking around, but that’s left for future work,
as it’s yet unclear what to do with c.enclosingXXX APIs.
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<uptodate> Ant-ics
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This was recently refactored from build.xml. Changing either file
should invalidate caches.
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Changes to the compiler or library were not triggering recreation
of the OSGI JARs, which are used in the local maven deployment tasks.
Reason: this Ant-ipattern:
<fileset base="/foo">
<include name="/foo/bar.baz"/>
</fileset>
Instead, we should use a <filelist/>, which doesn't require
a base directory. This can be composed into a <srcresources/>
element in the <uptodate/>.
Phew!
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SI-7777 SI-8006 assorted fixes for dynamics
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Since mkInvoke, the applyDynamic/selectDynamic/etc desugarer, is disconnected
from typedNamedApply, the applyDynamicNamed argument rewriter, the latter
doesn’t know whether it needs to apply the rewriting because the application
has just been desugared or it needs to hold on because it’s already performed
a desugaring on this tree.
This commit introduces the attachment that links these translation facilities,
preventing infinite applyDynamicNamed desugarings.
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Interplay between the insertApply desugaring and the invokeDynamic desugarings
is already quite brittle, but the real fun begins when macros crash the party.
The proposed patch enriches the `isDesugaredApply` check performed in
`mkInvoke`, the invokeDynamic desugarer, and makes sure that everything
is safe and sound in the macroland.
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(master) codifies the state of the art wrt SI-8104
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As it was discovered in SI-8104, whiteboxity doesn’t apply equally to
type parameters and type members of materialized type classes.
During implicit search and subsequent type inference, whitebox type parameters
are consistently erased to wildcards, whereas whitebox type members sometimes
remain as is and get in the way of signature conformance checks.
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SI-6355 SI-7059 it is possible to overload applyDynamic
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As our discussion at https://issues.scala-lang.org/browse/SI-6355 shows,
it looks like it is possible to overload applyDynamic, even though a
straightforward way is closed. This commit codifies the pattern proposed
by @paulp and makes sure that it doesn’t break in the future.
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