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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-7617 typedAssign no longer expands lhs
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This makes sure that setter and updateDynamic macros work as intended
rather than in some cases expanding incorrectly or prematurely.
Setter invocations are desugared from assignments of values to getters.
If a typecheck of an assignment's lhs yields an invocation of a getter,
then the assignment is rewritten into an invocation of a setter. However
if a getter is a macro, then it just expands, destroying the prerequisite
for desugaring. Therefore we need to disable expansion for the typecheck
of an lhs.
Similar thing happens to updateDynamic that first desugars a getter
invocation into q"$target.updateDynamic($fieldName)" and then expects
typedAssign to rewrite the corresponding Assign node into an additional
application of a partially applied updateDynamic to a rhs. Here we also
need to disable the typecheck of an lhs, because macros cannot be
partially applied.
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SI-7669 Fix exhaustivity warnings for recursive ADTs.
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The pattern matcher's analysis was correctly finding
models under which the match in the enclosed test
could fail. But, when trying to render that model
as a counter example, it ran into an internal inconsistency
and gave up.
That inconsistency arose from VariableAssignment, which:
> turn the variable assignments into a tree
> the root is the scrutinee (x1), edges are labelled
> by the fields that are assigned a node is a variable
> example (which is later turned into a counter example)
In the process, it notes the unreachable case `V2 = NotHandled`,
which can only arise if `V1 = Op`, ie the scrutinee is `Op(NotHandled())`.
V2 is assosicated with the path `x1.arg`. The code then looked for
any variable assosicated with the prefix `x1` and registered that its
field `arg` was assosicated with this variable assignment.
However, the assignment for `V1 = NotHandled` (another missing case)
is also associated with the path `x1`. Registering this field makes
no sense here; we should only do that for `Op`.
This commit conditionally registers the fields based on the class
of `VariableAssignment#cls`. We no longer hit the inconsistency in
`VariableAssignment#allFieldAssignmentsLegal`.
This favourably changes the results of two existing tests.
I had to tweak the counter example pruning to avoid relying on
CounterExample.==, which is flaky in the light of Nil and List().
It is possible to have:
A, B where A != B && A.coveredBy(B) && B.coveredBy(A)
Luckily it is straightforward to implement pruning entirely with
coveredBy.
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The REPL :java -app command is a convenience to locate
the body of DelayedInit code. Now it will look for
new style delayedEndpoints on the class before it
falls back to showing the apply method of the
delayedInit$body closure.
```
apm@mara:~/tmp$ skala
Welcome to Scala version 2.11.0-20130711-153246-eb1c3137f5 (OpenJDK 64-Bit Server VM, Java 1.7.0_21).
Type in expressions to have them evaluated.
Type :help for more information.
scala> :javap -pv -app delayed.C
public final void delayedEndpoint$delayed$C$1();
flags: ACC_PUBLIC, ACC_FINAL
Code:
stack=2, locals=1, args_size=1
0: getstatic #29 // Field scala/Predef$.MODULE$:Lscala/Predef$;
3: ldc #31 // String this is the initialization code of C
5: invokevirtual #35 // Method scala/Predef$.println:(Ljava/lang/Object;)V
8: return
LocalVariableTable:
Start Length Slot Name Signature
0 9 0 this Ldelayed/C;
LineNumberTable:
line 11: 0
scala> :q
apm@mara:~/tmp$ rm delayed/*.class
apm@mara:~/tmp$ scalac delayed.scala
apm@mara:~/tmp$ skala
Welcome to Scala version 2.11.0-20130711-153246-eb1c3137f5 (OpenJDK 64-Bit Server VM, Java 1.7.0_21).
Type in expressions to have them evaluated.
Type :help for more information.
scala> :javap -pv -app delayed.C
public final java.lang.Object apply();
flags: ACC_PUBLIC, ACC_FINAL
Code:
stack=2, locals=1, args_size=1
0: getstatic #13 // Field scala/Predef$.MODULE$:Lscala/Predef$;
3: ldc #15 // String this is the initialization code of C
5: invokevirtual #19 // Method scala/Predef$.println:(Ljava/lang/Object;)V
8: getstatic #25 // Field scala/runtime/BoxedUnit.UNIT:Lscala/runtime/BoxedUnit;
11: areturn
LocalVariableTable:
Start Length Slot Name Signature
0 12 0 this Ldelayed/C$delayedInit$body;
LineNumberTable:
line 11: 0
line 10: 8
```
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SI-4684 Repl supports whole-file paste (rebased)
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By special request, :paste -raw simply compiles the pasted
code to the repl output dir.
The -raw flag means no wrapping; the pasted code must be
ordinary top level Scala code, not script.
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Add a file argument to the :paste command which loads the
file's contents as though entered in :paste mode.
The :paste command is replayable.
Samples, including companions defined together:
```
scala> :paste junk.scala
File contains no code: junk.scala
scala> :paste no-file.scala
That file does not exist
scala> :paste obj-repl.scala
Pasting file obj-repl.scala...
<console>:2: error: expected start of definition
private foo = 7
^
scala> :paste hw-repl.scala
Pasting file hw-repl.scala...
The pasted code is incomplete!
<pastie>:5: error: illegal start of simple expression
}
^
scala> :replay
Replaying: :paste junk.scala
File contains no code: junk.scala
Replaying: :paste obj-repl.scala
Pasting file obj-repl.scala...
defined trait Foo
defined object Foo
Replaying: Foo(new Foo{})
res0: Int = 7
```
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Make the test a SessionTest, where the file name appears just
once, in the transcript, and is trivially compared against itself.
The contents of the saved file are still output and compared with
the check file.
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SI-6419 Repl save session command
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A simple save command to write out the current replay stack.
```
scala> val i = 7
i: Int = 7
scala> val j= 8
j: Int = 8
scala> i * j
res0: Int = 56
scala> :save multy.script
scala> :q
apm@mara:~/tmp$ cat multy.script
val i = 7
val j= 8
i * j
apm@mara:~/tmp$ skala
Welcome to Scala version 2.11.0-20130626-204845-a83ca5bdf7 (OpenJDK 64-Bit Server VM, Java 1.7.0_21).
Type in expressions to have them evaluated.
Type :help for more information.
scala> :load multy.script
Loading multy.script...
i: Int = 7
j: Int = 8
res0: Int = 56
scala> :load multy.script
Loading multy.script...
i: Int = 7
j: Int = 8
res1: Int = 56
```
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SI-4594 Repl settings command
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A settings command for the rest of us.
The usual command line options are used, except that boolean flags
are enabled with +flag and disabled with -flag.
```
scala> :settings +deprecation
scala> new BigInt(java.math.BigInteger.TEN) { }
<console>:8: warning: inheritance from class BigInt in package math is deprecated: This class will me made final.
new BigInt(java.math.BigInteger.TEN) { }
^
res0: BigInt = 10
scala> :settings -deprecation
scala> new BigInt(java.math.BigInteger.TEN) { }
res1: BigInt = 10
```
Multivalue "colon" options can be reset by supplying no values
after the colon. This behavior is different from the command line.
```
scala> 1 toString
warning: there were 1 feature warning(s); re-run with -feature for details
res0: String = 1
scala> :settings -language:postfixOps
scala> 1 toString
res1: String = 1
scala> :settings
-d = .
-encoding = UTF-8
-explaintypes = false
-language = List(postfixOps)
-nowarn = false
scala> :settings -language:
scala> :settings
-d = .
-encoding = UTF-8
-explaintypes = false
-language = List()
-nowarn = false
```
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Quasiquotes
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10229316db allowed macro impls to take and return values of type c.Tree
in addition to the usual c.Expr. However it didn't take into account that
it is often useful to return subtypes of trees (e.g. with quasiquotes
that expand into expressions typed as precisely as possible). This patch
fixes that oversight.
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SI-6574 Support @tailrec for extension methods.
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Currently, when the body of an extension method is transplanted
to the companion object, recursive calls point back to the original
instance method. That changes during erasure, but this is too late
for tail call analysis/elimination.
This commit eagerly updates the recursive calls to point to the
extension method in the companion. It also removes the @tailrec
annotation from the original method.
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SI-6221 inference with Function1 subtypes.
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There appears to be no upper bound on the number of places
we have to remove calls to typeSymbol and introduce calls to
baseType. This one was type inference for function parameter
types: worked when expected type was A => B, but not if there
was an implicit conversion from A => B to the expected type.
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SI-7582 Only inline accessible calls to package-private Java code
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Two problems here.
The inliner was using `isPrivate` / `isProtected` to determine access.
The fallthrough considered things to be (bytecode) public. This is okay
in practice for Scala code, which never emits package private code.
Secondly, we must check accessibility of the called symbol *and* its
owner. This case is tested in `run/t7582b`.
This commit tightens the check for Java defined symbols: a) check the owner,
and b) don't assume that `! isPrivate` is accessible.
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The `privateWithin` attribute of Java companion module classes was
correctly set under joint compilation (ie, when using JavaParser),
but not under separate compilation.
This commit remedies this. The test covers variety of Java symbols.
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Use forward slash in #2637's test on windows
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Don't use toString to output file names in tests,
its output is platform dependent -- use `testIdent` instead.
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Merge 2.10.x into master
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Conflicts:
src/compiler/scala/tools/nsc/typechecker/Duplicators.scala
src/library/scala/concurrent/Future.scala
test/files/jvm/scala-concurrent-tck.scala
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5d9cde105e added deep prohibition of nested classes within
a value class. This has the undesirable side effect of
prohibiting partial functions literals in method bodies
of a value class.
The intention of that prohibition was to avoid problems
in code using Type Tests, such as:
class C(val inner: A) extends AnyVal {
class D
}
def foo(a: Any, other: C) = a match { case _ : other.D }
Here, the pattern usually checks that `a.$outer == other`.
But that is incongruent with the way that `other` is erased
to `A`.
However, not all nested classes could lead us into this trap.
This commit slightly relaxes the restriction to allow anonymous
classes, which can't appear in a type test.
The test shows that the translation generates working code.
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Previously, the `split` method of the `ParTrieMap` iterator threw
an exception when splitting a splitter that iterated over nodes
whose hash codes collide.
This was due to reusing the iterator of the list of colliding keys
rather than creating a new splitter.
This commit changes the `subdivide` method to create a new
iterator using the factory method of the current trie map
iterator rather than returning a `LinearSeqLike` iterator.
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SI-7591 Migrate command-line parsing to s.t.cmd
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new bytecode emitter, GenBCode (11th attempt)
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GenBCode is a drop-in replacement for GenASM with several advantages:
- faster: ICode isn't necessary anymore.
Instead, the ASTs delivered by CleanUp (an expression language)
are translated directly into a stack-language (ASM Tree nodes)
- future-proofing for Java 8 (MethodHandles, invokedynamic).
- documentation included, shared mutable state kept to a minimum,
all contributing to making GenBCode more maintainable
than its counterpart (its counterpart being GenICode + GenASM).
A few tests are modified in this commit, for reasons given below.
(1) files/neg/case-collision
Just like GenASM, GenBCode also detects output classfiles
differing only in case. However the error message differs
from that of GenASM (collisions may be show in different order).
Thus the original test now has a flags file containing -neo:GenASM
and a new test (files/neg/case-collision2) has been added
for GenBCode. The .check files in each case show expected output.
(2) files/pos/t5031_3
Currently the test above doesn't work with GenBCode
(try with -neo:GenBCode in the flags file)
The root cause lies in the fix to
https://issues.scala-lang.org/browse/SI-5031
which weakened an assertion in GenASM
(GenBCode keeps the original assertion).
Actually that ticket mentions the fix is a "workaround"
(3) files/run/t7008-scala-defined
This test also passes only under GenASM and not GenBCode,
thus the flags file. GenASM turns a bling eye to:
An AbstractTypeSymbol (SI-7122) has reached the bytecode emitter,
for which no JVM-level internal name can be found:
ScalaClassWithCheckedExceptions_1.E1
The error message above (shown by GenBCode) highlights
there's no ScalaClassWithCheckedExceptions_1.E1 class,
thus shouldn't show up in the emitted bytecode
(GenASM emits bytecode that mentions the inexistent class).
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SI-7600 [Avian] Skip tests r/stream_length and r/t4294
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The issue is that Avian's GC is currently not precise enough to
determine the exact lifetime of each local/stack reference, and
therefore considers the this reference to be reachable in situations
where it could have been collected.
This can cause issues (as seen in run/stream_length and run/t4294:
`java.lang.OutOfMemoryError`) if code relies on the garbage collection
of these values to keep memory consumption constant.
This commit simply skips these two tests on Avian until the GC
implementation is fixed.
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Modularize parsing
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tools.cmd.CommandLineParser uses a small hand-rolled parser
TODO: replace partest's usage of scala.tools.nsc.util.CommandLine
by scala.tools.cmd.CommandLine
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SI-7599 Modify methods to be non-tail-callable ...
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This commit modifies methods in the test to be non-tail-callable to
prevent Avian from eliding the stack frames we want to inspect.
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SI-7584 Fix typer regression with by-name parameter types
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The enclosed test case exercises by-name closures, which were
the subject of the previous commit. In the process, a spurious
warning was eliminated.
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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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SI-7439 Avoid NPE in `isMonomorphicType` with stub symbols. …
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`originalInfo` can return null for stub symbols; deal with that
as we used to before a regression in 016bc3db.
After this change, we can once again delete A_1.class and still compile
code instantiating B_1. (A_1 is only referred to in a method signature
of B_1 which is not called from our code.)
scala> new B_1
warning: Class A_1 not found - continuing with a stub.
res0: B_1 = B_1@5284b8f9
In practice, this situation arises when someone uses a third
party class that was compiled against other libraries not avaialable
on the current compilation classpath.
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Looks like partest's confusion about / vs. \ was fixed between
the original Jenkins run of the fix for SI-7292 and its merge.
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SI-7151 Emit final in bytecode for final inner classes.
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As we did before a regression in 18efdedfb / SI-5676.
This commit tightens up the condition in which the FINAL
modifier is omitted; it now *only* does this for the module
classes of nested objects.
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