| Commit message (Collapse) | Author | Age | Files | Lines |
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* commit 'refs/pull/1574/head': (24 commits)
Fixing issue where OSGi bundles weren't getting used for distribution.
Fixes example in Type.asSeenFrom
Fix for SI-6600, regression with ScalaNumber.
SI-6562 Fix crash with class nested in @inline method
Brings copyrights in Scaladoc footer and manpage up-to-date, from 2011/12 to 2013
Brings all copyrights (in comments) up-to-date, from 2011/12 to 2013
SI-6606 Drops new icons in, replaces abstract types placeholder icons
SI-6132 Revisited, cleaned-up, links fixed, spelling errors fixed, rewordings
Labeling scala.reflect and scala.reflect.macros experimental in the API docs
Typo-fix in scala.concurrent.Future, thanks to @pavelpavlov
Remove implementation details from Position (they are still under reflection.internal). It probably needs more cleanup of the api wrt to ranges etc but let's leave it for later
SI-6399 Adds API docs for Any and AnyVal
Removing actors-migration from main repository so it can live on elsewhere.
Fix for SI-6597, implicit case class crasher.
SI-6578 Harden against synthetics being added more than once.
SI-6556 no assert for surprising ctor result type
Removing actors-migration from main repository so it can live on elsewhere.
Fixes SI-6500 by making erasure more regular.
Modification to SI-6534 patch.
Fixes SI-6559 - StringContext not using passed in escape function.
...
Conflicts:
src/actors-migration/scala/actors/migration/StashingActor.scala
src/compiler/scala/tools/nsc/backend/jvm/GenASM.scala
src/compiler/scala/tools/nsc/settings/AestheticSettings.scala
src/compiler/scala/tools/nsc/transform/Erasure.scala
src/library/scala/Application.scala
src/library/scala/collection/immutable/GenIterable.scala.disabled
src/library/scala/collection/immutable/GenMap.scala.disabled
src/library/scala/collection/immutable/GenSeq.scala.disabled
src/library/scala/collection/immutable/GenSet.scala.disabled
src/library/scala/collection/immutable/GenTraversable.scala.disabled
src/library/scala/collection/mutable/GenIterable.scala.disabled
src/library/scala/collection/mutable/GenMap.scala.disabled
src/library/scala/collection/mutable/GenSeq.scala.disabled
src/library/scala/collection/mutable/GenSet.scala.disabled
src/library/scala/collection/mutable/GenTraversable.scala.disabled
src/library/scala/collection/parallel/immutable/ParNumericRange.scala.disabled
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Until now lazy accessors were handled somehow special because their symbol was created in typers but the corresponding tree was only added in Refchecks. This irregularity caused serious problems for value classes. Also it now looks just better when lazy value is treated in a similar way as other fields.
I needed to adapt reifier so that it handles the new implementation correctly. Previously it had to recreate lazy val only by removing defdef and renaming. Now we basically need to recreate lazy val from scratch.
There is one minor change to cps plugin but that is still fine because lazy vals were never really part of the transformation.
Some range positions needed to be fixed manually. We could do it at the creation time but that would require a lot more "if (symbol.isLazy)" conditions for MethodSyntheis and Symbol/Tree creation and would just unnecessary complicate api. If someone has a better idea, please speak up. Range positions changes were necessary because previously accessors were created at refchecks and they weren't checked by validator (even though they were wrong).
This commit removes lazy val implementation restriction introduced for 2.10.0.
(cherry-picked from 981424b)
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According to "git diff" the difference from master to this
commit includes:
Minus: 112 vals, 135 vars
Plus: 165 vals, 2 vars
Assuming all the removed ones were vals, which is true from 10K feet,
it suggests I removed 80 unused vals and turned 133 vars into vals.
There are a few other -Xlint driven improvements bundled with this,
like putting double-parentheses around Some((x, y)) so it doesn't
trigger the "adapting argument list" warning.
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Until now lazy accessors were handled somehow special because their symbol was created in typers but the corresponding tree was only added in Refchecks. This irregularity caused serious problems for value classes. Also it now looks just better when lazy value is treated in a similar way as other fields.
I needed to adapt reifier so that it handles the new implementation correctly. Previously it had to recreate lazy val only by removing defdef and renaming. Now we basically need to recreate lazy val from scratch.
There is one minor change to cps plugin but that is still fine because lazy vals were never really part of the transformation.
Some range positions needed to be fixed manually. We could do it at the creation time but that would require a lot more "if (symbol.isLazy)" conditions for MethodSyntheis and Symbol/Tree creation and would just unnecessary complicate api. If someone has a better idea, please speak up. Range positions changes were necessary because previously accessors were created at refchecks and they weren't checked by validator (even though they were wrong).
This commit removes lazy val implementation restriction introduced for 2.10.0.
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These things are killing me. Constructions like
package scala.foo.bar.baz
import foo.Other
DO NOT WORK in general. Such files are not really in the
"scala" package, because it is not declared
package scala
package foo.bar.baz
And there is a second problem: using a relative path name means
compilation will fail in the presence of a directory of the same
name, e.g.
% mkdir reflect
% scalac src/reflect/scala/reflect/internal/util/Position.scala
src/reflect/scala/reflect/internal/util/Position.scala:9: error:
object ClassTag is not a member of package reflect
import reflect.ClassTag
^
src/reflect/scala/reflect/internal/util/Position.scala:10: error:
object base is not a member of package reflect
import reflect.base.Attachments
^
As a rule, do not use relative package paths unless you have
explicitly imported the path to which you think you are relative.
Better yet, don't use them at all. Unfortunately they mostly work
because scala variously thinks everything scala.* is in the scala
package and/or because you usually aren't bootstrapping and it
falls through to an existing version of the class already on the
classpath.
Making the paths explicit is not a complete solution -
in particular, we remain enormously vulnerable to any directory
or package called "scala" which isn't ours - but it greatly
limts the severity of the problem.
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One approach would be to disallow an implicit class in a template
that already has a member with the same name.
But this commit doesn't do this; instead it uses `isSynthetic` to
find the synthesized implicit conversion method from the potentially
overloaded alternatives.
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With this commit, the number of :: allocations logged in total
after individually compiling each scala file in src/compiler
drops from 190,766,642 to 170,679,925. Twenty million fewer
colon-colons in the world, it's a start.
For some heavily used lists like List(List()) I made vals so
we can reuse the same one every time, e.g.
val ListOfNil = List(Nil)
The modifications in this patch were informed by logging call
frequency to List.apply and examining the heaviest users.
>> Origins tag 'listApply' logged 3041128 calls from 318 distinguished sources.
1497759 scala.reflect.internal.Definitions$ValueClassDefinitions$class.ScalaValueClasses(Definitions.scala:149)
173737 scala.reflect.internal.Symbols$Symbol.alternatives(Symbols.scala:1525)
148642 scala.tools.nsc.typechecker.SuperAccessors$SuperAccTransformer.transform(SuperAccessors.scala:306)
141676 scala.tools.nsc.transform.SpecializeTypes$$anonfun$scala$tools$nsc$transform$SpecializeTypes$$specializedOn$3.apply(SpecializeTypes.scala:114)
69049 scala.tools.nsc.transform.LazyVals$LazyValues$$anonfun$1.apply(LazyVals.scala:79)
62854 scala.tools.nsc.transform.SpecializeTypes.specializedTypeVars(SpecializeTypes.scala:427)
54781 scala.tools.nsc.typechecker.SuperAccessors$SuperAccTransformer.transform(SuperAccessors.scala:293)
54486 scala.reflect.internal.Symbols$Symbol.newSyntheticValueParams(Symbols.scala:334)
53843 scala.tools.nsc.backend.icode.Opcodes$opcodes$CZJUMP.<init>(Opcodes.scala:562)
... etc.
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mostly removes [Eugene] marks that I left back then and reviews related code
some of those tokens got left in place, because I don't know to how fix them
without imposing risks on 2.10.0
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These are the regexp replacements performed:
Sxcala
-> Scala
Copyright (\d*) LAMP/EPFL
-> Copyright $1-2012 LAMP/EPFL
Copyright (\d*)-(\d*)(,?) LAMP/EPFL
-> Copyright $1-2012 LAMP/EPFL
Copyright (\d*)-(\d*) Scala Solutions and LAMP/EPFL
-> Copyright $1-2012 Scala Solutions and LAMP/EPFL
\(C\) (\d*)-(\d*) LAMP/EPFL
-> (C) $1-2012 LAMP/EPFL
Copyright \(c\) (\d*)-(\d*)(.*?)EPFL
-> Copyright (c) $1-2012$3EPFL
The last one was needed for two HTML-ified copyright notices.
Here's the summarized diff:
Created using
```
git diff -w | grep ^- | sort | uniq | mate
git diff -w | grep ^+ | sort | uniq | mate
```
```
- <div id="footer">Scala programming documentation. Copyright (c) 2003-2011 <a href="http://www.epfl.ch" target="_top">EPFL</a>, with contributions from <a href="http://typesafe.com" target="_top">Typesafe</a>.</div>
- copyright.string=Copyright 2002-2011, LAMP/EPFL
- <meta name="Copyright" content="(C) 2002-2011 LAMP/EPFL"/>
- * Copyright 2002-2011 LAMP/EPFL
- * Copyright 2004-2011 LAMP/EPFL
- * Copyright 2005 LAMP/EPFL
- * Copyright 2005-2011 LAMP/EPFL
- * Copyright 2006-2011 LAMP/EPFL
- * Copyright 2007 LAMP/EPFL
- * Copyright 2007-2011 LAMP/EPFL
- * Copyright 2009-2011 Scala Solutions and LAMP/EPFL
- * Copyright 2009-2011 Scxala Solutions and LAMP/EPFL
- * Copyright 2010-2011 LAMP/EPFL
- * Copyright 2012 LAMP/EPFL
-# Copyright 2002-2011, LAMP/EPFL
-* Copyright 2005-2011 LAMP/EPFL
-/* NSC -- new Scala compiler -- Copyright 2007-2011 LAMP/EPFL */
-rem # Copyright 2002-2011, LAMP/EPFL
```
```
+ <div id="footer">Scala programming documentation. Copyright (c) 2003-2012 <a href="http://www.epfl.ch" target="_top">EPFL</a>, with contributions from <a href="http://typesafe.com" target="_top">Typesafe</a>.</div>
+ copyright.string=Copyright 2002-2012 LAMP/EPFL
+ <meta name="Copyright" content="(C) 2002-2012 LAMP/EPFL"/>
+ * Copyright 2002-2012 LAMP/EPFL
+ * Copyright 2004-2012 LAMP/EPFL
+ * Copyright 2005-2012 LAMP/EPFL
+ * Copyright 2006-2012 LAMP/EPFL
+ * Copyright 2007-2012 LAMP/EPFL
+ * Copyright 2009-2012 Scala Solutions and LAMP/EPFL
+ * Copyright 2010-2012 LAMP/EPFL
+ * Copyright 2011-2012 LAMP/EPFL
+# Copyright 2002-2012 LAMP/EPFL
+* Copyright 2005-2012 LAMP/EPFL
+/* NSC -- new Scala compiler -- Copyright 2007-2012 LAMP/EPFL */
+rem # Copyright 2002-2012 LAMP/EPFL
```
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1) Removed unnecessary (i.e. implementable with pattern matching) type APIs.
2) Renamed isHigherKinded to takesTypeArgs making it easier to understand.
2) typeParams and resultType have been moved from MethodType to MethodSymbol
Strictly speaking they are superfluous, but they are used very often.
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This brought to light that Name extends (Int => Char), and
that small convenience was not paying for itself. I updated
the places taking advantage of it to use Name#charAt.
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This protects everyone from the confusion caused by stuff like this:
https://issues.scala-lang.org/browse/SI-5884
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This is the first step of factoring out scala-reflect.jar.
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All tags and reflection-related stuff requires a prefix,
be it scala.reflect for simple tags (ArrayTags and ClassTags),
or scala.reflect.basis/scala.reflect.runtime.universe for type tags.
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This change is made to be consistent with JavaMirrors.
And, in my opinion, a technology-neutral term is better here.
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A must read: "SIP: Scala Reflection":
https://docs.google.com/document/d/1Z1VhhNPplbUpaZPIYdc0_EUv5RiGQ2X4oqp0i-vz1qw/edit
Highlights:
* Architecture has undergone a dramatic rehash.
* Universes and mirrors are now separate entities:
universes host reflection artifacts (trees, symbols, types, etc),
mirrors abstract loading of those artifacts (e.g. JavaMirror loads stuff
using a classloader and annotation unpickler, while GlobalMirror uses
internal compiler classreader to achieve the same goal).
* No static reflection mirror is imposed on the user.
One is free to choose between lightweight mirrors and full-blown
classloader-based mirror (read below).
* Public reflection API is split into scala.reflect.base and scala.reflect.api.
The former represents a minimalistic snapshot that is exactly enough to
build reified trees and types. To build, but not to analyze - everything smart
(for example, getting a type signature) is implemented in scala.reflect.api.
* Both reflection domains have their own universe: scala.reflect.basis and
scala.reflect.runtime.universe. The former is super lightweight and doesn't
involve any classloaders, while the latter represents a stripped down compiler.
* Classloader problems from 2.10.0-M3 are solved.
* Exprs and type tags are now bound to a mirror upon creation.
* However there is an easy way to migrate exprs and type tags between mirrors
and even between universes.
* This means that no classloader is imposed on the user of type tags and exprs.
If one doesn't like a classloader that's there (associated with tag's mirror),
one can create a custom mirror and migrate the tag or the expr to it.
* There is a shortcut that works in most cases. Requesting a type tag from
a full-blown universe will create that tag in a mirror that corresponds to
the callsite classloader aka `getClass.getClassLoader`. This imposes no
obligations on the programmer, since Type construction is lazy, so one
can always migrate a tag into a different mirror.
Migration notes for 2.10.0-M3 users:
* Incantations in Predef are gone, some of them have moved to scala.reflect.
* Everything path-dependent requires implicit prefix (for example, to refer
to a type tag, you need to explicitly specify the universe it belongs to,
e.g. reflect.basis.TypeTag or reflect.runtime.universe.TypeTag).
* ArrayTags have been removed, ConcreteTypeTag have been renamed to TypeTags,
TypeTags have been renamed to AbsTypeTags. Look for the reasoning in the
nearby children of this commit. Why not in this commit? Scroll this message
to the very bottom to find out the reason.
* Some of the functions have been renamed or moved around.
The rule of thumb is to look for anything non-trivial in scala.reflect.api.
Some of tree build utils have been moved to Universe.build.
* staticModule and staticClass have been moved from universes to mirrors
* ClassTag.erasure => ClassTag.runtimeClass
* For the sake of purity, type tags no longer have erasures.
Use multiple context bounds (e.g. def foo[T: ru.TypeTag : ClassTag](...) = ...)
if you're interested in having both erasures and types for type parameters.
* reify now rolls back macro applications.
* Runtime evaluation is now explicit, requires import scala.tools.reflect.Eval
and scala-compiler.jar on the classpath.
* Macro context now has separate universe and mirror fields.
* Most of the useful stuff is declared in c.universe,
so be sure to change your "import c.universe._" to "import c.mirror._".
* Due to the changes in expressions and type tags, their regular factories
are now really difficult to use. We acknowledge that macro users need to
frequently create exprs and tags, so we added old-style factories to context.
Bottom line: almost always prepend Expr(...)/TypeTag(...) with "c.".
* Expr.eval has been renamed to Expr.splice.
* Expr.value no longer splices (it can still be used to express cross-stage
path-dependent types as specified in SIP-16).
* c.reifyTree now has a mirror parameter that lets one customize the initial
mirror the resulting Expr will be bound to. If you provide EmptyTree, then
the reifier will automatically pick a reasonable mirror (callsite classloader
mirror for a full-blown universe and rootMirror for a basis universe).
Bottom line: this parameter should be EmptyTree in 99% of cases.
* c.reifyErasure => c.reifyRuntimeClass.
Known issues:
* API is really raw, need your feedback.
* All reflection artifacts are now represented by abstract types.
This means that pattern matching against them will emit unchecked warnings.
Adriaan is working on a patch that will fix that.
WARNING, FELLOW CODE EXPLORER! You have entered a turbulence zone.
For this commit and its nearby parents and children
tests are not guaranteed to work. Things get back to normal only after
the "repairs the tests after the refactoring spree" commit.
Why so weird? These twentish changesets were once parts of a humongous blob,
which spanned 1200 files and 15 kLOC. I did my best to split up the blob,
so that the individual parts of the code compile and make sense in isolation.
However doing the same for tests would be too much work.
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New this week, on SCALA.
Implicit class: "Spin me up an implicit method with my name."
Value class: "I need a companion object, pronto."
Narrator: "All was well with this arrangement... UNTIL."
What happens when these two wacky SIPs get together in the very
same class? You'll laugh until, eventually, you cry! Weeknights
at 9:30pm, only on SCALA.
Closes SI-5667.
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* all usages of ClassManifest and Manifest are replaced with tags
* all manifest tests are replaced with tag tests
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feature clean.
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Implements SIP 16: Self-cleaning macros: http://bit.ly/wjjXTZ
Features:
* Macro defs
* Reification
* Type tags
* Manifests aliased to type tags
* Extended reflection API
* Several hundred tests
* 1111 changed files
Not yet implemented:
* Reification of refined types
* Expr.value splicing
* Named and default macro expansions
* Intricacies of interaction between macros and implicits
* Emission of debug information for macros (compliant with JSR-45)
Dedicated to Yuri Alekseyevich Gagarin
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And eliminating redundancy. Reduced gratuitous usage of typeConstructor
on symbols which don't have type parameters.
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One leads to the other.
Easing some more specific typing into Symbols.
Getting a handle on when where and how people rename
symbols to suit their fancies.
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Also trimmed some cruft which had accrued in recent work.
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I swear this change didn't work last time I was in this neighborhood.
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Tried to paint a picture of how one might synthesize an implicit
method to accompany an implicit class.
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(Looks like there is more range position breakage yet, but
this gets the outermost layer.)
Channeling my struggles into a slightly easier future.
% scalac -Ypos-debug -d /tmp ./src/library/scala/Predef.scala
./src/library/scala/Predef.scala:222: warning: Positioned tree has unpositioned child in phase extmethods
def x = __resultOfEnsuring
^
parent: #7109 line 222 Select // (value __resultOfEnsuring in class Ensuring)
child: #7108 Ident // (value $this)
./src/library/scala/Predef.scala:258: warning: Positioned tree has unpositioned child in phase extmethods
def x = __leftOfArrow
^
parent: #7280 line 258 Select // (value __leftOfArrow in class ArrowAssoc)
child: #7279 Ident // (value $this)
two warnings found
Or try this to really see some output:
% scalac -Yrangepos -Ypos-debug
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Removed all the trailing whitespace to make eugene happier.
Will try to keep it that way by protecting at the merge level.
Left the tabs in place because they can't be uniformly changed
to spaces, some are 2, some are 4, some are 8, whee.
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Quieting things down. Fixed some things revealed by quieter
logs, like forwarders being generated for superaccessors.
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It's a lot like the last one. I also found trees being
duplicated before being sent to the tree copier. Looks like
xerox has gotten a mole in here. Trust no one.
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There is a window of danger when multiple related elements are
being typed where something which is conceptually one thing can
slip into two things, and those two things can be incompatible
with one another. Less mysteriously, c478eb770d fixed this:
def f = { object Bob ; Bob } ; val g = f
But, it did not fix this:
def f = { case class Bob() ; Bob } ; val g = f
See test case pos/existentials-harmful.scala for an "in the wild"
code example fixed by this commit.
The root of the problem was that the getter and the field would each
independently derive the same existential type to describe Bob, but
those existentials were not the same as one another.
This has been the most elusive bug I have ever fixed. I want to cry when
I think of how much time I've put into it over the past half decade or
so. Unfortunately the way the repl works it is particularly good at
eliciting those grotesque found/required error messages and so I was
never able to let the thing go.
There is still a cosmetic issue (from the last commit really) where
compound types wind up with repeated parents.
Closes SI-1195, SI-1201.
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given moment (instead of throwing type errors). This avoids previous problems where we were creating fake error trees in some incorrect places like in type completers in Namers etc. Implicits relied heavily on type errors being thrown but performance should stay the same due to some explicit checks/returns.
Some of the problems involved how ambiguous error messages were collected/reported because it was very random (similarly for divergent implicits). This should be more explicit now. Reduced the number of unnecessary cyclic references being thrown (apart from those in Symbols/Types which don't have a context and need to stay for now as is).
Review by @paulp, @odersky.
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There are too many potential optimizations unavailable to us due to the
lack of bright lines among different kinds of symbols. For instance the
difference between a TypeSymbol which represents a type alias and one
which represents an abstract type is only whether the DEFERRED flag
is set. This creates issues.
1) There are many (many) places where tests are performed on every symbol
which could be done more efficiently and (especially) more verifiably
correctly with polymorphism.
2) TypeRefs based on those symbols are also checking that flag
constantly, in perpetuity. A symbol created as an alias is never (to the
best of my knowledge) going to intentionally morph into one representing
an abstract type, nor vice versa.
3) One has no guarantees, because anyone can set or reset the DEFERRED
flag at any time.
So tackling more than one problem at once herein:
1) I created canonical symbol creation points which take the flags as
an argument, so that there can be a difference between initializing a
symbol's flags and setting/resetting them at arbitrary times.
2) I structured all the symbol creators to take arguments in the
same order, which is:
def newXXX(name: Name, ..., pos: Position = NoPosition, flags: Long = 0L)
(Where "..." is for those symbols which require something
beyond the name to create, such as a TypeSkolem's origin.)
The name is first because it's the only always required argument.
I left but deprecated the variations which take (pos, name).
3) I created subclasses of TypeRef based on the information which
should be stable from creation time onward:
- args or no args?
- abstract type, type alias, or class?
2x3 == 6 and that's how many subclasses of TypeRef there are now. So
now, for example, every TypeRef doesn't have to carry null symInfoCache
and thisInfoCache fields for the benefit of the minority which use them.
I still intend to realize the gain possible once we can evade the fields
for pre and args without losing pattern matcher efficiency.
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Several large helpings of tedium later, fewer strings are being
discarded like so much refuse. Some names now cache a String, but only
"named Names", so it's not very many and they pay for themselves pretty
quickly. Many fewer name-related implicit conversions now taking place.
A number of efficiency related measures.
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Streamlining some of our more common operations.
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Discovered expensive flag operations being performed on the
wrong side of the only-when-logging by-name argument.
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Took a more ambitious swing based on input from martin. Eliminated
the external map and gave annotations a more useful inheritance
hierarchy. Eliminated AnnotationInfoBase and made LazyAnnotationInfo an
AnnotationInfo (just like LazyType is a Type.) Review by odersky.
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It represents a lot of work because the mutation flies fast and furious
and you can't even blink at these things without upsetting them. They're
a little hardier now, or at least we stand a better chance of changing
them. Open season on review.
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Starting to see a glimmer of the other side now. I nudged a few things
into more sensible places. No review.
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