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author | Paul Phillips <paulp@improving.org> | 2011-11-19 06:59:19 +0000 |
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committer | Paul Phillips <paulp@improving.org> | 2011-11-19 06:59:19 +0000 |
commit | 334872e33be8385678697f3d670c8102d38cdca7 (patch) | |
tree | d89531734d6c57e0dcd2eb7bd934e8beae888633 /src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala | |
parent | 7eb6f102e8e3bf90319e0339938d7e6eb5aaea43 (diff) | |
download | scala-334872e33be8385678697f3d670c8102d38cdca7.tar.gz scala-334872e33be8385678697f3d670c8102d38cdca7.tar.bz2 scala-334872e33be8385678697f3d670c8102d38cdca7.zip |
Bringing a bit of order to symbol substitution.
Painstakingly winnowed out the most frequently duplicated code sequences
related to symbol cloning and substitution. Created canonical methods to
perform these actions and documented them. Key methods include:
def createFromClonedSymbols[T](syms: List[Symbol], tpe: Type)(creator: (List[Symbol], Type) => T): T
def deriveSymbols(syms: List[Symbol], symFn: Symbol => Symbol): List[Symbol]
def deriveType(syms: List[Symbol], symFn: Symbol => Symbol)(tpe: Type): Type
Many example usages enclosed with commit.
I did lots of timing tests, I find no material difference before and
after. Actually I won by four seconds in this incarnation:
Before - Total time: 7 minutes 55 seconds
After - Total time: 7 minutes 51 seconds
Review by moors.
Diffstat (limited to 'src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala')
-rw-r--r-- | src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala index 01b1882481..7dc9b25015 100644 --- a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala +++ b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala @@ -1230,9 +1230,7 @@ abstract class ClassfileParser { class LazyAliasType(alias: Symbol) extends LazyType { override def complete(sym: Symbol) { - alias.initialize - val tparams1 = cloneSymbols(alias.typeParams) - sym.setInfo(typeFun(tparams1, alias.tpe.substSym(alias.typeParams, tparams1))) + sym setInfo createFromClonedSymbols(alias.initialize.typeParams, alias.tpe)(typeFun) } } |