diff options
Diffstat (limited to 'src/compiler')
-rw-r--r-- | src/compiler/scala/tools/nsc/ast/Trees.scala | 1 | ||||
-rw-r--r-- | src/compiler/scala/tools/nsc/symtab/SymbolTrackers.scala | 62 |
2 files changed, 44 insertions, 19 deletions
diff --git a/src/compiler/scala/tools/nsc/ast/Trees.scala b/src/compiler/scala/tools/nsc/ast/Trees.scala index ee5bb8dc93..90d1135517 100644 --- a/src/compiler/scala/tools/nsc/ast/Trees.scala +++ b/src/compiler/scala/tools/nsc/ast/Trees.scala @@ -107,6 +107,7 @@ trait Trees extends reflect.generic.Trees { self: SymbolTable => }) def shallowDuplicate: Tree = new ShallowDuplicator(tree) transform tree + def shortClass: String = tree.getClass.getName split "[.$]" last } private[scala] override def duplicateTree(tree: Tree): Tree = duplicator transform tree diff --git a/src/compiler/scala/tools/nsc/symtab/SymbolTrackers.scala b/src/compiler/scala/tools/nsc/symtab/SymbolTrackers.scala index aaa53c284a..870787a9ea 100644 --- a/src/compiler/scala/tools/nsc/symtab/SymbolTrackers.scala +++ b/src/compiler/scala/tools/nsc/symtab/SymbolTrackers.scala @@ -6,6 +6,8 @@ package scala.tools.nsc package symtab +import scala.collection.{ mutable, immutable } + /** Printing the symbol graph (for those symbols attached to an AST node) * after each phase. */ @@ -13,6 +15,9 @@ trait SymbolTrackers { val global: Global import global._ + private implicit lazy val TreeOrdering: Ordering[Tree] = + Ordering by (x => (x.shortClass, x.symbol)) + private implicit lazy val SymbolOrdering: Ordering[Symbol] = Ordering by (x => (x.kindString, x.name.toString)) @@ -31,28 +36,35 @@ trait SymbolTrackers { case class Change( added: Set[Symbol], removed: Set[Symbol], - owners: Map[Symbol, Symbol], // symbol -> previous owner - flags: Map[Symbol, Long] // symbol -> previous flags + trees: Map[Symbol, Set[Tree]], // symbol -> trees which proudly display it + owners: Map[Symbol, Symbol], // symbol -> previous owner + flags: Map[Symbol, Long] // symbol -> previous flags ) object SymbolTracker { def containsSymbol(t: Tree) = t.symbol != null && t.symbol != NoSymbol - def symbolsInUnit(unit: CompilationUnit): Set[Symbol] = { - if (unit.body == null) Set.empty[Symbol] - else unit.body filter containsSymbol map (_.symbol) toSet + // This is noise reduction only. + def dropSymbol(sym: Symbol) = sym.ownerChain exists (_ hasFlag Flags.SPECIALIZED) + + def symbolSnapshot(unit: CompilationUnit): Map[Symbol, Set[Tree]] = { + if (unit.body == null) Map() + else unit.body filter containsSymbol groupBy (_.symbol) mapValues (_.toSet) toMap } def apply(unit: CompilationUnit) = new SymbolTracker( - () => symbolsInUnit(unit) filterNot (_.ownerChain.exists(_ hasFlag Flags.SPECIALIZED)) + () => symbolSnapshot(unit) filterNot { case (k, _) => dropSymbol(k) } ) } - class SymbolTracker(sourceFn: () => Set[Symbol]) { + class SymbolTracker(snapshotFn: () => Map[Symbol, Set[Tree]]) { def flagsMask: Long = Flags.PrintableFlags - private var current = Set[Symbol]() - private var history = List[Change](Change(Set(), Set(), Map(), Map())) - private var prev = Set[Symbol]() + private var currentMap = Map[Symbol, Set[Tree]]() + private var prevMap = Map[Symbol, Set[Tree]]() + private def current = currentMap.keySet + private def prev = prevMap.keySet + + private var history = List[Change](Change(Set(), Set(), Map(), Map(), Map())) private var prevFlags = Map[Symbol, Long]() private var prevOwners = Map[Symbol, Symbol]() @@ -63,7 +75,6 @@ trait SymbolTrackers { private implicit def NodeOrdering: Ordering[Node] = Ordering by (_.root) private def ownersString(sym: Symbol, num: Int) = sym.ownerChain drop 1 take num mkString " -> " - private def allOwnersString(sym: Symbol) = sym.ownerChain mkString " -> " object Node { def nodes(syms: Set[Symbol]): List[Node] = { @@ -117,7 +128,7 @@ trait SymbolTrackers { " " + strs.filterNot(_ == "").mkString("[", " ", "]") case _ => if (masked == 0L) "" - else " " + Flags.flagsToString(masked) + else " (" + Flags.flagsToString(masked) + ")" } def symString(sym: Symbol) = ( sym + changedOwnerString + flagSummaryString @@ -137,7 +148,7 @@ trait SymbolTrackers { } def snapshot(): Unit = { - current = sourceFn() + currentMap = snapshotFn() val added = current filterNot prev val removed = prev filterNot current @@ -155,22 +166,35 @@ trait SymbolTrackers { (sym, old) }).toMap - val change = Change(added, removed, owners, flags) + val change = Change(added, removed, prevMap, owners, flags) - prev = current + prevMap = currentMap prevOwners = current map (s => (s, s.owner)) toMap; prevFlags = current map (s => (s, (s.flags & flagsMask))) toMap; history = change :: history } def show(): String = { val hierarchy = Node(current) - val removed = history.head.removed + val Change(added, removed, symMap, owners, flags) = history.head + def detailString(sym: Symbol) = { + val ownerString = sym.ownerChain splitAt 3 match { + case (front, back) => + val xs = if (back.isEmpty) front else front :+ "..." + xs mkString " -> " + } + val treeStrings = symMap(sym) map { t => + "%10s: %s".format(t.shortClass, t) + } + + ownerString :: treeStrings mkString "\n" + } + def removedString = (removed: List[Symbol]).zipWithIndex map { + case (t, i) => "(%2s) ".format(i + 1) + detailString(t) + } mkString "\n" "" + hierarchy + ( if (removed.isEmpty) "" - else removed map allOwnersString mkString ( - "\n\n!!! " + removed.size + " symbols vanished:\n", "\n", "" - ) + else "\n\n!!! %s symbols vanished:\n".format(removed.size) + removedString ) } } |