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Scala example source code file (TypingTransformers.scala)
The Scala TypingTransformers.scala source code/* NSC -- new Scala compiler * Copyright 2005-2011 LAMP/EPFL * @author Martin Odersky */ package scala.tools.nsc package transform import scala.collection.{ mutable, immutable } /** A base class for transforms. * A transform contains a compiler phase which applies a tree transformer. */ trait TypingTransformers { val global: Global import global._ abstract class TypingTransformer(unit: CompilationUnit) extends Transformer { var localTyper: analyzer.Typer = if (phase.erasedTypes) erasure.newTyper(erasure.rootContext(unit, EmptyTree, true)).asInstanceOf[analyzer.Typer] else analyzer.newTyper(analyzer.rootContext(unit, EmptyTree, true)) protected var curTree: Tree = _ protected def typedPos(pos: Position)(tree: Tree) = localTyper typed { atPos(pos)(tree) } /** a typer for each enclosing class */ val typers: mutable.Map[Symbol, analyzer.Typer] = new mutable.HashMap override def atOwner[A](owner: Symbol)(trans: => A): A = atOwner(curTree, owner)(trans) def atOwner[A](tree: Tree, owner: Symbol)(trans: => A): A = { val savedLocalTyper = localTyper // println("transformer atOwner: " + owner + " isPackage? " + owner.isPackage) localTyper = localTyper.atOwner(tree, if (owner.isModule) owner.moduleClass else owner) typers += Pair(owner, localTyper) val result = super.atOwner(owner)(trans) localTyper = savedLocalTyper typers -= owner result } override def transform(tree: Tree): Tree = { curTree = tree tree match { case Template(_, _, _) => // enter template into context chain atOwner(currentOwner) { super.transform(tree) } case PackageDef(_, _) => atOwner(tree.symbol) { super.transform(tree) } case _ => super.transform(tree) } } } } Other Scala examples (source code examples)Here is a short list of links related to this Scala TypingTransformers.scala source code file: |
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