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package dotty.tools
package dotc
package core
package tasty
import Contexts._, SymDenotations._, Symbols._
import dotty.tools.dotc.ast.tpd
import TastyUnpickler._, TastyBuffer._
import util.Positions._
import util.{SourceFile, NoSource}
import Annotations.Annotation
import core.Mode
import classfile.ClassfileParser
object DottyUnpickler {
/** Exception thrown if classfile is corrupted */
class BadSignature(msg: String) extends RuntimeException(msg)
class TreeSectionUnpickler(posUnpickler: Option[PositionUnpickler])
extends SectionUnpickler[TreeUnpickler]("ASTs") {
def unpickle(reader: TastyReader, tastyName: TastyName.Table) =
new TreeUnpickler(reader, tastyName, posUnpickler)
}
class PositionsSectionUnpickler extends SectionUnpickler[PositionUnpickler]("Positions") {
def unpickle(reader: TastyReader, tastyName: TastyName.Table) =
new PositionUnpickler(reader)
}
}
/** A class for unpickling Tasty trees and symbols.
* @param bytes the bytearray containing the Tasty file from which we unpickle
*/
class DottyUnpickler(bytes: Array[Byte]) extends ClassfileParser.Embedded {
import tpd._
import DottyUnpickler._
val unpickler = new TastyUnpickler(bytes)
private val posUnpicklerOpt = unpickler.unpickle(new PositionsSectionUnpickler)
private val treeUnpickler = unpickler.unpickle(new TreeSectionUnpickler(posUnpicklerOpt)).get
/** Enter all toplevel classes and objects into their scopes
* @param roots a set of SymDenotations that should be overwritten by unpickling
*/
def enter(roots: Set[SymDenotation])(implicit ctx: Context): Unit =
treeUnpickler.enterTopLevel(roots)
/** The unpickled trees, and the source file they come from. */
def body(implicit ctx: Context): List[Tree] = {
treeUnpickler.unpickle()
}
}
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