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package dotty.tools.dotc
package core
package pickling
import Contexts._, Decorators._
import printing.Texts._
import TastyName._
import TastyUnpickler._
class TastyPrinter(bytes: Array[Byte])(implicit ctx: Context) {
val unpickler = new TastyUnpickler(bytes)
import unpickler.{tastyName, unpickle}
def nameToString(name: TastyName): String = name match {
case Simple(name) => name.toString
case Qualified(qual, name) => nameRefToString(qual) + "." + nameRefToString(name)
case Signed(original, params, result) =>
i"${nameRefToString(original)}@${params.map(nameRefToString)}%,%:${nameRefToString(result)}"
case Expanded(original) => nameRefToString(original) + "/EXPANDED"
case ModuleClass(original) => nameRefToString(original) + "/MODULECLASS"
case SuperAccessor(accessed) => nameRefToString(accessed) + "/SUPERACCESSOR"
case DefaultGetter(meth, num) => nameRefToString(meth) + "/DEFAULTGETTER" + num
}
def nameRefToString(ref: NameRef): String = nameToString(tastyName(ref))
def printNames() =
for ((name, idx) <- tastyName.contents.zipWithIndex)
println(f"$idx%4d: " + nameToString(name))
def printContents(): Unit = {
println("Names:")
printNames()
println("Trees:")
unpickle(new TreeUnpickler)
unpickle(new PositionUnpickler)
}
class TreeUnpickler extends SectionUnpickler[Unit]("ASTs") {
import PickleFormat._
def unpickle(reader: TastyReader, tastyName: TastyName.Table): Unit = {
import reader._
var indent = 0
def newLine() = print(f"\n ${index(currentAddr) - index(startAddr)}%5d:" + " " * indent)
def printNat() = print(" " + readNat())
def printName() = {
val idx = readNat()
print(" ") ;print(idx); print("["); print(nameRefToString(NameRef(idx))); print("]")
}
def printTree(): Unit = {
newLine()
val tag = readByte()
print(" ");print(astTagToString(tag))
indent += 2
if (tag >= firstLengthTreeTag) {
val len = readNat()
print(s"($len)")
val end = currentAddr + len
def printTrees() = until(end)(printTree())
tag match {
case IMPORTED =>
printName()
case RENAMED =>
printName(); printName()
case VALDEF | DEFDEF | TYPEDEF | TYPEPARAM | PARAM | NAMEDARG | SELFDEF | BIND | REFINEDtype =>
printName(); printTrees()
case RETURN =>
printNat(); printTrees()
case METHODtype | POLYtype =>
printTree()
until(end) { printName(); printTree() }
case PARAMtype =>
printNat(); printNat()
case _ =>
printTrees()
}
if (currentAddr != end) {
println(s"incomplete read, current = $currentAddr, end = $end")
skipTo(currentAddr)
}
}
else if (tag >= firstNatASTTreeTag) {
tag match {
case IDENT | SELECT | TERMREF | TYPEREF => printName()
case _ => printNat()
}
printTree()
}
else if (tag >= firstNatTreeTag)
tag match {
case TERMREFpkg | TYPEREFpkg | STRINGconst => printName()
case _ => printNat()
}
indent -= 2
}
println(i"start = ${reader.startAddr}, base = $base, current = $currentAddr, end = $endAddr")
println(s"${endAddr.index - startAddr.index} bytes of AST, base = $currentAddr")
while (!isAtEnd) {
printTree()
newLine()
}
}
}
class PositionUnpickler extends SectionUnpickler[Unit]("Positions") {
def unpickle(reader: TastyReader, tastyName: TastyName.Table): Unit = {
import reader._
def unpickleOffsets(edge: Edge): Unit = {
var lastOffset = 0
var lastAddr = 0
val length = readNat()
println(s"$length offset bytes")
val end = currentAddr + length
until(end) {
lastOffset += readInt()
lastAddr += readInt()
println(s"$lastOffset: $lastAddr")
}
}
unpickleOffsets(Edge.left)
unpickleOffsets(Edge.right)
}
}
}
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