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package scala.tools.nsc
package ast
import scala.tools.nsc.util.{ SourceFile, Position, OffsetPosition, NoPosition }
trait Positions extends scala.reflect.internal.Positions {
self: Global =>
def rangePos(source: SourceFile, start: Int, point: Int, end: Int) =
new OffsetPosition(source, point)
def validatePositions(tree: Tree) {}
// [Eugene] disabling this for now. imo it doesn't justify pollution of the public API
// override def _checkSetAnnotation(tree: Tree, annot: TreeAnnotation): Unit = {
// if (tree.pos != NoPosition && tree.pos != annot.pos) debugwarn("Overwriting annotation "+ tree.annotation +" of tree "+ tree +" with annotation "+ annot)
// // if ((tree.annotation.isInstanceOf[scala.tools.nsc.util.Position] || !annot.isInstanceOf[scala.tools.nsc.util.Position]) && tree.isInstanceOf[Block])
// // println("Updating block from "+ tree.annotation +" to "+ annot)
// }
class ValidatingPosAssigner extends PosAssigner {
var pos: Position = _
override def traverse(t: Tree) {
if (t eq EmptyTree) ()
else if (t.pos == NoPosition) super.traverse(t setPos pos)
else if (globalPhase.id <= currentRun.picklerPhase.id) {
// When we prune due to encountering a position, traverse the
// pruned children so we can warn about those lacking positions.
t.children foreach { c =>
if ((c eq EmptyTree) || (c eq emptyValDef)) ()
else if (c.pos == NoPosition) {
reporter.warning(t.pos, " Positioned tree has unpositioned child in phase " + globalPhase)
inform("parent: " + treeSymStatus(t))
inform(" child: " + treeSymStatus(c) + "\n")
}
}
}
}
}
override protected[this] lazy val posAssigner: PosAssigner =
if (settings.Yrangepos.value && settings.debug.value || settings.Yposdebug.value) new ValidatingPosAssigner
else new DefaultPosAssigner
}
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