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docs: Add a comment to pathTo mentioning that it might return errorTermTree #15420

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prolativ merged 1 commit into from
Jun 13, 2022
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docs: Add a comment to pathTo mentioning that it might return errorTermTree #15420

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5 changes: 5 additions & 0 deletions compiler/src/dotty/tools/dotc/interactive/Interactive.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,11 @@ object Interactive {
/** The reverse path to the node that closest encloses position `pos`,
* or `Nil` if no such path exists. If a non-empty path is returned it starts with
* the tree closest enclosing `pos` and ends with an element of `trees`.
*
* Note that if the given `pos` points out places for incomplete parses,
* this method returns `errorTermTree` (`Literal(Consotant(null)`).
*
* @see https://github.com/lampepfl/dotty/issues/15294
*/
def pathTo(trees: List[SourceTree], pos: SourcePosition)(using Context): List[Tree] =
pathTo(trees.map(_.tree), pos.span)
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