Could not find proxy for case val x1: fastparse.ParsingRun in List(value x1, method $anonfun$expression$2, method rec$macro$22$1, method expression, class FastParseMacroBug, package <empty>, package <root>) (currentOwner= value preLhsIndex$macro$2 ) #217
Comments
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Workaround: introduce a new method for the |
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I hit this same issue (v2.2.4). Thanks for the workaround @aborg0 ! Here's my scenario: // doesn't work
def parseInt[_: P]: P[Int] =
CharsWhileIn("0-9").rep.!.flatMapX { str =>
Try(str.toInt) match {
case Success(i) => Pass(i)
case _ => Fail
}
}// works
def parseInt[_: P]: P[Int] = {
def parseIntStr = CharsWhileIn("0-9").rep.!
parseIntStr.flatMapX { str =>
Try(str.toInt) match {
case Success(i) => Pass(i)
case _ => Fail
}
}
} |
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I get the same issue, thanks for the workarounds! |
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Code to reproduce with fastparse 2.1.0:
It compile without
flatMap:and also compiles without the inner repeats:
Full error message:
Scastie reproduction: https://scastie.scala-lang.org/KTzjwsYsQLyccDCG6gZVgA
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