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Parse Function arity without throwing exceptions #2694

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merged 1 commit into from
Jun 7, 2017
Merged

Parse Function arity without throwing exceptions #2694

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11 changes: 7 additions & 4 deletions compiler/src/dotty/tools/dotc/core/NameOps.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -190,10 +190,13 @@ object NameOps {

/** Parsed function arity for function with some specific prefix */
private def functionArityFor(prefix: String): Int = {
if (name.startsWith(prefix))
try name.toString.substring(prefix.length).toInt
catch { case _: NumberFormatException => -1 }
else -1
if (name.startsWith(prefix)) {
val suffix = name.toString.substring(prefix.length)
if (suffix.matches("\\d+"))
suffix.toInt
else
-1
} else -1
}

/** The name of the generic runtime operation corresponding to an array operation */
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