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Explicitly upcast intermediate result to aid program elaboration #230

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Jul 10, 2023
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Explicitly upcast intermediate result to aid program elaboration #230

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6 changes: 5 additions & 1 deletion core/src/main/scala/weaponregex/parser/ParserJVM.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -89,7 +89,11 @@ class ParserJVM private[parser] (pattern: String) extends Parser(pattern) {
* `"[abc]"`
*/
override def charClass[A: P]: P[CharacterClass] =
Indexed("[" ~ "^".!.? ~ (charClassIntersection.rep(exactly = 1) | classItem.rep(minCharClassItem)) ~ "]")
Indexed(
"[" ~ "^".!.? ~ ((charClassIntersection.rep(exactly = 1): P[Seq[RegexTree]]) | classItem.rep(
minCharClassItem
)) ~ "]"
)
.map { case (loc, (hat, nodes)) => CharacterClass(nodes, loc, isPositive = hat.isEmpty) }

/** Intermediate parsing rule for special construct tokens which can parse either `namedGroup`, `nonCapturingGroup`,
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