31 lines
852 B
Scala
31 lines
852 B
Scala
package examples.parsing
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import scala.util.parsing.combinator1.syntactical.StandardTokenParsers
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object ListParsers extends StandardTokenParsers {
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lexical.delimiters ++= List("(", ")", ",")
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def expr: Parser[Any] = "(" ~ exprs ~ ")" | ident | numericLit
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def exprs: Parser[Any] = expr ~ rep ("," ~ expr)
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def main(args: Array[String]) {
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val tokens = new lexical.Scanner(args(0))
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println(args(0))
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println(phrase(expr)(tokens))
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}
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}
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object ListParsers1 extends StandardTokenParsers {
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lexical.delimiters ++= List("(", ")", ",")
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def expr: Parser[Any] = "(" ~> exprs <~ ")" | ident | numericLit
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def exprs: Parser[List[Any]] = expr ~ rep ("," ~> expr) ^^ { case x ~ y => x :: y }
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def main(args: Array[String]) {
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val tokens = new lexical.Scanner(args(0))
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println(args(0))
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println(phrase(expr)(tokens))
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}
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}
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