45 lines
1.4 KiB
Scala
45 lines
1.4 KiB
Scala
package examples.parsing
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import scala.util.parsing.combinator1.syntactical.StandardTokenParsers
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object JSON extends StandardTokenParsers {
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lexical.delimiters += ("{", "}", "[", "]", ":", ",")
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lexical.reserved += ("null", "true", "false")
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def obj : Parser[Any] = "{" ~ repsep(member, ",") ~ "}"
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def arr : Parser[Any] = "[" ~ repsep(value, ",") ~ "]"
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def member: Parser[Any] = ident ~ ":" ~ value
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def value : Parser[Any] = ident | numericLit | obj | arr |
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"null" | "true" | "false"
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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(value)(tokens))
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}
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}
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object JSON1 extends StandardTokenParsers {
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lexical.delimiters += ("{", "}", "[", "]", ":", ",")
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lexical.reserved += ("null", "true", "false")
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def obj: Parser[Map[String, Any]] =
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"{" ~> repsep(member, ",") <~ "}" ^^ (Map() ++ _)
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def arr: Parser[List[Any]] =
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"[" ~> repsep(value, ",") <~ "]"
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def member: Parser[(String, Any)] =
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ident ~ ":" ~ value ^^ { case name ~ ":" ~ value => (name -> value) }
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def value: Parser[Any] =
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ident | numericLit ^^ (_.toInt) | obj | arr |
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"null" ^^^ null | "true" ^^^ true | "false" ^^^ false
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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(value)(tokens))
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}
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}
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