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Aug 31, 2018
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Update scala section in readme #167

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89bb62c
Indent scala code with 2 spaces
Philippus Aug 15, 2018
695279f
Use string interpolation
Philippus Aug 15, 2018
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24 changes: 11 additions & 13 deletions README.md
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@@ -1,5 +1,4 @@
scala-parser-combinators [<img src="https://img.shields.io/travis/scala/scala-parser-combinators.svg"/>](https://travis-ci.org/scala/scala-parser-combinators) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.11.svg?label=latest%20release%20for%202.11"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.11) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.12.svg?label=latest%20release%20for%202.12"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.12) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scala/scala-parser-combinators)
========================
# scala-parser-combinators [<img src="https://img.shields.io/travis/scala/scala-parser-combinators.svg"/>](https://travis-ci.org/scala/scala-parser-combinators) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.11.svg?label=latest%20release%20for%202.11"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.11) [<img src="https://img.shields.io/maven-central/v/org.scala-lang.modules/scala-parser-combinators_2.12.svg?label=latest%20release%20for%202.12"/>](http://search.maven.org/#search%7Cga%7C1%7Cg%3Aorg.scala-lang.modules%20a%3Ascala-parser-combinators_2.12) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/scala/scala-parser-combinators)

### Scala Standard Parser Combinator Library

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import scala.util.parsing.combinator._

case class WordFreq(word: String, count: Int) {
override def toString = "Word <" + word + "> " +
"occurs with frequency " + count
override def toString = s"Word <$word> occurs with frequency $count"
}

class SimpleParser extends RegexParsers {
def word: Parser[String] = """[a-z]+""".r ^^ { _.toString }
def number: Parser[Int] = """(0|[1-9]\d*)""".r ^^ { _.toInt }
def freq: Parser[WordFreq] = word ~ number ^^ { case wd ~ fr => WordFreq(wd,fr) }
def word: Parser[String] = """[a-z]+""".r ^^ { _.toString }
def number: Parser[Int] = """(0|[1-9]\d*)""".r ^^ { _.toInt }
def freq: Parser[WordFreq] = word ~ number ^^ { case wd ~ fr => WordFreq(wd,fr) }
}

object TestSimpleParser extends SimpleParser {
def main(args: Array[String]) = {
parse(freq, "johnny 121") match {
case Success(matched,_) => println(matched)
case Failure(msg,_) => println("FAILURE: " + msg)
case Error(msg,_) => println("ERROR: " + msg)
}
def main(args: Array[String]) = {
parse(freq, "johnny 121") match {
case Success(matched,_) => println(matched)
case Failure(msg,_) => println(s"FAILURE: $msg")
case Error(msg,_) => println(s"ERROR: $msg")
}
}
}
```

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