Scala example source code file (StringOps.scala)

This example Scala source code file (StringOps.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

anyval, char, int, string, stringlike, stringops, wrappedstring

The StringOps.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package immutable

import mutable.StringBuilder

/**
 *  This class serves as a wrapper providing `String`s with all the operations
 *  found in indexed sequences. Where needed, instances of `String` object
 *  are implicitly converted into this class.
 *
 *  The difference between this class and `WrappedString` is that calling transformer
 *  methods such as `filter` and `map` will yield a `String` object, whereas a
 *  `WrappedString` will remain a `WrappedString`.
 *
 *  @param repr     the actual representation of this string operations object.
 *
 *  @since 2.8
 *  @define Coll `String`
 *  @define coll string
 */
final class StringOps(override val repr: String) extends AnyVal with StringLike[String] {

  override protected[this] def thisCollection: WrappedString = new WrappedString(repr)
  override protected[this] def toCollection(repr: String): WrappedString = new WrappedString(repr)

  /** Creates a string builder buffer as builder for this class */
  override protected[this] def newBuilder = StringBuilder.newBuilder

  override def apply(index: Int): Char = repr charAt index
  override def slice(from: Int, until: Int): String = {
    val start = if (from < 0) 0 else from
    if (until <= start || start >= repr.length)
      return ""

    val end = if (until > length) length else until
    repr.substring(start, end)
  }
  override def toString = repr
  override def length = repr.length

  def seq = new WrappedString(repr)
}