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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection
package immutable
import generic._
import mutable.{Builder, StringBuilder}
/**
* This class serves as a wrapper augmenting `String`s with all the operations
* found in indexed sequences.
*
* The difference between this class and `StringOps` is that calling transformer
* methods such as `filter` and `map` will yield an object of type `WrappedString`
* rather than a `String`.
*
* @param self a string contained within this wrapped string
*
* @since 2.8
* @define Coll `WrappedString`
* @define coll wrapped string
*/
class WrappedString(val self: String) extends AbstractSeq[Char] with IndexedSeq[Char] with StringLike[WrappedString] {
override protected[this] def thisCollection: WrappedString = this
override protected[this] def toCollection(repr: WrappedString): WrappedString = repr
/** Creates a string builder buffer as builder for this class */
override protected[this] def newBuilder = WrappedString.newBuilder
override def slice(from: Int, until: Int): WrappedString = {
val start = if (from < 0) 0 else from
if (until <= start || start >= repr.length)
return new WrappedString("")
val end = if (until > length) length else until
new WrappedString(repr.substring(start, end))
}
override def length = self.length
override def toString = self
}
/** A companion object for wrapped strings.
*
* @since 2.8
*/
object WrappedString {
implicit def canBuildFrom: CanBuildFrom[WrappedString, Char, WrappedString] = new CanBuildFrom[WrappedString, Char, WrappedString] {
def apply(from: WrappedString) = newBuilder
def apply() = newBuilder
}
def newBuilder: Builder[Char, WrappedString] = StringBuilder.newBuilder mapResult (x => new WrappedString(x))
}
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