Add StringOps from scala-reflect

Author: smarter

compiler/src/dotty/tools/dotc/parsing/SymbolicXMLBuilder.scala

@@ -10,7 +10,7 @@ import Names._, StdNames._, ast.Trees._, ast.{tpd, untpd}
 import Symbols._, Contexts._
 import util.Positions._
 import Parsers.Parser
-import scala.reflect.internal.util.StringOps.splitWhere
+import util.StringOps.splitWhere
 import scala.language.implicitConversions
 
 /** This class builds instance of `Tree` that represent XML.

compiler/src/dotty/tools/dotc/util/StringOps.scala

@@ -0,0 +1,22 @@
+/* NSC -- new Scala compiler
+ * Copyright 2002-2013 LAMP/EPFL
+ * @author  Martin Odersky
+ */
+
+package dotty.tools
+package dotc
+package util
+
+/** This object provides utility methods to extract elements
+ *  from Strings.
+ *
+ *  This was adapted from https://github.com/scala/scala/blob/2.11.x/src/reflect/scala/reflect/internal/util/StringOps.scala
+ */
+object StringOps {
+  def splitWhere(str: String, f: Char => Boolean, doDropIndex: Boolean = false): Option[(String, String)] =
+    splitAt(str, str indexWhere f, doDropIndex)
+
+  def splitAt(str: String, idx: Int, doDropIndex: Boolean = false): Option[(String, String)] =
+    if (idx == -1) None
+    else Some((str take idx, str drop (if (doDropIndex) idx + 1 else idx)))
+}

compiler/src/dotty/tools/io/ClassPath.scala

@@ -6,9 +6,9 @@
 package dotty.tools
 package io
 
+import dotc.util.StringOps.splitWhere
 import java.net.URL
 import scala.collection.{ mutable, immutable }
-import scala.reflect.internal.util.StringOps.splitWhere
 import File.pathSeparator
 import java.net.MalformedURLException
 import Jar.isJarOrZip