Change infix method calls o m a to o.m(a).

build.sbt

@@ -93,7 +93,7 @@ lazy val xml = crossProject(JSPlatform, JVMPlatform, NativePlatform)
           file(jarPath)
             -> url("http://docs.oracle.com/javase/8/docs/api")
         )
-      } getOrElse {
+      }.getOrElse {
         // If everything fails, jam in Java 11 modules.
         Map(
           file("/modules/java.base")

jvm/src/test/scala-2.x/scala/xml/CompilerErrors.scala

@@ -197,12 +197,12 @@ class CompilerTesting {
 
   def expectXmlError(msg: String, code: String): Unit = {
     val errors: List[String] = xmlErrorMessages(msg, code)
-    assert(errors exists (_ contains msg), errors mkString "\n")
+    assert(errors.exists(_.contains(msg)), errors.mkString("\n"))
   }
 
   def expectXmlErrors(msgCount: Int, msg: String, code: String): Unit = {
     val errors: List[String] = xmlErrorMessages(msg, code)
-    val errorCount: Int = errors.count(_ contains msg)
-    assert(errorCount == msgCount, s"$errorCount occurrences of \'$msg\' found -- expected $msgCount in:\n${errors mkString "\n"}")
+    val errorCount: Int = errors.count(_.contains(msg))
+    assert(errorCount == msgCount, s"$errorCount occurrences of \'$msg\' found -- expected $msgCount in:\n${errors.mkString("\n")}")
   }
 }

jvm/src/test/scala/scala/xml/ReuseNodesTest.scala

@@ -19,7 +19,7 @@ object ReuseNodesTest {
 
   class OriginalTranformr(rules: RewriteRule*) extends RuleTransformer(rules:_*) {
     override def transform(ns: Seq[Node]): Seq[Node] = {
-      val xs: Seq[Seq[Node]] = ns.toStream map transform
+      val xs: Seq[Seq[Node]] = ns.toStream.map(transform)
       val (xs1: Seq[(Seq[Node], Node)], xs2: Seq[(Seq[Node], Node)]) = xs.zip(ns).span { case (x, n) => unchanged(n, x) }
 
       if (xs2.isEmpty) ns
@@ -30,7 +30,7 @@ object ReuseNodesTest {
 
   class ModifiedTranformr(rules: RewriteRule*) extends RuleTransformer(rules:_*) {
     override def transform(ns: Seq[Node]): Seq[Node] = {
-      val changed: Seq[Node] = ns flatMap transform
+      val changed: Seq[Node] = ns.flatMap(transform)
 
       if (changed.length != ns.length || changed.zip(ns).exists(p => p._1 != p._2)) changed
       else ns
@@ -93,7 +93,7 @@ class ReuseNodesTest {
         recursiveAssert(original.child,transformed.child)
       case _ =>
         assertSame(original, transformed)
-        // No need to check for children, node being immuatable
+        // No need to check for children, node being immutable
         // children can't be different if parents are referentially equal
     }
   }

jvm/src/test/scala/scala/xml/XMLTest.scala

@@ -1,6 +1,5 @@
 package scala.xml
 
-import language.postfixOps
 import org.junit.{Test => UnitTest}
 import org.junit.Assert.{assertEquals, assertFalse, assertTrue}
 import java.io.StringWriter
@@ -38,8 +37,8 @@ class XMLTestJVM {
 
     assertEquals(c, parsedxml11)
     assertEquals(parsedxml1, parsedxml11)
-    assertTrue(List(parsedxml1) sameElements List(parsedxml11))
-    assertTrue(Array(parsedxml1).toList sameElements List(parsedxml11))
+    assertTrue(List(parsedxml1).sameElements(List(parsedxml11)))
+    assertTrue(Array(parsedxml1).toList.sameElements(List(parsedxml11)))
 
     val x2: String = "<book><author>Peter Buneman</author><author>Dan Suciu</author><title>Data on ze web</title></book>"
     val x2p: Elem = XML.loadString(x2)
@@ -52,66 +51,66 @@ class XMLTestJVM {
 
   @UnitTest
   def xpath(): Unit = {
-    assertTrue(parsedxml1 \ "_" sameElements List(Elem(null, "world", e, sc)))
+    assertTrue((parsedxml1 \ "_").sameElements(List(Elem(null, "world", e, sc))))
 
-    assertTrue(parsedxml1 \ "world" sameElements List(Elem(null, "world", e, sc)))
+    assertTrue((parsedxml1 \ "world").sameElements(List(Elem(null, "world", e, sc))))
 
     assertTrue(
-      (parsedxml2 \ "_") sameElements List(
+      (parsedxml2 \ "_").sameElements(List(
         Elem(null, "book", e, sc,
           Elem(null, "author", e, sc, Text("Peter Buneman")),
           Elem(null, "author", e, sc, Text("Dan Suciu")),
           Elem(null, "title", e, sc, Text("Data on ze web"))),
         Elem(null, "book", e, sc,
           Elem(null, "author", e, sc, Text("John Mitchell")),
-          Elem(null, "title", e, sc, Text("Foundations of Programming Languages")))))
+          Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))))))
     assertTrue((parsedxml2 \ "author").isEmpty)
 
     assertTrue(
-      (parsedxml2 \ "book") sameElements List(
+      (parsedxml2 \ "book").sameElements(List(
         Elem(null, "book", e, sc,
           Elem(null, "author", e, sc, Text("Peter Buneman")),
           Elem(null, "author", e, sc, Text("Dan Suciu")),
           Elem(null, "title", e, sc, Text("Data on ze web"))),
         Elem(null, "book", e, sc,
           Elem(null, "author", e, sc, Text("John Mitchell")),
-          Elem(null, "title", e, sc, Text("Foundations of Programming Languages")))))
+          Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))))))
 
     assertTrue(
-      (parsedxml2 \ "_" \ "_") sameElements List(
+      (parsedxml2 \ "_" \ "_").sameElements(List(
         Elem(null, "author", e, sc, Text("Peter Buneman")),
         Elem(null, "author", e, sc, Text("Dan Suciu")),
         Elem(null, "title", e, sc, Text("Data on ze web")),
         Elem(null, "author", e, sc, Text("John Mitchell")),
-        Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))))
+        Elem(null, "title", e, sc, Text("Foundations of Programming Languages")))))
 
     assertTrue(
-      (parsedxml2 \ "_" \ "author") sameElements List(
+      (parsedxml2 \ "_" \ "author").sameElements(List(
         Elem(null, "author", e, sc, Text("Peter Buneman")),
         Elem(null, "author", e, sc, Text("Dan Suciu")),
-        Elem(null, "author", e, sc, Text("John Mitchell"))))
+        Elem(null, "author", e, sc, Text("John Mitchell")))))
 
     assertTrue((parsedxml2 \ "_" \ "_" \ "author").isEmpty)
   }
 
   @UnitTest
   def xpathDESCENDANTS(): Unit = {
     assertTrue(
-      (parsedxml2 \\ "author") sameElements List(
+      (parsedxml2 \\ "author").sameElements(List(
         Elem(null, "author", e, sc, Text("Peter Buneman")),
         Elem(null, "author", e, sc, Text("Dan Suciu")),
-        Elem(null, "author", e, sc, Text("John Mitchell"))))
+        Elem(null, "author", e, sc, Text("John Mitchell")))))
 
     assertTrue(
-      (parsedxml2 \\ "title") sameElements List(
+      (parsedxml2 \\ "title").sameElements(List(
         Elem(null, "title", e, sc, Text("Data on ze web")),
-        Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))))
+        Elem(null, "title", e, sc, Text("Foundations of Programming Languages")))))
 
     assertEquals("<book><author>Peter Buneman</author><author>Dan Suciu</author><title>Data on ze web</title></book>",
       (parsedxml2 \\ "book") { (n: Node) => (n \ "title") xml_== "Data on ze web" }.toString)
 
     assertTrue(
-      (NodeSeq.fromSeq(List(parsedxml2)) \\ "_") sameElements List(
+      (NodeSeq.fromSeq(List(parsedxml2)) \\ "_").sameElements(List(
         Elem(null, "bib", e, sc,
           Elem(null, "book", e, sc,
             Elem(null, "author", e, sc, Text("Peter Buneman")),
@@ -131,7 +130,7 @@ class XMLTestJVM {
           Elem(null, "author", e, sc, Text("John Mitchell")),
           Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))),
         Elem(null, "author", e, sc, Text("John Mitchell")),
-        Elem(null, "title", e, sc, Text("Foundations of Programming Languages"))))
+        Elem(null, "title", e, sc, Text("Foundations of Programming Languages")))))
   }
 
   @UnitTest
@@ -196,7 +195,7 @@ class XMLTestJVM {
       // println("x = " + x)
       // println("y = " + y)
       // println("x equals y: " + (x equals y) + ", y equals x: " + (y equals x))
-      assertTrue((x equals y) && (y equals x))
+      assertTrue(x.equals(y) && y.equals(x))
       // println()
     }
   }
@@ -659,7 +658,7 @@ class XMLTestJVM {
     val parent: org.xml.sax.XMLReader = xercesInternal.newSAXParser.getXMLReader
     val filter: org.xml.sax.XMLFilter = new org.xml.sax.helpers.XMLFilterImpl(parent) {
       override def characters(ch: Array[Char], start: Int, length: Int): Unit = {
-        for (i <- 0 until length) if (ch(start+i) == 'a') ch(start+i) = 'b'
+        for (i <- 0.until(length)) if (ch(start+i) == 'a') ch(start+i) = 'b'
         super.characters(ch, start, length)
       }
     }

shared/src/main/scala/scala/xml/Comment.scala

@@ -39,5 +39,5 @@ case class Comment(commentText: String) extends SpecialNode {
    * Appends &quot;<!-- text -->&quot; to this string buffer.
    */
   override def buildString(sb: StringBuilder): StringBuilder =
-    sb append "<!--" append commentText append "-->"
+    sb.append("<!--").append(commentText).append("-->")
 }

shared/src/main/scala/scala/xml/Elem.scala

@@ -106,5 +106,5 @@ class Elem(
   /**
    * Returns concatenation of `text(n)` for each child `n`.
    */
-  override def text: String = (child map (_.text)).mkString
+  override def text: String = child.map(_.text).mkString
 }

shared/src/main/scala/scala/xml/Equality.scala

@@ -63,7 +63,7 @@ object Equality {
   }
   def compareBlithely(x1: AnyRef, x2: AnyRef): Boolean = {
     if (x1 == null || x2 == null)
-      return x1 eq x2
+      return x1.eq(x2)
 
     x2 match {
       case s: String => compareBlithely(x1, s)
@@ -108,9 +108,9 @@ trait Equality extends scala.Equals {
    */
   private def doComparison(other: Any, blithe: Boolean): Boolean = {
     val strictlyEqual: Boolean = other match {
-      case x: AnyRef if this eq x => true
-      case x: Equality            => (x canEqual this) && (this strict_== x)
-      case _                      => false
+      case x: AnyRef if this.eq(x) => true
+      case x: Equality             => (x canEqual this) && (this strict_== x)
+      case _                       => false
     }
 
     strictlyEqual || (blithe && compareBlithely(this, asRef(other)))

shared/src/main/scala/scala/xml/Group.scala

@@ -29,7 +29,7 @@ final case class Group(nodes: Seq[Node]) extends Node {
   }
 
   override def strict_==(other: Equality): Boolean = other match {
-    case Group(xs) => nodes sameElements xs
+    case Group(xs) => nodes.sameElements(xs)
     case _         => false
   }
 
@@ -39,7 +39,7 @@ final case class Group(nodes: Seq[Node]) extends Node {
    * Since Group is very much a hack it throws an exception if you
    *  try to do anything with it.
    */
-  private def fail(msg: String): Nothing = throw new UnsupportedOperationException("class Group does not support method '%s'" format msg)
+  private def fail(msg: String): Nothing = throw new UnsupportedOperationException("class Group does not support method '%s'".format(msg))
 
   override def label: Nothing = fail("label")
   override def attributes: Nothing = fail("attributes")

shared/src/main/scala/scala/xml/MetaData.scala

@@ -29,25 +29,25 @@ object MetaData {
    */
   @tailrec
   def concatenate(attribs: MetaData, new_tail: MetaData): MetaData =
-    if (attribs eq Null) new_tail
-    else concatenate(attribs.next, attribs copy new_tail)
+    if (attribs.eq(Null)) new_tail
+    else concatenate(attribs.next, attribs.copy(new_tail))
 
   /**
    * returns normalized MetaData, with all duplicates removed and namespace prefixes resolved to
    *  namespace URIs via the given scope.
    */
   def normalize(attribs: MetaData, scope: NamespaceBinding): MetaData = {
     def iterate(md: MetaData, normalized_attribs: MetaData, set: Set[String]): MetaData = {
-      if (md eq Null) {
+      if (md.eq(Null)) {
         normalized_attribs
-      } else if (md.value eq null) {
+      } else if (md.value.eq(null)) {
         iterate(md.next, normalized_attribs, set)
       } else {
         val key: String = getUniversalKey(md, scope)
         if (set(key)) {
           iterate(md.next, normalized_attribs, set)
         } else {
-          md copy iterate(md.next, normalized_attribs, set + key)
+          md.copy(iterate(md.next, normalized_attribs, set + key))
         }
       }
     }
@@ -154,8 +154,8 @@ abstract class MetaData
 
   /** filters this sequence of meta data */
   override def filter(f: MetaData => Boolean): MetaData =
-    if (f(this)) copy(next filter f)
-    else next filter f
+    if (f(this)) copy(next.filter(f))
+    else next.filter(f)
 
   def reverse: MetaData =
     foldLeft(Null: MetaData) { (x, xs) =>
@@ -181,7 +181,7 @@ abstract class MetaData
    * Returns a Map containing the attributes stored as key/value pairs.
    */
   def asAttrMap: Map[String, String] =
-    (iterator map (x => (x.prefixedKey, x.value.text))).toMap
+    iterator.map(x => (x.prefixedKey, x.value.text)).toMap
 
   /** returns Null or the next MetaData item */
   def next: MetaData
@@ -217,9 +217,9 @@ abstract class MetaData
   override def toString: String = sbToString(buildString)
 
   def buildString(sb: StringBuilder): StringBuilder = {
-    sb append ' '
+    sb.append(' ')
     toString1(sb)
-    next buildString sb
+    next.buildString(sb)
   }
 
   /**

shared/src/main/scala/scala/xml/NamespaceBinding.scala

@@ -14,7 +14,6 @@ package scala
 package xml
 
 import scala.collection.Seq
-import Utility.sbToString
 
 /**
  * The class `NamespaceBinding` represents namespace bindings
@@ -30,7 +29,7 @@ case class NamespaceBinding(prefix: String, uri: String, parent: NamespaceBindin
     throw new IllegalArgumentException("zero length prefix not allowed")
 
   def getURI(_prefix: String): String =
-    if (prefix == _prefix) uri else parent getURI _prefix
+    if (prefix == _prefix) uri else parent.getURI(_prefix)
 
   /**
    * Returns some prefix that is mapped to the URI.
@@ -40,13 +39,13 @@ case class NamespaceBinding(prefix: String, uri: String, parent: NamespaceBindin
    * if no prefix is mapped to the URI.
    */
   def getPrefix(_uri: String): String =
-    if (_uri == uri) prefix else parent getPrefix _uri
+    if (_uri == uri) prefix else parent.getPrefix(_uri)
 
-  override def toString: String = sbToString(buildString(_, TopScope))
+  override def toString: String = Utility.sbToString(buildString(_, TopScope))
 
   private def shadowRedefined(stop: NamespaceBinding): NamespaceBinding = {
     def prefixList(x: NamespaceBinding): List[String] =
-      if ((x == null) || (x eq stop)) Nil
+      if ((x == null) || x.eq(stop)) Nil
       else x.prefix :: prefixList(x.parent)
     def fromPrefixList(l: List[String]): NamespaceBinding = l match {
       case Nil     => stop
@@ -70,7 +69,7 @@ case class NamespaceBinding(prefix: String, uri: String, parent: NamespaceBindin
 
   override def basisForHashCode: Seq[Any] = List(prefix, uri, parent)
 
-  def buildString(stop: NamespaceBinding): String = sbToString(buildString(_, stop))
+  def buildString(stop: NamespaceBinding): String = Utility.sbToString(buildString(_, stop))
 
   def buildString(sb: StringBuilder, stop: NamespaceBinding): Unit = {
     shadowRedefined(stop).doBuildString(sb, stop)
@@ -83,6 +82,6 @@ case class NamespaceBinding(prefix: String, uri: String, parent: NamespaceBindin
       if (prefix != null) ":" + prefix else "",
       if (uri != null) uri else ""
     )
-    parent.doBuildString(sb append s, stop) // copy(ignore)
+    parent.doBuildString(sb.append(s), stop) // copy(ignore)
   }
 }

shared/src/main/scala/scala/xml/Node.scala

@@ -81,7 +81,7 @@ abstract class Node extends NodeSeq {
    * @return    the namespace if `scope != null` and prefix was
    *            found, else `null`
    */
-  def getNamespace(pre: String): String = if (scope eq null) null else scope.getURI(pre)
+  def getNamespace(pre: String): String = if (scope.eq(null)) null else scope.getURI(pre)
 
   /**
    * Convenience method, looks up an unprefixed attribute in attributes of this node.
@@ -124,7 +124,7 @@ abstract class Node extends NodeSeq {
   /**
    * Children which do not stringify to "" (needed for equality)
    */
-  def nonEmptyChildren: Seq[Node] = child filterNot (_.toString == "")
+  def nonEmptyChildren: Seq[Node] = child.filterNot(_.toString == "")
 
   /**
    * Descendant axis (all descendants of this node, not including node itself)
@@ -155,7 +155,7 @@ abstract class Node extends NodeSeq {
         (label == x.label) &&
         (attributes == x.attributes) &&
         // (scope == x.scope)               // note - original code didn't compare scopes so I left it as is.
-        (nonEmptyChildren sameElements x.nonEmptyChildren)
+        nonEmptyChildren.sameElements(x.nonEmptyChildren)
     case _ =>
       false
   }
@@ -185,10 +185,10 @@ abstract class Node extends NodeSeq {
    */
   def nameToString(sb: StringBuilder): StringBuilder = {
     if (null != prefix) {
-      sb append prefix
-      sb append ':'
+      sb.append(prefix)
+      sb.append(':')
     }
-    sb append label
+    sb.append(label)
   }
 
   /**

shared/src/main/scala/scala/xml/NodeBuffer.scala

@@ -38,7 +38,7 @@ class NodeBuffer extends scala.collection.mutable.ArrayBuffer[Node] with ScalaVe
   def &+(o: Any): NodeBuffer = {
     o match {
       case null | _: Unit | Text("") => // ignore
-      case it: Iterator[_]           => it foreach &+
+      case it: Iterator[_]           => it.foreach(&+)
       case n: Node                   => super.+=(n)
       case ns: Iterable[_]           => this &+ ns.iterator
       case ns: Array[_]              => this &+ ns.iterator