Small API changes in preparation for dotty-interfaces

- Rename Diagnostic#msg to message, this is nicer for a public API
- Rename SourceFile#lineContents and SourcePosition#lineContents
  to lineContent, the former is not grammatically correct.
- Add some convenience methods to SourcePosition.

Author: smarter

src/dotty/tools/dotc/reporting/ConsoleReporter.scala

@@ -22,7 +22,7 @@ class ConsoleReporter(
   protected def ErrorLimit = 100
 
   def printSourceLine(pos: SourcePosition) =
-    printMessage(pos.lineContents.stripLineEnd)
+    printMessage(pos.lineContent.stripLineEnd)
 
   def printColumnMarker(pos: SourcePosition) =
     if (pos.exists) { printMessage(" " * pos.column + "^") }
@@ -42,15 +42,15 @@ class ConsoleReporter(
 
   override def doReport(d: Diagnostic)(implicit ctx: Context): Unit = d match {
     case d: Error =>
-      printMessageAndPos(s"error: ${d.msg}", d.pos)
+      printMessageAndPos(s"error: ${d.message}", d.pos)
       if (ctx.settings.prompt.value) displayPrompt()
     case d: ConditionalWarning if !d.enablingOption.value =>
     case d: MigrationWarning =>
-      printMessageAndPos(s"migration warning: ${d.msg}", d.pos)
+      printMessageAndPos(s"migration warning: ${d.message}", d.pos)
     case d: Warning =>
-      printMessageAndPos(s"warning: ${d.msg}", d.pos)
+      printMessageAndPos(s"warning: ${d.message}", d.pos)
     case _ =>
-      printMessageAndPos(d.msg, d.pos)
+      printMessageAndPos(d.message, d.pos)
   }
 
   def displayPrompt(): Unit = {

src/dotty/tools/dotc/reporting/Diagnostic.scala

@@ -21,7 +21,7 @@ class Diagnostic(msgFn: => String, val pos: SourcePosition, val level: Int) exte
   private var myIsNonSensical: Boolean = false
 
   /** The message to report */
-  def msg: String = {
+  def message: String = {
     if (myMsg == null) {
       myMsg = msgFn
       if (myMsg.contains(nonSensicalStartTag)) {
@@ -40,8 +40,8 @@ class Diagnostic(msgFn: => String, val pos: SourcePosition, val level: Int) exte
    *  they look weird and are normally follow-up errors to something that
    *  was diagnosed before.
    */
-  def isNonSensical = { msg; myIsNonSensical }
+  def isNonSensical = { message; myIsNonSensical }
 
-  override def toString = s"$getClass at $pos: $msg"
-  override def getMessage() = msg
+  override def toString = s"$getClass at $pos: $message"
+  override def getMessage() = message
 }

src/dotty/tools/dotc/reporting/StoreReporter.scala

@@ -15,7 +15,7 @@ class StoreReporter(outer: Reporter) extends Reporter {
   private var infos: mutable.ListBuffer[Diagnostic] = null
 
   def doReport(d: Diagnostic)(implicit ctx: Context): Unit = {
-    typr.println(s">>>> StoredError: ${d.msg}") // !!! DEBUG
+    typr.println(s">>>> StoredError: ${d.message}") // !!! DEBUG
     if (infos == null) infos = new mutable.ListBuffer
     infos += d
   }

src/dotty/tools/dotc/util/SourceFile.scala

@@ -113,8 +113,8 @@ case class SourceFile(file: AbstractFile, content: Array[Char]) {
   def nextLine(offset: Int): Int =
     lineToOffset(offsetToLine(offset) + 1 min lineIndices.length - 1)
 
-  /** The contents of the line containing position `offset` */
-  def lineContents(offset: Int): String =
+  /** The content of the line containing position `offset` */
+  def lineContent(offset: Int): String =
     content.slice(startOfLine(offset), nextLine(offset)).mkString
 
   /** The column corresponding to `offset`, starting at 0 */

src/dotty/tools/dotc/util/SourcePosition.scala

@@ -5,19 +5,24 @@ import Positions.{Position, NoPosition}
 
 /** A source position is comprised of a position in a source file */
 case class SourcePosition(source: SourceFile, pos: Position) {
-  def point: Int = pos.point
-  def start: Int = pos.start
-  def end: Int = pos.end
   def exists = pos.exists
 
-  def lineContents: String = source.lineContents(point)
+  def lineContent: String = source.lineContent(point)
 
+  def point: Int = pos.point
   /** The line of the position, starting at 0 */
   def line: Int = source.offsetToLine(point)
-
   /** The column of the position, starting at 0 */
   def column: Int = source.column(point)
 
+  def start: Int = pos.start
+  def startLine: Int = source.offsetToLine(start)
+  def startColumn: Int = source.column(start)
+
+  def end: Int = pos.end
+  def endLine: Int = source.offsetToLine(end)
+  def endColumn: Int = source.column(end)
+
   override def toString =
     if (source.exists) s"${source.file}:${line + 1}"
     else s"(no source file, offset = ${pos.point})"