From 020053c3215579e8aeb871a4ad0078516994270d Mon Sep 17 00:00:00 2001
From: Paul Phillips <paulp@improving.org>
Date: Thu, 5 Jan 2012 14:26:01 -0800
Subject: More consistent use of Names.

Several large helpings of tedium later, fewer strings are being
discarded like so much refuse. Some names now cache a String, but only
"named Names", so it's not very many and they pay for themselves pretty
quickly. Many fewer name-related implicit conversions now taking place.
A number of efficiency related measures.
---
 .../scala/tools/nsc/ast/parser/Parsers.scala         | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

(limited to 'src/compiler/scala/tools/nsc/ast/parser/Parsers.scala')

diff --git a/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala b/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala
index db97dd3475..5881821ab3 100644
--- a/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala
+++ b/src/compiler/scala/tools/nsc/ast/parser/Parsers.scala
@@ -314,7 +314,7 @@ self =>
       val stmts = templateStatSeq(false)._2
       accept(EOF)
 
-      def mainModuleName = settings.script.value
+      def mainModuleName = newTermName(settings.script.value)
       /** If there is only a single object template in the file and it has a
        *  suitable main method, we will use it rather than building another object
        *  around it.  Since objects are loaded lazily the whole script would have
@@ -343,7 +343,7 @@ self =>
              *  whole additional parse.  So instead, if the actual object's name differs from
              *  what the script is expecting, we transform it to match.
              */
-            if (name.toString == mainModuleName) md
+            if (name == mainModuleName) md
             else treeCopy.ModuleDef(md, mods, mainModuleName, template)
           case _ =>
             /** If we see anything but the above, fail. */
@@ -352,7 +352,7 @@ self =>
         Some(makePackaging(0, emptyPkg, newStmts))
       }
 
-      if (mainModuleName == ScriptRunner.defaultScriptMain)
+      if (mainModuleName == newTermName(ScriptRunner.defaultScriptMain))
         searchForMain() foreach { return _ }
 
       /** Here we are building an AST representing the following source fiction,
@@ -384,13 +384,13 @@ self =>
 
       // def main
       def mainParamType = AppliedTypeTree(Ident(tpnme.Array), List(Ident(tpnme.String)))
-      def mainParameter = List(ValDef(Modifiers(Flags.PARAM), "argv", mainParamType, EmptyTree))
-      def mainSetArgv   = List(ValDef(NoMods, "args", TypeTree(), Ident("argv")))
+      def mainParameter = List(ValDef(Modifiers(Flags.PARAM), nme.argv, mainParamType, EmptyTree))
+      def mainSetArgv   = List(ValDef(NoMods, nme.args, TypeTree(), Ident(nme.argv)))
       def mainNew       = makeNew(Nil, emptyValDef, stmts, List(Nil), NoPosition, NoPosition)
       def mainDef       = DefDef(NoMods, nme.main, Nil, List(mainParameter), scalaDot(tpnme.Unit), Block(mainSetArgv, mainNew))
 
       // object Main
-      def moduleName  = ScriptRunner scriptMain settings
+      def moduleName  = newTermName(ScriptRunner scriptMain settings)
       def moduleBody  = Template(List(scalaScalaObjectConstr), emptyValDef, List(emptyInit, mainDef))
       def moduleDef   = ModuleDef(NoMods, moduleName, moduleBody)
 
@@ -980,6 +980,7 @@ self =>
         nme.ERROR
       }
     def ident(): Name = ident(true)
+    def rawIdent(): Name = try in.name finally in.nextToken()
 
     /** For when it's known already to be a type name. */
     def identForType(): TypeName = ident().toTypeName
@@ -1117,7 +1118,7 @@ self =>
         case LONGLIT               => in.intVal(isNegated)
         case FLOATLIT              => in.floatVal(isNegated).toFloat
         case DOUBLELIT             => in.floatVal(isNegated)
-        case STRINGLIT             => in.strVal
+        case STRINGLIT             => in.strVal.intern()
         case TRUE                  => true
         case FALSE                 => false
         case NULL                  => null
@@ -1465,8 +1466,9 @@ self =>
     def prefixExpr(): Tree = {
       if (isUnaryOp) {
         atPos(in.offset) {
-          val name: Name = "unary_" + ident()
-          if (in.name == raw.MINUS && isNumericLit) simpleExprRest(atPos(in.offset)(literal(true)), true)
+          val name = nme.toUnaryName(rawIdent())
+          // val name = nme.toUnaryName(ident())  // val name: Name = "unary_" + ident()
+          if (name == nme.UNARY_- && isNumericLit) simpleExprRest(atPos(in.offset)(literal(true)), true)
           else Select(stripParens(simpleExpr()), name)
         }
       }
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