use explicit unitContext

[Cherry-picked 550c316]

Author: bishabosha

compiler/src/dotty/tools/dotc/fromtasty/ReadTasty.scala

@@ -24,7 +24,7 @@ class ReadTasty extends Phase {
     withMode(Mode.ReadPositions) {
       val nextUnits = collection.mutable.ListBuffer.empty[CompilationUnit]
       val unitContexts = units.view.map(ctx.fresh.setCompilationUnit)
-      for given Context <- unitContexts if addTasty(nextUnits += _) do ()
+      for unitContext <- unitContexts if addTasty(nextUnits += _)(using unitContext) do ()
       nextUnits.toList
     }
 

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

@@ -48,9 +48,9 @@ class Parser extends Phase {
 
     val unitContexts0 =
       for
-        given Context <- unitContexts
-        if parse
-      yield ctx
+        unitContext <- unitContexts
+        if parse(using unitContext)
+      yield unitContext
 
     record("parsedTrees", ast.Trees.ntrees)
 

compiler/src/dotty/tools/dotc/transform/init/Checker.scala

@@ -41,7 +41,7 @@ class Checker extends Phase:
     val unitContexts = units.map(unit => checkCtx.fresh.setCompilationUnit(unit))
 
     val units0 =
-      for given Context <- unitContexts if traverse(traverser) yield ctx.compilationUnit
+      for unitContext <- unitContexts if traverse(traverser)(using unitContext) yield unitContext.compilationUnit
 
     cancellable {
       val classes = traverser.getClasses()

compiler/src/dotty/tools/dotc/typer/TyperPhase.scala

@@ -75,9 +75,9 @@ class TyperPhase(addRootImports: Boolean = true) extends Phase {
     val unitContexts0 =
       try
         for
-          given Context <- unitContexts
-          if enterSyms
-        yield ctx
+          unitContext <- unitContexts
+          if enterSyms(using unitContext)
+        yield unitContext
       finally
         ctx.run.advanceSubPhase() // tick from "typer (indexing)" to "typer (typechecking)"
 
@@ -94,19 +94,19 @@ class TyperPhase(addRootImports: Boolean = true) extends Phase {
     val unitContexts1 =
       try
         for
-          given Context <- unitContexts0
-          if typeCheck
-        yield ctx
+          unitContext <- unitContexts0
+          if typeCheck(using unitContext)
+        yield unitContext
       finally
         ctx.run.advanceSubPhase() // tick from "typer (typechecking)" to "typer (java checking)"
 
     record("total trees after typer", ast.Trees.ntrees)
 
     val unitContexts2 =
       for
-        given Context <- unitContexts1
-        if javaCheck // after typechecking to avoid cycles
-      yield ctx
+        unitContext <- unitContexts1
+        if javaCheck(using unitContext) // after typechecking to avoid cycles
+      yield unitContext
 
     val newUnits = unitContexts2.map(_.compilationUnit).filterNot(discardAfterTyper)
     ctx.run.nn.checkSuspendedUnits(newUnits)