Merge pull request #10292 from dotty-staging/refactor-Nullables

Refactor Nullables.scala

Author: odersky

compiler/src/dotty/tools/dotc/core/Contexts.scala

@@ -16,7 +16,7 @@ import ast.untpd
 import Flags.GivenOrImplicit
 import util.{NoSource, SimpleIdentityMap, SourceFile, HashSet, ReusableInstance}
 import typer.{Implicits, ImportInfo, Inliner, SearchHistory, SearchRoot, TypeAssigner, Typer, Nullables}
-import Nullables.{NotNullInfo, given}
+import Nullables._
 import Implicits.ContextualImplicits
 import config.Settings._
 import config.Config

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

@@ -27,7 +27,7 @@ import Inferencing._
 import reporting._
 import transform.TypeUtils._
 import transform.SymUtils._
-import Nullables.{postProcessByNameArgs, given}
+import Nullables._
 import config.Feature
 
 import collection.mutable

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

@@ -24,7 +24,7 @@ import config.Printers.inlining
 import ErrorReporting.errorTree
 import dotty.tools.dotc.util.{SimpleIdentityMap, SimpleIdentitySet, EqHashMap, SourceFile, SourcePosition, SrcPos}
 import dotty.tools.dotc.parsing.Parsers.Parser
-import Nullables.given
+import Nullables._
 
 import collection.mutable
 import reporting.trace