Fix IDE to use new IFT syntax

Author: odersky

language-server/test/dotty/tools/languageserver/util/CodeTester.scala

@@ -195,7 +195,7 @@ class CodeTester(projects: List[Project]) {
 
   private def doAction(action: Action): this.type = {
     try {
-      action.execute()(testServer, testServer.client, positions)
+      action.execute() with (testServer, testServer.client, positions)
     } catch {
       case ex: AssertionError =>
         val sourcesStr =
@@ -210,7 +210,7 @@ class CodeTester(projects: List[Project]) {
             |
             |$sourcesStr
             |
-            |while executing action: ${action.show(positions)}
+            |while executing action: ${action.show with positions}
             |
           """.stripMargin
         val assertionError = new AssertionError(msg + ex.getMessage)

language-server/test/dotty/tools/languageserver/util/PositionContext.scala

@@ -24,5 +24,5 @@ class PositionContext(positionMap: Map[CodeMarker, (TestFile, Int, Int)]) {
 }
 
 object PositionContext {
-  type PosCtx[T] = implicit PositionContext => T
+  type PosCtx[T] = PositionContext |=> T
 }

language-server/test/dotty/tools/languageserver/util/actions/Action.scala

@@ -11,7 +11,7 @@ import PositionContext._
  * definition, etc.)
  */
 trait Action {
-  type Exec[T] = implicit (TestServer, TestClient, PositionContext) => T
+  type Exec[T] = (TestServer, TestClient, PositionContext) |=> T
 
   /** Execute the action. */
   def execute(): Exec[Unit]