[FE] Support local contextual declarations

compiler/psi/src/org/jetbrains/kotlin/parsing/KotlinExpressionParsing.java

@@ -1094,6 +1094,9 @@ public class KotlinExpressionParsing extends AbstractKotlinParsing {
      */
     private boolean parseLocalDeclaration(boolean rollbackIfDefinitelyNotExpression, boolean isScriptTopLevel) {
         PsiBuilder.Marker decl = mark();
+        if (atSet(CONTEXT_KEYWORD)) {
+            myKotlinParsing.parseContextReceiverList();
+        }
         KotlinParsing.ModifierDetector detector = new KotlinParsing.ModifierDetector();
         myKotlinParsing.parseModifierList(detector, DEFAULT, TokenSet.EMPTY);
 

compiler/psi/src/org/jetbrains/kotlin/parsing/KotlinParsing.java

@@ -620,7 +620,7 @@ public class KotlinParsing extends AbstractKotlinParsing {
      * contextReceiverList
      *   : "context" "(" (label? typeReference{","})+ ")"
      */
-    private void parseContextReceiverList() {
+    public void parseContextReceiverList() {
         assert _at(CONTEXT_KEYWORD);
         PsiBuilder.Marker contextReceiverList = mark();
         advance(); // CONTEXT_KEYWORD