extend lambda valid context: conditional expressions (IDEA-91140)

java/java-psi-api/src/com/intellij/psi/LambdaUtil.java

@@ -85,7 +85,8 @@ public class LambdaUtil {
            context instanceof PsiReturnStatement ||
            context instanceof PsiExpressionList ||
            context instanceof PsiParenthesizedExpression ||
-           context instanceof PsiArrayInitializerExpression;
+           context instanceof PsiArrayInitializerExpression ||
+           context instanceof PsiConditionalExpression;
   }
 
   public static boolean isLambdaFullyInferred(PsiLambdaExpression expression, PsiType functionalInterfaceType) {

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/highlighting/LambdaContext.java

@@ -15,4 +15,13 @@ class Test {
         I o = (I)(int x)-> { };
         return (int x) -> {};
     }
+}
+
+interface II {
+  boolean _(String s);
+}
+class Test1 {
+  void bar(boolean b){
+    II ik = b ? (s)-> true : (s)->false;
+  }
 }