From a65304556c9d19926f1837ebf5af83dbb39747fa Mon Sep 17 00:00:00 2001
From: Toshiaki Kameyama <kmymtsak@gmail.com>
Date: Sat, 23 Dec 2017 07:05:43 +0300
Subject: [PATCH] CFG: provide "used as expression" in enum constant
 constructor

This allows to avoid
"unused return value of a function with lambda expression body"
for such a situation
So #KT-20429 Fixed
---
 .../jetbrains/kotlin/cfg/ControlFlowProcessor.kt  |  8 ++++++++
 .../unusedLambdaExpressionBody/.inspection        |  1 +
 .../unusedLambdaExpressionBody/inEnumEntry.kt     |  7 +++++++
 .../inspections/LocalInspectionTestGenerated.java | 15 +++++++++++++++
 4 files changed, 31 insertions(+)
 create mode 100644 idea/testData/inspectionsLocal/unusedLambdaExpressionBody/.inspection
 create mode 100644 idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt

diff --git a/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt b/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
index 3afaeb581d8..78f0d1f9ef0 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
@@ -1447,6 +1447,14 @@ class ControlFlowProcessor(private val trace: BindingTrace) {
             generateCallOrMarkUnresolved(call)
         }
 
+        override fun visitInitializerList(list: KtInitializerList) {
+            list.initializers
+                    .filterIsInstance<KtSuperTypeCallEntry>()
+                    .forEach {
+                        generateCallOrMarkUnresolved(it)
+                    }
+        }
+
         private fun generateCallOrMarkUnresolved(call: KtCallElement) {
             if (!generateCall(call)) {
                 val arguments = call.valueArguments.mapNotNull(ValueArgument::getArgumentExpression)
diff --git a/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/.inspection b/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/.inspection
new file mode 100644
index 00000000000..607b45277a6
--- /dev/null
+++ b/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/.inspection
@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.UnusedLambdaExpressionBodyInspection
\ No newline at end of file
diff --git a/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt b/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt
new file mode 100644
index 00000000000..768d976cba1
--- /dev/null
+++ b/idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt
@@ -0,0 +1,7 @@
+// PROBLEM: none
+
+enum class Test(f: () -> Unit) {
+    A(<caret>getFunc())
+}
+
+fun getFunc(): () -> Unit = {}
\ No newline at end of file
diff --git a/idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java b/idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java
index bd2b05cdf1a..afbe1ab748e 100644
--- a/idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java
+++ b/idea/tests/org/jetbrains/kotlin/idea/inspections/LocalInspectionTestGenerated.java
@@ -3861,6 +3861,21 @@ public class LocalInspectionTestGenerated extends AbstractLocalInspectionTest {
         }
     }
 
+    @TestMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class UnusedLambdaExpressionBody extends AbstractLocalInspectionTest {
+        public void testAllFilesPresentInUnusedLambdaExpressionBody() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/inspectionsLocal/unusedLambdaExpressionBody"), Pattern.compile("^([\\w\\-_]+)\\.(kt|kts)$"), TargetBackend.ANY, true);
+        }
+
+        @TestMetadata("inEnumEntry.kt")
+        public void testInEnumEntry() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/inspectionsLocal/unusedLambdaExpressionBody/inEnumEntry.kt");
+            doTest(fileName);
+        }
+    }
+
     @TestMetadata("idea/testData/inspectionsLocal/unusedReceiverParameter")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)