Introduce backing property: fix false positive for const property #KT-28341 Fixed

idea/src/org/jetbrains/kotlin/idea/intentions/IntroduceBackingPropertyIntention.kt

@@ -40,6 +40,7 @@ class IntroduceBackingPropertyIntention : SelfTargetingIntention<KtProperty>(KtP
     companion object {
         fun canIntroduceBackingProperty(property: KtProperty): Boolean {
             val name = property.name ?: return false
+            if (property.hasModifier(KtTokens.CONST_KEYWORD)) return false
             if (property.hasJvmFieldAnnotation()) return false
 
             val bindingContext = property.getResolutionFacade().analyzeWithAllCompilerChecks(listOf(property)).bindingContext
@@ -61,8 +62,7 @@ class IntroduceBackingPropertyIntention : SelfTargetingIntention<KtProperty>(KtP
             val getter = property.getter
             if (getter == null) {
                 createGetter(property)
-            }
-            else {
+            } else {
                 replaceFieldReferences(getter, property.name!!)
             }
 
@@ -70,8 +70,7 @@ class IntroduceBackingPropertyIntention : SelfTargetingIntention<KtProperty>(KtP
                 val setter = property.setter
                 if (setter == null) {
                     createSetter(property)
-                }
-                else {
+                } else {
                     replaceFieldReferences(setter, property.name!!)
                 }
             }

idea/testData/intentions/introduceBackingProperty/const.kt

@@ -0,0 +1,6 @@
+// IS_APPLICABLE: false
+class C {
+    companion object {
+        const val <caret>CONST = 1
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -9289,6 +9289,11 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             runTest("idea/testData/intentions/introduceBackingProperty/backingFieldRef.kt");
         }
 
+        @TestMetadata("const.kt")
+        public void testConst() throws Exception {
+            runTest("idea/testData/intentions/introduceBackingProperty/const.kt");
+        }
+
         @TestMetadata("inapplicableAbstractProperty.kt")
         public void testInapplicableAbstractProperty() throws Exception {
             runTest("idea/testData/intentions/introduceBackingProperty/inapplicableAbstractProperty.kt");