From 71de2e3265c1acb94d40349f4c7f25ce8d405913 Mon Sep 17 00:00:00 2001
From: Mikhail Zarechenskiy <mikhail.zarechenskiy@jetbrains.com>
Date: Sun, 6 May 2018 02:59:29 +0300
Subject: [PATCH] Report diagnostics for inline classes even if the feature is
 unsupported

 This would help for those who use inline classes by suppressing error
 about unsupported feature
---
 .../resolve/checkers/InlineClassDeclarationChecker.kt      | 3 ---
 .../inlineClasses/basicInlineClassDeclarationDisabled.kt   | 3 +++
 .../inlineClasses/basicInlineClassDeclarationDisabled.txt  | 7 +++++++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/InlineClassDeclarationChecker.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/InlineClassDeclarationChecker.kt
index a216bc04e46..c37596a1592 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/InlineClassDeclarationChecker.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/InlineClassDeclarationChecker.kt
@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.resolve.checkers
 
-import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.ClassKind
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
@@ -20,8 +19,6 @@ import org.jetbrains.kotlin.resolve.DescriptorUtils
 
 object InlineClassDeclarationChecker : DeclarationChecker {
     override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
-        if (!context.languageVersionSettings.supportsFeature(LanguageFeature.InlineClasses)) return
-
         if (declaration !is KtClass) return
         if (descriptor !is ClassDescriptor || !descriptor.isInline) return
         if (descriptor.kind != ClassKind.CLASS) return
diff --git a/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.kt b/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.kt
index 05858b6c8ff..e2708abccc4 100644
--- a/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.kt
+++ b/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.kt
@@ -1,7 +1,10 @@
 // !LANGUAGE: -InlineClasses
+// !DIAGNOSTICS: -UNUSED_PARAMETER
 
 <!UNSUPPORTED_FEATURE!>inline<!> class Foo(val x: Int)
 
 <!WRONG_MODIFIER_TARGET!>inline<!> annotation class InlineAnn
 <!WRONG_MODIFIER_TARGET!>inline<!> object InlineObject
 <!WRONG_MODIFIER_TARGET!>inline<!> enum class InlineEnum
+
+<!UNSUPPORTED_FEATURE!>inline<!> class NotVal(<!INLINE_CLASS_CONSTRUCTOR_NOT_FINAL_READ_ONLY_PARAMETER!>x: Int<!>)
\ No newline at end of file
diff --git a/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.txt b/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.txt
index 932bd635c32..e73ea0dc28b 100644
--- a/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.txt
+++ b/compiler/testData/diagnostics/tests/inlineClasses/basicInlineClassDeclarationDisabled.txt
@@ -38,3 +38,10 @@ public inline object InlineObject {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
+
+public final inline class NotVal {
+    public constructor NotVal(/*0*/ x: kotlin.Int)
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}