From 861ea6a30fb3b00940a59083001df015372a050d Mon Sep 17 00:00:00 2001
From: Simon Ogorodnik <Simon.Ogorodnik@jetbrains.com>
Date: Tue, 23 Apr 2019 04:20:01 +0300
Subject: [PATCH] Provide hashCode and equals for lookup tag based types

---
 .../kotlin/fir/symbols/ConeLookupTags.kt      | 17 ++++++++++++++-
 .../jetbrains/kotlin/fir/types/impl/Impl.kt   | 21 +++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/ConeLookupTags.kt b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/ConeLookupTags.kt
index 2329c88390a..855097c730a 100644
--- a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/ConeLookupTags.kt
+++ b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/symbols/ConeLookupTags.kt
@@ -31,4 +31,19 @@ interface ConeTypeAliasLookupTag : ConeClassLikeLookupTag
 
 interface ConeClassLookupTag : ConeClassLikeLookupTag
 
-class ConeClassLikeLookupTagImpl(override val classId: ClassId) : ConeClassLikeLookupTag
+class ConeClassLikeLookupTagImpl(override val classId: ClassId) : ConeClassLikeLookupTag {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as ConeClassLikeLookupTagImpl
+
+        if (classId != other.classId) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        return classId.hashCode()
+    }
+}
diff --git a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
index 6c83588ca8e..9601c98a8b7 100644
--- a/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
+++ b/compiler/fir/cones/src/org/jetbrains/kotlin/fir/types/impl/Impl.kt
@@ -15,6 +15,27 @@ open class ConeClassTypeImpl(
     isNullable: Boolean
 ) : ConeClassType() {
     override val nullability: ConeNullability = ConeNullability.create(isNullable)
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as ConeClassTypeImpl
+
+        if (lookupTag != other.lookupTag) return false
+        if (!typeArguments.contentEquals(other.typeArguments)) return false
+        if (nullability != other.nullability) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = lookupTag.hashCode()
+        result = 31 * result + typeArguments.contentHashCode()
+        result = 31 * result + nullability.hashCode()
+        return result
+    }
+
+
 }
 
 class ConeAbbreviatedTypeImpl(