IR: create stubs for constructor type parameters

Java constructors can have type parameters of their own:
  public class J<X extends Number> {
    public <Y extends CharSequence> J() {}
  }

When such constructors are called from Kotlin, type parameters for
constructor follow type parameters for class:
  fun test() = J<Int, String>() // <X=Int, Y=String>

Descriptor-based representation uses the same type parameters ordering.

Also, use 'withScope' in IrLazyFunction type parameters creation.

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyConstructor.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.util.DeclarationStubGenerator
 import org.jetbrains.kotlin.ir.util.TypeTranslator
+import org.jetbrains.kotlin.ir.util.withScope
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.descriptorUtil.isEffectivelyExternal
@@ -55,7 +56,17 @@ class IrLazyConstructor(
         TypeTranslator
     )
 
-    override val typeParameters: MutableList<IrTypeParameter> = arrayListOf()
+    override val typeParameters: MutableList<IrTypeParameter> by lazy {
+        typeTranslator.buildWithScope(this) {
+            stubGenerator.symbolTable.withScope(descriptor) {
+                val classTypeParametersCount = descriptor.constructedClass.original.declaredTypeParameters.size
+                val allConstructorTypeParameters = descriptor.typeParameters
+                allConstructorTypeParameters.subList(classTypeParametersCount, allConstructorTypeParameters.size).mapTo(ArrayList()) {
+                    stubGenerator.generateOrGetTypeParameterStub(it)
+                }
+            }
+        }
+    }
 
     init {
         symbol.bind(this)

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/lazy/IrLazyFunction.kt

@@ -16,6 +16,7 @@ import org.jetbrains.kotlin.ir.symbols.IrPropertySymbol
 import org.jetbrains.kotlin.ir.symbols.IrSimpleFunctionSymbol
 import org.jetbrains.kotlin.ir.util.DeclarationStubGenerator
 import org.jetbrains.kotlin.ir.util.TypeTranslator
+import org.jetbrains.kotlin.ir.util.withScope
 import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.descriptorUtil.propertyIfAccessor
@@ -62,18 +63,17 @@ class IrLazyFunction(
 
     override val typeParameters: MutableList<IrTypeParameter> by lazy {
         typeTranslator.buildWithScope(this) {
-            stubGenerator.symbolTable.enterScope(descriptor)
-            val propertyIfAccessor = descriptor.propertyIfAccessor
-            propertyIfAccessor.typeParameters.mapTo(arrayListOf()) {
-                if (descriptor != propertyIfAccessor) {
-                    stubGenerator.generateOrGetScopedTypeParameterStub(it).also {
-                        it.parent = this@IrLazyFunction
+            stubGenerator.symbolTable.withScope(descriptor) {
+                val propertyIfAccessor = descriptor.propertyIfAccessor
+                propertyIfAccessor.typeParameters.mapTo(arrayListOf()) {
+                    if (descriptor != propertyIfAccessor) {
+                        stubGenerator.generateOrGetScopedTypeParameterStub(it).also {
+                            it.parent = this@IrLazyFunction
+                        }
+                    } else {
+                        stubGenerator.generateOrGetTypeParameterStub(it)
                     }
-                } else {
-                    stubGenerator.generateOrGetTypeParameterStub(it)
                 }
-            }.also {
-                stubGenerator.symbolTable.leaveScope(descriptor)
             }
         }
     }

compiler/testData/ir/irText/stubs/javaConstructorWithTypeParameters.kt

@@ -0,0 +1,8 @@
+// FILE: javaConstructorWithTypeParameters.kt
+// DUMP_EXTERNAL_CLASS J
+fun test() = J<String>()
+
+// FILE: J.java
+public class J {
+    public <T> J() {}
+}

compiler/testData/ir/irText/stubs/javaConstructorWithTypeParameters.txt

@@ -0,0 +1,6 @@
+FILE fqName:<root> fileName:/javaConstructorWithTypeParameters.kt
+  FUN name:test visibility:public modality:FINAL <> () returnType:<root>.J
+    BLOCK_BODY
+      RETURN type=kotlin.Nothing from='public final fun test (): <root>.J declared in <root>'
+        CALL 'public constructor <init> <T> () declared in <root>.J' type=<root>.J origin=null
+          <T>: kotlin.String

compiler/testData/ir/irText/stubs/javaConstructorWithTypeParameters__J.txt

@@ -0,0 +1,17 @@
+CLASS IR_EXTERNAL_DECLARATION_STUB CLASS name:J modality:OPEN visibility:public superTypes:[<unbound IrClassSymbolImpl>]
+  $this: VALUE_PARAMETER IR_EXTERNAL_DECLARATION_STUB name:<this> type:<root>.J
+  CONSTRUCTOR IR_EXTERNAL_DECLARATION_STUB visibility:public <T> () returnType:<root>.J
+    TYPE_PARAMETER IR_EXTERNAL_DECLARATION_STUB name:T index:0 variance: superTypes:[<unbound IrClassSymbolImpl>?]
+  FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:<unbound IrClassSymbolImpl>) returnType:<unbound IrClassSymbolImpl>
+    overridden:
+      public open fun hashCode (): <unbound IrClassSymbolImpl> declared in kotlin.Any
+    $this: VALUE_PARAMETER FAKE_OVERRIDE name:<this> type:kotlin.Any
+  FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:<unbound IrClassSymbolImpl>
+    overridden:
+      public open fun equals (other: kotlin.Any?): <unbound IrClassSymbolImpl> declared in kotlin.Any
+    $this: VALUE_PARAMETER FAKE_OVERRIDE name:<this> type:kotlin.Any
+    VALUE_PARAMETER IR_EXTERNAL_DECLARATION_STUB name:other index:0 type:kotlin.Any?
+  FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:<unbound IrClassSymbolImpl>
+    overridden:
+      public open fun toString (): <unbound IrClassSymbolImpl> declared in kotlin.Any
+    $this: VALUE_PARAMETER FAKE_OVERRIDE name:<this> type:kotlin.Any

compiler/tests/org/jetbrains/kotlin/ir/IrTextTestCaseGenerated.java

@@ -1518,6 +1518,11 @@ public class IrTextTestCaseGenerated extends AbstractIrTextTestCase {
             runTest("compiler/testData/ir/irText/stubs/genericClassInDifferentModule.kt");
         }
 
+        @TestMetadata("javaConstructorWithTypeParameters.kt")
+        public void testJavaConstructorWithTypeParameters() throws Exception {
+            runTest("compiler/testData/ir/irText/stubs/javaConstructorWithTypeParameters.kt");
+        }
+
         @TestMetadata("javaEnum.kt")
         public void testJavaEnum() throws Exception {
             runTest("compiler/testData/ir/irText/stubs/javaEnum.kt");