Reflection: add KClassifier.createType

#KT-8998 In Progress

compiler/testData/codegen/box/reflection/methodsFromAny/typeToStringInnerGeneric.kt

@@ -0,0 +1,16 @@
+// WITH_REFLECT
+
+import kotlin.test.assertEquals
+
+class A<T1> {
+    inner class B<T2, T3> {
+        inner class C<T4>
+    }
+}
+
+fun foo(): A<Int>.B<Double, Float>.C<Long> = null!!
+
+fun box(): String {
+    assertEquals("A<kotlin.Int>.B<kotlin.Double, kotlin.Float>.C<kotlin.Long>", ::foo.returnType.toString())
+    return "OK"
+}

compiler/testData/codegen/box/reflection/types/createType/equality.kt

@@ -0,0 +1,40 @@
+// WITH_REFLECT
+
+import kotlin.reflect.createType
+import kotlin.reflect.KTypeProjection
+import kotlin.test.assertEquals
+import kotlin.test.assertNotEquals
+
+class Foo<T>
+
+fun box(): String {
+    assertEquals(String::class.createType(), String::class.createType())
+
+    assertEquals(
+            Foo::class.createType(listOf(KTypeProjection.Star)),
+            Foo::class.createType(listOf(KTypeProjection.Star))
+    )
+
+    val i = Int::class.createType()
+    assertEquals(
+            Foo::class.createType(listOf(KTypeProjection.Invariant(i))),
+            Foo::class.createType(listOf(KTypeProjection.Invariant(i)))
+    )
+
+    assertNotEquals(
+            Foo::class.createType(listOf(KTypeProjection.In(i))),
+            Foo::class.createType(listOf(KTypeProjection.Out(i)))
+    )
+
+    assertNotEquals(
+            Foo::class.createType(listOf(KTypeProjection.Out(Any::class.createType(nullable = true)))),
+            Foo::class.createType(listOf(KTypeProjection.Star))
+    )
+
+    assertNotEquals(
+            Foo::class.createType(listOf(KTypeProjection.Star), nullable = false),
+            Foo::class.createType(listOf(KTypeProjection.Star), nullable = true)
+    )
+
+    return "OK"
+}

compiler/testData/codegen/box/reflection/types/createType/innerGeneric.kt

@@ -0,0 +1,26 @@
+// WITH_REFLECT
+
+import kotlin.reflect.createType
+import kotlin.reflect.KClass
+import kotlin.reflect.KTypeProjection
+import kotlin.test.assertEquals
+
+class A<T1> {
+    inner class B<T2, T3> {
+        inner class C<T4>
+    }
+    class D
+}
+
+fun foo(): A<Int>.B<Double, Float>.C<Long> = null!!
+
+fun box(): String {
+    fun KClass<*>.inv() = KTypeProjection.Invariant(this.createType())
+
+    val type = A.B.C::class.createType(listOf(Long::class.inv(), Double::class.inv(), Float::class.inv(), Int::class.inv()))
+    assertEquals("A<kotlin.Int>.B<kotlin.Double, kotlin.Float>.C<kotlin.Long>", type.toString())
+
+    assertEquals("A.D", A.D::class.createType().toString())
+
+    return "OK"
+}

compiler/testData/codegen/box/reflection/types/createType/simpleCreateType.kt

@@ -0,0 +1,18 @@
+// WITH_REFLECT
+
+import kotlin.reflect.createType
+import kotlin.reflect.KTypeProjection
+import kotlin.test.assertEquals
+
+class Foo
+class Bar<T>
+
+fun box(): String {
+    assertEquals("Foo", Foo::class.createType().toString())
+    assertEquals("Foo?", Foo::class.createType(nullable = true).toString())
+
+    assertEquals("Bar<kotlin.String>", Bar::class.createType(listOf(KTypeProjection.Invariant(String::class.createType()))).toString())
+    assertEquals("Bar<kotlin.Int>?", Bar::class.createType(listOf(KTypeProjection.Invariant(Int::class.createType())), nullable = true).toString())
+
+    return "OK"
+}

compiler/testData/codegen/box/reflection/types/createType/typeParameter.kt

@@ -0,0 +1,29 @@
+// WITH_REFLECT
+
+import kotlin.reflect.createType
+import kotlin.test.assertEquals
+
+class Foo<T> {
+    fun nonNull(): T = null!!
+    fun nullable(): T? = null
+}
+
+fun box(): String {
+    val tp = Foo::class.typeParameters.single()
+    assertEquals(
+            Foo::class.members.single { it.name == "nonNull" }.returnType,
+            tp.createType()
+    )
+    assertEquals(
+            Foo::class.members.single { it.name == "nullable" }.returnType,
+            tp.createType(nullable = true)
+    )
+
+    assertEquals(tp.createType(), tp.createType())
+    assertEquals(tp.createType(nullable = true), tp.createType(nullable = true))
+
+    assertEquals("T", tp.createType().toString())
+    assertEquals("T?", tp.createType(nullable = true).toString())
+
+    return "OK"
+}

compiler/testData/codegen/box/reflection/types/createType/wrongNumberOfArguments.kt

@@ -0,0 +1,49 @@
+// WITH_REFLECT
+
+import kotlin.reflect.createType
+import kotlin.reflect.KClassifier
+import kotlin.reflect.KTypeProjection
+
+fun test(classifier: KClassifier, arguments: List<KTypeProjection>) {
+    try {
+        classifier.createType(arguments)
+        throw AssertionError("createType should have thrown IllegalArgumentException")
+    }
+    catch (e: IllegalArgumentException) {
+        // OK
+    }
+}
+
+class Outer<O> {
+    inner class Inner<I>
+    class Nested<N>
+}
+
+fun box(): String {
+    val p = KTypeProjection.Star
+
+    test(String::class, listOf(p))
+    test(String::class, listOf(p, p))
+    test(List::class, listOf())
+    test(List::class, listOf(p, p))
+    test(Map::class, listOf())
+    test(Map::class, listOf(p))
+    test(Map::class, listOf(p, p, p))
+    test(Array<Any>::class, listOf())
+
+    test(Outer::class, listOf())
+    test(Outer::class, listOf(p, p))
+
+    // Outer.Inner takes two arguments: first for O, second for I
+    test(Outer.Inner::class, listOf())
+    test(Outer.Inner::class, listOf(p))
+    test(Outer.Inner::class, listOf(p, p, p))
+
+    // Outer.Nested takes one argument for N
+    test(Outer.Nested::class, listOf())
+    test(Outer.Nested::class, listOf(p, p))
+
+    test(Outer::class.typeParameters.single(), listOf(p))
+
+    return "OK"
+}