JS: fix behaviour of char-returning functions with multiple inheritance

See KT-19772

compiler/testData/diagnostics/testsWithJsStdLib/wrongMultipleInheritance.kt

@@ -0,0 +1,25 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+open class A {
+    fun get(index: Int): Char = '*'
+}
+
+abstract class <!WRONG_MULTIPLE_INHERITANCE!>B<!> : A(), CharSequence
+
+interface I {
+    fun nextChar(): Char
+}
+
+abstract class <!WRONG_MULTIPLE_INHERITANCE!>C<!> : CharIterator(), I {
+    override fun nextChar(): Char = '*'
+}
+
+class <!WRONG_MULTIPLE_INHERITANCE!>CC(val s: CharSequence)<!> : CharSequence by s, MyCharSequence {}
+
+interface MyCharSequence {
+    val length: Int
+
+    operator fun get(index: Int): Char
+
+    fun subSequence(startIndex: Int, endIndex: Int): CharSequence
+}

compiler/testData/diagnostics/testsWithJsStdLib/wrongMultipleInheritance.txt

@@ -0,0 +1,56 @@
+package
+
+public open class A {
+    public constructor A()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final fun get(/*0*/ index: kotlin.Int): kotlin.Char
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public abstract class B : A, kotlin.CharSequence {
+    public constructor B()
+    public abstract override /*1*/ /*fake_override*/ val length: kotlin.Int
+    public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public final override /*2*/ /*fake_override*/ fun get(/*0*/ index: kotlin.Int): kotlin.Char
+    public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract override /*1*/ /*fake_override*/ fun subSequence(/*0*/ startIndex: kotlin.Int, /*1*/ endIndex: kotlin.Int): kotlin.CharSequence
+    public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public abstract class C : kotlin.collections.CharIterator, I {
+    public constructor C()
+    public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract override /*1*/ /*fake_override*/ fun hasNext(): kotlin.Boolean
+    public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public final override /*1*/ /*fake_override*/ fun next(): kotlin.Char
+    public open override /*2*/ fun nextChar(): kotlin.Char
+    public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class CC : kotlin.CharSequence, MyCharSequence {
+    public constructor CC(/*0*/ s: kotlin.CharSequence)
+    public open override /*2*/ /*delegation*/ val length: kotlin.Int
+    public final val s: kotlin.CharSequence
+    public open override /*2*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*2*/ /*delegation*/ fun get(/*0*/ index: kotlin.Int): kotlin.Char
+    public open override /*2*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*2*/ /*delegation*/ fun subSequence(/*0*/ startIndex: kotlin.Int, /*1*/ endIndex: kotlin.Int): kotlin.CharSequence
+    public open override /*2*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface I {
+    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 abstract fun nextChar(): kotlin.Char
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface MyCharSequence {
+    public abstract val length: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract operator fun get(/*0*/ index: kotlin.Int): kotlin.Char
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract fun subSequence(/*0*/ startIndex: kotlin.Int, /*1*/ endIndex: kotlin.Int): kotlin.CharSequence
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithJsStdLibGenerated.java

@@ -66,6 +66,12 @@ public class DiagnosticsTestWithJsStdLibGenerated extends AbstractDiagnosticsTes
         doTest(fileName);
     }
 
+    @TestMetadata("wrongMultipleInheritance.kt")
+    public void testWrongMultipleInheritance() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/testsWithJsStdLib/wrongMultipleInheritance.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/JsPlatformConfigurator.kt

@@ -35,7 +35,7 @@ object JsPlatformConfigurator : PlatformConfigurator(
         additionalDeclarationCheckers = listOf(
                 NativeInvokeChecker(), NativeGetterChecker(), NativeSetterChecker(),
                 JsNameChecker, JsModuleChecker, JsExternalFileChecker,
-                JsExternalChecker, JsInheritanceChecker,
+                JsExternalChecker, JsInheritanceChecker, JsMultipleInheritanceChecker,
                 JsRuntimeAnnotationChecker,
                 JsDynamicDeclarationChecker,
                 ExpectedActualDeclarationChecker

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/DefaultErrorMessagesJs.kt

@@ -104,6 +104,10 @@ private val DIAGNOSTIC_FACTORY_TO_RENDERER by lazy {
         put(ErrorsJs.EXTERNAL_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER, "External class constructor cannot have a property parameter")
         put(ErrorsJs.CALL_TO_DEFINED_EXTERNALLY_FROM_NON_EXTERNAL_DECLARATION, "This property can only be used from external declarations")
 
+        put(ErrorsJs.WRONG_MULTIPLE_INHERITANCE,
+            "Can't apply multiple inheritance here, since it's impossible to generate bridge for system function {0}",
+            Renderers.DECLARATION_NAME_WITH_KIND)
+
         this
     }
 }

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/ErrorsJs.java

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.js.resolve.diagnostics;
 
 import com.intellij.psi.PsiElement;
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor;
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
 import org.jetbrains.kotlin.diagnostics.*;
@@ -109,6 +110,9 @@ public interface ErrorsJs {
     DiagnosticFactory0<KtParameter> EXTERNAL_CLASS_CONSTRUCTOR_PROPERTY_PARAMETER = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> CALL_TO_DEFINED_EXTERNALLY_FROM_NON_EXTERNAL_DECLARATION = DiagnosticFactory0.create(ERROR);
 
+    DiagnosticFactory1<PsiElement, CallableMemberDescriptor> WRONG_MULTIPLE_INHERITANCE =
+            DiagnosticFactory1.create(ERROR, DECLARATION_SIGNATURE_OR_DEFAULT);
+
     @SuppressWarnings("UnusedDeclaration")
     Object _initializer = new Object() {
         {

js/js.frontend/src/org/jetbrains/kotlin/js/resolve/diagnostics/JsMultipleInheritanceChecker.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.js.resolve.diagnostics
+
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.diagnostics.DiagnosticSink
+import org.jetbrains.kotlin.name.FqNameUnsafe
+import org.jetbrains.kotlin.psi.KtDeclaration
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.checkers.SimpleDeclarationChecker
+import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
+
+object JsMultipleInheritanceChecker : SimpleDeclarationChecker {
+    private val fqNames = listOf(
+            FqNameUnsafe("kotlin.CharSequence.get"),
+            FqNameUnsafe("kotlin.collections.CharIterator.nextChar")
+    )
+    private val simpleNames = fqNames.mapTo(mutableSetOf()) { it.shortName() }
+
+    override fun check(
+            declaration: KtDeclaration, descriptor: DeclarationDescriptor,
+            diagnosticHolder: DiagnosticSink, bindingContext: BindingContext
+    ) {
+        if (descriptor !is ClassDescriptor) return
+
+        for (callable in descriptor.unsubstitutedMemberScope.getContributedDescriptors { it in simpleNames }
+                .filterIsInstance<CallableMemberDescriptor>()) {
+            if (callable.overriddenDescriptors.size > 1 && callable.overriddenDescriptors.any { it.fqNameUnsafe in fqNames }) {
+                diagnosticHolder.report(ErrorsJs.WRONG_MULTIPLE_INHERITANCE.on(declaration, callable))
+            }
+        }
+    }
+}

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -445,6 +445,18 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/char/charUnaryOperations.kt");
             doTest(fileName);
         }
+
+        @TestMetadata("topLevelCallables.kt")
+        public void testTopLevelCallables() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/char/topLevelCallables.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("unboxedCharSpecials.kt")
+        public void testUnboxedCharSpecials() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/char/unboxedCharSpecials.kt");
+            doTest(fileName);
+        }
     }
 
     @TestMetadata("js/js.translator/testData/box/classObject")
@@ -803,6 +815,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("js/js.translator/testData/box/coercion"), Pattern.compile("^([^_](.+))\\.kt$"), TargetBackend.JS, true);
         }
 
+        @TestMetadata("bridgeChar.kt")
+        public void testBridgeChar() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/coercion/bridgeChar.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("classProperty.kt")
         public void testClassProperty() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/coercion/classProperty.kt");
@@ -857,6 +875,12 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("propertyBridgeChar.kt")
+        public void testPropertyBridgeChar() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/coercion/propertyBridgeChar.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("receiverSmartCast.kt")
         public void testReceiverSmartCast() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("js/js.translator/testData/box/coercion/receiverSmartCast.kt");

js/js.translator/src/org/jetbrains/kotlin/js/translate/callTranslator/CallTranslator.kt

@@ -65,7 +65,9 @@ object CallTranslator {
                      value: JsExpression,
                      extensionOrDispatchReceiver: JsExpression? = null
     ): JsExpression {
-        val variableAccessInfo = VariableAccessInfo(context.getCallInfo(resolvedCall, extensionOrDispatchReceiver), value)
+        val type = TranslationUtils.getReturnTypeForCoercion(resolvedCall.resultingDescriptor)
+        val coerceValue = TranslationUtils.coerce(context, value, type)
+        val variableAccessInfo = VariableAccessInfo(context.getCallInfo(resolvedCall, extensionOrDispatchReceiver), coerceValue)
         val result = variableAccessInfo.translateVariableAccess().source(resolvedCall.call.callElement)
         result.type = context.currentModule.builtIns.unitType
         return result

js/js.translator/src/org/jetbrains/kotlin/js/translate/initializer/InitializerVisitor.java

@@ -51,6 +51,10 @@ public final class InitializerVisitor extends TranslatorVisitor<Void> {
         KtExpression delegate = property.getDelegateExpression();
         if (initializer != null) {
             assert value != null;
+            KotlinType type = TranslationUtils.isReferenceToSyntheticBackingField(descriptor) ?
+                              descriptor.getType() :
+                              TranslationUtils.getReturnTypeForCoercion(descriptor);
+            value = TranslationUtils.coerce(context, value, type);
             statement = generateInitializerForProperty(context, descriptor, value);
         }
         else if (delegate != null) {

js/js.translator/src/org/jetbrains/kotlin/js/translate/reference/ReferenceTranslator.java

@@ -31,6 +31,7 @@ import org.jetbrains.kotlin.js.descriptorUtils.DescriptorUtilsKt;
 import org.jetbrains.kotlin.js.translate.context.TranslationContext;
 import org.jetbrains.kotlin.js.translate.utils.AnnotationsUtils;
 import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
+import org.jetbrains.kotlin.js.translate.utils.TranslationUtils;
 import org.jetbrains.kotlin.name.FqNameUnsafe;
 import org.jetbrains.kotlin.psi.KtExpression;
 import org.jetbrains.kotlin.psi.KtQualifiedExpression;
@@ -84,6 +85,10 @@ public final class ReferenceTranslator {
                 if (parameter.getContainingDeclaration() instanceof AnonymousFunctionDescriptor) {
                     return DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
                 }
+                if (parameter.getContainingDeclaration() instanceof PropertySetterDescriptor) {
+                    PropertySetterDescriptor setter = (PropertySetterDescriptor) parameter.getContainingDeclaration();
+                    return TranslationUtils.getReturnTypeForCoercion(setter.getCorrespondingProperty(), false);
+                }
             }
             return ((CallableDescriptor) descriptor).getReturnType();
         }

js/js.translator/src/org/jetbrains/kotlin/js/translate/utils/TranslationUtils.java

@@ -39,6 +39,7 @@ import org.jetbrains.kotlin.js.translate.general.Translation;
 import org.jetbrains.kotlin.js.translate.reference.ReferenceTranslator;
 import org.jetbrains.kotlin.name.ClassId;
 import org.jetbrains.kotlin.name.FqName;
+import org.jetbrains.kotlin.name.FqNameUnsafe;
 import org.jetbrains.kotlin.name.Name;
 import org.jetbrains.kotlin.psi.*;
 import org.jetbrains.kotlin.resolve.BindingContext;
@@ -58,6 +59,13 @@ import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getCallableDe
 import static org.jetbrains.kotlin.js.translate.utils.JsAstUtils.*;
 
 public final class TranslationUtils {
+    private static final Set<FqNameUnsafe> CLASSES_WITH_NON_BOXED_CHARS = new HashSet<>(Arrays.asList(
+            new FqNameUnsafe("kotlin.collections.CharIterator"),
+            new FqNameUnsafe("kotlin.ranges.CharProgression"),
+            new FqNameUnsafe("kotlin.js.internal.CharCompanionObject"),
+            new FqNameUnsafe("kotlin.Char.Companion"),
+            KotlinBuiltIns.FQ_NAMES.charSequence, KotlinBuiltIns.FQ_NAMES.number
+    ));
 
     private TranslationUtils() {
     }
@@ -172,17 +180,21 @@ public final class TranslationUtils {
 
     @NotNull
     public static JsName getNameForBackingField(@NotNull TranslationContext context, @NotNull PropertyDescriptor descriptor) {
-        DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
+        if (isReferenceToSyntheticBackingField(descriptor)) {
-
-        if (!JsDescriptorUtils.isSimpleFinalProperty(descriptor) && !(containingDescriptor instanceof PackageFragmentDescriptor)) {
             return context.getNameForBackingField(descriptor);
         }
 
+        DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
         return containingDescriptor instanceof PackageFragmentDescriptor ?
                                   context.getInnerNameForDescriptor(descriptor) :
                                   context.getNameForDescriptor(descriptor);
     }
 
+    public static boolean isReferenceToSyntheticBackingField(@NotNull PropertyDescriptor descriptor) {
+        DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
+        return !JsDescriptorUtils.isSimpleFinalProperty(descriptor) && !(containingDescriptor instanceof PackageFragmentDescriptor);
+    }
+
     @NotNull
     public static JsNameRef backingFieldReference(@NotNull TranslationContext context, @NotNull PropertyDescriptor descriptor) {
         DeclarationDescriptor containingDescriptor = descriptor.getContainingDeclaration();
@@ -196,7 +208,7 @@ public final class TranslationUtils {
         }
 
         JsNameRef result = new JsNameRef(getNameForBackingField(context, descriptor), receiver);
-        MetadataProperties.setType(result, getReturnTypeForCoercion(descriptor));
+        MetadataProperties.setType(result, getReturnTypeForCoercion(descriptor, true));
 
         return result;
     }
@@ -396,25 +408,50 @@ public final class TranslationUtils {
 
     @NotNull
     public static KotlinType getReturnTypeForCoercion(@NotNull CallableDescriptor descriptor) {
+        return getReturnTypeForCoercion(descriptor, false);
+    }
+
+    @NotNull
+    public static KotlinType getReturnTypeForCoercion(@NotNull CallableDescriptor descriptor, boolean forcePrivate) {
         descriptor = descriptor.getOriginal();
 
         if (FunctionTypesKt.getFunctionalClassKind(descriptor) != null || descriptor instanceof AnonymousFunctionDescriptor) {
-            return DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
+            return getAnyTypeFromSameModule(descriptor);
         }
 
         Collection<? extends CallableDescriptor> overridden = descriptor.getOverriddenDescriptors();
         if (overridden.isEmpty()) {
-            return descriptor.getReturnType() != null ?
+            KotlinType returnType = descriptor.getReturnType();
-                   descriptor.getReturnType() :
+            if (returnType == null) {
-                   DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
+                return getAnyTypeFromSameModule(descriptor);
+            }
+
+            DeclarationDescriptor container = descriptor.getContainingDeclaration();
+            boolean isPublic = descriptor.getVisibility().effectiveVisibility(descriptor, true).getPublicApi() && !forcePrivate;
+            if (KotlinBuiltIns.isCharOrNullableChar(returnType) && container instanceof ClassDescriptor && isPublic) {
+                ClassDescriptor containingClass = (ClassDescriptor) container;
+                FqNameUnsafe containingClassName = DescriptorUtilsKt.getFqNameUnsafe(containingClass);
+                if (!CLASSES_WITH_NON_BOXED_CHARS.contains(containingClassName) &&
+                    !KotlinBuiltIns.isPrimitiveType(containingClass.getDefaultType()) &&
+                    !KotlinBuiltIns.isPrimitiveArray(containingClassName)
+                ) {
+                    return getAnyTypeFromSameModule(descriptor);
+                }
+            }
+            return returnType;
         }
 
         Set<KotlinType> typesFromOverriddenCallables = overridden.stream()
-                .map(TranslationUtils::getReturnTypeForCoercion)
+                .map(o -> getReturnTypeForCoercion(o, forcePrivate))
                 .collect(Collectors.toSet());
         return typesFromOverriddenCallables.size() == 1
                ? typesFromOverriddenCallables.iterator().next()
-               : DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
+               : getAnyTypeFromSameModule(descriptor);
+    }
+
+    @NotNull
+    private static KotlinType getAnyTypeFromSameModule(@NotNull DeclarationDescriptor descriptor) {
+        return DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
     }
 
     @NotNull
@@ -435,7 +472,7 @@ public final class TranslationUtils {
                 .collect(Collectors.toSet());
         return typesFromOverriddenCallables.size() == 1
                ? typesFromOverriddenCallables.iterator().next()
-               : DescriptorUtils.getContainingModule(descriptor).getBuiltIns().getAnyType();
+               : getAnyTypeFromSameModule(descriptor);
     }
 
     @NotNull

js/js.translator/testData/box/char/topLevelCallables.kt

@@ -0,0 +1,32 @@
+// SKIP_MINIFICATION
+fun foo(): Char = '1'
+
+val p1: Char = '2'
+
+var p2: Char = '3'
+
+var p3: Char = '4'
+    get() = field + 1
+    set(value) {
+        field = value + 1
+    }
+
+fun box(): String {
+    var root = eval("_")
+
+    var r = typeOf(root.foo())
+    if (r !== "number") return "fail1: $r"
+
+    r = typeOf(root.p1)
+    if (r !== "number") return "fail2: $r"
+
+    r = typeOf(root.p2)
+    if (r !== "number") return "fail3: $r"
+
+    r = typeOf(root.p3)
+    if (r !== "number") return "fail4: $r"
+
+    return "OK"
+}
+
+fun typeOf(x: dynamic): String = js("typeof x")

js/js.translator/testData/box/char/unboxedCharSpecials.kt

@@ -0,0 +1,24 @@
+// EXPECTED_REACHABLE_NODES: 1099
+private inline fun typeOf(x: dynamic): String = js("typeof x").unsafeCast<String>()
+
+fun box(): String {
+    val arr = charArrayOf('A')
+
+    var r = typeOf(arr.iterator().asDynamic().nextChar())
+    if (r != "number") return "fail1: $r"
+    r = typeOf(arr.iterator().asDynamic().next())
+    if (r != "object") return "fail1a: $r"
+
+    var progression = 'A'..'Z'
+    r = typeOf(progression.asDynamic().first)
+    if (r != "number") return "fail2: $r"
+    r = typeOf(progression.asDynamic().last)
+    if (r != "number") return "fail3: $r"
+
+    r = typeOf(Char.asDynamic().MIN_HIGH_SURROGATE)
+    if (r != "number") return "fail4: $r"
+
+    return "OK"
+}
+
+fun getInt() = 65

js/js.translator/testData/box/coercion/bridgeChar.kt

@@ -0,0 +1,41 @@
+// EXPECTED_REACHABLE_NODES: 1039
+open class A {
+    fun foo(): Char = 'X'
+}
+
+interface I {
+    fun foo(): Any
+}
+
+class B : A(), I
+
+fun typeOf(x: dynamic): String = js("typeof x")
+
+fun box(): String {
+    val b = B()
+    val i: I = B()
+    val a: A = B()
+
+    val r1 = typeOf(b.asDynamic().foo())
+    if (r1 != "object") return "fail1: $r1"
+
+    val r2 = typeOf(i.asDynamic().foo())
+    if (r2 != "object") return "fail2: $r2"
+
+    val r3 = typeOf(a.asDynamic().foo())
+    if (r3 != "object") return "fail3: $r3"
+
+    val x4 = b.foo()
+    val r4 = typeOf(x4)
+    if (r4 != "number") return "fail4: $r4"
+
+    val x5 = i.foo()
+    val r5 = typeOf(x5)
+    if (r5 != "object") return "fail5: $r5"
+
+    val x6 = a.foo()
+    val r6 = typeOf(x6)
+    if (r6 != "number") return "fail6: $r6"
+
+    return "OK"
+}

js/js.translator/testData/box/coercion/propertyBridgeChar.kt

@@ -0,0 +1,70 @@
+// EXPECTED_REACHABLE_NODES: 1039
+open class A {
+    val foo: Char
+        get() = 'X'
+
+    var bar: Char = 'Y'
+
+    val baz: Char = 'Q'
+
+    var mutable: Char = 'W'
+        get() {
+            typeOfMutable += typeOf(field.asDynamic()) + ";"
+            return field + 1
+        }
+        set(value) {
+            typeOfMutable += typeOf(js("value")) + ";" + typeOf(value)
+            field = value
+        }
+}
+
+interface I {
+    val foo: Any
+
+    val bar: Any
+
+    val baz: Any
+
+    val mutable: Any
+}
+
+class B : A(), I
+
+fun typeOf(x: dynamic): String = js("typeof x")
+
+var typeOfMutable = ""
+
+fun box(): String {
+    val a = B()
+    val b: I = B()
+
+    val r1 = typeOf(a.foo)
+    if (r1 != "number") return "fail1: $r1"
+
+    val r2 = typeOf(b.foo)
+    if (r2 != "object") return "fail2: $r2"
+
+    val r3 = typeOf(a.asDynamic().foo)
+    if (r3 != "object") return "fail3: $r3"
+
+    val r4 = typeOf(a.asDynamic().bar)
+    if (r4 != "object") return "fail4: $r4"
+
+    val r5 = typeOf(a.asDynamic().baz)
+    if (r5 != "object") return "fail5: $r5"
+
+    a.bar++
+    val r6 = typeOf(a.asDynamic().bar)
+    if (r6 != "object") return "fail6: $r6"
+
+    val r7 = typeOf(a.asDynamic().mutable)
+    if (r7 != "object") return "fail7: $r7"
+
+    a.mutable = 'E'
+    if (typeOfMutable != "number;object;number") return "fail8: $typeOfMutable"
+
+    val r9 = typeOf(a.mutable)
+    if (r9 != "number") return "fail9: $r9"
+
+    return "OK"
+}

js/js.translator/testData/box/expression/stringClass/subSequence.kt

@@ -6,7 +6,8 @@ class CC(val s: CharSequence) : CharSequence by s, MyCharSequence {}
 interface MyCharSequence {
     val length: Int
 
-    operator fun get(index: Int): Char
+    // TODO: uncomment when it's possible to implement bridges for get/charCodeAt
+    //operator fun get(index: Int): Char
 
     fun subSequence(startIndex: Int, endIndex: Int): CharSequence
 }
@@ -25,17 +26,17 @@ fun box(): String {
     val cc: CharSequence = CC(kotlin)
     if (cc.length != 6) return "Fail 3: ${cc.length}"
     if (cc.subSequence(0, 3) != kot) return "Fail 4"
-    if (cc[2] != 't') return "Fail 5: ${cc[2]}"
+    //if (cc[2] != 't') return "Fail 5: ${cc[2]}"
 
     val mcc: MyCharSequence = CC(kotlin)
     if (mcc.length != 6) return "Fail 6: ${mcc.length}"
     if (mcc.subSequence(0, 3) != kot) return "Fail 7"
-    if (mcc[2] != 't') return "Fail 8: ${mcc[2]}"
+    //if (mcc[2] != 't') return "Fail 8: ${mcc[2]}"
 
     val ccc = CC(cc)
     if (ccc.length != 6) return "Fail 6: ${ccc.length}"
     if (ccc.subSequence(0, 3) != kot) return "Fail 7"
-    if (ccc[2] != 't') return "Fail 8: ${ccc[2]}"
+    //if (ccc[2] != 't') return "Fail 8: ${ccc[2]}"
 
     return "OK"
 }