KT-12877: add some front-end diagnostics for JsModule

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

@@ -34,7 +34,7 @@ object JsPlatformConfigurator : PlatformConfigurator(
         DynamicTypesAllowed(),
         additionalDeclarationCheckers = listOf(
                 NativeInvokeChecker(), NativeGetterChecker(), NativeSetterChecker(), NativeInnerClassChecker(),
-                JsNameChecker,
+                JsNameChecker, JsModuleChecker,
                 PlatformImplDeclarationChecker()
         ),
         additionalCallCheckers = listOf(ReifiedTypeParameterSubstitutionChecker()),

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

@@ -48,6 +48,8 @@ private val DIAGNOSTIC_FACTORY_TO_RENDERER by lazy {
         put(ErrorsJs.JS_NAME_PROHIBITED_FOR_OVERRIDE, "@JsName is prohibited for overridden members")
         put(ErrorsJs.JS_NAME_PROHIBITED_FOR_EXTENSION_PROPERTY, "@JsName is prohibited for extension properties")
         put(ErrorsJs.JS_NAME_PROHIBITED_FOR_NAMED_NATIVE, "@JsName is prohibited for @native declaration with explicit name")
+        put(ErrorsJs.JS_MODULE_PROHIBITED_ON_VAR, "@JsModule annotation prohibited for 'var' declarations. Use 'val' instead.")
+        put(ErrorsJs.JS_MODULE_PROHIBITED_ON_NON_NATIVE, "@JsModule annotation prohibited for non-@native declarations.")
         put(ErrorsJs.CANNOT_CHECK_FOR_NATIVE_INTERFACE, "Cannot check for native interface: {0}", RENDER_TYPE)
         put(ErrorsJs.UNCHECKED_CAST_TO_NATIVE_INTERFACE, "Unchecked cast to native interface: {0} to {1}", RENDER_TYPE, RENDER_TYPE)
         put(ErrorsJs.NATIVE_INTERFACE_AS_REIFIED_TYPE_ARGUMENT, "Cannot pass native interface {0} for reified type parameter", RENDER_TYPE)

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

@@ -52,6 +52,8 @@ public interface ErrorsJs {
     DiagnosticFactory0<PsiElement> JS_NAME_PROHIBITED_FOR_OVERRIDE = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> JS_NAME_PROHIBITED_FOR_EXTENSION_PROPERTY = DiagnosticFactory0.create(ERROR);
     DiagnosticFactory0<PsiElement> JS_NAME_PROHIBITED_FOR_NAMED_NATIVE = DiagnosticFactory0.create(ERROR);
+    DiagnosticFactory0<KtElement> JS_MODULE_PROHIBITED_ON_VAR = DiagnosticFactory0.create(ERROR, DECLARATION_SIGNATURE_OR_DEFAULT);
+    DiagnosticFactory0<KtElement> JS_MODULE_PROHIBITED_ON_NON_NATIVE = DiagnosticFactory0.create(ERROR, DECLARATION_SIGNATURE_OR_DEFAULT);
     DiagnosticFactory1<PsiElement, KotlinType> CANNOT_CHECK_FOR_NATIVE_INTERFACE = DiagnosticFactory1.create(ERROR);
     DiagnosticFactory2<PsiElement, KotlinType, KotlinType> UNCHECKED_CAST_TO_NATIVE_INTERFACE = DiagnosticFactory2.create(WARNING);
     DiagnosticFactory1<PsiElement, KotlinType> NATIVE_INTERFACE_AS_REIFIED_TYPE_ARGUMENT = DiagnosticFactory1.create(ERROR);

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

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2010-2016 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.DeclarationDescriptor
+import org.jetbrains.kotlin.descriptors.PropertyDescriptor
+import org.jetbrains.kotlin.diagnostics.DiagnosticSink
+import org.jetbrains.kotlin.js.translate.utils.AnnotationsUtils
+import org.jetbrains.kotlin.psi.KtDeclaration
+import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.checkers.SimpleDeclarationChecker
+
+object JsModuleChecker : SimpleDeclarationChecker {
+    override fun check(
+            declaration: KtDeclaration,
+            descriptor: DeclarationDescriptor,
+            diagnosticHolder: DiagnosticSink,
+            bindingContext: BindingContext
+    ) {
+        val moduleName = AnnotationsUtils.getModuleName(descriptor)
+
+        if (moduleName != null && descriptor is PropertyDescriptor && descriptor.isVar) {
+            diagnosticHolder.report(ErrorsJs.JS_MODULE_PROHIBITED_ON_VAR.on(declaration))
+        }
+
+        if (moduleName != null && !AnnotationsUtils.isNativeObject(descriptor)) {
+            diagnosticHolder.report(ErrorsJs.JS_MODULE_PROHIBITED_ON_NON_NATIVE.on(declaration))
+        }
+    }
+}