Rework resolving references and namespace creation in modules (#4695)

- Properties of namespace objects are ordered in lexical order
- The namespace object is created and imports are bound during linking phase
- Namespace imports are changed to read-only
- Reduced memory consumption

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/es.next/module-circular-05.mjs

@@ -0,0 +1,16 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+import {a} from "./module-circular-06.mjs"
+assert(a === 6.5)

tests/jerry/es.next/module-circular-06.mjs

@@ -0,0 +1,17 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+export {b as a} from "./module-circular-07.mjs";
+import {b} from "./module-circular-07.mjs"
+assert(b === 6.5 || b === undefined)

tests/jerry/es.next/module-circular-07.mjs

@@ -0,0 +1,16 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+export * from "./module-circular-08.mjs"
+export * from "./module-circular-09.mjs"

tests/jerry/es.next/module-circular-08.mjs

@@ -0,0 +1,15 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+export {a as b} from "./module-circular-06.mjs"

tests/jerry/es.next/module-circular-09.mjs

@@ -0,0 +1,15 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// 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.
+
+export var b = 6.5

tests/jerry/es.next/module-export-09.mjs

@@ -0,0 +1,25 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * 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.
+ */
+
+/* Test sorting order */
+
+export let
+  c = 4,
+  bc = 3,
+  ddd = 6,
+  dddd = 7,
+  bb = 2,
+  dd = 5,
+  a = 1

tests/jerry/es.next/module-import-06.mjs

@@ -0,0 +1,32 @@
+/* Copyright JS Foundation and other contributors, http://js.foundation
+ *
+ * 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.
+ */
+
+import * as namespace from "module-export-09.mjs"
+
+assert(JSON.stringify(namespace) === '{"a":1,"bb":2,"bc":3,"c":4,"dd":5,"ddd":6,"dddd":7}')
+
+try {
+  namespace = 8
+  assert(false)
+} catch (e) {
+  assert(e instanceof TypeError)
+}
+
+try {
+  namespace += 8
+  assert(false)
+} catch (e) {
+  assert(e instanceof TypeError)
+}

tests/unit-core/test-module.c

@@ -64,16 +64,18 @@ create_module (int id) /**< module id */
 
   if (id == 0)
   {
-    result = jerry_parse ((jerry_char_t *) "", 0, &module_parse_options);
+    jerry_char_t source[] = "export var a = 7";
+
+    result = jerry_parse (source, sizeof (source) - 1, &module_parse_options);
   }
   else
   {
-    jerry_char_t source[] = "import a from 'XX_module.mjs'";
+    jerry_char_t source[] = "export {a} from 'XX_module.mjs'";
 
-    TEST_ASSERT (id >= 1 && id <= 99 && source[15] == 'X' && source[16] == 'X');
+    TEST_ASSERT (id >= 1 && id <= 99 && source[17] == 'X' && source[18] == 'X');
 
-    source[15] = (jerry_char_t) ((id / 10) + '0');
-    source[16] = (jerry_char_t) ((id % 10) + '0');
+    source[17] = (jerry_char_t) ((id / 10) + '0');
+    source[18] = (jerry_char_t) ((id % 10) + '0');
 
     result = jerry_parse (source, sizeof (source) - 1, &module_parse_options);
   }