[[FEAT]] Add support for "export * as ns from"

Author: jugglinmike

src/jshint.js

@@ -5631,7 +5631,18 @@ var JSHINT = (function() {
 
     if (state.tokens.next.value === "*") {
       // ExportDeclaration :: export * FromClause
+      // ExportDeclaration :: export * as IdentifierName FromClause
       advance("*");
+
+      if (state.tokens.next.value === "as") {
+        if (!state.inES11()) {
+          warning("W119", state.tokens.curr, "export * as ns from", "11");
+        }
+        advance("as");
+        identifier(context, true);
+        state.funct["(scope)"].setExported(null, state.tokens.curr);
+      }
+
       advance("from");
       advance("(string)");
       return this;

src/options.js

@@ -1051,7 +1051,8 @@ exports.val = {
    *  - `10` - To enable language features introduced by [ECMAScript
    *    10](https://www.ecma-international.org/ecma-262/10.0/index.html).
    *    Notable additions: optional catch bindings.
-   *  - `11` - To enable language features introduced by ECMAScript 11.
+   *  - `11` - To enable language features introduced by ECMAScript 11. Notable
+   *    additions: "export * as ns from 'module'".
    */
   esversion: 5
 };

tests/test262/expectations.txt

@@ -1382,14 +1382,6 @@ test/language/comments/multi-line-asi-line-separator.js(default)
 test/language/comments/multi-line-asi-line-separator.js(strict mode)
 test/language/comments/multi-line-asi-paragraph-separator.js(default)
 test/language/comments/multi-line-asi-paragraph-separator.js(strict mode)
-test/language/module-code/eval-rqstd-once.js(default)
-test/language/module-code/eval-rqstd-once.js(strict mode)
-test/language/module-code/eval-rqstd-order.js(default)
-test/language/module-code/eval-rqstd-order.js(strict mode)
-test/language/module-code/eval-self-once.js(default)
-test/language/module-code/eval-self-once.js(strict mode)
-test/language/module-code/instn-once.js(default)
-test/language/module-code/instn-once.js(strict mode)
 test/language/module-code/privatename-valid-no-earlyerr.js(default)
 test/language/module-code/privatename-valid-no-earlyerr.js(strict mode)
 test/annexB/language/comments/single-line-html-close-unicode-separators.js(default)
@@ -8998,8 +8990,6 @@ test/language/identifiers/start-unicode-9.0.0-escaped.js(default)
 test/language/identifiers/start-unicode-9.0.0-escaped.js(strict mode)
 test/language/identifiers/start-unicode-9.0.0.js(default)
 test/language/identifiers/start-unicode-9.0.0.js(strict mode)
-test/language/module-code/export-star-as-dflt.js(default)
-test/language/module-code/export-star-as-dflt.js(strict mode)
 test/language/statementList/block-array-literal-with-item.js(default)
 test/language/statementList/block-array-literal.js(default)
 test/language/statementList/block-arrow-function-assignment-expr.js(default)

tests/unit/core.js

@@ -1107,6 +1107,33 @@ exports.testES6ModuleDuplicateExport = function (test) {
   test.done();
 };
 
+exports.testExportStar = function (test) {
+  TestRun(test, "rejects earlier language editions")
+    .addError(1, 8, "'export * as ns from' is only available in ES11 (use 'esversion: 11').")
+    .test([
+      "export * as x from '.';"
+    ], { esversion: 10, module: true });
+
+  TestRun(test, "minimal esversion")
+    .test([
+      "export * as x from '.';"
+    ], { esversion: 11, module: true });
+
+  TestRun(test, "tolerates any IdentifierName")
+    .test([
+      "export * as if from '.';"
+    ], { esversion: 11, module: true });
+
+  TestRun(test, "detects duplicate bindings")
+    .addError(2, 13, "Duplicate exported binding: 'x'.")
+    .test([
+      "export * as x from '.';",
+      "export * as x from '.';"
+    ], { esversion: 11, module: true });
+
+  test.done();
+};
+
 exports.testES6ModulesNamedExportsAffectUnused = function (test) {
   // Named Exports should count as used
   var src1 = [