Recover from exported using declaration (#16407)

packages/babel-parser/src/parse-error/standard-errors.ts

@@ -313,6 +313,7 @@ export default {
   UnterminatedRegExp: "Unterminated regular expression.",
   UnterminatedString: "Unterminated string constant.",
   UnterminatedTemplate: "Unterminated template.",
+  UsingDeclarationExport: "Using declaration cannot be exported.",
   UsingDeclarationHasBindingPattern:
     "Using declaration cannot have destructuring patterns.",
   VarRedeclaration: ({ identifierName }: { identifierName: string }) =>

packages/babel-parser/src/parser/statement.ts

@@ -2649,6 +2649,16 @@ export default abstract class StatementParser extends ExpressionParser {
       }
     }
 
+    if (this.isContextual(tt._using)) {
+      this.raise(Errors.UsingDeclarationExport, this.state.startLoc);
+      return true;
+    }
+
+    if (this.isContextual(tt._await) && this.startsAwaitUsing()) {
+      this.raise(Errors.UsingDeclarationExport, this.state.startLoc);
+      return true;
+    }
+
     return (
       type === tt._var ||
       type === tt._const ||

packages/babel-parser/test/fixtures/experimental/async-explicit-resource-management/invalid-export-await-using/options.json

@@ -1,4 +1,3 @@
 {
-  "sourceType": "module",
-  "throws": "Unexpected token, expected \"{\" (1:7)"
+  "sourceType": "module"
 }

packages/babel-parser/test/fixtures/experimental/async-explicit-resource-management/invalid-export-await-using/output.json

@@ -0,0 +1,48 @@
+{
+  "type": "File",
+  "start":0,"end":36,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":36,"index":36}},
+  "errors": [
+    "SyntaxError: Using declaration cannot be exported. (1:7)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":36,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":36,"index":36}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExportNamedDeclaration",
+        "start":0,"end":36,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":36,"index":36}},
+        "specifiers": [],
+        "source": null,
+        "declaration": {
+          "type": "VariableDeclaration",
+          "start":7,"end":36,"loc":{"start":{"line":1,"column":7,"index":7},"end":{"line":1,"column":36,"index":36}},
+          "declarations": [
+            {
+              "type": "VariableDeclarator",
+              "start":19,"end":35,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":35,"index":35}},
+              "id": {
+                "type": "Identifier",
+                "start":19,"end":24,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":24,"index":24},"identifierName":"basic"},
+                "name": "basic"
+              },
+              "init": {
+                "type": "CallExpression",
+                "start":27,"end":35,"loc":{"start":{"line":1,"column":27,"index":27},"end":{"line":1,"column":35,"index":35}},
+                "callee": {
+                  "type": "Identifier",
+                  "start":27,"end":33,"loc":{"start":{"line":1,"column":27,"index":27},"end":{"line":1,"column":33,"index":33},"identifierName":"reader"},
+                  "name": "reader"
+                },
+                "arguments": []
+              }
+            }
+          ],
+          "kind": "await using"
+        }
+      }
+    ],
+    "directives": []
+  }
+}

packages/babel-parser/test/fixtures/experimental/explicit-resource-management/invalid-export-using/input.js

@@ -0,0 +1 @@
+export using basic = reader();

packages/babel-parser/test/fixtures/experimental/explicit-resource-management/invalid-export-using/options.json

@@ -0,0 +1,3 @@
+{
+  "sourceType": "module"
+}

packages/babel-parser/test/fixtures/experimental/explicit-resource-management/invalid-export-using/output.json

@@ -0,0 +1,48 @@
+{
+  "type": "File",
+  "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+  "errors": [
+    "SyntaxError: Using declaration cannot be exported. (1:7)"
+  ],
+  "program": {
+    "type": "Program",
+    "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExportNamedDeclaration",
+        "start":0,"end":30,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":30,"index":30}},
+        "specifiers": [],
+        "source": null,
+        "declaration": {
+          "type": "VariableDeclaration",
+          "start":7,"end":30,"loc":{"start":{"line":1,"column":7,"index":7},"end":{"line":1,"column":30,"index":30}},
+          "declarations": [
+            {
+              "type": "VariableDeclarator",
+              "start":13,"end":29,"loc":{"start":{"line":1,"column":13,"index":13},"end":{"line":1,"column":29,"index":29}},
+              "id": {
+                "type": "Identifier",
+                "start":13,"end":18,"loc":{"start":{"line":1,"column":13,"index":13},"end":{"line":1,"column":18,"index":18},"identifierName":"basic"},
+                "name": "basic"
+              },
+              "init": {
+                "type": "CallExpression",
+                "start":21,"end":29,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":29,"index":29}},
+                "callee": {
+                  "type": "Identifier",
+                  "start":21,"end":27,"loc":{"start":{"line":1,"column":21,"index":21},"end":{"line":1,"column":27,"index":27},"identifierName":"reader"},
+                  "name": "reader"
+                },
+                "arguments": []
+              }
+            }
+          ],
+          "kind": "using"
+        }
+      }
+    ],
+    "directives": []
+  }
+}