Check for function when parsing export async (#639)

2017-07-19 13:03:49 -05:00
parent fa4d4040dc
commit a46f87f726
3 changed files with 14 additions and 0 deletions
--- a/src/parser/statement.js
+++ b/src/parser/statement.js
@@ -1255,6 +1255,15 @@ export default class StatementParser extends ExpressionParser {
      this.checkExport(node, true, true);
      return this.finishNode(node, "ExportDefaultDeclaration");
    } else if (this.shouldParseExportDeclaration()) {
+      if (this.isContextual("async")) {
+        const next = this.lookahead();
+
+        // export async;
+        if (next.type !== tt._function) {
+          this.unexpected(next.start, "Unexpected token, expected function");
+        }
+      }
+
      node.specifiers = [];
      node.source = null;
      node.declaration = this.parseExportDeclaration(node);