LibJS: Handle empty named export

This is an export which looks like `export {} from "module"`, and
although it doesn't have any real export entries it should still add
"module" to the required modules to load.

1 files changed, 10 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/AST.h b/Userland/Libraries/LibJS/AST.h
index 13cf6f55d9..6debd070b8 100644
--- a/Userland/Libraries/LibJS/AST.h
+++ b/Userland/Libraries/LibJS/AST.h
@@ -360,6 +360,11 @@ public:
             NamedExport,
             ModuleRequestAll,
             ModuleRequestAllButDefault,
+            // EmptyNamedExport is a special type for export {} from "module",
+            // which should import the module without getting any of the exports
+            // however we don't want give it a fake export name which may get
+            // duplicates
+            EmptyNamedExport,
         } kind;
 
         FlyString export_name;          // [[ExportName]]
@@ -409,6 +414,11 @@ public:
         {
             return ExportEntry { Kind::ModuleRequestAll, move(export_name), {} };
         }
+
+        static ExportEntry empty_named_export()
+        {
+            return ExportEntry { Kind::EmptyNamedExport, {}, {} };
+        }
     };
 
     ExportStatement(SourceRange source_range, RefPtr<ASTNode> statement, Vector<ExportEntry> entries, bool is_default_export, ModuleRequest module_request)