Merge 2aed51a95a into 569757d14d

lib/output.js

@@ -773,6 +773,7 @@ function OutputStream(options) {
             || p instanceof AST_Expansion                     // [...(a, b)]
             || p instanceof AST_ForOf && this === p.object    // for (e of (foo, bar)) {}
             || p instanceof AST_Yield                         // yield (foo, bar)
+            || p instanceof AST_Export                        // export default (foo, bar)
         ;
     });
 
@@ -844,7 +845,8 @@ function OutputStream(options) {
 
     PARENS(AST_Call, function(output){
         var p = output.parent(), p1;
-        if (p instanceof AST_New && p.expression === this)
+        if (p instanceof AST_New && p.expression === this
+            || p instanceof AST_Export && p.is_default && this.expression instanceof AST_Function)
             return true;
 
         // workaround for Safari bug.

test/compress/export.js

@@ -280,6 +280,13 @@ export_default_anonymous_function: {
     expect_exact: "export default function(){foo()};"
 }
 
+export_default_seq: {
+    input: {
+        export default (1, 2)
+    }
+    expect_exact: "export default(1,2);"
+}
+
 export_default_arrow: {
     options = {
         reduce_vars: true,
@@ -410,7 +417,7 @@ export_default_anonymous_function_not_call: {
         export default function(){}(foo);
     }
     // FIXME: should be `export default function(){};foo;`
-    expect_exact: "export default function(){}(foo);"
+    expect_exact: "export default(function(){}(foo));"
 }
 
 export_default_anonymous_generator_not_call: {
@@ -444,3 +451,10 @@ export_default_anonymous_async_function_not_call: {
     // agrees with `acorn` and `babylon 7`
     expect_exact: "export default async function(){};foo;"
 }
+
+issue_2977: {
+    input: {
+        export default (function () {})();
+    }
+    expect_exact: "export default(function(){}());"
+}