fix export default expression; (#1932)

lib/parse.js

@@ -2302,8 +2302,7 @@ function parse($TEXT, options) {
         if (is("keyword", "default")) {
             is_default = true;
             next();
-        }
-
+        } else {
             exported_names = import_names(false);
 
             if (exported_names) {
@@ -2337,6 +2336,7 @@ function parse($TEXT, options) {
                     });
                 }
             }
+        }
 
         var is_definition =
             is("keyword", "var") || is("keyword", "let") || is("keyword", "const") ||

lib/transform.js

@@ -239,6 +239,10 @@ TreeTransformer.prototype = new TreeWalker;
         self.expression = self.expression.transform(tw);
     });
 
+    _(AST_Export, function(self, tw){
+        if (self.exported_value) self.exported_value = self.exported_value.transform(tw);
+    });
+
     _(AST_TemplateString, function(self, tw) {
         for (var i = 0; i < self.segments.length; i++) {
             if (!(self.segments[i] instanceof AST_TemplateSegment)) {

test/compress/harmony.js

@@ -203,15 +203,42 @@ import_all_statement: {
 }
 
 export_statement: {
+    options = {
+        evaluate: true,
+    }
     input: {
-        export default 1;
+        export default 1 + 2;
         export var foo = 4;
         export let foo = 6;
         export const foo = 6;
         export function foo() {};
         export class foo { };
     }
-    expect_exact: "export default 1;export var foo=4;export let foo=6;export const foo=6;export function foo(){};export class foo{};"
+    expect_exact: "export default 3;export var foo=4;export let foo=6;export const foo=6;export function foo(){};export class foo{};"
+}
+
+export_default_object_expression: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        export default {
+            foo: 1 + 2,
+            bar() { return 4; },
+            get baz() { return this.foo; },
+        };
+    }
+    expect_exact: "export default{foo:3,bar(){return 4},get baz(){return this.foo}};"
+}
+
+export_default_array: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        export default [ 1 + 2, foo ];
+    }
+    expect_exact: "export default[3,foo];"
 }
 
 export_module_statement: {