Starting out the import statement

lib/ast.js

@@ -702,6 +702,13 @@ var AST_Const = DEFNODE("Const", null, {
     $documentation: "A `const` statement"
 }, AST_Definitions);
 
+var AST_Import = DEFNODE("Import", "module_name", {
+    $documentation: "An `import` statement",
+    $propdoc: {
+        module_name: "[AST_String] String literal describing where this module came from",
+    }
+});
+
 var AST_VarDef = DEFNODE("VarDef", "name value", {
     $documentation: "A variable declaration; only appears in a AST_Definitions node",
     $propdoc: {

lib/output.js

@@ -1037,6 +1037,12 @@ function OutputStream(options) {
     DEFPRINT(AST_Const, function(self, output){
         self._do_print(output, "const");
     });
+    DEFPRINT(AST_Import, function(self, output) {
+        output.print("import");
+        output.space();
+        self.module_name.print(output);
+        output.semicolon();
+    });
 
     function parenthesize_for_noin(node, output, noin) {
         if (!noin) node.print(output);

lib/parse.js

@@ -44,9 +44,9 @@
 
 "use strict";
 
-var KEYWORDS = 'break case catch class const continue debugger default delete do else extends finally for function if in instanceof new return switch throw try typeof var let void while with';
+var KEYWORDS = 'break case catch class const continue debugger default delete do else extends finally for function if in instanceof new return switch throw try typeof var let void while with import';
 var KEYWORDS_ATOM = 'false null true';
-var RESERVED_WORDS = 'abstract boolean byte char double enum export final float goto implements import int interface long native package private protected public short static super synchronized this throws transient volatile yield'
+var RESERVED_WORDS = 'abstract boolean byte char double enum export final float goto implements int interface long native package private protected public short static super synchronized this throws transient volatile yield'
     + " " + KEYWORDS_ATOM + " " + KEYWORDS;
 var KEYWORDS_BEFORE_EXPRESSION = 'return new delete throw else case';
 
@@ -909,6 +909,9 @@ function parse($TEXT, options) {
                     body       : statement()
                 });
 
+              case "import":
+                return tmp = import_(), semicolon(), tmp;
+
               default:
                 unexpected();
             }
@@ -1607,6 +1610,19 @@ function parse($TEXT, options) {
         }
     }
 
+    function import_() {
+        return new AST_Import({
+            start: prev(),
+            module_name: new AST_String({
+                start : S.token,
+                value : S.token.value,
+                quote : S.token.quote,
+                end   : S.token,
+            }),
+            end: next(),
+        });
+    }
+
     function as_property_name() {
         var tmp = S.token;
         next();

test/compress/harmony.js

@@ -305,6 +305,14 @@ number_literals: {
     }
 }
 
+import_statement: {
+    input: {
+        import "mod-name";
+        import "module2";
+    }
+    expect_exact: "import\"mod-name\";import\"module2\";"
+}
+
 // Fabio: My patches accidentally caused a crash whenever
 // there's an extraneous set of parens around an object.
 regression_cannot_destructure: {