Implement new.target

lib/ast.js

@@ -1003,6 +1003,10 @@ var AST_Symbol = DEFNODE("Symbol", "scope name thedef", {
     $documentation: "Base class for all symbols",
 });
 
+var AST_NewTarget = DEFNODE("NewTarget", null, {
+    $documentation: "A reference to new.target"
+});
+
 var AST_SymbolAccessor = DEFNODE("SymbolAccessor", null, {
     $documentation: "The name of a property accessor (setter/getter function)"
 }, AST_Symbol);

lib/output.js

@@ -1219,6 +1219,9 @@ function OutputStream(options) {
         });
         else output.print("{}");
     });
+    DEFPRINT(AST_NewTarget, function(self, output) {
+        output.print("new.target");
+    });
     DEFPRINT(AST_ObjectKeyVal, function(self, output){
         var key = self.key;
         var quote = self.quote;

lib/parse.js

@@ -1292,6 +1292,14 @@ function parse($TEXT, options) {
     var new_ = function(allow_calls) {
         var start = S.token;
         expect_token("operator", "new");
+        if (is("punc", ".")) {
+            next();
+            expect_token("name");
+            return subscripts(new AST_NewTarget({
+                start : start,
+                end   : prev()
+            }), allow_calls);
+        }
         var newexp = expr_atom(false), args;
         if (is("punc", "(")) {
             next();

test/compress/harmony.js

@@ -251,6 +251,14 @@ class_name_can_be_preserved: {
     }
 }
 
+new_target: {
+    input: {
+        new.target;
+        new.target.name;
+    }
+    expect_exact: "new.target;new.target.name;"
+}
+
 number_literals: {
     input: {
         0b1001;