Handle super like this

Close estools#50

src/scope.js

@@ -315,13 +315,19 @@ export default class Scope {
     }
 
     __referencing(node, assign, writeExpr, maybeImplicitGlobal, partial) {
-        var ref;
         // because Array element may be null
-        if (node && node.type === Syntax.Identifier) {
-            ref = new Reference(node, this, assign || Reference.READ, writeExpr, maybeImplicitGlobal, !!partial);
-            this.references.push(ref);
-            this.__left.push(ref);
+        if (!node || node.type !== Syntax.Identifier) {
+            return;
+        }
+
+        // Specially handle like `this`.
+        if (node.name === 'super') {
+            return;
         }
+
+        let ref = new Reference(node, this, assign || Reference.READ, writeExpr, maybeImplicitGlobal, !!partial);
+        this.references.push(ref);
+        this.__left.push(ref);
     }
 
     __detectEval() {

test/es6-super.coffee

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+#  Copyright (C) 2015 Yusuke Suzuki <[email protected]>
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions are met:
+#
+#    * Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#    * Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in the
+#      documentation and/or other materials provided with the distribution.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+#  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+#  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+#  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+#  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+#  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+expect = require('chai').expect
+harmony = require '../third_party/esprima'
+escope = require '..'
+
+describe 'ES6 super', ->
+    it 'is not handled as reference', ->
+        ast = harmony.parse """
+        class Hello {
+            constructor() {
+                super();
+            }
+
+            method() {
+                super.method();
+            }
+        }
+        """
+
+        scopeManager = escope.analyze ast, ecmaVersion: 6
+        expect(scopeManager.scopes).to.have.length 4
+
+        scope = scopeManager.scopes[0]
+        expect(scope.type).to.be.equal 'global'
+        expect(scope.variables).to.have.length 1
+        expect(scope.variables[0].name).to.be.equal 'Hello'
+        expect(scope.references).to.have.length 0
+
+        scope = scopeManager.scopes[1]
+        expect(scope.type).to.be.equal 'class'
+        expect(scope.variables).to.have.length 1
+        expect(scope.variables[0].name).to.be.equal 'Hello'
+        expect(scope.references).to.have.length 0
+
+        scope = scopeManager.scopes[2]
+        expect(scope.type).to.be.equal 'function'
+        expect(scope.variables).to.have.length 1
+        expect(scope.variables[0].name).to.be.equal 'arguments'
+        expect(scope.references).to.have.length 0  # super is specially handled like `this`.
+
+        scope = scopeManager.scopes[3]
+        expect(scope.type).to.be.equal 'function'
+        expect(scope.variables).to.have.length 1
+        expect(scope.variables[0].name).to.be.equal 'arguments'
+        expect(scope.references).to.have.length 0  # super is specially handled like `this`.
+
+# vim: set sw=4 ts=4 et tw=80 :