8019629: void operator should always evaluate to undefined

Wed, 03 Jul 2013 00:08:45 +0530

author
sundar
date
Wed, 03 Jul 2013 00:08:45 +0530
changeset 401
313bdcd2fd22
parent 396
69ec02d12a31
child 402
9d3a9fdab668

8019629: void operator should always evaluate to undefined
Reviewed-by: jlaskey

src/jdk/nashorn/internal/codegen/Attr.java file | annotate | diff | comparison | revisions
src/jdk/nashorn/internal/codegen/CodeGenerator.java file | annotate | diff | comparison | revisions
src/jdk/nashorn/internal/ir/RuntimeNode.java file | annotate | diff | comparison | revisions
src/jdk/nashorn/internal/runtime/ScriptRuntime.java file | annotate | diff | comparison | revisions
test/script/basic/JDK-8019629.js file | annotate | diff | comparison | revisions
     1.1 --- a/src/jdk/nashorn/internal/codegen/Attr.java	Tue Jul 02 15:01:38 2013 +0200
     1.2 +++ b/src/jdk/nashorn/internal/codegen/Attr.java	Wed Jul 03 00:08:45 2013 +0530
     1.3 @@ -1009,10 +1009,7 @@
     1.4  
     1.5      @Override
     1.6      public Node leaveVOID(final UnaryNode unaryNode) {
     1.7 -        final RuntimeNode runtimeNode = (RuntimeNode)new RuntimeNode(unaryNode, Request.VOID).accept(this);
     1.8 -        assert runtimeNode.getSymbol().getSymbolType().isObject();
     1.9 -        end(unaryNode);
    1.10 -        return runtimeNode;
    1.11 +        return end(ensureSymbol(Type.OBJECT, unaryNode));
    1.12      }
    1.13  
    1.14      /**
     2.1 --- a/src/jdk/nashorn/internal/codegen/CodeGenerator.java	Tue Jul 02 15:01:38 2013 +0200
     2.2 +++ b/src/jdk/nashorn/internal/codegen/CodeGenerator.java	Wed Jul 03 00:08:45 2013 +0530
     2.3 @@ -2335,6 +2335,14 @@
     2.4          return false;
     2.5      }
     2.6  
     2.7 +    @Override
     2.8 +    public boolean enterVOID(final UnaryNode unaryNode) {
     2.9 +        load(unaryNode.rhs()).pop();
    2.10 +        method.loadUndefined(Type.OBJECT);
    2.11 +
    2.12 +        return false;
    2.13 +    }
    2.14 +
    2.15      private Node enterNumericAdd(final Node lhs, final Node rhs, final Type type, final Symbol symbol) {
    2.16          assert lhs.getType().equals(rhs.getType()) && lhs.getType().equals(type) : lhs.getType() + " != " + rhs.getType() + " != " + type + " " + new ASTWriter(lhs) + " " + new ASTWriter(rhs);
    2.17          load(lhs);
     3.1 --- a/src/jdk/nashorn/internal/ir/RuntimeNode.java	Tue Jul 02 15:01:38 2013 +0200
     3.2 +++ b/src/jdk/nashorn/internal/ir/RuntimeNode.java	Wed Jul 03 00:08:45 2013 +0530
     3.3 @@ -53,8 +53,6 @@
     3.4          NEW,
     3.5          /** Typeof operator */
     3.6          TYPEOF,
     3.7 -        /** void type */
     3.8 -        VOID,
     3.9          /** Reference error type */
    3.10          REFERENCE_ERROR,
    3.11          /** Delete operator */
     4.1 --- a/src/jdk/nashorn/internal/runtime/ScriptRuntime.java	Tue Jul 02 15:01:38 2013 +0200
     4.2 +++ b/src/jdk/nashorn/internal/runtime/ScriptRuntime.java	Wed Jul 03 00:08:45 2013 +0530
     4.3 @@ -601,23 +601,6 @@
     4.4      }
     4.5  
     4.6      /**
     4.7 -     * ECMA 11.4.2 - void operator
     4.8 -     *
     4.9 -     * @param object object to evaluate
    4.10 -     *
    4.11 -     * @return Undefined as the object type
    4.12 -     */
    4.13 -    public static Object VOID(final Object object) {
    4.14 -        if (object instanceof Number) {
    4.15 -            if (Double.isNaN(((Number)object).doubleValue())) {
    4.16 -                return Double.NaN;
    4.17 -            }
    4.18 -        }
    4.19 -
    4.20 -        return UNDEFINED;
    4.21 -    }
    4.22 -
    4.23 -    /**
    4.24       * Throw ReferenceError when LHS of assignment or increment/decrement
    4.25       * operator is not an assignable node (say a literal)
    4.26       *
     5.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     5.2 +++ b/test/script/basic/JDK-8019629.js	Wed Jul 03 00:08:45 2013 +0530
     5.3 @@ -0,0 +1,42 @@
     5.4 +/*
     5.5 + * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
     5.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     5.7 + * 
     5.8 + * This code is free software; you can redistribute it and/or modify it
     5.9 + * under the terms of the GNU General Public License version 2 only, as
    5.10 + * published by the Free Software Foundation.
    5.11 + * 
    5.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    5.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    5.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    5.15 + * version 2 for more details (a copy is included in the LICENSE file that
    5.16 + * accompanied this code).
    5.17 + * 
    5.18 + * You should have received a copy of the GNU General Public License version
    5.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    5.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    5.21 + * 
    5.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    5.23 + * or visit www.oracle.com if you need additional information or have any
    5.24 + * questions.
    5.25 + */
    5.26 +
    5.27 +/**
    5.28 + * JDK-8019629: void operator should always evaluate to undefined 
    5.29 + *
    5.30 + * @test
    5.31 + * @run
    5.32 + */
    5.33 +
    5.34 +function check(str) {
    5.35 +    var val = eval(str);
    5.36 +    if (typeof val !== 'undefined') {
    5.37 +        print("FAILED: " + str + " does not evaluate to 'undefined'");
    5.38 +    }
    5.39 +}
    5.40 +
    5.41 +check("void +this");
    5.42 +check("void +(void 0)");
    5.43 +check("(function f(){return void +(void 0)})()");
    5.44 +check("void function() {}");
    5.45 +

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