1/*
2 * Copyright (C) 2012, 2013 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26
27#ifndef ParserModes_h
28#define ParserModes_h
29
30#include "Identifier.h"
31
32namespace JSC {
33
34enum JSParserStrictness { JSParseNormal, JSParseBuiltin, JSParseStrict };
35enum JSParserMode { JSParseProgramCode, JSParseFunctionCode };
36
37enum ProfilerMode { ProfilerOff, ProfilerOn };
38enum DebuggerMode { DebuggerOff, DebuggerOn };
39
40enum FunctionMode { FunctionExpression, FunctionDeclaration };
41
42inline bool functionNameIsInScope(const Identifier& name, FunctionMode functionMode)
43{
44    if (name.isNull())
45        return false;
46
47    if (functionMode != FunctionExpression)
48        return false;
49
50    return true;
51}
52
53inline bool functionNameScopeIsDynamic(bool usesEval, bool isStrictMode)
54{
55    // If non-strict eval is in play, a function gets a separate object in the scope chain for its name.
56    // This enables eval to declare and then delete a name that shadows the function's name.
57
58    if (!usesEval)
59        return false;
60
61    if (isStrictMode)
62        return false;
63
64    return true;
65}
66
67typedef unsigned CodeFeatures;
68
69const CodeFeatures NoFeatures = 0;
70const CodeFeatures EvalFeature = 1 << 0;
71const CodeFeatures ArgumentsFeature = 1 << 1;
72const CodeFeatures WithFeature = 1 << 2;
73const CodeFeatures CatchFeature = 1 << 3;
74const CodeFeatures ThisFeature = 1 << 4;
75const CodeFeatures StrictModeFeature = 1 << 5;
76const CodeFeatures ShadowsArgumentsFeature = 1 << 6;
77const CodeFeatures ModifiedParameterFeature = 1 << 7;
78
79const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | CatchFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ModifiedParameterFeature;
80
81} // namespace JSC
82
83#endif // ParserModes_h
84