1  /*
 2   * Copyright (C) 2012-2015 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. ``AS IS'' AND ANY
14   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24   */
25  
26  #pragma once
27  
28  #include "ParserModes.h"
29  
30  namespace JSC {
31      
32  enum class DerivedContextType : uint8_t { None, DerivedConstructorContext, DerivedMethodContext };
33  enum class EvalContextType    : uint8_t { None, FunctionEvalContext, InstanceFieldEvalContext };
34  enum class NeedsClassFieldInitializer : uint8_t { No, Yes };
35  
36  // FIXME: These flags, ParserModes and propagation to XXXCodeBlocks should be reorganized.
37  // https://bugs.webkit.org/show_bug.cgi?id=151547
38  struct ExecutableInfo {
39      ExecutableInfo(bool usesEval, bool isConstructor, bool isBuiltinFunction, ConstructorKind constructorKind, JSParserScriptMode scriptMode, SuperBinding superBinding, SourceParseMode parseMode, DerivedContextType derivedContextType, NeedsClassFieldInitializer needsClassFieldInitializer, bool isArrowFunctionContext, bool isClassContext, EvalContextType evalContextType)
40          : m_usesEval(usesEval)
41          , m_isConstructor(isConstructor)
42          , m_isBuiltinFunction(isBuiltinFunction)
43          , m_constructorKind(static_cast<unsigned>(constructorKind))
44          , m_superBinding(static_cast<unsigned>(superBinding))
45          , m_scriptMode(static_cast<unsigned>(scriptMode))
46          , m_parseMode(parseMode)
47          , m_derivedContextType(static_cast<unsigned>(derivedContextType))
48          , m_needsClassFieldInitializer(static_cast<unsigned>(needsClassFieldInitializer))
49          , m_isArrowFunctionContext(isArrowFunctionContext)
50          , m_isClassContext(isClassContext)
51          , m_evalContextType(static_cast<unsigned>(evalContextType))
52      {
53          ASSERT(m_constructorKind == static_cast<unsigned>(constructorKind));
54          ASSERT(m_superBinding == static_cast<unsigned>(superBinding));
55          ASSERT(m_scriptMode == static_cast<unsigned>(scriptMode));
56      }
57  
58      bool usesEval() const { return m_usesEval; }
59      bool isConstructor() const { return m_isConstructor; }
60      bool isBuiltinFunction() const { return m_isBuiltinFunction; }
61      ConstructorKind constructorKind() const { return static_cast<ConstructorKind>(m_constructorKind); }
62      SuperBinding superBinding() const { return static_cast<SuperBinding>(m_superBinding); }
63      JSParserScriptMode scriptMode() const { return static_cast<JSParserScriptMode>(m_scriptMode); }
64      SourceParseMode parseMode() const { return m_parseMode; }
65      DerivedContextType derivedContextType() const { return static_cast<DerivedContextType>(m_derivedContextType); }
66      EvalContextType evalContextType() const { return static_cast<EvalContextType>(m_evalContextType); }
67      bool isArrowFunctionContext() const { return m_isArrowFunctionContext; }
68      bool isClassContext() const { return m_isClassContext; }
69      NeedsClassFieldInitializer needsClassFieldInitializer() const { return static_cast<NeedsClassFieldInitializer>(m_needsClassFieldInitializer); }
70  
71  private:
72      unsigned m_usesEval : 1;
73      unsigned m_isConstructor : 1;
74      unsigned m_isBuiltinFunction : 1;
75      unsigned m_constructorKind : 2;
76      unsigned m_superBinding : 1;
77      unsigned m_scriptMode: 1;
78      SourceParseMode m_parseMode;
79      unsigned m_derivedContextType : 2;
80      unsigned m_needsClassFieldInitializer : 1;
81      unsigned m_isArrowFunctionContext : 1;
82      unsigned m_isClassContext : 1;
83      unsigned m_evalContextType : 2;
84  };
85  
86  } // namespace JSC