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/*
* Copyright (C) 2012, 2013, 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS
* 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.
*/
#ifndef ParserModes_h
#define ParserModes_h
#include "Identifier.h"
namespace JSC {
enum class JSParserStrictMode { NotStrict, Strict };
enum class JSParserBuiltinMode { NotBuiltin, Builtin };
enum class JSParserCodeType { Program, Function, Module };
enum class ConstructorKind { None, Base, Derived };
enum class SuperBinding { Needed, NotNeeded };
enum class ThisTDZMode { AlwaysCheck, CheckIfNeeded };
enum ProfilerMode { ProfilerOff, ProfilerOn };
enum DebuggerMode { DebuggerOff, DebuggerOn };
enum FunctionMode { FunctionExpression, FunctionDeclaration };
enum class SourceParseMode : uint8_t {
NormalFunctionMode,
GeneratorBodyMode,
GeneratorWrapperFunctionMode,
GetterMode,
SetterMode,
MethodMode,
ArrowFunctionMode,
ProgramMode,
ModuleAnalyzeMode,
ModuleEvaluateMode
};
inline bool isFunctionParseMode(SourceParseMode parseMode)
{
switch (parseMode) {
case SourceParseMode::NormalFunctionMode:
case SourceParseMode::GeneratorBodyMode:
case SourceParseMode::GeneratorWrapperFunctionMode:
case SourceParseMode::GetterMode:
case SourceParseMode::SetterMode:
case SourceParseMode::MethodMode:
case SourceParseMode::ArrowFunctionMode:
return true;
case SourceParseMode::ProgramMode:
case SourceParseMode::ModuleAnalyzeMode:
case SourceParseMode::ModuleEvaluateMode:
return false;
}
RELEASE_ASSERT_NOT_REACHED();
return false;
}
inline bool isModuleParseMode(SourceParseMode parseMode)
{
switch (parseMode) {
case SourceParseMode::ModuleAnalyzeMode:
case SourceParseMode::ModuleEvaluateMode:
return true;
case SourceParseMode::NormalFunctionMode:
case SourceParseMode::GeneratorBodyMode:
case SourceParseMode::GeneratorWrapperFunctionMode:
case SourceParseMode::GetterMode:
case SourceParseMode::SetterMode:
case SourceParseMode::MethodMode:
case SourceParseMode::ArrowFunctionMode:
case SourceParseMode::ProgramMode:
return false;
}
RELEASE_ASSERT_NOT_REACHED();
return false;
}
inline bool isProgramParseMode(SourceParseMode parseMode)
{
switch (parseMode) {
case SourceParseMode::ProgramMode:
return true;
case SourceParseMode::NormalFunctionMode:
case SourceParseMode::GeneratorBodyMode:
case SourceParseMode::GeneratorWrapperFunctionMode:
case SourceParseMode::GetterMode:
case SourceParseMode::SetterMode:
case SourceParseMode::MethodMode:
case SourceParseMode::ArrowFunctionMode:
case SourceParseMode::ModuleAnalyzeMode:
case SourceParseMode::ModuleEvaluateMode:
return false;
}
RELEASE_ASSERT_NOT_REACHED();
return false;
}
inline bool functionNameIsInScope(const Identifier& name, FunctionMode functionMode)
{
if (name.isNull())
return false;
if (functionMode != FunctionExpression)
return false;
return true;
}
inline bool functionNameScopeIsDynamic(bool usesEval, bool isStrictMode)
{
// If non-strict eval is in play, a function gets a separate object in the scope chain for its name.
// This enables eval to declare and then delete a name that shadows the function's name.
if (!usesEval)
return false;
if (isStrictMode)
return false;
return true;
}
typedef uint16_t CodeFeatures;
const CodeFeatures NoFeatures = 0;
const CodeFeatures EvalFeature = 1 << 0;
const CodeFeatures ArgumentsFeature = 1 << 1;
const CodeFeatures WithFeature = 1 << 2;
const CodeFeatures ThisFeature = 1 << 3;
const CodeFeatures StrictModeFeature = 1 << 4;
const CodeFeatures ShadowsArgumentsFeature = 1 << 5;
const CodeFeatures ModifiedParameterFeature = 1 << 6;
const CodeFeatures ModifiedArgumentsFeature = 1 << 7;
const CodeFeatures ArrowFunctionFeature = 1 << 8;
const CodeFeatures ArrowFunctionContextFeature = 1 << 9;
const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ModifiedParameterFeature | ArrowFunctionFeature | ArrowFunctionContextFeature;
} // namespace JSC
#endif // ParserModes_h
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