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/*
* Copyright (C) 2012-2013, 2015-2016 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.
*/
#pragma once
#include "ConstructAbility.h"
#include "ConstructorKind.h"
#include "Identifier.h"
namespace JSC {
enum class JSParserStrictMode { NotStrict, Strict };
enum class JSParserBuiltinMode { NotBuiltin, Builtin };
enum class JSParserScriptMode { Classic, Module };
enum class SuperBinding { Needed, NotNeeded };
enum class CodeGenerationMode : uint8_t {
Debugger = 1 << 0,
TypeProfiler = 1 << 1,
ControlFlowProfiler = 1 << 2,
};
enum class FunctionMode { FunctionExpression, FunctionDeclaration, MethodDefinition };
// Keep it less than 32, it means this should be within 5 bits.
enum class SourceParseMode : uint8_t {
NormalFunctionMode = 0,
GeneratorBodyMode = 1,
GeneratorWrapperFunctionMode = 2,
GetterMode = 3,
SetterMode = 4,
MethodMode = 5,
ArrowFunctionMode = 6,
AsyncFunctionBodyMode = 7,
AsyncArrowFunctionBodyMode = 8,
AsyncFunctionMode = 9,
AsyncMethodMode = 10,
AsyncArrowFunctionMode = 11,
ProgramMode = 12,
ModuleAnalyzeMode = 13,
ModuleEvaluateMode = 14,
AsyncGeneratorBodyMode = 15,
AsyncGeneratorWrapperFunctionMode = 16,
AsyncGeneratorWrapperMethodMode = 17,
GeneratorWrapperMethodMode = 18,
InstanceFieldInitializerMode = 19,
};
class SourceParseModeSet {
public:
template<typename... Modes>
constexpr SourceParseModeSet(Modes... args)
: m_mask(mergeSourceParseModes(args...))
{
}
ALWAYS_INLINE constexpr bool contains(SourceParseMode mode)
{
return (1U << static_cast<unsigned>(mode)) & m_mask;
}
private:
ALWAYS_INLINE static constexpr unsigned mergeSourceParseModes(SourceParseMode mode)
{
return (1U << static_cast<unsigned>(mode));
}
template<typename... Rest>
ALWAYS_INLINE static constexpr unsigned mergeSourceParseModes(SourceParseMode mode, Rest... rest)
{
return (1U << static_cast<unsigned>(mode)) | mergeSourceParseModes(rest...);
}
const unsigned m_mask;
};
ALWAYS_INLINE bool isFunctionParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::NormalFunctionMode,
SourceParseMode::GeneratorBodyMode,
SourceParseMode::GeneratorWrapperFunctionMode,
SourceParseMode::GeneratorWrapperMethodMode,
SourceParseMode::GetterMode,
SourceParseMode::SetterMode,
SourceParseMode::MethodMode,
SourceParseMode::ArrowFunctionMode,
SourceParseMode::AsyncFunctionBodyMode,
SourceParseMode::AsyncFunctionMode,
SourceParseMode::AsyncMethodMode,
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncArrowFunctionBodyMode,
SourceParseMode::AsyncGeneratorBodyMode,
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode,
SourceParseMode::InstanceFieldInitializerMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncFunctionParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncGeneratorBodyMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode,
SourceParseMode::AsyncFunctionBodyMode,
SourceParseMode::AsyncFunctionMode,
SourceParseMode::AsyncMethodMode,
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncArrowFunctionBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncArrowFunctionParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncArrowFunctionBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncGeneratorParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode,
SourceParseMode::AsyncGeneratorBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncGeneratorWrapperParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncFunctionOrAsyncGeneratorWrapperParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncFunctionMode,
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode,
SourceParseMode::AsyncMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncFunctionWrapperParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncFunctionMode,
SourceParseMode::AsyncMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncFunctionBodyParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::AsyncFunctionBodyMode,
SourceParseMode::AsyncGeneratorBodyMode,
SourceParseMode::AsyncArrowFunctionBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isGeneratorMethodParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncMethodParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(SourceParseMode::AsyncMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isAsyncGeneratorMethodParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(SourceParseMode::AsyncGeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isMethodParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorWrapperMethodMode,
SourceParseMode::GetterMode,
SourceParseMode::SetterMode,
SourceParseMode::MethodMode,
SourceParseMode::AsyncMethodMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isGeneratorOrAsyncFunctionBodyParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorBodyMode,
SourceParseMode::AsyncFunctionBodyMode,
SourceParseMode::AsyncGeneratorBodyMode,
SourceParseMode::AsyncArrowFunctionBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isGeneratorOrAsyncFunctionWrapperParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorWrapperFunctionMode,
SourceParseMode::GeneratorWrapperMethodMode,
SourceParseMode::AsyncFunctionMode,
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncGeneratorWrapperFunctionMode,
SourceParseMode::AsyncMethodMode,
SourceParseMode::AsyncGeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isGeneratorParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorBodyMode,
SourceParseMode::GeneratorWrapperFunctionMode,
SourceParseMode::GeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isGeneratorWrapperParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::GeneratorWrapperFunctionMode,
SourceParseMode::GeneratorWrapperMethodMode).contains(parseMode);
}
ALWAYS_INLINE bool isArrowFunctionParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::ArrowFunctionMode,
SourceParseMode::AsyncArrowFunctionMode,
SourceParseMode::AsyncArrowFunctionBodyMode).contains(parseMode);
}
ALWAYS_INLINE bool isModuleParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::ModuleAnalyzeMode,
SourceParseMode::ModuleEvaluateMode).contains(parseMode);
}
ALWAYS_INLINE bool isProgramParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(SourceParseMode::ProgramMode).contains(parseMode);
}
ALWAYS_INLINE bool isProgramOrModuleParseMode(SourceParseMode parseMode)
{
return SourceParseModeSet(
SourceParseMode::ProgramMode,
SourceParseMode::ModuleAnalyzeMode,
SourceParseMode::ModuleEvaluateMode).contains(parseMode);
}
ALWAYS_INLINE ConstructAbility constructAbilityForParseMode(SourceParseMode parseMode)
{
if (parseMode == SourceParseMode::NormalFunctionMode)
return ConstructAbility::CanConstruct;
return ConstructAbility::CannotConstruct;
}
inline bool functionNameIsInScope(const Identifier& name, FunctionMode functionMode)
{
if (name.isNull())
return false;
if (functionMode != 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 ArrowFunctionFeature = 1 << 6;
const CodeFeatures ArrowFunctionContextFeature = 1 << 7;
const CodeFeatures SuperCallFeature = 1 << 8;
const CodeFeatures SuperPropertyFeature = 1 << 9;
const CodeFeatures NewTargetFeature = 1 << 10;
const CodeFeatures NoEvalCacheFeature = 1 << 11;
const CodeFeatures NonSimpleParameterListFeature = 1 << 12;
const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ArrowFunctionFeature | ArrowFunctionContextFeature | SuperCallFeature | SuperPropertyFeature | NewTargetFeature | NoEvalCacheFeature | NonSimpleParameterListFeature;
typedef uint8_t InnerArrowFunctionCodeFeatures;
const InnerArrowFunctionCodeFeatures NoInnerArrowFunctionFeatures = 0;
const InnerArrowFunctionCodeFeatures EvalInnerArrowFunctionFeature = 1 << 0;
const InnerArrowFunctionCodeFeatures ArgumentsInnerArrowFunctionFeature = 1 << 1;
const InnerArrowFunctionCodeFeatures ThisInnerArrowFunctionFeature = 1 << 2;
const InnerArrowFunctionCodeFeatures SuperCallInnerArrowFunctionFeature = 1 << 3;
const InnerArrowFunctionCodeFeatures SuperPropertyInnerArrowFunctionFeature = 1 << 4;
const InnerArrowFunctionCodeFeatures NewTargetInnerArrowFunctionFeature = 1 << 5;
const InnerArrowFunctionCodeFeatures AllInnerArrowFunctionCodeFeatures = EvalInnerArrowFunctionFeature | ArgumentsInnerArrowFunctionFeature | ThisInnerArrowFunctionFeature | SuperCallInnerArrowFunctionFeature | SuperPropertyInnerArrowFunctionFeature | NewTargetInnerArrowFunctionFeature;
static_assert(AllInnerArrowFunctionCodeFeatures <= 0b111111, "InnerArrowFunctionCodeFeatures must be 6bits");
} // namespace JSC