#ifndef GetByIdStatus_h
#define GetByIdStatus_h
#include "PropertyOffset.h"
#include "StructureSet.h"
#include <wtf/NotFound.h>
namespace JSC {
class CodeBlock;
class Identifier;
class GetByIdStatus {
public:
enum State {
NoInformation, Simple, TakesSlowPath, MakesCalls };
GetByIdStatus()
: m_state(NoInformation)
, m_offset(invalidOffset)
{
}
explicit GetByIdStatus(State state)
: m_state(state)
, m_offset(invalidOffset)
{
ASSERT(state == NoInformation || state == TakesSlowPath || state == MakesCalls);
}
GetByIdStatus(
State state, bool wasSeenInJIT, const StructureSet& structureSet = StructureSet(),
PropertyOffset offset = invalidOffset, JSValue specificValue = JSValue(), Vector<Structure*> chain = Vector<Structure*>())
: m_state(state)
, m_structureSet(structureSet)
, m_chain(chain)
, m_specificValue(specificValue)
, m_offset(offset)
, m_wasSeenInJIT(wasSeenInJIT)
{
ASSERT((state == Simple) == (offset != invalidOffset));
}
static GetByIdStatus computeFor(CodeBlock*, unsigned bytecodeIndex, Identifier&);
static GetByIdStatus computeFor(VM&, Structure*, Identifier&);
State state() const { return m_state; }
bool isSet() const { return m_state != NoInformation; }
bool operator!() const { return !isSet(); }
bool isSimple() const { return m_state == Simple; }
bool takesSlowPath() const { return m_state == TakesSlowPath || m_state == MakesCalls; }
bool makesCalls() const { return m_state == MakesCalls; }
const StructureSet& structureSet() const { return m_structureSet; }
const Vector<Structure*>& chain() const { return m_chain; } JSValue specificValue() const { return m_specificValue; } PropertyOffset offset() const { return m_offset; }
bool wasSeenInJIT() const { return m_wasSeenInJIT; }
private:
static void computeForChain(GetByIdStatus& result, CodeBlock*, Identifier&, Structure*);
static GetByIdStatus computeFromLLInt(CodeBlock*, unsigned bytecodeIndex, Identifier&);
State m_state;
StructureSet m_structureSet;
Vector<Structure*> m_chain;
JSValue m_specificValue;
PropertyOffset m_offset;
bool m_wasSeenInJIT;
};
}
#endif // PropertyAccessStatus_h