#ifndef DFGMinifiedID_h
#define DFGMinifiedID_h
#include "DFGCommon.h"
#include <wtf/HashMap.h>
#include <wtf/PrintStream.h>
namespace JSC { namespace DFG {
class Graph;
class MinifiedNode;
class ValueSource;
struct Node;
class MinifiedID {
public:
MinifiedID() : m_id(invalidID()) { }
MinifiedID(WTF::HashTableDeletedValueType) : m_id(otherInvalidID()) { }
explicit MinifiedID(Node* node) : m_id(bitwise_cast<uintptr_t>(node)) { }
bool operator!() const { return m_id == invalidID(); }
Node* node(const Graph&) const { return bitwise_cast<Node*>(m_id); }
bool operator==(const MinifiedID& other) const { return m_id == other.m_id; }
bool operator!=(const MinifiedID& other) const { return m_id != other.m_id; }
bool operator<(const MinifiedID& other) const { return m_id < other.m_id; }
bool operator>(const MinifiedID& other) const { return m_id > other.m_id; }
bool operator<=(const MinifiedID& other) const { return m_id <= other.m_id; }
bool operator>=(const MinifiedID& other) const { return m_id >= other.m_id; }
unsigned hash() const { return WTF::IntHash<uintptr_t>::hash(m_id); }
void dump(PrintStream& out) const { out.print(RawPointer(reinterpret_cast<void*>(m_id))); }
bool isHashTableDeletedValue() const { return m_id == otherInvalidID(); }
static MinifiedID fromBits(uintptr_t value)
{
MinifiedID result;
result.m_id = value;
return result;
}
uintptr_t bits() const { return m_id; }
private:
friend class MinifiedNode;
static uintptr_t invalidID() { return static_cast<uintptr_t>(static_cast<intptr_t>(-1)); }
static uintptr_t otherInvalidID() { return static_cast<uintptr_t>(static_cast<intptr_t>(-2)); }
uintptr_t m_id;
};
struct MinifiedIDHash {
static unsigned hash(const MinifiedID& key) { return key.hash(); }
static bool equal(const MinifiedID& a, const MinifiedID& b) { return a == b; }
static const bool safeToCompareToEmptyOrDeleted = true;
};
} }
namespace WTF {
template<typename T> struct DefaultHash;
template<> struct DefaultHash<JSC::DFG::MinifiedID> {
typedef JSC::DFG::MinifiedIDHash Hash;
};
template<typename T> struct HashTraits;
template<> struct HashTraits<JSC::DFG::MinifiedID> : SimpleClassHashTraits<JSC::DFG::MinifiedID> {
static const bool emptyValueIsZero = false;
};
}
#endif // DFGMinifiedID_h