#ifndef JSScope_h
#define JSScope_h
#include "GetPutInfo.h"
#include "JSObject.h"
namespace JSC {
class ScopeChainIterator;
class SymbolTable;
class VariableEnvironment;
class WatchpointSet;
class JSScope : public JSNonFinalObject {
public:
typedef JSNonFinalObject Base;
static const unsigned StructureFlags = Base::StructureFlags;
friend class LLIntOffsetsExtractor;
static size_t offsetOfNext();
static JSObject* objectAtScope(JSScope*);
static JSObject* resolve(ExecState*, JSScope*, const Identifier&);
static ResolveOp abstractResolve(ExecState*, size_t depthOffset, JSScope*, const Identifier&, GetOrPut, ResolveType, InitializationMode);
static bool hasConstantScope(ResolveType);
static JSScope* constantScopeForCodeBlock(ResolveType, CodeBlock*);
static void collectVariablesUnderTDZ(JSScope*, VariableEnvironment& result);
static void visitChildren(JSCell*, SlotVisitor&);
bool isVarScope();
bool isLexicalScope();
bool isModuleScope();
bool isCatchScope();
bool isFunctionNameScopeObject();
bool isNestedLexicalScope();
ScopeChainIterator begin();
ScopeChainIterator end();
JSScope* next();
JSGlobalObject* globalObject();
VM* vm();
JSObject* globalThis();
SymbolTable* symbolTable();
protected:
JSScope(VM&, Structure*, JSScope* next);
private:
WriteBarrier<JSScope> m_next;
};
inline JSScope::JSScope(VM& vm, Structure* structure, JSScope* next)
: Base(vm, structure)
, m_next(vm, this, next, WriteBarrier<JSScope>::MayBeNull)
{
}
class ScopeChainIterator {
public:
ScopeChainIterator(JSScope* node)
: m_node(node)
{
}
JSObject* get() const { return JSScope::objectAtScope(m_node); }
JSObject* operator->() const { return JSScope::objectAtScope(m_node); }
JSScope* scope() const { return m_node; }
ScopeChainIterator& operator++() { m_node = m_node->next(); return *this; }
bool operator==(const ScopeChainIterator& other) const { return m_node == other.m_node; }
bool operator!=(const ScopeChainIterator& other) const { return m_node != other.m_node; }
private:
JSScope* m_node;
};
inline ScopeChainIterator JSScope::begin()
{
return ScopeChainIterator(this);
}
inline ScopeChainIterator JSScope::end()
{
return ScopeChainIterator(0);
}
inline JSScope* JSScope::next()
{
return m_next.get();
}
inline JSGlobalObject* JSScope::globalObject()
{
return structure()->globalObject();
}
inline VM* JSScope::vm()
{
return MarkedBlock::blockFor(this)->vm();
}
inline Register& Register::operator=(JSScope* scope)
{
*this = JSValue(scope);
return *this;
}
inline JSScope* Register::scope() const
{
return jsCast<JSScope*>(jsValue());
}
inline JSGlobalObject* ExecState::lexicalGlobalObject() const
{
return callee()->globalObject();
}
inline size_t JSScope::offsetOfNext()
{
return OBJECT_OFFSETOF(JSScope, m_next);
}
}
#endif // JSScope_h