JSObject* JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSScope* scope = it.scope();
JSObject* object = it.get();
if (++it == end) // Global scope.
return object;
if (object->hasProperty(exec, ident)) {
if (!isUnscopable(exec, scope, object, ident))
return object;
ASSERT_WITH_MESSAGE(!exec->hadException(), "When an exception occurs, the result of isUnscopable becomes false");
}
}
}
JSObject* JSScope::resolve(ExecState* exec, JSScope* scope, const Identifier& ident)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
ScopeChainIterator end = scope->end();
ScopeChainIterator it = scope->begin();
while (1) {
JSScope* scope = it.scope();
JSObject* object = it.get();
// Global scope.
if (++it == end) {
JSScope* globalScopeExtension = scope->globalObject(vm)->globalScopeExtension();
if (UNLIKELY(globalScopeExtension)) {
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return object;
JSObject* extensionScopeObject = JSScope::objectAtScope(globalScopeExtension);
hasProperty = extensionScopeObject->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty)
return extensionScopeObject;
}
return object;
}
bool hasProperty = object->hasProperty(exec, ident);
RETURN_IF_EXCEPTION(throwScope, nullptr);
if (hasProperty) {
bool unscopable = isUnscopable(exec, scope, object, ident);
ASSERT(!throwScope.exception() || !unscopable);
if (!unscopable)
return object;
}
}
}
