Hi, All,
When using Object:: GetRealNamedPropertyInPrototypeChain(), it seems it
can't find already existed named property.
There are two objects involved:
o0 <--Define a named inteceptor for o0
^
| prototype
|
o1
In the inteceptor of o0, I will check whether this property is defined
already.
When running script "o1.valueFromInteceptor; o1.valueFromInteceptor;", I
expect
When first try to
resolve o1.valueFromInteceptor, GetRealNamedPropertyInPrototypeChain()
should return empty
But second try to resolve o1.valueFromInteceptor,
GetRealNamedPropertyInPrototypeChain() should not return empty.
The sample is below:
Expected behavior should be:
property not defined before
property defined before
Now is:
property not defined before
property not defined before
#include <v8.h>
#include <iostream>
using namespace v8;
v8::Handle<v8::Value> Getter(v8::Local<v8::String> propertyName,const
v8::AccessorInfo &info) {
v8::HandleScope handleScope;
v8::Handle<v8::Value> v =
info.This()->GetRealNamedPropertyInPrototypeChain(propertyName);
if (!v.IsEmpty()) {
printf("property defined before\n");
return v8::False();
}
else
{
printf("property not defined before\n");
return v8::True();
}
}
int main()
{
HandleScope handleScope;
Persistent<Context> context = Context::New();
Context::Scope contextScope(context);
Handle<FunctionTemplate> t0 = FunctionTemplate::New();
t0->InstanceTemplate()->SetNamedPropertyHandler(Getter);
Handle<FunctionTemplate> t1 = FunctionTemplate::New();
Local<v8::Object> o0 = t0->GetFunction()->NewInstance();
Local<v8::Object> o1 = t1->GetFunction()->NewInstance();
o1->Set(v8::String::New("__proto__"), o0);
context->Global()->Set(v8::String::New("o0"), o0);
context->Global()->Set(v8::String::New("o1"), o1);
Handle<Script> script =
Script::Compile(v8::String::New("o1.valueFromInteceptor;
o1.valueFromInteceptor;"));
Handle<Value> result = script->Run();
context.Dispose();
return 0;
}
I am not sure whether I miss something or use it in wrong way.
I appreciate if you can correct me.
Cheers~
Xiang
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