There's one thing I'm struggling with here. Given the simple class
definition below, using the V8 C++ API I can call the ordinary function
"lamingtonsIsUndefined", but how would I call the accessor "get
numberOfLamingtons()"?
Many thanks in advance,
Ben
export class DemonstrationClass {
constructor(lamingtons) {
this.lamingtons = lamingtons
}
get numberOfLamingtons() {
return this.lamingtons
}
lamingtonsIsUndefined(){
return this.lamingtons === undefined
}
}
On Sunday, 22 November 2020 at 22:14:55 UTC+10:30 Ben Ernst wrote:
> Thanks for the advice, that got me back on track. The failure mentioned in
> my original post only occurs when there's nothing at all exported from the
> module. I speculate the namespace object gets garbage collected in that
> situation. When I tested with actual valid modules, everything works fine.
> Thanks again,
> Ben
>
>
> On Tuesday, 17 November 2020 at 21:21:25 UTC+10:30 Ben Ernst wrote:
>
>> Thank you for the advice Camillo, the test you referred me to is very
>> helpful. I will prepare a good code sample and come back to this
>> conversation.
>>
>> Regards,
>> Ben
>>
>>
>> On Tue, 17 Nov 2020 at 19:54, Camillo Bruni <cbr...@chromium.org> wrote:
>>
>>> Hi,
>>>
>>> The ModuleNamespace
>>> <https://source.chromium.org/chromium/chromium/src/+/master:v8/include/v8.h;drc=5d658083d506ff1bf14abdd2221d94cbcf4fae96;bpv=1;bpt=1;l=1591?q=v8::Module>
>>>
>>> object is the proper choice, you can have a look at the existing tests
>>> <https://source.chromium.org/chromium/chromium/src/+/master:v8/test/cctest/test-api.cc;l=26235;drc=5d658083d506ff1bf14abdd2221d94cbcf4fae96;bpv=1;bpt=1?q=v8::Module>
>>> .
>>> For future reference, you will usually find (a bit hidden and obscure, I
>>> agree) existing tests in V8's test-api.cc
>>> <https://source.chromium.org/chromium/chromium/src/+/master:v8/test/cctest/test-api.cc>
>>> .
>>>
>>> Could you provide some more example code for the error you get
>>> with persistent handles?
>>>
>>> cheers,
>>> Camillo
>>>
>>> On Tue, 17 Nov 2020 at 01:11, Ben Ernst <boi...@gmail.com> wrote:
>>>
>>>> I am migrating my V8 code from using "plain scripts" to using "ES6
>>>> Modules". There are a few concepts that I am struggling with.
>>>>
>>>> First, how might I retrieve a class definition defined in a module?
>>>> Previously I would have used the "global" object on the "context" (i.e.
>>>> context->Global()), and found the class definition there. I can't find a
>>>> good example on how to do that in a module. I am experimenting with
>>>> Module::GetModuleNamespace(), but I'm not sure that I'm on the right track.
>>>>
>>>> Second, am I allowed to take a persistent handle to a module? I am
>>>> finding that after restoring a module from a persistent handle, I
>>>> encounter
>>>> the failure below.
>>>>
>>>> #
>>>> # Fatal error in C:\621300de\v8\src/api/api-inl.h, line 128
>>>> # Debug check failed: allow_empty_handle || that != nullptr.
>>>> #
>>>> #
>>>> #
>>>> #FailureMessage Object: 0000006114FBC2E0
>>>> ==== C stack trace ===============================
>>>>
>>>> v8::base::debug::StackTrace::StackTrace
>>>> [0x0,000,7FF,60D,F82,80B+27]
>>>> v8::platform::DefaultPlatform::PostJob
>>>> [0x0,000,7FF,60D,F7F,1E1+401]
>>>> V8_Fatal [0x0,000,7FF,60C,251,B87+167]
>>>> v8::base::PrintCheckOperand<unsigned __int64>
>>>> [0x0,000,7FF,60C,251,683+627]
>>>> v8::Module::GetStatus [0x0,000,7FF,60C,1E0,3FD+141]
>>>> v8::Module::GetModuleNamespace [0x0,000,7FF,60C,1D1,243+19]
>>>>
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>>>>
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