Modules are designed (in the JavaScript spec) to only have their top-level
code run once. To "re-use" a cached module, the expectation is that other
modules would use imports to access the exports of that module. In
particular, in your code snippet, you'd return the already-evaluated module
from the ResolveCallback passed to the module that wishes to import from it.
If what you want to do is compile some code and run it multiple times, a
v8::Script is probably want you want instead.
On Tue, Feb 12, 2019 at 5:11 PM Jane Chen <jxche...@gmail.com> wrote:
> Embedding v8 6.7.
>
> I found the following test in test-modules.cc:
>
> CHECK(module->Evaluate(env.local())
> .ToLocalChecked()
> ->StrictEquals(v8_str("gaga")));
> CHECK_EQ(Module::kEvaluated, module->GetStatus());
> CHECK(module->Evaluate(env.local()).ToLocalChecked()->IsUndefined());
>
> and it is consistent with what I'm seeing. Basically, evaluating an
> evaluated module returns undefined. I don't get the rational for this
> behavior. Once a module is evaluated, it is no good for evaluation? Then
> how am I supposed to re-use a cached module? Re-instantiating it doesn't
> seem to help.
>
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