Apologies as I am still not fully versed with Persistent<T,M>. I am trying
to make an unordered_map of values to values (kind of like js's Map (but I
can't use that)).
So ideally something like: unordered_map<Peristent<v8::Value>,
Persistent<v8::Value> >. The source however specifically refers to
UniquePersistent (now Global)
for this:
* C++11 embedders can use STL containers with UniquePersistent values,
* but pre-C++11 does not support the required move semantic and hence
* may want these container classes.
So I guess my first questions is what map<UniquePersistent, UniquePersistent>
gets me instead of map<Persistent, Persistent>. Separately,
I went ahead and started implementing this (required me to write hasher and
equal for unordered_map), and get this error:
struct v8_value_hash
{
size_t operator()(const UniquePersistent<v8::Value> & aPersistentKey) { ...
}
}
struct v8_value_equal_to
{
bool operator()(const UniquePersistent<v8::Value> & lhsPersistentKey, const
UniquePersistent<v8::Value> & rhsPersistentKey) const { ... }
}
And I get:
error:
the parameter for this explicitly-defaulted copy constructor is const,
but a member or base requires it to be non-const
pair(const pair& __p) = default;
^
Thanks!
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