InstancePre can impl Clone#3510
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Its a manually written impl, not a derive, because InstancePre<T>: Clone does not require T: Clone. The clone should be reasonably inexpensive: Clone for Module is just an Arc, and Clone for Definition should also just be an Arc on the HostFunc or Instance variants. An InstancePre shouldnt contain any Definition::Extern variants because there is not yet a Store associated with it- right?
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alexcrichton
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Its a manually written impl, not a derive, because
InstancePre<T>: Cloneis not bound by
T: Clone.The clone should be reasonably inexpensive: Clone for
Moduleis just anArc, and Clone for
Definitionshould also just be an Arc on theHostFuncor
Instancevariants. AnInstancePreshouldnt contain anyDefinition::Externvariants because there is not yet aStoreassociatedwith it- right?