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function makeMembrane(){ | |
var revokableWrappingHandler = Proxy.revocable({}, { | |
get: function(target, name){ | |
return (...args) => wrap(Reflect[name](...args)); | |
} | |
}); | |
var revoke = revokableWrappingHandler.revoke; | |
var wrappingHandler = revokableWrappingHandler.proxy; | |
var un2wrapped = new WeakMap(); | |
var wrap = function wrap(x){ | |
if(Object(x) !== x) | |
return x; | |
var wrapped = un2wrapped.get(x); | |
if(wrapped) | |
return wrapped; | |
wrapped = new Proxy(x, wrappingHandler); | |
un2wrapped.set(x, wrapped); | |
return wrapped; | |
}; | |
return { | |
revoke: revoke, | |
wrap: wrap | |
}; | |
}; |
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