why does CPython require to wrap the free variables if
closure functions by a cell objects?
why can't it just pass the object itself?
>>> def f(x):
... def g():
... return x+2
... return g
...
>>> g5 = f(5)
>>> dis(g5)
3 0 LOAD_DEREF 0 (x)
3 LOAD_CONST 1 (2)
6 BINARY_ADD
7 RETURN_VALUE
>>> dis(f)
2 0 LOAD_CLOSURE 0 (x)
3 BUILD_TUPLE 1
6 LOAD_CONST 1 (<code objec...
9 MAKE_CLOSURE 0
12 STORE_FAST 1 (g)
4 15 LOAD_FAST 1 (g)
18 RETURN_VALUE
>>>
i don't see why dereferencing is needed. why not just pass
the object itself to the MAKE_CLOSURE? i.e.
LOAD_FAST 0 (x)
LOAD_CONST 1 (the code object)
MAKE_CLOSURE 0
what problem does the cell object solve?
-tomer
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