bartc <b...@freeuk.com>:
> On 22/09/2017 10:23, Marko Rauhamaa wrote:
>> However, Python doesn't need any language changes to implement memory
>> slots. A memory slot could be defined as any object that implements
>> "get()" and "set(value)" methods:
>
> I didn't understand your examples.
>
> Can Python be used to write, say, a swap() function that works with any
> argument types (not just classes or lists)? Example:
>
> def swap(&a,&b): # made up syntax
> a, b = b, a
>
> x=10
> y="Z"
> swap(x,y)
> print (x,y) # "Z" and "10"
Yes, following my recipe:
def swap(ref_a, ref_b):
a, b = ref_a.get(), ref_b.get()
ref_a.set(b)
ref_b.set(a)
x = 10
y = "Z"
swap(slot_ref(locals(), "x"), slot_ref(locals(), "y"))
print(x, y) # "Z" and 10
Marko
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