Issue with keyword arguments #20

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pca006132 · 2021-07-06T11:09:16+08:00

pca006132 commented

2021-07-06 11:09:16 +08:00

Consider the following simple demo:

>>> def foo(x, y):
...     print((x, y))
... 
>>> def bar(y, x):
...     print((x, y))
... 
>>> a = foo
>>> a(1, 2)
(1, 2)
>>> a(x=1, y=2)
(1, 2)
>>> a = bar
>>> a(1, 2)
(2, 1)
>>> a(x=1, y=2)
(1, 2)

Keyword arguments is a bit problematic... Maybe restrict to global functions and non-virtual object methods?

Consider the following simple demo: ``` >>> def foo(x, y): ... print((x, y)) ... >>> def bar(y, x): ... print((x, y)) ... >>> a = foo >>> a(1, 2) (1, 2) >>> a(x=1, y=2) (1, 2) >>> a = bar >>> a(1, 2) (2, 1) >>> a(x=1, y=2) (1, 2) ``` Keyword arguments is a bit problematic... Maybe restrict to global functions and non-virtual object methods?

sb10q commented

2021-07-07 06:53:21 +08:00

What is the problem here exactly?

pca006132 commented

2021-07-07 09:34:36 +08:00

Keyword argument may require runtime resolution if we don't know the function statically, which is the case for function pointers and virtual object methods.

dpn commented

2021-07-09 01:39:14 +08:00

My immediate reaction here is that argument names would need to be part of the function pointer type (which would be a subtype of the same un-named signature).

👍 1

sb10q commented

2021-07-09 17:27:12 +08:00

Yes, we are going to do that.

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Reference: M-Labs/nac3-spec#20