[Pythonmac-SIG] NSTableView and NSOutlineView backgrounds
oussoren at cistron.nl
Wed Oct 15 10:02:10 EDT 2003
On 15 okt 2003, at 15:40, Bob Ippolito wrote:
> On Wednesday, Oct 15, 2003, at 09:21 America/New_York, Bob Ippolito
>> On Wednesday, Oct 15, 2003, at 09:06 America/New_York, Jack Jansen
>>> On Wednesday, October 15, 2003, at 12:35 PM, Ronald Oussoren wrote:
>>>>> I've been thinking about it. And the nice thing is that "[" cannot
>>>>> occur as the start symbol for an expression, and I think a NAME
>>>>> after an
>>>>> expression is also safe, so adding rules like
>>>>> atom: '[' test methodarg* ']'
>>>>> methodarg: NAME ':' test
>>>>> should work...
>>>> I'm probably very dense, but isn't '[' the start of a list literal
>>>> or list comprehension and therefore a valid start of an expression
>>>> or statement?.
>>> No, it is *me* who is dense. Jack: open mouth, insert foot:-)
>> Surely it would be theoretically parsable with no class between list
>> literals or comprehensions.. you wouldn't have commas, or if you did,
>> they would be after a colon.. and you wouldn't have the keywords
>> "for" or "in". It probably wouldn't fit very well into the Python
>> parser though.
> no clash between list literals, I mean.
> Also every message would be an invalid list or list comprehension
> because of the space between the receiver and the first component of
> the selector.
There's also the useability of this options, code like the example
below "feel" like lists in Python.
foo = [app beginSheet: mySheet
contextInfo: None ]
Actually, this feels more like a dict than a list. It definitly does
not shout 'methodcall' at
BTW. Another option for segemented method names would be:
foo = app( 'beginSheet:', mySheet,
This requires not changes to the language, is implementable today and
is ugly. A possible implemenation would the methohd below to ObjC
classes and instances:
def __call__(self, *args):
# Python 2.3 only, no error-checking and no varargs methods
keys = args[::2]
actualArgs = args[1::2]
mname = (''.join(keys)).replace(':', '_')
return getattr(self, mname)(*actualArgS)
The obvious change to app(beginSheet=mySheet, ...) would need changes
to the language to preserve the order of arguments.
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