Re: [TCLCORE] TIP 301 obsolescence (Was: TIPs I'd like to see done)

[Jeff H. <je...@ac...>]

Donal K. Fellows wrote:
> Alexandre Ferrieux wrote:
>> Jeff Hobbs wrote:
>>> Alexandre Ferrieux wrote:
>>>>      (a)  [close -r|-w $ch] and [chan close -r|-w $ch]
>>>>      (b)  [chan halfclose $ch r|w]
>>>      (b.2)  [chan close $ch ?read|write?]
>> It would be (a.2) then: (b) is distinguished by a different verb (halfclose).
>> May I suggest also
>>
>>         (a.3)  [chan close $ch ?r|w?] (by symmetry with [open])
> 
> Write them out in full, but allow abbreviation. Just because [open] does
> something else doesn't mean that we need to propagate that. Allowing
> abbreviation of literals is quite a common Tcl idiom.
> 
> Which means I support b.2, and note that a.3 would be a way you could
> write it in a script. :-)

In looking at this, I wanted the expanded, but symmetry with open can be 
taken to the literal extreme:

	set fid [open $file rw]
	chan close $fid rw  ; # equiv to having no rw

In this case, I do with perfect symmetry over idiosyncrasies.

Jeff