[Python-ideas] Immemorial desire for "do-while"-like construction

[Carl Johnson]

On Wed, Jul 15, 2009 at 2:16 PM, Jan Kaliszewski<zuo at chopin.edu.pl> wrote:
> 16-07-2009 o 00:54 Chris Rebert <pyideas at rebertia.com> wrote:
>
>> You can fix that by just writing it as:
>>
>> while True:
>>    SOME
>>    ACTIONS
>>    HERE
>>    if not CONDITION: break
>
> Yeah, but it's not the same :) because eyes must look for the actual loop
> condition somewhere-within-the-loop (after all, "while True" is common
> idiom with large field of usage, not only in such situations...).

I think we can just piggyback off of Python's existing optional
support for braces, BEGIN, END, etc.:

while True: #DO WHILE COND {
    something
# }
    if cond: break

:-D

My favorite proposal out of the last discussion of do-while was to
make "while:" mean "while True:". Combined with Python's optional
support for braces, it sounds like a winner to me! :-D

Optionally-yrs,

-- Carl Johnson