Labels as values and threaded-code interpretation

[Alex Rønne Petersen]

On 02-06-2013 06:49, Walter Bright wrote:
> On 6/1/2013 7:35 PM, Alex Rønne Petersen wrote:
>> On 01-06-2013 09:59, bearophile wrote:
>>> "Recently" the Python C interpreter was modified and speed up thanks to
>>> this non-standard feature. CPython source code has two versions, one
>>> with computed gotos and one without, to compile it even if your C
>>> compiler doesn't support them or their GNU-C syntax.
>>
>> I don't think there's any question as to the usefulness (and
>> essentialness) of
>> this feature. I'm very close to just writing most of the interpreter
>> in C over a
>> triviality like this.
>
> To be pedantic, C and C++ don't have that feature. Some compilers add it
> as an extension.

I know, I just don't always remember to type out "GNU C" instead of "C".

>
> Also, such a construct could not be made @safe. The trouble is you could
> pass those addresses anywhere, and goto them from anywhere.

I don't particularly care about its safety (its insanely unsafe). It's 
all about performance with a feature like this.

-- 
Alex Rønne Petersen
alex at alexrp.com / alex at lycus.org
http://alexrp.com / http://lycus.org