On 2022-04-02 22:28, Steven D'Aprano wrote:
On Sun, Apr 03, 2022 at 01:09:00PM +0900, Stephen J. Turnbull wrote:
>There was a proposal to provide literal syntax for physical units like
>meters, kilograms, and seconds, along the the SI magnitude prefixes.
>I think that got to the "proto-PEP" stage, but it got a lot of weak
>opposition for a number of reasons, mostly "Python isn't intended for
>creating DSLs
Python is excellent for creating DSLs. It is one of the things it is
well known for.
https://www.startpage.com/sp/search?query=writing+dsls+in+python
I'm not the person you're replying to, but a lot of those search
results are pretty clearly not what was meant here. Python is fine for
creating "real" DSLs, where the L is actually a separate language and
Python is just parsing/interpreting it. What Python isn't so good at is
creating quasi-DSLs or "DSDs" (domain specific dialects), where Python
itself is the language and the domain-specific part is grafted on by use
of objects, operator overloading, etc., so that what you run is actually
a Python program that just looks and behaves a bit different from what
you might expect from "vanilla" Python. This is the "Python isn't for
DSLs" argument that I've seen mentioned on this list and elsewhere
(although I agree that it's a pretty loose use of "DSL").
--
Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no
path, and leave a trail."
--author unknown
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