On Tue, May 25, 2021 at 8:11 AM Chris Angelico <rosuav@gmail.com> wrote:
On Tue, May 25, 2021 at 5:29 PM Steven D'Aprano <steve@pearwood.info> wrote:
Here's a counter-proposal: we have a special symbol which is transformed at compile-time to the left hand assignment target as a string. Let's say we make that special expression `@@` or the googly-eyes symbol.
...
Questions:
1) Is this restricted to the "=" assignment operator, or will other operators trigger this too? x += f(@@) # ? if x := f(@@): # ?
2) What about other forms of assignment? for spam in foo(@@): # ? with open(@@ + ".json") as config: # ? from sys import @@ as argv # okay that's just stupid
3) Is this a string literal, or a magic token that happens to evaluate as a string? x = @@ ".json" # Legal if @@ is a string literal
No wrong answers. (Well, unless you say "tomato". That is a very wrong answer to a yes/no question.)
I'm liking this. It might mean that class syntax and decorator abuse become less necessary as ways to get around name duplication.
ChrisA
Another one to add to the list: does it work with lambdas on the RHS? Does it matter how nested? x = lambda: @@ y = lambda: lambda: lambda: @@ --- Ricky. "I've never met a Kentucky man who wasn't either thinking about going home or actually going home." - Happy Chandler