On 12-06-14 1:45 PM, Patrick Walton wrote:
On 6/14/12 1:41 PM, Graydon Hoare wrote:
However, we nicely dodged that bullet by not supporting ++ and -- at
all. Very prescient :)
Not really. Reoccurs with foo["bar"] += 1;
Well, there's a fairly straightforward desugaring: foo["bar"] =
foo["bar"] + 1; For ++ it's less certain (you have to dummy up a 1
constant of... some type?)
No, this just kicks the can one step further down the road; it's back to
losing the whole point of the += in-place optimization. Which is what
the user wrote and the library-author wants to provide.
I think .. actually I think we want it to turn into:
foo.lval_index("bar", |x| x += 1);
But as Niko suggests, this really requires a day at a whiteboard to go
through the variations and make sure it all hangs together.
-Graydon
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