faint palm
I need a counterpart of C++'s (size_t)(-1). The best I could come up with so far is
@as(usize, @bitCast(@as(isize, -1)))
Is there a more concise way?
NB. Please don't suggest ideas like inverting all bits of a zero, I need a generic way to specify various negative values.
thorn cloak
make a function for it?
dim verge
-x is represented as ~@(uN, x) + 1
thorn cloak
`-x` is represented as `~@(uN, x) + 1`
Hard to guess what that does without a comment
dim verge
it's the relationship that defines twos complement
thorn cloak
would this work?
@as(usize, 0) -% 1
it should
faint palm
would this work?
```rs
@as(usize, 0) -% 1
```
Yeah, I had this idea, still don't find it too readable.
faint palm
make a function for it?
So far seems the best option 😄
dim verge
0 -% x is definitely as readable as you're going to get it
thorn cloak
yeah I find it readable, but functions are good too
faint palm
My issue with readability of the subtraction approach is that it doesn't directly express the idea, but rather makes a (relatively obvious, but nevertheless) equivalent representation of it. I want a negative number, but I have to write a subtraction from zero instead. This is not how I personally define readability.
dim verge
yep, no getting away from giving it a type
faint palm
giving it a type is not my issue, the length of the original expression is
thorn cloak
I had no idea this was a thing lol
faint palm
NB. Please don't suggest ideas like inverting all bits of a zero, I need a generic way to specify various negative values.