https://kotlinlang.org
Join Slack
I'm trying to write some code using `termios` in K/N. `termios` is a struct which has a bitflag fie...
# kotlin-native
d
I'm trying to write some code using 
termios
in K/N. 
termios
is a struct which has a bitflag field called 
c_lflag
; its type is 
platform.posix.tcflag_t
which appears to be an int on mac and a uint on linux. I'm trying to do some bit logic like this: 
newTermios.c_lflag.and((_ECHO_.or(_ICANON_.or(_IEXTEN_))).inv())
(equivalent to 
c_lflag & ~(ECHO | ICNON | IEXTEN)
in C). In order to support both targets, I thought 
ECHO.or(...) as tcflag_t
would work, but I'm getting a warning that the cast will never succeed. What's the right solution here?
(I'm pretty sure I could use expect / actual for this case, but that seems like overkill)
It seems to me like I need to call 
.toUInt()
on Linux and not on Mac
e
use 
.convert()
d
Ah, let me try. Thanks!
Looks good so far, thank you, and sorry for the beginner question. (I was originally searching for a function like 
cast
)
e
no worries. there's clearly room for improvement in the docs https://kotlinlang.org/api/latest/jvm/stdlib/kotlinx.cinterop/convert.html
l
Kotlin doesn't do the modifying casts you see with primitives in other languages (same issue casting int to double). You need the conversion methods, like toDouble. Convert is similar, but it checks the plaform type to convert to.
e
not to confuse things too much, but
Copy code
(fun (x: Double) { println(x) } as (Number) -> Unit).invoke(1 as Int)
works 😛
(that is a bug in Kotlin/JVM though)
Open in Slack
PreviousNext
Powered by

kotlinlang

A modern programming language that makes developers happier.

Powered by