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December 24, 2022 16:28
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Save LouisCAD/04be811e22d45cbc7285ab247c6c12e7 to your computer and use it in GitHub Desktop.
Allows simple bit flags operation on int values in kotlin. Now available in Splitties: https://github.com/LouisCAD/Splitties/tree/master/modules/bitflags Inspired by: http://stackoverflow.com/a/40588216/4433326
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| @file:Suppress("NOTHING_TO_INLINE") | |
| import kotlin.experimental.and // Used for Byte | |
| import kotlin.experimental.inv // Used for Byte | |
| import kotlin.experimental.or // Used for Byte | |
| inline fun Int.hasFlag(flag: Int) = flag and this == flag | |
| inline fun Int.withFlag(flag: Int) = this or flag | |
| inline fun Int.minusFlag(flag: Int) = this and flag.inv() | |
| inline fun Byte.hasFlag(flag: Byte) = flag and this == flag | |
| inline fun Byte.withFlag(flag: Byte) = this or flag | |
| inline fun Byte.minusFlag(flag: Byte) = this and flag.inv() |
Actually, what you suggest is wrong @clslrns, just check it with a few actual bit flags and you'll see that the implementation in this gist is correct. BTW, this moved to a library: https://github.com/LouisCAD/Splitties/tree/master/modules/bitflags
Oh, sorry, I had an error during tests. Thanks for link and code!
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This is wrong, use
flag or this == flaginstead.