I’m really confused, in the Primitives.kt file in ...
# announcementsh
Hamza
11/01/2018, 2:56 AMI’m really confused, in the Primitives.kt file in the kotlin stdlib, the minus function for Bytes is as follows:
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/** Subtracts the other value from this value. */
public operator fun minus(other: Byte): Intg
gildor
11/01/2018, 2:59 AMThis file used for code generation and will be replaced by actual implementation.
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Hamza
11/01/2018, 3:00 AMit gives me an error when I attempt to do
someByte - 10.toByte()g
gildor
11/01/2018, 3:01 AMWhat kind error?
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Hamza
11/01/2018, 3:01 AMexpecting byte, but got integer
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gildor
11/01/2018, 3:02 AMShould work
https://pl.kotl.in/rJbJayd2m
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Hamza
11/01/2018, 3:04 AMbut this does not: https://pl.kotl.in/ryEmTJd2m
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gildor
11/01/2018, 3:04 AMSure, because byte operators return
intgildor
11/01/2018, 3:05 AMSorry, just now got your question
gildor
11/01/2018, 3:08 AMyeah. byte operators produce ints to avoid problems with overflow of byte
gildor
11/01/2018, 3:08 AMsame for Java, C# (and maybe other languages)
gildor
11/01/2018, 3:09 AMgildor
11/01/2018, 3:10 AMJust curious, what is your use case with bytes?
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Hamza
11/01/2018, 3:10 AMjust using instead of ints, to save memory. im working on native with little memory avialable
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gildor
11/01/2018, 3:11 AMsave memory? How?
gildor
11/01/2018, 3:11 AMMost probably you have 32 bit CPU. so those bytes converted to int anyway
gildor
11/01/2018, 3:11 AMyou can save memory with bytes only if have byte array (or value types which don’t available on Kotlin), but not for single byte variable
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Hamza
11/01/2018, 3:13 AMAlright. I'll just use an int
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gildor
11/01/2018, 3:16 AMIf for some reason you still need byte, just convert it explicitly (which means that you know about possible overflow problem)
https://pl.kotl.in/HJUexed37
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Hamza
11/01/2018, 4:37 AMthanks!
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Strum355
11/01/2018, 12:45 PMPremature optimization is the root of all evil
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