when I dont' use the result of the builtin `copy()` function of data classes Intellij highlights the...

# announcements

[Karlo Lozovina]

when I dont' use the result of the builtin copy() function of data classes Intellij highlights the code as a warning (with error of "Unused result of data class copy").

is there a way to get warning activated for my own functions, when I don't use the result value?

[nanodeath]

https://youtrack.jetbrains.com/issue/KT-12719

[Ian Lake]

Although note that there are Android only (https://developer.android.com/reference/kotlin/androidx/annotation/CheckResult) and Compose (https://developer.android.com/reference/kotlin/androidx/compose/runtime/CheckResult) versions of that annotation already if you're working on those specific platforms/feature sets

[Karlo Lozovina]

thanks for the info, will be watching the issue...

[Rob Elliot]

How about a pure keyword (or @Pure if it has to be an annotation)? Less verbose, and by definition there’s no point calling a pure function unless you use the result.

[Nir]

yeah, the converse isn't true though

[Nir]

you may want to enforce users to look at the result even if it's not pure