Are there any plans to introduce a non-escaping anotation to disable escaping variables of a lambda?

# language-proposals

[hfhbd]

Are there any plans to introduce a non-escaping anotation to disable escaping variables of a lambda?

[jw]

For what purpose?

[jw]

How would it interact with other language features or functions to make some use case better?

[hfhbd]

To disallow escaping a parameter outside of its lambda/context. I found the issue: https://youtrack.jetbrains.com/issue/KT-15514

fun <R> executeQuery(
  sql: String,
  mapper: (SqlCursor) -> R,
  binders: (SqlPreparedStatement.() -> Unit)?
): R

var cursor: SqlCursor? = null
executeQuery("", mapper = { 
  cursor = it // this is a misuse of the API, but it is possible! 
}, null)

[jw]

I remember https://youtrack.jetbrains.com/issue/KT-22507 from a while ago

[Kroppeb]

Could also be useful for stuff like chunked and windowed