Delegated properties should be read-only

[mvicsokolova]

Currently, to expose the value of an atomic property to the public, one can declare a delegated property like this:

private val _a = atomic(0)
public var a: Int by _a

⚠️It's allowed to declare a delegated var, though it may e.g. be misused for an incorrect increment:

a++ // This is not an atomic increment !

Suggestion

To prevent erroneous usages, I suggest allowing only read-only delegated properties:

private val _a = atomic(0)
public val a: Int by _a // This property should be read-only

Additionally, delegation to atomic factory should be deprecated too, in favor for declaration of @volatile property