initializer is inaccessible due to 'private' protection level error when not all struct properties are private

[simanerush]

Description

Consider the following code:

struct Struct {
  var x: Int

  private var y: Int = 0
}
do {
  let _ = Struct(x: 0)
}

Despite x not being private, the "inaccessible initializer" error is emitted.

One fix is to change y to a constant so that it doesn’t contribute to the generated initializer:

struct Struct {
  var x: Int

  private let y: Int = 0
}

However, this is not always a desired behavior.

Solution

Generate an additional, internal memberwise initializer for x, or more fine control over which properties contribute to the generated init.

[aabagdi]

A fix would be much appreciated!

[hassila]

You might want to check out the discussion and references here:

https://forums.swift.org/t/pitch-synthesize-init-of-structs/63688

[mikkpav]

Using this also works:
private(set) var y: Int = 0