Fileprivate vs private

Milos_Jakovljevic · February 12, 2017, 5:19pm

Hi everyone,

Can anyone elaborate whats the idea behind private and fileprivate ? Or better yet what is the purpose of fileprivate ?

Thanks,
Milos

···

Sent from my iPad

Chris_Lattner · February 12, 2017, 5:25pm

See SE-0025 and the discussion links at the top of the proposal:

github.com

apple/swift-evolution/blob/main/proposals/0025-scoped-access-level.md

# Scoped Access Level

* Proposal: [SE-0025](0025-scoped-access-level.md)
* Author: Ilya Belenkiy
* Status: **Implemented (Swift 3)**
* Review Manager: [Doug Gregor](http://github.com/DougGregor)
* Decision Notes: [Rationale](https://forums.swift.org/t/se-0025-scoped-access-level-next-steps/1797/131)
* Bug: [SR-1275](https://bugs.swift.org/browse/SR-1275)
* Previous revision: [1](https://github.com/apple/swift-evolution/blob/e4328889a9643100177aef19f6f428855c5d0cf2/proposals/0025-scoped-access-level.md)

## Introduction

Scoped access level allows hiding implementation details of a class or a class extension at the class/extension level, instead of a file. It is a concise expression of the intent that a particular part of a class or extension definition is there only to implement a public API for other classes or extensions and must not be used directly anywhere outside of the scope of the class or the extension.

[Swift Evolution Discussion](https://forums.swift.org/t/review-se-0025-scoped-access-level/1588), [Next Steps Discussion](https://forums.swift.org/t/se-0025-scoped-access-level-next-steps/1797)

## Motivation

Currently, the only reliable way to hide implementation details of a class is to put the code in a separate file and mark it as private. This is not ideal for the following reasons:

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-Chris

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On Feb 12, 2017, at 9:19 AM, Milos Jakovljevic via swift-evolution <swift-evolution@swift.org> wrote:

Hi everyone,

Can anyone elaborate whats the idea behind private and fileprivate ? Or better yet what is the purpose of fileprivate ?