[Idea] Make lazy an attribute

Anton_Zhilin · May 2, 2016, 8:39pm

One of proposals that will probably be submitted for Swift 4, will be
Property Behaviors propoal.

It aims to generalize @IBOutlet, @synchronized, @delayedinit, and of
course, @lazy.
(Side note: it would be great if it also included unowned)

Because we aim for less breaking changes in Swift 4, we should prepare
ground for it.
The suggestion is to rename `lazy` to `@lazy`.

Besides the aforementioned reason, I think, lazy really has its place among
attributes.
It does not change type of property, it just helps to delay side effects of
initialization.

- Anton

David_Sweeris · May 2, 2016, 9:25pm

Yeah, I was just thinking that we should get the “call-site” syntax settled for property behaviors, for exactly that reason.

···

On May 2, 2016, at 3:39 PM, Антон Жилин via swift-evolution <swift-evolution@swift.org> wrote:

One of proposals that will probably be submitted for Swift 4, will be Property Behaviors propoal.

It aims to generalize @IBOutlet, @synchronized, @delayedinit, and of course, @lazy.
(Side note: it would be great if it also included unowned)

Because we aim for less breaking changes in Swift 4, we should prepare ground for it.
The suggestion is to rename `lazy` to `@lazy`.

Besides the aforementioned reason, I think, lazy really has its place among attributes.
It does not change type of property, it just helps to delay side effects of initialization.

- Anton
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swift-evolution mailing list
swift-evolution@swift.org
https://lists.swift.org/mailman/listinfo/swift-evolution

Anton_Zhilin · May 5, 2016, 3:38pm

I'm ready to submit a pull request:

github.com

Anton3/swift-evolution/blob/lazy-attribute/proposals/NNNN-lazy-attribute.md

# Rename `lazy` to `@lazy`

* Proposal: [SE-NNNN](https://github.com/apple/swift-evolution/blob/master/proposals/NNNN-name.md)
* Author: [Anton3](https://github.com/Anton3)
* Status: **[Awaiting review](#rationale)**
* Review manager: TBD

## Introduction

Make `lazy` declaration modifier an attribute by renaming it to `@lazy`. Example:

```swift
struct ResourceManager {
  @lazy var resource: NSData = loadResource()
}
```

Swift-evolution thread: [link to the discussion thread for that proposal](https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160502/016325.html)

## Motivation

This file has been truncated. show original

- Anton

···

2016-05-03 0:25 GMT+03:00 David Sweeris <davesweeris@mac.com>:

Yeah, I was just thinking that we should get the “call-site” syntax
settled for property behaviors, for exactly that reason.

> On May 2, 2016, at 3:39 PM, Антон Жилин via swift-evolution < > swift-evolution@swift.org> wrote:
>
> One of proposals that will probably be submitted for Swift 4, will be
Property Behaviors propoal.
>
> It aims to generalize @IBOutlet, @synchronized, @delayedinit, and of
course, @lazy.
> (Side note: it would be great if it also included unowned)
>
> Because we aim for less breaking changes in Swift 4, we should prepare
ground for it.
> The suggestion is to rename `lazy` to `@lazy`.
>
> Besides the aforementioned reason, I think, lazy really has its place
among attributes.
> It does not change type of property, it just helps to delay side effects
of initialization.
>
> - Anton
> _______________________________________________
> swift-evolution mailing list
> swift-evolution@swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution