[swift-users] Member wise initializer doesn't work with default-initialized const properties
neil at faiman.org
Tue May 17 09:48:19 CDT 2016
> On May 17, 2016, at 7:03 AM, Jeremy Pereira <jeremy.j.pereira at googlemail.com> wrote:
>> On 16 May 2016, at 22:37, Neil Faiman via swift-users <swift-users at swift.org> wrote:
>> Using the default Swift with Xcode 7.3.1.
>> It appears that you cannot use the implicit memberwise initializer with a struct that has “let” properties with default values.
> It’s not a default value, it is *the* value
>> I don’t believe that the Apple _The Swift Programming Language_ mentions this restriction.
> Chapter “The Basics”, section “Constants and Variables”
> “The value of a constant cannot be changed once it is set”.
“You can provide a default value for a stored property as part of its definition, as described in Default Property Values. You can also set and modify the initial value for a stored property during initialization. This is true even for constant stored properties, as described in Assigning Constant Properties During Initialization.” (Classes and Structures / Stored Properties)
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