[swift-evolution] Explicity Size Clipping

[James Campbell]

That last line, the value inside the Degree struct should be a Int created
from a UInt32

On Wed, Jan 6, 2016 at 7:08 PM, James Campbell <james at supmenow.com> wrote:

> This is the full code:
>
> //
>
> //  Box.swift
>
> //  Project
>
> //
>
> //  Created by James Campbell on 06/01/2016.
>
> //
>
> //
>
> // This File implements the Box protocol for Type Safe Alogrithm Types and
> other useful things.
>
>
> import Foundation
>
>
> //MARK:- Box
>
>
> protocol Box: CustomStringConvertible, CustomDebugStringConvertible {
>
>
>
>     typealias FloatLiteralType = Double
>
>     typealias IntegerLiteralType = Int
>
>     typealias BoxType = Any
>
>
>
>     var value: BoxType { get set }
>
>
>
>     init()
>
>     init(_ value: BoxType)
>
> }
>
>
> extension Box where BoxType: CustomStringConvertible {
>
>
>
>     var description: String {
>
>         return self.value.description
>
>     }
>
>
>
>     var debugDescription: String {
>
>         return "\(self.value.description)"
>
>     }
>
> }
>
>
> //MARK: FloatingPointBox
>
>
> protocol FloatingPointBox: Box, FloatLiteralConvertible,
> IntegerLiteralConvertible {
>
>
>
>     typealias BoxType = Double
>
>     typealias FloatLiteralConvertible = Double
>
>     typealias IntegerLiteralConvertible = Int
>
> }
>
>
> extension Box where Self.BoxType == Double {
>
>
>
>     init(_ value: Double) {
>
>
>
>         self.init()
>
>         self.value = value
>
>     }
>
>
>
>     init(_ value: Int) {
>
>         self.init()
>
>         self.value = Double(value)
>
>     }
>
>
>
>     init(_ value: UInt32) {
>
>         self.init()
>
>         self.value = Double(value)
>
>     }
>
> }
>
>
> extension FloatLiteralType {
>
>
>
>     init<T: Box where T.BoxType == Double >(_ box: T) {
>
>         self.init(box.value)
>
>     }
>
>
>
>     init<T: Box where T.BoxType == Int >(_ box: T) {
>
>         self.init(box.value)
>
>     }
>
> }
>
>
> extension CGFloat {
>
>
>
>     init<T: Box where T.BoxType == Double >(_ box: T) {
>
>         self.init(box.value)
>
>     }
>
>
>
>     init<T: Box where T.BoxType == Int >(_ box: T) {
>
>         self.init(box.value)
>
>     }
>
> }
>
>
> //Adding FloatLiteralConvertible, IntegerLiteralConvertible
>
>
> extension FloatingPointBox where Self.BoxType == Double, Self.FloatLiteralConvertible
> == Double {
>
>
>
>     init(floatLiteral value: Double) {
>
>         self.init(value)
>
>     }
>
>
>
>     init(integerLiteral value: Int) {
>
>         self.init(value)
>
>     }
>
>
>
>     init<T: IntegerType>(_ value: T) {
>
>         self.init(value)
>
>     }
>
> }
>
>
> //
>
> //  Angles.swift
>
> //  Sup
>
> //
>
> //  Created by James Campbell on 22/12/2015.
>
> //  Copyright © 2015 Sup. All rights reserved.
>
> //
>
> // This File defines representations of Degrees and Radians as Type Safe
> Alogrithm Types
>
>
> import Foundation
>
>
> //MARK:- Degree
>
>
> struct Degree: FloatingPointBox {
>
>
>
>     var value: Double = 0
>
>
>
>     init()
>
>     {
>
>     }
>
> }
>
>
> protocol DegreeConvertiable {
>
>
>
>     init(degreeLiteral value: Degree)
>
> }
>
>
> extension Degree: RadianConvertiable {
>
>
>
>     init(radianLiteral value: Radian) {
>
>         self.value = Double(value) * 180.0 / M_PI
>
>     }
>
>
>
>     init(_ value: Radian) {
>
>         self.init(radianLiteral: value)
>
>     }
>
> }
>
>
> //MARK:- Radian
>
>
> struct Radian: FloatingPointBox {
>
>
>
>     var value: Double = 0
>
>
>
>     init()
>
>     {
>
>     }
>
> }
>
>
> protocol RadianConvertiable {
>
>
>
>     init(radianLiteral value: Radian)
>
> }
>
>
> extension Radian: DegreeConvertiable {
>
>
>
>     init(degreeLiteral value: Degree) {
>
>         self.value = Double(value) * M_PI / 180.0
>
>     }
>
>
>
>     init(_ value: Degree) {
>
>         self.init(degreeLiteral: value)
>
>     }
>
> }
>
> let someOptiona: Degreee? = nil
>
>  let degree = someOptional ?? Degree(arc4random_uniform(360))
>
> On Wed, Jan 6, 2016 at 6:57 PM, Félix Cloutier <felixcca at yahoo.ca> wrote:
>
>> I either don't understand or can't reproduce the issue. This code:
>>
>> class Box {
>> let value: Int
>> init(value: Int) {
>> self.value = value
>> }
>> }
>>
>> let test: UInt32 = 4
>> let box = Box(value: test)
>>
>>
>> does not compile ("foo.swift:10:22: error: cannot convert value of type
>> 'UInt32' to expected argument type 'Int'").
>>
>> Félix
>>
>> Le 6 janv. 2016 à 13:17:03, James Campbell <james at supmenow.com> a écrit :
>>
>> protocol Box: CustomStringConvertible, CustomDebugStringConvertible {
>>
>>
>>     typealias FloatLiteralType = Double
>>
>>     typealias IntegerLiteralType = Int
>>
>>     typealias BoxType = Any
>>
>>
>>     var value: BoxType { get set }
>>
>>
>>     init()
>>
>>     init(_ value: BoxType)
>>
>> }
>>
>> extension Box where Self.BoxType == Double {
>>
>>
>>     init(_ value: Double) {
>>
>>
>>         self.init()
>>
>>         self.value = value
>>
>>     }
>>
>>
>>     init(_ value: Int) {
>>
>>         self.init()
>>
>>         self.value = Double(value)
>>
>>     }
>>
>>
>>     init(_ value: UInt32) {
>>
>>         self.init()
>>
>>         self.value = Double(value)
>>
>>     }
>>
>> }
>>
>>
>>
>> Without that last method, Swift tries to give the UInt32 to the Int
>> version of the method which isn't safe in my eyes and I would have expected
>> a compiler error.
>>
>> On Wed, Jan 6, 2016 at 6:14 PM, Félix Cloutier <felixcca at yahoo.ca> wrote:
>>
>>> I don't understand. Can you show a code example?
>>>
>>> Félix
>>>
>>> Le 6 janv. 2016 à 13:02:43, James Campbell via swift-evolution <
>>> swift-evolution at swift.org> a écrit :
>>>
>>> I have a overloaded method for a protocol that takes an Int or double.
>>>
>>> I have an issue with swift calling the Int version when passing in a
>>> UInt32 . Ideally I would prefer the compiler to detect I am about to do
>>> something which will cause an overflow and throw an error.
>>>
>>> I would then have to explicitly add a overloaded UInt32 method or
>>> explicitly convert it to Int like so "Int(uintVariable)".
>>>
>>> --
>>>  Wizard
>>> james at supmenow.com
>>> +44 7523 279 698
>>>  _______________________________________________
>>> swift-evolution mailing list
>>> swift-evolution at swift.org
>>> https://lists.swift.org/mailman/listinfo/swift-evolution
>>>
>>>
>>>
>>
>>
>> --
>>  Wizard
>> james at supmenow.com
>> +44 7523 279 698
>>
>>
>>
>
>
> --
>  Wizard
> james at supmenow.com
> +44 7523 279 698
>



-- 
 Wizard
james at supmenow.com
+44 7523 279 698
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