There is a number of deficiencies with Swift and Numbers. Especially when
trying to be clever with generics.
- The API exposes built in types like`BuiltIn.Word` as the return type of
some APIs but there is no way to use said types.
- We have a Float and a Float80. Float and Doubles can't be initialised
(via init) with anything but Integer values but Float80 can be initialized
with both Floating Point and Integer
- We have a SignedNumberType but no UnsignedNumberType, All the floating
points use this protocol, so shouldn't this be NumberType ?
- SignedIntegerType and UnsignedIntegerType have a way of generically
constructing an Int as long as you cast it to the Maximum Int or UInt. But
there is no such thing for Floating Point Numbers.
- We have Float80 and a typealised Float32 and Float64. Why couldn't have
triple as an extra type name, as having one true type with a number is
confusing ?
- If all number types could be initilized with all number types, then a lot
of the constructors could be in the NumberType protocol.
Just in general it was hard to extend integers and floating point types.
For example in my code I wanted to pass a struct that contained a value to
any Floating Point or Integer and it would convert.
This is what I had to do, which is far too much and even sure I'm not
convinced it will work in every condition.
*protocol Box: CustomStringConvertible, CustomDebugStringConvertible {*
* typealias BoxType = Any*
* var value: BoxType { get set }*
* init()*
* init(_ value: BoxType)*
*}*
*protocol AngleType: Box {*
* typealias BoxType = Double*
*}*
*//Mark:- Box - FloatingPointType Conversion*
*extension SignedIntegerType {*
* init<T: Box where T.BoxType == Float80>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Double>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Float>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int8>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int16>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int32>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int64>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt8>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt16>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt32>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt64>(_ value: T) {*
* self.init(IntMax(value.value))*
* }*
*}*
*extension UnsignedIntegerType {*
* init<T: Box where T.BoxType == Float80>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Double>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Float>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int8>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int16>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int32>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == Int64>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt8>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt16>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt32>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
* init<T: Box where T.BoxType == UInt64>(_ value: T) {*
* self.init(UIntMax(value.value))*
* }*
*}*
*extension Float*
*{*
* init<T: Box where T.BoxType == Float>(_ value: T)*
* {*
* self.value = value.value.value*
* }*
*}*
*extension Double*
*{*
* init<T: Box where T.BoxType == Double>(_ value: T)*
* {*
* self.value = value.value.value*
* }*
*}*
*extension Float80*
*{*
* init<T: Box where T.BoxType == Float80>(_ value: T)*
* {*
* self.init(value.value)*
* }*
*}*
*extension FloatingPointType {*
* init<T: Box where T.BoxType == Int>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == Int8>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == Int16>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == Int32>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == Int64>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == UInt>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == UInt8>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == UInt16>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == UInt32>(_ value: T) {*
* self.init(value.value)*
* }*
* init<T: Box where T.BoxType == UInt64>(_ value: T) {*
* self.init(value.value)*
* }*
*}*
···
--
Wizard
james@supmenow.com
+44 7523 279 698