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fcanas/Distance.swift

Created May 21, 2015 15:11
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  1. fcanas created this gist May 21, 2015.
    18 changes: 18 additions & 0 deletions Distance.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,18 @@
    public struct Distance :NumericType {
    public var value :Double
    public init(_ value: Double) {
    self.value = value
    }
    }

    extension Distance :IntegerLiteralConvertible {
    public init(integerLiteral: IntegerLiteralType) {
    self.init(Double(integerLiteral))
    }
    }

    extension Distance :FloatLiteralConvertible {
    public init(floatLiteral: FloatLiteralType) {
    self.init(Double(floatLiteral))
    }
    }
    36 changes: 36 additions & 0 deletions NumericType.swift
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    Original file line number Diff line number Diff line change
    @@ -0,0 +1,36 @@
    public protocol NumericType : Comparable, FloatLiteralConvertible, IntegerLiteralConvertible, SignedNumberType {
    var value :Double { set get }
    init(_ value: Double)
    }

    public func % <T :NumericType> (lhs: T, rhs: T) -> T {
    return T(lhs.value % rhs.value)
    }

    public func + <T :NumericType> (lhs: T, rhs: T) -> T {
    return T(lhs.value + rhs.value)
    }

    public func - <T :NumericType> (lhs: T, rhs: T) -> T {
    return T(lhs.value - rhs.value)
    }

    public func < <T :NumericType> (lhs: T, rhs: T) -> Bool {
    return lhs.value < rhs.value
    }

    public func == <T :NumericType> (lhs: T, rhs: T) -> Bool {
    return lhs.value == rhs.value
    }

    public prefix func - <T: NumericType> (number: T) -> T {
    return T(-number.value)
    }

    public func += <T :NumericType> (inout lhs: T, rhs: T) {
    lhs.value = lhs.value + rhs.value
    }

    public func -= <T :NumericType> (inout lhs: T, rhs: T) {
    lhs.value = lhs.value - rhs.value
    }