//
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// FloatingPointExtensions.swift
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// SwifterSwift
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//
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// Created by Omar Albeik on 7/23/17.
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// Copyright © 2017 SwifterSwift
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//
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#if canImport(Foundation)
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import Foundation
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#endif
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// MARK: - Properties
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public extension FloatingPoint {
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/// SwifterSwift: Absolute value of number.
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var abs: Self {
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return Swift.abs(self)
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}
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/// SwifterSwift: Check if number is positive.
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var isPositive: Bool {
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return self > 0
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}
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/// SwifterSwift: Check if number is negative.
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var isNegative: Bool {
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return self < 0
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}
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#if canImport(Foundation)
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/// SwifterSwift: Ceil of number.
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var ceil: Self {
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return Foundation.ceil(self)
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}
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#endif
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/// SwifterSwift: Radian value of degree input.
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var degreesToRadians: Self {
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return Self.pi * self / Self(180)
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}
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#if canImport(Foundation)
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/// SwifterSwift: Floor of number.
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var floor: Self {
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return Foundation.floor(self)
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}
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#endif
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/// SwifterSwift: Degree value of radian input.
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var radiansToDegrees: Self {
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return self * Self(180) / Self.pi
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}
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}
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// MARK: - Operators
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// swiftlint:disable identifier_name
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infix operator ±
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/// SwifterSwift: Tuple of plus-minus operation.
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///
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/// - Parameters:
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/// - lhs: number
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/// - rhs: number
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/// - Returns: tuple of plus-minus operation ( 2.5 ± 1.5 -> (4, 1)).
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func ± <T: FloatingPoint> (lhs: T, rhs: T) -> (T, T) {
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// http://nshipster.com/swift-operators/
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return (lhs + rhs, lhs - rhs)
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}
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// swiftlint:enable identifier_name
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// swiftlint:disable identifier_name
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prefix operator ±
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/// SwifterSwift: Tuple of plus-minus operation.
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///
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/// - Parameter int: number
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/// - Returns: tuple of plus-minus operation (± 2.5 -> (2.5, -2.5)).
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public prefix func ± <T: FloatingPoint> (number: T) -> (T, T) {
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// http://nshipster.com/swift-operators/
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return 0 ± number
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}
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// swiftlint:enable identifier_name
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