swift-interval

Interval Arithmetic in Swift with Interval Type

Synopsis

import Interval         // needed only if you "make repl"
let about1 = 1.0 ± 0.1  // 0.9...1.1
about1+about1           // 1.8...2.2
about1-about1           // -0.2...0.2
about1*about1           // 0.81...1.21
about1/about1           // 0.818181818181818...1.22222222222222

Prerequisite

Swift 5.0 or better, OS X or Linux.

Usage

in your project:

Just add interval.swift to it.

with playground

Have fun with Interval.playground that is a part of this git repo.

When you use it, make sure you turn on the left pane (it’s off right after you pulled since UI settings are .gitignored). As you see above, this playground consists of multiple pages and sources.

with your playground

Just drop interval.swift to Sources. In git Interval.playground/Sources/interval.swift is a symlink thereto.

REPL via command line:

OS X with Xcode

git clone https://github.com/dankogai/swift-interval.git
cd swift-interval
make repl

Linux

git clone https://github.com/dankogai/swift-interval.git
cd swift-interval
make SWIFTPATH=${YOUR_SWIFT_PATH} repl # ${YOUR_SWIFT_PATH}=~/swift/usr/bin in my case

Prerequisite

Swift 5 or better, OS X or Linux to build.