https://github.com/billstclair/elm-bitwise-infix
Infix versions of Elm's Bitwise module functions
https://github.com/billstclair/elm-bitwise-infix
Last synced: about 1 month ago
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Infix versions of Elm's Bitwise module functions
- Host: GitHub
- URL: https://github.com/billstclair/elm-bitwise-infix
- Owner: billstclair
- License: mit
- Created: 2016-10-13T12:54:58.000Z (over 9 years ago)
- Default Branch: master
- Last Pushed: 2016-11-14T20:54:54.000Z (over 9 years ago)
- Last Synced: 2025-03-02T19:43:05.010Z (over 1 year ago)
- Language: Elm
- Homepage:
- Size: 3.91 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
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README
# Infix versions of Elm's Bitwise module functions
When converting code from JavaScript, it's a real pain to change all the bitwise operators from infix to prefix. This module makes that unnecessary. You just add a twiddle prefix (~) to the operators.
```Bitwise.not``` has no infix operator, since Elm doesn't provide single argument "infix" operators. So I named it ```BitwiseInfix.lognot```, in honor of its Common Lisp name.
All the operators are left associative.
I mirrored the [JavaScript precedences](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence), putting the shift operators at lower precedence than arithmetic, but higher than comparison, and the others lower than comparison.
```(~<<)```, ```(~>>)```, and ```(~>>>)``` have a precedence of 5.
```(~&)``` has a precedence of 3.
```(~^)``` has a precedence of 2.
```(~|)``` has a precedence of 1.
Examples:
```
import BitwiseInfix exposing (..)
3 ~& 1 ~| 4 ~& 12 -- 5
3 ~& (1 ~| 4) ~& 12 -- 0
2 ~<< 1 ~| 2 -- 6
2 ~<< (1 ~| 2) -- 16
1 ~| 2 ~^ 2 ~| 1 -- 1
(1 ~| 2) ~^ (2 ~| 1) -- 0
3 ~& 1 ~^ 4 ~& 12 -- 5
3 ~& (1 ~^ 4) ~& 12 -- 0
9 ~>> 1 ~<< 1 -- 8
9 ~>> (1 ~<< 1) -- 2
```