https://github.com/IwanKaramazow/PipeFirst

Fast pipe, pipe first as a syntax transform
https://github.com/IwanKaramazow/PipeFirst

Last synced: 2 days ago
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Fast pipe, pipe first as a syntax transform

• Host: GitHub
• URL: https://github.com/IwanKaramazow/PipeFirst
• Owner: IwanKaramazow
• Created: 2018-11-12T17:55:38.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2020-05-05T21:40:19.000Z (over 4 years ago)
• Last Synced: 2024-11-10T19:56:25.189Z (6 days ago)
• Language: OCaml
• Size: 31.3 KB
• Stars: 27
• Watchers: 3
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# Pipe First ppx [![Build Status](https://travis-ci.org/IwanKaramazow/PipeFirst.svg?branch=master)](https://travis-ci.org/IwanKaramazow/PipeFirst)

Pipe first as a syntax transform. Transforms expressions containing the `|.` (Ocaml) or `->` (Reason) operator.

Pipes the left side as first argument of the right side.

_Reason_

```reason

/* validateAge(getAge(parseData(person))) */

person

->parseData

->getAge

->validateAge;

/* Some(preprocess(name)); */

name->preprocess->Some;

/* f(a, ~b, ~c) */

a->f(~b, ~c)

```

_Ocaml_

```ocaml

(* validateAge (getAge (parseData person)) *)

person

|. parseData

|. getAge

|. validateAge

(* Some(preprocess name) *)

name |. preprocess |. Some;

(*f a ~b ~c *)

a |. f ~b ~c

```

## Usage with Dune

`dune` file

```

(executable

  (name hello_world)

  (preprocess  (pps ppx_pipe_first))

```

Reason: implementation of the `hello_world.re` file

```reason

let () =

  1000

  ->string_of_int

  ->print_endline;

```

Ocaml: implementation of the `hello_world.ml` file

```ocaml

let () =

  1000

  |. string_of_int

  |. print_endline

```

## Developing:

```

npm install -g esy

git clone 

esy install

esy build

```

## Running Tests:

```

esy test

```