https://github.com/dy/prepr

C/GLSL-preprocessor in JS
https://github.com/dy/prepr

Last synced: 9 months ago
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C/GLSL-preprocessor in JS

• Host: GitHub
• URL: https://github.com/dy/prepr
• Owner: dy
• Created: 2016-03-26T19:59:45.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2023-01-30T16:36:11.000Z (over 3 years ago)
• Last Synced: 2025-08-18T05:29:11.860Z (10 months ago)
• Language: JavaScript
• Homepage: https://npmjs.org/package/prepr
• Size: 84 KB
• Stars: 8
• Watchers: 2
• Forks: 1
• Open Issues: 3
• Metadata Files:
  • Readme: readme.md

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README

          
> Preprocess any string in C/GLSL-preprocessor fashion.

[![npm install prepr](https://nodei.co/npm/prepr.png?mini=true)](https://npmjs.org/package/prepr/)

```js

import prepr from 'prepr';

prepr(`

	#define A 2;

	#ifdef A

	var a = A;

	#endif

	#if A > 40

	//too far

	#elif A < 1

	//too close

	#else

	//about right

	#endif

	var b = myVar;

	var c = myMacro('xyz');

`, {

	myVar: 1,

	myMacro: function (arg) { return arg; }

});

// ↓

`

var a = 2;

//about right

var b = 1;

var c = 'xyz';

`

```

The primary purpose is to preprocess code for [glsl-transpiler](https://github.com/stackgl/glsl-transpiler), so some [C-preprocessor](https://gcc.gnu.org/onlinedocs/cpp/index.html#Top) functionality is absent, but the project is welcome to forks and PRs.

## Related

* [compile-js-like-c](https://github.com/ParksProjets/compile-js-like-c) — another C preprocessor for js.