prepr

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


``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, so some C-preprocessor functionality is absent, but the project is welcome to forks and PRs.

Related

* compile-js-like-c — another C preprocessor for js.