Turn into module, use justin

index.js

@@ -3,12 +3,12 @@
  * @module  prepr
  */
 
-var paren = require('parenthesis');
-var balanced = require('balanced-match');
-var extend = require('object-assign');
-var escaper = require('escaper');
-var ee = require('expression-eval');
-var stripComments = require('strip-json-comments')
+import paren from 'parenthesis';
+import balanced from 'balanced-match';
+import extend from 'object-assign';
+import escaper from 'escaper';
+import createFn from 'subscript/justin.js';
+import stripComments from 'strip-json-comments';
 
 
 /**
@@ -313,8 +313,8 @@ function preprocess (what, how) {
 				expr = stripComments(process(expr));
 
 				try {
-					var expr = ee.parse(expr);
-					result = ee.eval(expr, macros);
+					var evaluate = createFn(expr);
+					result = evaluate(expr, macros);
 				} catch (e) {
 					result = false;
 				}
@@ -341,4 +341,4 @@ function preprocess (what, how) {
 }
 
 
-module.exports = preprocess;
+export default preprocess;

package.json

@@ -3,6 +3,7 @@
   "version": "1.2.5",
   "description": "Preprocess string in C/GLSL-preprocessor fashion",
   "main": "index.js",
+  "type": "module",
   "scripts": {
     "test": "node test.js",
     "test:browser": "budo test.js"
@@ -36,9 +37,9 @@
   "dependencies": {
     "balanced-match": "^2.0.0",
     "escaper": "^2.5.3",
-    "expression-eval": "^5.0.0",
     "object-assign": "^4.1.1",
     "parenthesis": "^3.1.8",
-    "strip-json-comments": "^3.1.1"
+    "strip-json-comments": "^3.1.1",
+    "subscript": "^7.3.1"
   }
 }

test.js

@@ -1,7 +1,7 @@
-var test = require('tape');
-var prepr = require('./');
-var clean = require('cln');
-var assert = require('assert');
+import test from 'tape';
+import prepr from './index.js';
+import clean from 'cln';
+import assert from 'assert';
 
 test('Object macros', function (t) {
 	t.equal(clean(prepr(`
@@ -573,7 +573,6 @@ test('Real use-case', function (t) {
 
 
 test('Too many comments', function (t) {
-	var escaper = require('escaper')
 	var src = `
 		/* a */
 		// b