--- /dev/null
+'use strict';
+const errorEx = require('error-ex');
+const fallback = require('./vendor/parse');
+
+function appendPosition(message) {
+ const posRe = / at (\d+:\d+) in/;
+ const numbers = posRe.exec(message);
+ return message.replace(posRe, ' in') + ':' + numbers[1];
+}
+
+const JSONError = errorEx('JSONError', {
+ fileName: errorEx.append('in %s'),
+ appendPosition: {
+ message: (shouldAppend, original) => {
+ if (shouldAppend) {
+ original[0] = appendPosition(original[0]);
+ }
+ return original;
+ }
+ }
+});
+
+module.exports = (input, reviver, filename) => {
+ if (typeof reviver === 'string') {
+ filename = reviver;
+ reviver = null;
+ }
+
+ try {
+ try {
+ return JSON.parse(input, reviver);
+ } catch (err) {
+ fallback.parse(input, {
+ mode: 'json',
+ reviver
+ });
+
+ throw err;
+ }
+ } catch (err) {
+ const jsonErr = new JSONError(err);
+
+ if (filename) {
+ jsonErr.fileName = filename;
+ jsonErr.appendPosition = true;
+ }
+
+ throw jsonErr;
+ }
+};