--- /dev/null
+'use strict'
+
+module.exports = parseJson
+function parseJson (txt, reviver, context) {
+ context = context || 20
+ try {
+ return JSON.parse(txt, reviver)
+ } catch (e) {
+ if (typeof txt !== 'string') {
+ const isEmptyArray = Array.isArray(txt) && txt.length === 0
+ const errorMessage = 'Cannot parse ' +
+ (isEmptyArray ? 'an empty array' : String(txt))
+ throw new TypeError(errorMessage)
+ }
+ const syntaxErr = e.message.match(/^Unexpected token.*position\s+(\d+)/i)
+ const errIdx = syntaxErr
+ ? +syntaxErr[1]
+ : e.message.match(/^Unexpected end of JSON.*/i)
+ ? txt.length - 1
+ : null
+ if (errIdx != null) {
+ const start = errIdx <= context
+ ? 0
+ : errIdx - context
+ const end = errIdx + context >= txt.length
+ ? txt.length
+ : errIdx + context
+ e.message += ` while parsing near '${
+ start === 0 ? '' : '...'
+ }${txt.slice(start, end)}${
+ end === txt.length ? '' : '...'
+ }'`
+ } else {
+ e.message += ` while parsing '${txt.slice(0, context * 2)}'`
+ }
+ throw e
+ }
+}