js-yaml/lib/exception.js

YAML 1.2 parser and serializer

// YAML error class. http://stackoverflow.com/questions/8458984
//
'use strict'

function formatError (exception, compact) {
  let where = ''
  const message = exception.reason || '(unknown reason)'

  if (!exception.mark) return message

  if (exception.mark.name) {
    where += 'in "' + exception.mark.name + '" '
  }

  where += '(' + (exception.mark.line + 1) + ':' + (exception.mark.column + 1) + ')'

  if (!compact && exception.mark.snippet) {
    where += '\n\n' + exception.mark.snippet
  }

  return message + ' ' + where
}

function YAMLException (reason, mark) {
  // Super constructor
  Error.call(this)

  this.name = 'YAMLException'
  this.reason = reason
  this.mark = mark
  this.message = formatError(this, false)

  // Include stack trace in error object
  if (Error.captureStackTrace) {
    // Chrome and NodeJS
    Error.captureStackTrace(this, this.constructor)
  } else {
    // FF, IE 10+ and Safari 6+. Fallback for others
    this.stack = (new Error()).stack || ''
  }
}

// Inherit from Error
YAMLException.prototype = Object.create(Error.prototype)
YAMLException.prototype.constructor = YAMLException

YAMLException.prototype.toString = function toString (compact) {
  return this.name + ': ' + formatError(this, compact)
}

module.exports = YAMLException