function SyntaxError (message/*: string */, expected/*: ?string */, found/*: ?string */, offset/*: number */, line/*: number */, column/*: number */) {
  Error.call(this, message)
  this.name = 'SyntaxError'
  this.message = message
  this.expected = expected
  this.found = found
  this.offset = offset
  this.line = line
  this.column = column
}