Method error

packages/compiler/src/expression_parser/parser.ts:1816–1821

* Records an error and skips over the token stream until reaching a recoverable point. See * `this.skip` for more details on token skipping.

(message: string, index = this.index)

   * `this.skip` for more details on token skipping.
   */
  private error(message: string, index = this.index) {
    this.errors.push(
      getParseError(message, this.input, this.getErrorLocationText(index), this.parseSourceSpan),
    );
    this.skip();
  }

  private getErrorLocationText(index: number) {
    return index < this.tokens.length