Method sourceSpan

packages/compiler/src/expression_parser/parser.ts:675–684

(start: number, artificialEndIndex?: number)

  }

  private sourceSpan(start: number, artificialEndIndex?: number): AbsoluteSourceSpan {
    const serial = `${start}@${this.inputIndex}:${artificialEndIndex}`;
    if (!this.sourceSpanCache.has(serial)) {
      this.sourceSpanCache.set(
        serial,
        this.span(start, artificialEndIndex).toAbsolute(this.absoluteOffset),
      );
    }
    return this.sourceSpanCache.get(serial)!;
  }

  private advance() {
    this.index++;