/**
 * Builds an array of string and something else, and ensures adjacent strings
 * are merged together.
 */
export class StringOrTBuilder<T> {
  public readonly items: Array<string | T> = [];

  public push(item: string | T) {
    const prev = this.items[this.items.length - 1];
    if (typeof item === "string" && typeof prev === "string") {
      this.items[this.items.length - 1] = prev + item;
    } else {
      this.items.push(item);
    }
  }
}