Method bumpIf

packages/icu-messageformat-parser/parser.ts:1187–1195

* If the substring starting at the current position of the parser has * the given prefix, then bump the parser to the character immediately * following the prefix and return true. Otherwise, don't bump the parser * and return false.

(prefix: string)

   * and return false.
   */
  private bumpIf(prefix: string): boolean {
    if (this.message.startsWith(prefix, this.offset())) {
      for (let i = 0; i < prefix.length; i++) {
        this.bump()
      }
      return true
    }
    return false
  }

  /**
   * Bump the parser until the pattern character is found and return `true`.