Method peek

packages/icu-messageformat-parser/parser.ts:1254–1262

* Peek at the *next* Unicode codepoint in the input without advancing the parser. * If the input has been exhausted, then this returns null.

()

   * If the input has been exhausted, then this returns null.
   */
  private peek(): number | null {
    if (this.isEOF()) {
      return null
    }
    const code = this.char()
    const offset = this.offset()
    const nextCode = this.message.charCodeAt(offset + (code >= 0x10000 ? 2 : 1))
    return nextCode ?? null
  }
}

/**