Method isNumberStart

src/parser/token-reader.ts:187–194

(byte: number)

  }

  private isNumberStart(byte: number): boolean {
    return (
      (byte >= DIGIT_0 && byte <= DIGIT_9) || // 0-9
      byte === CHAR_PLUS || // +
      byte === CHAR_MINUS || // -
      byte === CHAR_PERIOD // .
    );
  }

  private readNumber(position: number): NumberToken | KeywordToken {
    const start = this.scanner.position;