How read serial without consume byte

[Albuquerster]

Hi!

I have to develop API that when arrive byte by serial communication, only consult the serial without consume byte of serial fifo.
Is it possible?

Thanks,

[koothkeeper]

Depending on what class you use, it's possible. You can use putback() in istream for example:

http://www.cplusplus.com/reference/istream/istream/putback/