My use case is generating and parsing AT commands
I'm looking for something similar to Boost.Spirit or https://github.com/ColinH/PEGTL , but friendly to an embedded environment (mbed OS) and doesn't need to be quite as powerful as the aforementioned. The mbed OS ATParser swings the other way and is a bit too weak/scanf-y for my tastes (no dispresect to the ATParser folks)
Boost.Spirit I can't get to compile under that environment and I am hesitant to try PEGTL for similar reasons in addition to it being a bit complex.