abnf-core is used at run time in 6 crates (4 directly). It's used at build time in 10 crates (of which 2 optionally, 0 directly).

Depender (with downloads and own rev deps) abnf-core version
12K 1 abnf ^0.5.0
2.2K smtp-codec ^0.5
imap-codec ^0.5
pop3-codec ^0.5