experiment/impl_trait is essentially a reimplementation of all the parsers and combinators using the same baseline code as
feature/input_trait is intended to be chomp 0.3, and
experiment/impl_trait either 1.0 or maybe a new crate
chomp2 (useful since
feature/input_trait still works on stable while
experiment/impl_trait requires the latest nightly version of rustc).
Both share the same reposiotory and dependencies, just two different branches. Same code is used for both tests, with slight adjustment for how parsers are structured.
rustc --version rustc 1.13.0-nightly (1576de0ce 2016-08-21)