The Rust code of fieldopt is compiled from the crates vendored in
src/rust/vendor.tar.xz. Their authors and licences are listed below. The
crate fieldopt-core is written by the authors of this package; the others
are the extendr bindings and their dependencies.

Crate (version)            Authors                                   Licence
-------------------------  ----------------------------------------  ------------------------------------
fieldopt-core (0.10.0)     André Leite, Raydonal Ospina,             GPL-3.0-or-later
                           Cristiano Ferraz
extendr-api (0.9.0)        The extendr authors                       MIT
extendr-ffi (0.9.0)        The extendr authors                       MIT
extendr-macros (0.9.0)     The extendr authors                       MIT
lazy_static (1.5.1)        Marvin Löbel                              MIT OR Apache-2.0
once_cell (1.21.4)         Aleksey Kladov                            MIT OR Apache-2.0
paste (1.0.15)             David Tolnay                              MIT OR Apache-2.0
proc-macro2 (1.0.107)      David Tolnay, Alex Crichton               MIT OR Apache-2.0
quote (1.0.47)             David Tolnay                              MIT OR Apache-2.0
readonly (0.2.14)          David Tolnay                              MIT OR Apache-2.0
syn (2.0.119, 3.0.6)       David Tolnay                              MIT OR Apache-2.0
unicode-ident (1.0.26)     David Tolnay                              (MIT OR Apache-2.0) AND Unicode-3.0

Repositories: https://github.com/castlaboratory/fieldopt-core,
https://github.com/extendr/extendr, https://github.com/rust-lang-nursery/lazy-static.rs,
https://github.com/matklad/once_cell, https://github.com/dtolnay/paste,
https://github.com/dtolnay/proc-macro2, https://github.com/dtolnay/quote,
https://github.com/dtolnay/readonly, https://github.com/dtolnay/syn,
https://github.com/dtolnay/unicode-ident.