rustlings_solution

The solutions to rustlings exercises.

Exercise Book Chapter
variables §3.1
functions §3.3
if §3.5
move_semantics §4.1
primitive_types §4.3
structs §5.1
enums §6
modules §7
collections §8.1, §8.3
strings §8.2
error_handling §9
generics §10
option §10.1
traits §10.2
tests §11.1
standard_library_types §13.2
threads §16.1
macros §19.6
clippy n/a
conversions n/a