There should be no extra cost associated with simply adding any use statements for types which the derive system depends upon. If the crates do not exist, cargo will notify the user pretty clearly as to the issue.
This is just a usability enhancement. It is annoying to have to declare use statements for types which derives require.
There should be no extra cost associated with simply adding any
use
statements for types which the derive system depends upon. If the crates do not exist, cargo will notify the user pretty clearly as to the issue.This is just a usability enhancement. It is annoying to have to declare use statements for types which derives require.