Error code E0433
An undeclared crate, module, or type was used.
Erroneous code example:
#![allow(unused)] fn main() { let map = HashMap::new(); // error: failed to resolve: use of undeclared type `HashMap` }
Please verify you didn't misspell the type/module's name or that you didn't forget to import it:
#![allow(unused)] fn main() { use std::collections::HashMap; // HashMap has been imported. let map: HashMap<u32, u32> = HashMap::new(); // So it can be used! }
If you've expected to use a crate name:
#![allow(unused)] fn main() { use ferris_wheel::BigO; // error: failed to resolve: use of undeclared crate or module `ferris_wheel` }
Make sure the crate has been added as a dependency in Cargo.toml
.
To use a module from your current crate, add the crate::
prefix to the path.