diff options
| -rw-r--r-- | src/librustc_error_codes/error_codes/E0432.md | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/src/librustc_error_codes/error_codes/E0432.md b/src/librustc_error_codes/error_codes/E0432.md index b562a85b785..a6e2acac5d2 100644 --- a/src/librustc_error_codes/error_codes/E0432.md +++ b/src/librustc_error_codes/error_codes/E0432.md @@ -6,14 +6,20 @@ Erroneous code example: use something::Foo; // error: unresolved import `something::Foo`. ``` -Paths in `use` statements are relative to the crate root. To import items -relative to the current and parent modules, use the `self::` and `super::` -prefixes, respectively. Also verify that you didn't misspell the import -name and that the import exists in the module from where you tried to -import it. Example: +In Rust 2015, paths in `use` statements are relative to the crate root. To +import items relative to the current and parent modules, use the `self::` and +`super::` prefixes, respectively. + +In Rust 2018, paths in `use` statements are relative to the current module +unless they begin with the name of a crate or a literal `crate::`, in which +case they start from the crate root. As in Rust 2015 code, the `self::` and +`super::` prefixes refer to the current and parent modules respectively. + +Also verify that you didn't misspell the import name and that the import exists +in the module from where you tried to import it. Example: ``` -use self::something::Foo; // ok! +use self::something::Foo; // Ok. mod something { pub struct Foo; @@ -21,12 +27,21 @@ mod something { # fn main() {} ``` -Or, if you tried to use a module from an external crate, you may have missed -the `extern crate` declaration (which is usually placed in the crate root): +If you tried to use a module from an external crate and are using Rust 2015, +you may have missed the `extern crate` declaration (which is usually placed in +the crate root): -``` -extern crate core; // Required to use the `core` crate +```edition2015 +extern crate core; // Required to use the `core` crate in Rust 2015. use core::any; # fn main() {} ``` + +In Rust 2018 the `extern crate` declaration is not required and you can instead +just `use` it: + +```edition2018 +use core::any; // No extern crate required in Rust 2018. +# fn main() {} +``` |