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Diffstat (limited to '')
-rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0658.md | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0658.md b/compiler/rustc_error_codes/src/error_codes/E0658.md new file mode 100644 index 000000000..24245a38a --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0658.md @@ -0,0 +1,28 @@ +An unstable feature was used. + +Erroneous code example: + +```compile_fail,E0658 +#[repr(u128)] // error: use of unstable library feature 'repr128' +enum Foo { + Bar(u64), +} +``` + +If you're using a stable or a beta version of rustc, you won't be able to use +any unstable features. In order to do so, please switch to a nightly version of +rustc (by using [rustup]). + +If you're using a nightly version of rustc, just add the corresponding feature +to be able to use it: + +``` +#![feature(repr128)] + +#[repr(u128)] // ok! +enum Foo { + Bar(u64), +} +``` + +[rustup]: https://rust-lang.github.io/rustup/concepts/channels.html |