| #![feature(rustc_private)] |
| //@ edition: 2021 |
| |
| // Checks the error messages produced by `#[derive(TryFromU32)]`. |
| |
| extern crate rustc_macros; |
| |
| use rustc_macros::TryFromU32; |
| |
| #[derive(TryFromU32)] |
| struct MyStruct {} //~ ERROR type is not an enum |
| |
| #[derive(TryFromU32)] |
| enum NonTrivial { |
| A, |
| B(), |
| C {}, |
| D(bool), //~ ERROR enum variant cannot have fields |
| E(bool, bool), //~ ERROR enum variant cannot have fields |
| F { x: bool }, //~ ERROR enum variant cannot have fields |
| G { x: bool, y: bool }, //~ ERROR enum variant cannot have fields |
| } |
| |
| fn main() {} |
