rust/tests/ui/const-generics/issues/issue-61336.rs

fn f<T: Copy, const N: usize>(x: T) -> [T; N] {
    [x; N]
}

fn g<T, const N: usize>(x: T) -> [T; N] {
    [x; N]
    //~^ ERROR the trait bound `T: Copy` is not satisfied
}

fn main() {
    let x: [u32; 5] = f::<u32, 5>(3);
    assert_eq!(x, [3u32; 5]);
}
typeck: Fix const generic in repeat param ICE. This commit fixes an ICE that occured when a const generic was used in a repeat expression. This was due to the code expecting the length of the repeat expression to be const evaluatable to a constant, but a const generic parameter is not (however, it can be made into a constant). 2019-06-09 14:54:28 -05:00			`fn f<T: Copy, const N: usize>(x: T) -> [T; N] {`
			`[x; N]`
			`}`

			`fn g<T, const N: usize>(x: T) -> [T; N] {`
			`[x; N]`
pretty: trim paths of unique symbols If a symbol name can only be imported from one place for a type, and as long as it was not glob-imported anywhere in the current crate, we can trim its printed path and print only the name. This has wide implications on error messages with types, for example, shortening `std::vec::Vec` to just `Vec`, as long as there is no other `Vec` importable anywhere. This adds a new '-Z trim-diagnostic-paths=false' option to control this feature. On the good path, with no diagnosis printed, we should try to avoid issuing this query, so we need to prevent trimmed_def_paths query on several cases. This change also relies on a previous commit that differentiates between `Debug` and `Display` on various rustc types, where the latter is trimmed and presented to the user and the former is not. 2020-09-02 02:40:56 -05:00			//~^ ERROR the trait bound `T: Copy` is not satisfied
typeck: Fix const generic in repeat param ICE. This commit fixes an ICE that occured when a const generic was used in a repeat expression. This was due to the code expecting the length of the repeat expression to be const evaluatable to a constant, but a const generic parameter is not (however, it can be made into a constant). 2019-06-09 14:54:28 -05:00			`}`

			`fn main() {`
			`let x: [u32; 5] = f::<u32, 5>(3);`
			`assert_eq!(x, [3u32; 5]);`
			`}`