rust/tests/ui/issues/issue-8898.rs

//@ run-pass

fn assert_repr_eq<T: std::fmt::Debug>(obj : T, expected : String) {
    assert_eq!(expected, format!("{:?}", obj));
}

pub fn main() {
    let abc = [1, 2, 3];
    let tf = [true, false];
    let x  = [(), ()];
    let slice = &x[..1];

    assert_repr_eq(&abc[..], "[1, 2, 3]".to_string());
    assert_repr_eq(&tf[..], "[true, false]".to_string());
    assert_repr_eq(&x[..], "[(), ()]".to_string());
    assert_repr_eq(slice, "[()]".to_string());
    assert_repr_eq(&x[..], "[(), ()]".to_string());
}
[AUTO-GENERATED] Migrate ui tests from `//` to `//@` directives 2024-02-16 20:02:50 +00:00			`//@ run-pass`
rustdoc: Replace no-pretty-expanded with pretty-expanded Now that features must be declared expanded source often does not compile. This adds 'pretty-expanded' to a bunch of test cases that still work. 2015-03-22 20:13:15 +00:00
std: Rename Show/String to Debug/Display This commit is an implementation of [RFC 565][rfc] which is a stabilization of the `std::fmt` module and the implementations of various formatting traits. Specifically, the following changes were performed: [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0565-show-string-guidelines.md * The `Show` trait is now deprecated, it was renamed to `Debug` * The `String` trait is now deprecated, it was renamed to `Display` * Many `Debug` and `Display` implementations were audited in accordance with the RFC and audited implementations now have the `#[stable]` attribute * Integers and floats no longer print a suffix * Smart pointers no longer print details that they are a smart pointer * Paths with `Debug` are now quoted and escape characters * The `unwrap` methods on `Result` now require `Display` instead of `Debug` * The `Error` trait no longer has a `detail` method and now requires that `Display` must be implemented. With the loss of `String`, this has moved into libcore. * `impl<E: Error> FromError<E> for Box<Error>` now exists * `derive(Show)` has been renamed to `derive(Debug)`. This is not currently warned about due to warnings being emitted on stage1+ While backwards compatibility is attempted to be maintained with a blanket implementation of `Display` for the old `String` trait (and the same for `Show`/`Debug`) this is still a breaking change due to primitives no longer implementing `String` as well as modifications such as `unwrap` and the `Error` trait. Most code is fairly straightforward to update with a rename or tweaks of method calls. [breaking-change] Closes #21436 2015-01-20 23:45:07 +00:00			`fn assert_repr_eq<T: std::fmt::Debug>(obj : T, expected : String) {`
core: split into fmt::Show and fmt::String fmt::Show is for debugging, and can and should be implemented for all public types. This trait is used with `{:?}` syntax. There still exists #[derive(Show)]. fmt::String is for types that faithfully be represented as a String. Because of this, there is no way to derive fmt::String, all implementations must be purposeful. It is used by the default format syntax, `{}`. This will break most instances of `{}`, since that now requires the type to impl fmt::String. In most cases, replacing `{}` with `{:?}` is the correct fix. Types that were being printed specifically for users should receive a fmt::String implementation to fix this. Part of #20013 [breaking-change] 2014-12-20 08:09:35 +00:00			`assert_eq!(expected, format!("{:?}", obj));`
Fix #8898 2013-09-02 01:32:03 +00:00			`}`

			`pub fn main() {`
std: Rename Show/String to Debug/Display This commit is an implementation of [RFC 565][rfc] which is a stabilization of the `std::fmt` module and the implementations of various formatting traits. Specifically, the following changes were performed: [rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0565-show-string-guidelines.md * The `Show` trait is now deprecated, it was renamed to `Debug` * The `String` trait is now deprecated, it was renamed to `Display` * Many `Debug` and `Display` implementations were audited in accordance with the RFC and audited implementations now have the `#[stable]` attribute * Integers and floats no longer print a suffix * Smart pointers no longer print details that they are a smart pointer * Paths with `Debug` are now quoted and escape characters * The `unwrap` methods on `Result` now require `Display` instead of `Debug` * The `Error` trait no longer has a `detail` method and now requires that `Display` must be implemented. With the loss of `String`, this has moved into libcore. * `impl<E: Error> FromError<E> for Box<Error>` now exists * `derive(Show)` has been renamed to `derive(Debug)`. This is not currently warned about due to warnings being emitted on stage1+ While backwards compatibility is attempted to be maintained with a blanket implementation of `Display` for the old `String` trait (and the same for `Show`/`Debug`) this is still a breaking change due to primitives no longer implementing `String` as well as modifications such as `unwrap` and the `Error` trait. Most code is fairly straightforward to update with a rename or tweaks of method calls. [breaking-change] Closes #21436 2015-01-20 23:45:07 +00:00			`let abc = [1, 2, 3];`
Fix #8898 2013-09-02 01:32:03 +00:00			`let tf = [true, false];`
			`let x = [(), ()];`
cleanup: `&foo[0..a]` -> `&foo[..a]` 2015-01-12 21:59:18 +00:00			`let slice = &x[..1];`
Fix #8898 2013-09-02 01:32:03 +00:00
Implement pretty-printing of `..` and update tests. Update tests to change all `&expr[]` to `&expr[..]` to make sure pretty printing passes. 2015-02-05 16:58:30 +00:00			`assert_repr_eq(&abc[..], "[1, 2, 3]".to_string());`
			`assert_repr_eq(&tf[..], "[true, false]".to_string());`
			`assert_repr_eq(&x[..], "[(), ()]".to_string());`
Remove libdebug and update tests. 2014-10-15 01:07:11 +00:00			`assert_repr_eq(slice, "[()]".to_string());`
Implement pretty-printing of `..` and update tests. Update tests to change all `&expr[]` to `&expr[..]` to make sure pretty printing passes. 2015-02-05 16:58:30 +00:00			`assert_repr_eq(&x[..], "[(), ()]".to_string());`
Fix #8898 2013-09-02 01:32:03 +00:00			`}`