std: Rename Show/String to Debug/Display #21457
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r? @brson (rust_highfive has picked a reviewer for you, use r? to override) |
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r? @aturon |
alexcrichton
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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 rust-lang#21436
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Nicely done, @alexcrichton! |
This was referenced Jan 21, 2015
alexcrichton
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Conflicts: src/liballoc/boxed.rs src/librustc/middle/traits/error_reporting.rs src/libstd/sync/mpsc/mod.rs
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This seems to have broken make check-stage1: src/compiletest/common.rs:16:28: 16:33 error: unknown |
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This commit replaces usage of the Show and fmt::String traits with the Debug and Display traits. This was required to fix breaking changes introduced by rust-lang/rust#21457. Additionally, the superfluous `detail` method on `docopt::Error` was removed as it no longer exists in the trait. Also, hi!
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This commit is an implementation of RFC 565 which is a stabilization of
the
std::fmtmodule and the implementations of various formatting traits.Specifically, the following changes were performed:
Showtrait is now deprecated, it was renamed toDebugStringtrait is now deprecated, it was renamed toDisplayDebugandDisplayimplementations were audited in accordance with theRFC and audited implementations now have the
#[stable]attributeDebugare now quoted and escape charactersunwrapmethods onResultnow requireDisplayinstead ofDebugErrortrait no longer has adetailmethod and now requires thatDisplaymust be implemented. With the loss ofString, this has moved intolibcore.
impl<E: Error> FromError<E> for Box<Error>now existsderive(Show)has been renamed toderive(Debug). This is not currentlywarned about due to warnings being emitted on stage1+
While backwards compatibility is attempted to be maintained with a blanket
implementation of
Displayfor the oldStringtrait (and the same forShow/Debug) this is still a breaking change due to primitives no longerimplementing
Stringas well as modifications such asunwrapand theErrortrait. Most code is fairly straightforward to update with a rename or tweaks of
method calls.
[breaking-change]
Closes #21436