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std: Rename Show/String to Debug/Display

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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 #21436
This commit is contained in:
Alex Crichton 2015-01-20 15:45:07 -08:00
parent 29bd9a06ef
commit 3cb9fa26ef
136 changed files with 763 additions and 706 deletions
Download patch file Download diff file Expand all files Collapse all files

12
src/compiletest/common.rs
View file

@ -13,7 +13,7 @@ use std::fmt;
use std::str::FromStr;
use regex::Regex;
#[derive(Clone, PartialEq)]
#[derive(Clone, PartialEq, Debug)]
pub enum Mode {
CompileFail,
RunFail,
@ -43,9 +43,9 @@ impl FromStr for Mode {
}
}
impl fmt::String for Mode {
impl fmt::Display for Mode {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::String::fmt(match *self {
fmt::Display::fmt(match *self {
CompileFail => "compile-fail",
RunFail => "run-fail",
RunPass => "run-pass",
@ -58,12 +58,6 @@ impl fmt::String for Mode {
}
}
impl fmt::Show for Mode {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::String::fmt(self, f)
}
}
#[derive(Clone)]
pub struct Config {
// The library paths required for running the compiler

6
src/compiletest/runtest.rs
View file

@ -547,7 +547,7 @@ fn run_debuginfo_gdb_test(config: &Config, props: &TestProps, testfile: &Path) {
// Add line breakpoints
for line in breakpoint_lines.iter() {
script_str.push_str(&format!("break '{:?}':{}\n",
script_str.push_str(&format!("break '{}':{}\n",
testfile.filename_display(),
*line)[]);
}
@ -750,7 +750,7 @@ fn run_debuginfo_lldb_test(config: &Config, props: &TestProps, testfile: &Path)
status: status,
stdout: out,
stderr: err,
cmdline: format!("{}", cmd)
cmdline: format!("{:?}", cmd)
};
}
}
@ -953,7 +953,7 @@ fn check_expected_errors(expected_errors: Vec<errors::ExpectedError> ,
}
let prefixes = expected_errors.iter().map(|ee| {
format!("{:?}:{}:", testfile.display(), ee.line)
format!("{}:{}:", testfile.display(), ee.line)
}).collect::<Vec<String> >();
#[cfg(windows)]