2015-02-05 18:14:42 -06:00
|
|
|
#![feature(no_std)]
|
2014-07-22 18:39:10 -05:00
|
|
|
#![no_std]
|
2014-08-12 22:31:30 -05:00
|
|
|
#[prelude_import]
|
2014-12-22 11:04:23 -06:00
|
|
|
use std::prelude::v1::*;
|
2014-12-26 15:36:21 -06:00
|
|
|
#[macro_use]
|
|
|
|
extern crate "std" as std;
|
2014-07-22 18:39:10 -05:00
|
|
|
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
|
|
|
|
// file at the top-level directory of this distribution and at
|
|
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
|
|
//
|
|
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
|
|
// option. This file may not be copied, modified, or distributed
|
|
|
|
// except according to those terms.
|
|
|
|
|
|
|
|
// pretty-compare-only
|
|
|
|
// pretty-mode:typed
|
|
|
|
// pp-exact:issue-4264.pp
|
|
|
|
|
|
|
|
// #4264 fixed-length vector types
|
|
|
|
|
2015-01-31 10:23:42 -06:00
|
|
|
pub fn foo(_: [i32; (3 as usize)]) { }
|
2014-07-22 18:39:10 -05:00
|
|
|
|
|
|
|
pub fn bar() {
|
2015-02-18 08:05:34 -06:00
|
|
|
const FOO: usize = ((5 as usize) - (4 as usize) as usize);
|
2014-12-05 20:12:25 -06:00
|
|
|
let _: [(); (FOO as usize)] = ([(() as ())] as [(); 1]);
|
2014-07-22 18:39:10 -05:00
|
|
|
|
2015-03-03 02:42:26 -06:00
|
|
|
let _: [(); (1 as usize)] = ([(() as ())] as [(); 1]);
|
2014-07-22 18:39:10 -05:00
|
|
|
|
|
|
|
let _ =
|
2015-01-31 10:23:42 -06:00
|
|
|
(((&((([(1 as i32), (2 as i32), (3 as i32)] as [i32; 3])) as [i32; 3])
|
|
|
|
as &[i32; 3]) as *const _ as *const [i32; 3]) as
|
2015-03-03 02:42:26 -06:00
|
|
|
*const [i32; (3 as usize)] as *const [i32; 3]);
|
2014-10-03 10:00:27 -05:00
|
|
|
|
2014-07-22 18:39:10 -05:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2014-12-27 15:57:43 -06:00
|
|
|
((::std::fmt::format as
|
2014-09-07 16:57:26 -05:00
|
|
|
fn(core::fmt::Arguments<'_>) -> collections::string::String {collections::fmt::format})(((::std::fmt::Arguments::new_v1
|
|
|
|
as
|
|
|
|
fn(&[&str], &[core::fmt::ArgumentV1<'_>]) -> core::fmt::Arguments<'_> {core::fmt::Arguments<'a>::new_v1})(({
|
|
|
|
static __STATIC_FMTSTR:
|
|
|
|
&'static [&'static str]
|
|
|
|
=
|
|
|
|
(&([("test"
|
|
|
|
as
|
|
|
|
&'static str)]
|
|
|
|
as
|
|
|
|
[&'static str; 1])
|
|
|
|
as
|
|
|
|
&'static [&'static str; 1]);
|
|
|
|
(__STATIC_FMTSTR
|
std: Stabilize the std::fmt module
This commit performs a final stabilization pass over the std::fmt module,
marking all necessary APIs as stable. One of the more interesting aspects of
this module is that it exposes a good deal of its runtime representation to the
outside world in order for `format_args!` to be able to construct the format
strings. Instead of hacking the compiler to assume that these items are stable,
this commit instead lays out a story for the stabilization and evolution of
these APIs.
There are three primary details used by the `format_args!` macro:
1. `Arguments` - an opaque package of a "compiled format string". This structure
is passed around and the `write` function is the source of truth for
transforming a compiled format string into a string at runtime. This must be
able to be constructed in stable code.
2. `Argument` - an opaque structure representing an argument to a format string.
This is *almost* a trait object as it's just a pointer/function pair, but due
to the function originating from one of many traits, it's not actually a
trait object. Like `Arguments`, this must be constructed from stable code.
3. `fmt::rt` - this module contains the runtime type definitions primarily for
the `rt::Argument` structure. Whenever an argument is formatted with
nonstandard flags, a corresponding `rt::Argument` is generated describing how
the argument is being formatted. This can be used to construct an
`Arguments`.
The primary interface to `std::fmt` is the `Arguments` structure, and as such
this type name is stabilize as-is today. It is expected for libraries to pass
around an `Arguments` structure to represent a pending formatted computation.
The remaining portions are largely "cruft" which would rather not be stabilized,
but due to the stability checks they must be. As a result, almost all pieces
have been renamed to represent that they are "version 1" of the formatting
representation. The theory is that at a later date if we change the
representation of these types we can add new definitions called "version 2" and
corresponding constructors for `Arguments`.
One of the other remaining large questions about the fmt module were how the
pending I/O reform would affect the signatures of methods in the module. Due to
[RFC 526][rfc], however, the writers of fmt are now incompatible with the
writers of io, so this question has largely been solved. As a result the
interfaces are largely stabilized as-is today.
[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/0526-fmt-text-writer.md
Specifically, the following changes were made:
* The contents of `fmt::rt` were all moved under `fmt::rt::v1`
* `fmt::rt` is stable
* `fmt::rt::v1` is stable
* `Error` is stable
* `Writer` is stable
* `Writer::write_str` is stable
* `Writer::write_fmt` is stable
* `Formatter` is stable
* `Argument` has been renamed to `ArgumentV1` and is stable
* `ArgumentV1::new` is stable
* `ArgumentV1::from_uint` is stable
* `Arguments::new_v1` is stable (renamed from `new`)
* `Arguments::new_v1_formatted` is stable (renamed from `with_placeholders`)
* All formatting traits are now stable, as well as the `fmt` method.
* `fmt::write` is stable
* `fmt::format` is stable
* `Formatter::pad_integral` is stable
* `Formatter::pad` is stable
* `Formatter::write_str` is stable
* `Formatter::write_fmt` is stable
* Some assorted top level items which were only used by `format_args!` were
removed in favor of static functions on `ArgumentV1` as well.
* The formatting-flag-accessing methods remain unstable
Within the contents of the `fmt::rt::v1` module, the following actions were
taken:
* Reexports of all enum variants were removed
* All prefixes on enum variants were removed
* A few miscellaneous enum variants were renamed
* Otherwise all structs, fields, and variants were marked stable.
In addition to these actions in the `std::fmt` module, many implementations of
`Show` and `String` were stabilized as well.
In some other modules:
* `ToString` is now stable
* `ToString::to_string` is now stable
* `Vec` no longer implements `fmt::Writer` (this has moved to `String`)
This is a breaking change due to all of the changes to the `fmt::rt` module, but
this likely will not have much impact on existing programs.
Closes #20661
[breaking-change]
2015-01-13 17:42:53 -06:00
|
|
|
as
|
2014-09-07 16:57:26 -05:00
|
|
|
&'static [&'static str])
|
|
|
|
}
|
|
|
|
as
|
|
|
|
&[&str]),
|
|
|
|
(&(match (()
|
|
|
|
as
|
|
|
|
())
|
|
|
|
{
|
|
|
|
()
|
|
|
|
=>
|
|
|
|
([]
|
|
|
|
as
|
|
|
|
[core::fmt::ArgumentV1<'_>; 0]),
|
|
|
|
}
|
|
|
|
as
|
|
|
|
[core::fmt::ArgumentV1<'_>; 0])
|
|
|
|
as
|
|
|
|
&[core::fmt::ArgumentV1<'_>; 0]))
|
|
|
|
as
|
|
|
|
core::fmt::Arguments<'_>))
|
2014-12-27 15:57:43 -06:00
|
|
|
as collections::string::String);
|
2014-07-22 18:39:10 -05:00
|
|
|
}
|
2015-02-18 08:05:34 -06:00
|
|
|
pub type Foo = [i32; (3 as usize)];
|
2014-07-22 18:39:10 -05:00
|
|
|
pub struct Bar {
|
2015-02-18 08:05:34 -06:00
|
|
|
pub x: [i32; (3 as usize)],
|
2014-07-22 18:39:10 -05:00
|
|
|
}
|
2015-02-17 08:47:49 -06:00
|
|
|
pub struct TupleBar([i32; (4 as usize)]);
|
|
|
|
pub enum Baz { BazVariant([i32; (5 as usize)]), }
|
2014-07-22 18:39:10 -05:00
|
|
|
pub fn id<T>(x: T) -> T { (x as T) }
|
|
|
|
pub fn use_id() {
|
|
|
|
let _ =
|
2015-02-18 08:05:34 -06:00
|
|
|
((id::<[i32; (3 as usize)]> as
|
2015-01-31 10:23:42 -06:00
|
|
|
fn([i32; 3]) -> [i32; 3] {id})(([(1 as i32), (2 as i32),
|
|
|
|
(3 as i32)] as [i32; 3])) as
|
|
|
|
[i32; 3]);
|
2014-07-22 18:39:10 -05:00
|
|
|
}
|
|
|
|
fn main() { }
|