2014-07-04 21:41:54 -05:00
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// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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2014-07-06 23:58:30 -05:00
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//! Some stuff used by rustc that doesn't have many dependencies
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//!
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//! Originally extracted from rustc::back, which was nominally the
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//! compiler 'backend', though LLVM is rustc's backend, so rustc_back
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//! is really just odds-and-ends relating to code gen and linking.
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//! This crate mostly exists to make rustc smaller, so we might put
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//! more 'stuff' here in the future. It does not have a dependency on
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//! rustc_llvm.
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//!
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//! FIXME: Split this into two crates: one that has deps on syntax, and
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//! one that doesn't; the one that doesn't might get decent parallel
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//! build speedups.
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2014-07-04 21:41:54 -05:00
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#![crate_name = "rustc_back"]
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#![experimental]
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#![crate_type = "dylib"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
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html_favicon_url = "http://www.rust-lang.org/favicon.ico",
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2014-10-09 12:47:22 -05:00
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html_root_url = "http://doc.rust-lang.org/nightly/")]
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2014-07-04 21:41:54 -05:00
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2014-09-26 00:48:16 -05:00
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#![allow(unknown_features)]
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#![feature(globs, phase, macro_rules, slicing_syntax)]
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2014-12-08 17:35:22 -06:00
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#![feature(unboxed_closures)]
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Fix orphan checking (cc #19470). (This is not a complete fix of #19470 because of the backwards compatibility feature gate.)
This is a [breaking-change]. The new rules require that, for an impl of a trait defined
in some other crate, two conditions must hold:
1. Some type must be local.
2. Every type parameter must appear "under" some local type.
Here are some examples that are legal:
```rust
struct MyStruct<T> { ... }
// Here `T` appears "under' `MyStruct`.
impl<T> Clone for MyStruct<T> { }
// Here `T` appears "under' `MyStruct` as well. Note that it also appears
// elsewhere.
impl<T> Iterator<T> for MyStruct<T> { }
```
Here is an illegal example:
```rust
// Here `U` does not appear "under" `MyStruct` or any other local type.
// We call `U` "uncovered".
impl<T,U> Iterator<U> for MyStruct<T> { }
```
There are a couple of ways to rewrite this last example so that it is
legal:
1. In some cases, the uncovered type parameter (here, `U`) should be converted
into an associated type. This is however a non-local change that requires access
to the original trait. Also, associated types are not fully baked.
2. Add `U` as a type parameter of `MyStruct`:
```rust
struct MyStruct<T,U> { ... }
impl<T,U> Iterator<U> for MyStruct<T,U> { }
```
3. Create a newtype wrapper for `U`
```rust
impl<T,U> Iterator<Wrapper<U>> for MyStruct<T,U> { }
```
Because associated types are not fully baked, which in the case of the
`Hash` trait makes adhering to this rule impossible, you can
temporarily disable this rule in your crate by using
`#![feature(old_orphan_check)]`. Note that the `old_orphan_check`
feature will be removed before 1.0 is released.
2014-12-26 02:30:51 -06:00
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#![feature(old_orphan_check)]
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2014-07-04 21:41:54 -05:00
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#[phase(plugin, link)]
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extern crate log;
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extern crate syntax;
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2014-07-07 00:21:04 -05:00
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extern crate serialize;
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2014-07-04 21:41:54 -05:00
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pub mod abi;
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2014-07-06 23:50:37 -05:00
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pub mod archive;
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2014-07-04 21:41:54 -05:00
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pub mod arm;
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2014-07-07 00:13:55 -05:00
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pub mod fs;
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2014-07-04 21:41:54 -05:00
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pub mod mips;
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pub mod mipsel;
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2014-07-06 20:01:16 -05:00
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pub mod rpath;
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2014-07-07 00:21:04 -05:00
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pub mod sha2;
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2014-07-04 21:41:54 -05:00
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pub mod svh;
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pub mod target_strs;
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pub mod x86;
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pub mod x86_64;
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2014-07-23 13:56:36 -05:00
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pub mod target;
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