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Huon Wilson e81ae40770 Try to only suggest implementable traits for method calls. That is, when offering suggestions for unresolved method calls, avoid suggesting traits for which implementing the trait for the receiver type either makes little sense (e.g. type errors, or sugared unboxed closures), or violates coherence. The latter is approximated by ensuring that at least one of `{receiver type, trait}` is local. This isn't precisely correct due to multidispatch, but the error messages one encounters in such situation are useless more often than not; it is better to be conservative and miss some cases, than have overly many false positives (e.g. writing `some_slice.map(\|x\| ...)` uselessly suggested that one should implement `IteratorExt` for `&[T]`, while the correct fix is to call `.iter()`). Closes #21420.		2015-02-03 22:33:54 +11:00
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README.md

The Rust Programming Language

This is a compiler for Rust, including standard libraries, tools and documentation.

Quick Start

Download a binary installer for your platform.
Read The Rust Programming Language.
Enjoy!

Note: Windows users can read the detailed using Rust on Windows notes on the wiki.

Building from Source

Make sure you have installed the dependencies:
- g++ 4.7 or clang++ 3.x
- python 2.6 or later (but not 3.x)
- GNU make 3.81 or later
- curl
- git
Download and build Rust:

You can either download a tarball or build directly from the repo.

To build from the tarball do:
```
 $ curl -O https://static.rust-lang.org/dist/rustc-nightly-src.tar.gz
 $ tar -xzf rustc-nightly-src.tar.gz
 $ cd rustc-nightly
```
Or to build from the repo do:
```
 $ git clone https://github.com/rust-lang/rust.git
 $ cd rust
```
Now that you have Rust's source code, you can configure and build it:
```
 $ ./configure
 $ make && make install
```
Note: You may need to use sudo make install if you do not normally have permission to modify the destination directory. The install locations can be adjusted by passing a --prefix argument to configure. Various other options are also supported, pass --help for more information on them.

When complete, make install will place several programs into /usr/local/bin: rustc, the Rust compiler, and rustdoc, the API-documentation tool.
Read The Rust Programming Language.
Enjoy!

Building on Windows

To easily build on windows we can use MSYS2:

Grab the latest MSYS2 installer and go through the installer.
Now from the MSYS2 terminal we want to install the mingw64 toolchain and the other tools we need.

# choose one based on platform
$ pacman -S mingw-w64-i686-toolchain
$ pacman -S mingw-w64-x86_64-toolchain

$ pacman -S base-devel

With that now start mingw32_shell.bat or mingw64_shell.bat from where you installed MSYS2 (i.e. C:\msys). Which one you choose depends on if you want 32 or 64 bit Rust.
From there just navigate to where you have Rust's source code, configure and build it:
```
 $ ./configure
 $ make && make install
```

Notes

Since the Rust compiler is written in Rust, it must be built by a precompiled "snapshot" version of itself (made in an earlier state of development). As such, source builds require a connection to the Internet, to fetch snapshots, and an OS that can execute the available snapshot binaries.

Snapshot binaries are currently built and tested on several platforms:

Windows (7, 8, Server 2008 R2), x86 and x86-64 (64-bit support added in Rust 0.12.0)
Linux (2.6.18 or later, various distributions), x86 and x86-64
OSX 10.7 (Lion) or greater, x86 and x86-64

You may find that other platforms work, but these are our officially supported build environments that are most likely to work.

Rust currently needs about 1.5 GiB of RAM to build without swapping; if it hits swap, it will take a very long time to build.

There is a lot more documentation in the wiki.

Getting help and getting involved

The Rust community congregates in a few places:

StackOverflow - Get help here.
/r/rust - General discussion.
internals.rust-lang.org - For development of the Rust language itself.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.