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This does a number of things, but especially dramatically reduce the number of allocations performed for operations involving attributes/ meta items: - Converts ast::meta_item & ast::attribute and other associated enums to CamelCase. - Converts several standalone functions in syntax::attr into methods, defined on two traits AttrMetaMethods & AttributeMethods. The former is common to both MetaItem and Attribute since the latter is a thin wrapper around the former. - Deletes functions that are unnecessary due to iterators. - Converts other standalone functions to use iterators and the generic AttrMetaMethods rather than allocating a lot of new vectors (e.g. the old code would have to allocate a new vector to use functions that operated on &[meta_item] on &[attribute].) - Moves the core algorithm of the #[cfg] matching to syntax::attr, similar to find_inline_attr and find_linkage_metas. This doesn't have much of an effect on the speed of #[cfg] stripping, despite hugely reducing the number of allocations performed; presumably most of the time is spent in the ast folder rather than doing attribute checks. Also fixes the Eq instance of MetaItem_ to correctly ignore spans, so that `rustc --cfg 'foo(bar)'` now works.
The Rust Programming Language
This is a compiler for Rust, including standard libraries, tools and documentation.
Quick Start
Windows
Note: Windows users should read the detailed getting started notes on the wiki. Even when using the binary installer the Windows build requires a MinGW installation, the precise details of which are not discussed here.
Linux / OS X
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Install the prerequisites (if not already installed)
- g++ 4.4 or clang++ 3.x
- python 2.6 or later (but not 3.x)
- perl 5.0 or later
- gnu make 3.81 or later
- curl
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Download and build Rust You can either download a tarball or build directly from the repo.
To build from the tarball do:
$ curl -O http://static.rust-lang.org/dist/rust-0.7.tar.gz $ tar -xzf rust-0.7.tar.gz $ cd rust-0.7Or to build from the repo do:
$ git clone https://github.com/mozilla/rust.git $ cd rustNow that you have Rust's source code, you can configure and build it:
$ ./configure $ make && make installYou may need to use
sudo make installif you do not normally have permission to modify the destination directory. The install locations can be adjusted by passing a--prefixargument toconfigure. Various other options are also supported, pass--helpfor more information on them.When complete,
make installwill place several programs into/usr/local/bin:rustc, the Rust compiler;rustdoc, the API-documentation tool, andrustpkg, the Rust package manager and build system. -
Read the tutorial.
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Enjoy!
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, Server 2008 R2), x86 only
- Linux (various distributions), x86 and x86-64
- OSX 10.6 ("Snow Leopard") or greater, x86 and x86-64
You may find that other platforms work, but these are our "tier 1" supported build environments that are most likely to work.
Rust currently needs about 1.8G of RAM to build without swapping; if it hits swap, it will take a very long time to build.
There is lots more documentation in the wiki.
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.
See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.