c27133e2ce
This partially implements the feature staging described in the [release channel RFC][rc]. It does not yet fully conform to the RFC as written, but does accomplish its goals sufficiently for the 1.0 alpha release. It has three primary user-visible effects: * On the nightly channel, use of unstable APIs generates a warning. * On the beta channel, use of unstable APIs generates a warning. * On the beta channel, use of feature gates generates a warning. Code that does not trigger these warnings is considered 'stable', modulo pre-1.0 bugs. Disabling the warnings for unstable APIs continues to be done in the existing (i.e. old) style, via `#[allow(...)]`, not that specified in the RFC. I deem this marginally acceptable since any code that must do this is not using the stable dialect of Rust. Use of feature gates is itself gated with the new 'unstable_features' lint, on nightly set to 'allow', and on beta 'warn'. The attribute scheme used here corresponds to an older version of the RFC, with the `#[staged_api]` crate attribute toggling the staging behavior of the stability attributes, but the user impact is only in-tree so I'm not concerned about having to make design changes later (and I may ultimately prefer the scheme here after all, with the `#[staged_api]` crate attribute). Since the Rust codebase itself makes use of unstable features the compiler and build system to a midly elaborate dance to allow it to bootstrap while disobeying these lints (which would otherwise be errors because Rust builds with `-D warnings`). This patch includes one significant hack that causes a regression. Because the `format_args!` macro emits calls to unstable APIs it would trigger the lint. I added a hack to the lint to make it not trigger, but this in turn causes arguments to `println!` not to be checked for feature gates. I don't presently understand macro expansion well enough to fix. This is bug #20661. Closes #16678 [rc]: https://github.com/rust-lang/rfcs/blob/master/text/0507-release-channels.md
51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
// Copyright 2012-2013 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.
|
|
|
|
//! Some stuff used by rustc that doesn't have many dependencies
|
|
//!
|
|
//! Originally extracted from rustc::back, which was nominally the
|
|
//! compiler 'backend', though LLVM is rustc's backend, so rustc_back
|
|
//! is really just odds-and-ends relating to code gen and linking.
|
|
//! This crate mostly exists to make rustc smaller, so we might put
|
|
//! more 'stuff' here in the future. It does not have a dependency on
|
|
//! rustc_llvm.
|
|
//!
|
|
//! FIXME: Split this into two crates: one that has deps on syntax, and
|
|
//! one that doesn't; the one that doesn't might get decent parallel
|
|
//! build speedups.
|
|
|
|
#![crate_name = "rustc_back"]
|
|
#![experimental]
|
|
#![staged_api]
|
|
#![crate_type = "dylib"]
|
|
#![crate_type = "rlib"]
|
|
#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
|
|
html_favicon_url = "http://www.rust-lang.org/favicon.ico",
|
|
html_root_url = "http://doc.rust-lang.org/nightly/")]
|
|
#![feature(slicing_syntax)]
|
|
|
|
extern crate syntax;
|
|
extern crate serialize;
|
|
#[macro_use] extern crate log;
|
|
|
|
pub mod abi;
|
|
pub mod archive;
|
|
pub mod arm;
|
|
pub mod fs;
|
|
pub mod mips;
|
|
pub mod mipsel;
|
|
pub mod rpath;
|
|
pub mod sha2;
|
|
pub mod svh;
|
|
pub mod target_strs;
|
|
pub mod x86;
|
|
pub mod x86_64;
|
|
pub mod target;
|