nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-12-08 22:53:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

unstable_features without CFG_RELEASE_CHANNEL

Browse Source 
Per discussion in #2228

https://github.com/rust-lang-nursery/rustfmt/pull/2228#issuecomment-348893294
https://github.com/rust-lang-nursery/rustfmt/pull/2228#issuecomment-349799548

Inline comment should explain the reasoning.
This commit is contained in:
Christopher Durham 2017-12-06 18:07:19 -05:00
parent 97fd517593
commit 7e2c3cb857
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/config.rs
View File

@ -21,11 +21,21 @@ use file_lines::FileLines;
use lists::{ListTactic, SeparatorPlace, SeparatorTactic};
use Summary;
/// Check if we're in a nightly build.
///
/// The environment variable `CFG_RELEASE_CHANNEL` is set during the rustc bootstrap
/// to "stable", "beta", or "nightly" depending on what toolchain is being built.
/// If we are being built as part of the stable or beta toolchains, we want
/// to disable unstable configuration options.
///
/// If we're being built by cargo (e.g. `cargo +nightly install rustfmt-nightly`),
/// `CFG_RELEASE_CHANNEL` is not set. As we only support being built against the
/// nightly compiler when installed from crates.io, default to nightly mode.
macro_rules! is_nightly_channel {
() => {
option_env!("CFG_RELEASE_CHANNEL")
.map(|c| c == "nightly")
.unwrap_or(false)
.unwrap_or(true)
}
}