Module nightly_options 

Re-exports

use rustc_feature::UnstableFeatures; 🔒

use super::OptionStability; 🔒

use super::RustcOptGroup; 🔒

use crate::EarlyDiagCtxt; 🔒

Functions

check_nightly_options

match_is_nightly_build

unstable_options_enabled

Are we allowed to use -Z compiler flags and -Zunstable-options was passed?