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simplify maybe_stage_features

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This commit is contained in:
Mazdak Farrokhzad 2019-10-08 10:46:41 +02:00
parent 1721c9685b
commit 477a68b720
1 changed files with 8 additions and 14 deletions
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22
src/libsyntax/feature_gate/check.rs
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@ -855,25 +855,19 @@ impl UnstableFeatures {
pub fn is_nightly_build(&self) -> bool {
match *self {
UnstableFeatures::Allow | UnstableFeatures::Cheat => true,
_ => false,
UnstableFeatures::Disallow => false,
}
}
}
fn maybe_stage_features(span_handler: &Handler, krate: &ast::Crate, unstable: UnstableFeatures) {
let allow_features = match unstable {
UnstableFeatures::Allow => true,
UnstableFeatures::Disallow => false,
UnstableFeatures::Cheat => true
};
if !allow_features {
for attr in &krate.attrs {
if attr.check_name(sym::feature) {
let release_channel = option_env!("CFG_RELEASE_CHANNEL").unwrap_or("(unknown)");
span_err!(span_handler, attr.span, E0554,
"`#![feature]` may not be used on the {} release channel",
release_channel);
}
if !unstable.is_nightly_build() {
for attr in krate.attrs.iter().filter(|attr| attr.check_name(sym::feature)) {
span_err!(
span_handler, attr.span, E0554,
"`#![feature]` may not be used on the {} release channel",
option_env!("CFG_RELEASE_CHANNEL").unwrap_or("(unknown)")
);
}
}
}