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teach rustc about remove_stable_features and removed no-stack-chech feature. fixes #34915

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This commit is contained in:
Ben Schreiber 2017-02-25 21:42:22 -06:00
parent 1572bf104d
commit 98fd50a079
2 changed files with 40 additions and 7 deletions
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31
src/libsyntax/feature_gate.rs
View File

@ -77,12 +77,19 @@ macro_rules! declare_features {
};
($((removed, $feature: ident, $ver: expr, $issue: expr),)+) => {
/// Represents features which has since been removed (it was once Active)
/// Represents unstable features which have since been removed (it was once Active)
const REMOVED_FEATURES: &'static [(&'static str, &'static str, Option<u32>)] = &[
$((stringify!($feature), $ver, $issue)),+
];
};
($((stable_removed, $feature: ident, $ver: expr, $issue: expr),)+) => {
/// Represents stable features which have since been removed (it was once Accepted)
const STABLE_REMOVED_FEATURES: &'static [(&'static str, &'static str, Option<u32>)] = &[
$((stringify!($feature), $ver, $issue)),+
];
};
($((accepted, $feature: ident, $ver: expr, $issue: expr),)+) => {
/// Those language feature has since been Accepted (it was once Active)
const ACCEPTED_FEATURES: &'static [(&'static str, &'static str, Option<u32>)] = &[
@ -349,6 +356,11 @@ declare_features! (
// rustc internal
(removed, unmarked_api, "1.0.0", None),
(removed, pushpop_unsafe, "1.2.0", None),
//(removed, no_stack_check, "1.0.0", None),
);
declare_features! (
(stable_removed, no_stack_check, "1.0.0", None),
);
declare_features! (
@ -505,9 +517,6 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG
not yet settled",
cfg_fn!(structural_match))),
// Not used any more, but we can't feature gate it
("no_stack_check", Normal, Ungated),
("plugin", CrateLevel, Gated(Stability::Unstable,
"plugin",
"compiler plugins are experimental \
@ -909,8 +918,10 @@ fn find_lang_feature_issue(feature: &str) -> Option<u32> {
// assert!(issue.is_some())
issue
} else {
// search in Accepted or Removed features
match ACCEPTED_FEATURES.iter().chain(REMOVED_FEATURES).find(|t| t.0 == feature) {
// search in Accepted, Removed, or Stable Removed features
let found = ACCEPTED_FEATURES.iter().chain(REMOVED_FEATURES).chain(STABLE_REMOVED_FEATURES)
.find(|t| t.0 == feature);
match found {
Some(&(_, _, issue)) => issue,
None => panic!("Feature `{}` is not declared anywhere", feature),
}
@ -1444,9 +1455,15 @@ pub fn get_features(span_handler: &Handler, krate_attrs: &[ast::Attribute]) -> F
feature_checker.collect(&features, mi.span);
}
else if let Some(&(_, _, _)) = REMOVED_FEATURES.iter()
.find(|& &(n, _, _)| name == n) {
.find(|& &(n, _, _)| name == n)
.or_else(|| STABLE_REMOVED_FEATURES.iter()
.find(|& &(n, _, _)| name == n)) {
span_err!(span_handler, mi.span, E0557, "feature has been removed");
}
//else if let Some(&(_, _, _)) = STABLE_REMOVED_FEATURES.iter()
// .find(|& &(n, _, _)| name == n) {
// span_err!(span_handler, mi.span, E0557, "feature has been removed");
//}
else if let Some(&(_, _, _)) = ACCEPTED_FEATURES.iter()
.find(|& &(n, _, _)| name == n) {
features.declared_stable_lang_features.push((name, mi.span));

16
src/test/compile-fail/deprecated_no_stack_check.rs Normal file
View File

@ -0,0 +1,16 @@
// Copyright 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.
#![deny(warnings)]
#![feature(no_stack_check)]
//~^ ERROR: 12:12: 12:26: feature has been removed [E0557]
fn main() {
}