Move deprecation_in_effect to inherent method on Deprecation

compiler/rustc_attr/src/builtin.rs

@@ -744,6 +744,22 @@ pub enum DeprecatedSince {
     Symbol(Symbol),
 }
 
+impl Deprecation {
+    /// Whether an item marked with #[deprecated(since = "X")] is currently
+    /// deprecated (i.e., whether X is not greater than the current rustc
+    /// version).
+    pub fn is_in_effect(&self) -> bool {
+        match self.since {
+            Some(DeprecatedSince::RustcVersion(since)) => since <= RustcVersion::CURRENT,
+            Some(DeprecatedSince::Future) => false,
+            // The `since` field doesn't have semantic purpose without `#![staged_api]`.
+            Some(DeprecatedSince::Symbol(_)) => true,
+            // Assume deprecation is in effect if "since" field is missing.
+            None => true,
+        }
+    }
+}
+
 impl Display for DeprecatedSince {
     fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {

compiler/rustc_middle/src/middle/stability.rs

@@ -18,7 +18,7 @@ use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_session::lint::builtin::{DEPRECATED, DEPRECATED_IN_FUTURE, SOFT_UNSTABLE};
 use rustc_session::lint::{BuiltinLintDiagnostics, Level, Lint, LintBuffer};
 use rustc_session::parse::feature_err_issue;
-use rustc_session::{RustcVersion, Session};
+use rustc_session::Session;
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::Span;
 use std::num::NonZeroU32;
@@ -125,19 +125,6 @@ pub fn report_unstable(
     }
 }
 
-/// Checks whether an item marked with `deprecated(since="X")` is currently
-/// deprecated (i.e., whether X is not greater than the current rustc version).
-pub fn deprecation_in_effect(depr: &Deprecation) -> bool {
-    match depr.since {
-        Some(DeprecatedSince::RustcVersion(since)) => since <= RustcVersion::CURRENT,
-        Some(DeprecatedSince::Future) => false,
-        // The `since` field doesn't have semantic purpose without `#![staged_api]`.
-        Some(DeprecatedSince::Symbol(_)) => true,
-        // Assume deprecation is in effect if "since" field is missing.
-        None => true,
-    }
-}
-
 pub fn deprecation_suggestion(
     diag: &mut Diagnostic,
     kind: &str,
@@ -191,7 +178,7 @@ pub fn deprecation_message_and_lint(
     kind: &str,
     path: &str,
 ) -> (String, &'static Lint) {
-    let is_in_effect = deprecation_in_effect(depr);
+    let is_in_effect = depr.is_in_effect();
     (
         deprecation_message(is_in_effect, depr.since, depr.note, kind, path),
         deprecation_lint(is_in_effect),
@@ -363,7 +350,7 @@ impl<'tcx> TyCtxt<'tcx> {
                     // Calculating message for lint involves calling `self.def_path_str`.
                     // Which by default to calculate visible path will invoke expensive `visible_parent_map` query.
                     // So we skip message calculation altogether, if lint is allowed.
-                    let is_in_effect = deprecation_in_effect(depr_attr);
+                    let is_in_effect = depr_attr.is_in_effect();
                     let lint = deprecation_lint(is_in_effect);
                     if self.lint_level_at_node(lint, id).0 != Level::Allow {
                         let def_path = with_no_trimmed_paths!(self.def_path_str(def_id));

src/librustdoc/html/render/mod.rs

@@ -53,7 +53,6 @@ use rustc_data_structures::captures::Captures;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_hir::def_id::{DefId, DefIdSet};
 use rustc_hir::Mutability;
-use rustc_middle::middle::stability;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_session::RustcVersion;
 use rustc_span::{
@@ -621,7 +620,7 @@ fn short_item_info(
         // We display deprecation messages for #[deprecated], but only display
         // the future-deprecation messages for rustc versions.
         let mut message = if let Some(since) = since {
-            if !stability::deprecation_in_effect(&depr) {
+            if !depr.is_in_effect() {
                 if let DeprecatedSince::Future = since {
                     String::from("Deprecating in a future Rust version")
                 } else {

src/librustdoc/html/render/print_item.rs

@@ -6,7 +6,6 @@ use rustc_hir as hir;
 use rustc_hir::def::CtorKind;
 use rustc_hir::def_id::DefId;
 use rustc_index::IndexVec;
-use rustc_middle::middle::stability;
 use rustc_middle::query::Key;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::hygiene::MacroKind;
@@ -591,11 +590,7 @@ fn extra_info_tags<'a, 'tcx: 'a>(
 
         // The trailing space after each tag is to space it properly against the rest of the docs.
         if let Some(depr) = &item.deprecation(tcx) {
-            let message = if stability::deprecation_in_effect(depr) {
+            let message = if depr.is_in_effect() { "Deprecated" } else { "Deprecation planned" };
-                "Deprecated"
-            } else {
-                "Deprecation planned"
-            };
             write!(f, "{}", tag_html("deprecated", "", message))?;
         }