implement inline parser

compiler/rustc_attr_parsing/src/attributes/inline.rs

@@ -63,7 +63,7 @@ impl<S: Stage> SingleAttributeParser<S> for RustcForceInlineParser {
     const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
     const TEMPLATE: AttributeTemplate = template!(Word, List: "reason", NameValueStr: "reason");
 
-    fn convert(cx: &AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
+    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
         let reason = match args {
             ArgParser::NoArgs => None,
             ArgParser::List(list) => {

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -29,6 +29,7 @@ pub(crate) mod allow_unstable;
 pub(crate) mod cfg;
 pub(crate) mod confusables;
 pub(crate) mod deprecation;
+pub(crate) mod inline;
 pub(crate) mod lint_helpers;
 pub(crate) mod repr;
 pub(crate) mod stability;

compiler/rustc_attr_parsing/src/context.rs

@@ -18,6 +18,7 @@ use rustc_span::{DUMMY_SP, ErrorGuaranteed, Span, Symbol, sym};
 use crate::attributes::allow_unstable::{AllowConstFnUnstableParser, AllowInternalUnstableParser};
 use crate::attributes::confusables::ConfusablesParser;
 use crate::attributes::deprecation::DeprecationParser;
+use crate::attributes::inline::InlineParser;
 use crate::attributes::lint_helpers::AsPtrParser;
 use crate::attributes::repr::ReprParser;
 use crate::attributes::stability::{
@@ -106,6 +107,7 @@ attribute_parsers!(
         Single<AsPtrParser>,
         Single<ConstStabilityIndirectParser>,
         Single<DeprecationParser>,
+        Single<InlineParser>,
         Single<TransparencyParser>,
         // tidy-alphabetical-end
     ];