port `#[move_size_limit]` to the new attribute parsing infrastructure

2 files changed, 28 insertions, 1 deletions

diff --git a/compiler/rustc_attr_parsing/src/attributes/crate_level.rs b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
index e3654d49580..af19b9f552d 100644
--- a/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
+++ b/compiler/rustc_attr_parsing/src/attributes/crate_level.rs
@@ -94,3 +94,29 @@ impl<S: Stage> SingleAttributeParser<S> for RecursionLimitParser {
         })
     }
 }
+
+pub(crate) struct MoveSizeLimitParser;
+
+impl<S: Stage> SingleAttributeParser<S> for MoveSizeLimitParser {
+    const PATH: &[Symbol] = &[sym::move_size_limit];
+    const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepOutermost;
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Error;
+    const TEMPLATE: AttributeTemplate = template!(NameValueStr: "N");
+
+    // FIXME: move size limit is allowed on all targets and ignored,
+    //        even though it should only be valid on crates of course
+    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(&[Allow(Target::Crate)]);
+
+    fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
+        let ArgParser::NameValue(nv) = args else {
+            cx.expected_name_value(cx.attr_span, None);
+            return None;
+        };
+
+        Some(AttributeKind::MoveSizeLimit {
+            limit: cx.parse_limit_int(nv)?,
+            attr_span: cx.attr_span,
+            limit_span: nv.value_span,
+        })
+    }
+}
diff --git a/compiler/rustc_attr_parsing/src/context.rs b/compiler/rustc_attr_parsing/src/context.rs
index 5700668145b..4ec9df88e82 100644
--- a/compiler/rustc_attr_parsing/src/context.rs
+++ b/compiler/rustc_attr_parsing/src/context.rs
@@ -24,7 +24,7 @@ use crate::attributes::codegen_attrs::{
     UsedParser,
 };
 use crate::attributes::confusables::ConfusablesParser;
-use crate::attributes::crate_level::{CrateNameParser, RecursionLimitParser};
+use crate::attributes::crate_level::{CrateNameParser, MoveSizeLimitParser, RecursionLimitParser};
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::dummy::DummyParser;
 use crate::attributes::inline::{InlineParser, RustcForceInlineParser};
@@ -181,6 +181,7 @@ attribute_parsers!(
         Single<LinkOrdinalParser>,
         Single<LinkSectionParser>,
         Single<LinkageParser>,
+        Single<MoveSizeLimitParser>,
         Single<MustUseParser>,
         Single<OptimizeParser>,
         Single<PathAttributeParser>,