Auto merge of #52018 - flip1995:rfc2103, r=oli-obk

Implementation of tool lints.

Tracking issue: #44690

2 files changed, 15 insertions, 0 deletions

diff --git a/src/libsyntax/attr/mod.rs b/src/libsyntax/attr/mod.rs
index 4e27d6c1525..d746ac3c577 100644
--- a/src/libsyntax/attr/mod.rs
+++ b/src/libsyntax/attr/mod.rs
@@ -90,6 +90,7 @@ pub fn is_known(attr: &Attribute) -> bool {
 }
 
 const RUST_KNOWN_TOOL: &[&str] = &["clippy", "rustfmt"];
+const RUST_KNOWN_LINT_TOOL: &[&str] = &["clippy"];
 
 pub fn is_known_tool(attr: &Attribute) -> bool {
     let tool_name =
@@ -97,6 +98,10 @@ pub fn is_known_tool(attr: &Attribute) -> bool {
     RUST_KNOWN_TOOL.contains(&tool_name.as_str().as_ref())
 }
 
+pub fn is_known_lint_tool(m_item: Ident) -> bool {
+    RUST_KNOWN_LINT_TOOL.contains(&m_item.as_str().as_ref())
+}
+
 impl NestedMetaItem {
     /// Returns the MetaItem if self is a NestedMetaItemKind::MetaItem.
     pub fn meta_item(&self) -> Option<&MetaItem> {
@@ -290,6 +295,14 @@ impl MetaItem {
     pub fn is_meta_item_list(&self) -> bool {
         self.meta_item_list().is_some()
     }
+
+    pub fn is_scoped(&self) -> Option<Ident> {
+        if self.ident.segments.len() > 1 {
+            Some(self.ident.segments[0].ident)
+        } else {
+            None
+        }
+    }
 }
 
 impl Attribute {
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 4c883253787..cbc421dbd32 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -458,6 +458,8 @@ declare_features! (
 
     // Scoped attributes
     (active, tool_attributes, "1.25.0", Some(44690), None),
+    // Scoped lints
+    (active, tool_lints, "1.28.0", Some(44690), None),
 
     // allow irrefutable patterns in if-let and while-let statements (RFC 2086)
     (active, irrefutable_let_patterns, "1.27.0", Some(44495), None),