Implement crate level only lints checking.

2 files changed, 12 insertions, 3 deletions

diff --git a/src/librustc_session/lint.rs b/src/librustc_session/lint.rs
index ffb45793090..0dcbee08abe 100644
--- a/src/librustc_session/lint.rs
+++ b/src/librustc_session/lint.rs
@@ -88,6 +88,8 @@ pub struct Lint {
 
     /// `Some` if this lint is feature gated, otherwise `None`.
     pub feature_gate: Option<Symbol>,
+
+    pub crate_level_only: bool,
 }
 
 /// Extra information for a future incompatibility lint.
@@ -111,6 +113,7 @@ impl Lint {
             report_in_external_macro: false,
             future_incompatible: None,
             feature_gate: None,
+            crate_level_only: false,
         }
     }
 
@@ -336,6 +339,7 @@ macro_rules! declare_tool_lint {
             future_incompatible: None,
             is_plugin: true,
             feature_gate: None,
+            crate_level_only: false,
         };
     );
 }
diff --git a/src/librustc_session/lint/builtin.rs b/src/librustc_session/lint/builtin.rs
index bb0d6e1a47e..e3444bb0e54 100644
--- a/src/librustc_session/lint/builtin.rs
+++ b/src/librustc_session/lint/builtin.rs
@@ -17,6 +17,7 @@ declare_lint! {
         reference: "issue #57571 <https://github.com/rust-lang/rust/issues/57571>",
         edition: None,
     };
+    crate_level_only
 }
 
 declare_lint! {
@@ -75,7 +76,8 @@ declare_lint! {
 declare_lint! {
     pub UNUSED_CRATE_DEPENDENCIES,
     Allow,
-    "crate dependencies that are never used"
+    "crate dependencies that are never used",
+    crate_level_only
 }
 
 declare_lint! {
@@ -166,7 +168,8 @@ declare_lint! {
 declare_lint! {
     pub UNKNOWN_CRATE_TYPES,
     Deny,
-    "unknown crate type found in `#[crate_type]` directive"
+    "unknown crate type found in `#[crate_type]` directive",
+    crate_level_only
 }
 
 declare_lint! {
@@ -339,7 +342,8 @@ declare_lint! {
 declare_lint! {
     pub ELIDED_LIFETIMES_IN_PATHS,
     Allow,
-    "hidden lifetime parameters in types are deprecated"
+    "hidden lifetime parameters in types are deprecated",
+    crate_level_only
 }
 
 declare_lint! {
@@ -459,6 +463,7 @@ declare_lint! {
         reference: "issue #52234 <https://github.com/rust-lang/rust/issues/52234>",
         edition: None,
     };
+    crate_level_only
 }
 
 declare_lint! {