fix: classify safe as a contextual kw

src/tools/rust-analyzer/crates/hir-ty/src/utils.rs

@@ -273,7 +273,7 @@ pub fn is_fn_unsafe_to_call(db: &dyn HirDatabase, func: FunctionId) -> bool {
                 !data.attrs.by_key(&sym::rustc_safe_intrinsic).exists()
             } else {
                 // Extern items without `safe` modifier are always unsafe
-                !db.function_data(func).is_safe()
+                !data.is_safe()
             }
         }
         _ => false,

src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/missing_unsafe.rs

@@ -554,7 +554,7 @@ fn rustc_deprecated_safe_2024() {
             r#"
 //- /ed2021.rs crate:ed2021 edition:2021
 #[rustc_deprecated_safe_2024]
-unsafe fn safe_fn() -> u8 {
+unsafe fn safe() -> u8 {
     0
 }
 //- /ed2024.rs crate:ed2024 edition:2024
@@ -564,7 +564,7 @@ unsafe fn not_safe() -> u8 {
 }
 //- /main.rs crate:main deps:ed2021,ed2024
 fn main() {
-    ed2021::safe_fn();
+    ed2021::safe();
     ed2024::not_safe();
   //^^^^^^^^^^^^^^^^^^💡 error: this operation is unsafe and requires an unsafe function or block
 }

src/tools/rust-analyzer/crates/parser/src/grammar/items.rs

@@ -135,8 +135,8 @@ pub(super) fn opt_item(p: &mut Parser<'_>, m: Marker) -> Result<(), Marker> {
         has_mods = true;
     }
 
-    if p.at(T![safe]) {
-        p.eat(T![safe]);
+    if p.at_contextual_kw(T![safe]) {
+        p.eat_contextual_kw(T![safe]);
         has_mods = true;
     }
 

src/tools/rust-analyzer/xtask/src/codegen/grammar/ast_src.rs

@@ -111,7 +111,7 @@ fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
 // keywords that are keywords only in specific parse contexts
 #[doc(alias = "WEAK_KEYWORDS")]
 const CONTEXTUAL_KEYWORDS: &[&str] =
-    &["macro_rules", "union", "default", "raw", "dyn", "auto", "yeet"];
+    &["macro_rules", "union", "default", "raw", "dyn", "auto", "yeet", "safe"];
 // keywords we use for special macro expansions
 const CONTEXTUAL_BUILTIN_KEYWORDS: &[&str] = &[
     "asm",