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-rw-r--r--src/etc/check_missing_items.py2
-rw-r--r--src/librustdoc/json/conversions.rs31
-rw-r--r--src/librustdoc/json/mod.rs2
-rw-r--r--src/rustdoc-json-types/lib.rs17
-rw-r--r--src/test/rustdoc-json/fn_pointer/header.rs5
-rw-r--r--src/test/rustdoc-json/fns/header.rs20
-rw-r--r--src/test/rustdoc-json/methods/header.rs24
7 files changed, 85 insertions, 16 deletions
diff --git a/src/etc/check_missing_items.py b/src/etc/check_missing_items.py
index c7ca0134f9c..7572b8c6f4a 100644
--- a/src/etc/check_missing_items.py
+++ b/src/etc/check_missing_items.py
@@ -108,7 +108,7 @@ def check_type(ty):
     elif ty["kind"] == "function_pointer":
         for param in ty["inner"]["generic_params"]:
             check_generic_param(param)
-        check_decl(ty["inner"]["inner"])
+        check_decl(ty["inner"]["decl"])
     elif ty["kind"] == "qualified_path":
         check_type(ty["inner"]["self_type"])
         check_type(ty["inner"]["trait"])
diff --git a/src/librustdoc/json/conversions.rs b/src/librustdoc/json/conversions.rs
index e021faa5041..af44ab9868e 100644
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@@ -225,15 +225,22 @@ crate fn from_ctor_kind(struct_type: CtorKind) -> StructType {
     }
 }
 
-fn stringify_header(header: &rustc_hir::FnHeader) -> String {
-    let mut s = String::from(header.unsafety.prefix_str());
-    if header.asyncness == rustc_hir::IsAsync::Async {
-        s.push_str("async ")
+crate fn from_fn_header(header: &rustc_hir::FnHeader) -> Vec<Modifiers> {
+    let mut v = Vec::new();
+
+    if let rustc_hir::Unsafety::Unsafe = header.unsafety {
+        v.push(Modifiers::Unsafe);
+    }
+
+    if let rustc_hir::IsAsync::Async = header.asyncness {
+        v.push(Modifiers::Async);
     }
-    if header.constness == rustc_hir::Constness::Const {
-        s.push_str("const ")
+
+    if let rustc_hir::Constness::Const = header.constness {
+        v.push(Modifiers::Const);
     }
-    s
+
+    v
 }
 
 impl From<clean::Function> for Function {
@@ -242,7 +249,7 @@ impl From<clean::Function> for Function {
         Function {
             decl: decl.into(),
             generics: generics.into(),
-            header: stringify_header(&header),
+            header: from_fn_header(&header),
             abi: header.abi.to_string(),
         }
     }
@@ -364,7 +371,11 @@ impl From<clean::BareFunctionDecl> for FunctionPointer {
     fn from(bare_decl: clean::BareFunctionDecl) -> Self {
         let clean::BareFunctionDecl { unsafety, generic_params, decl, abi } = bare_decl;
         FunctionPointer {
-            is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
+            header: if let rustc_hir::Unsafety::Unsafe = unsafety {
+                vec![Modifiers::Unsafe]
+            } else {
+                vec![]
+            },
             generic_params: generic_params.into_iter().map(Into::into).collect(),
             decl: decl.into(),
             abi: abi.to_string(),
@@ -439,7 +450,7 @@ crate fn from_function_method(function: clean::Function, has_body: bool) -> Meth
     Method {
         decl: decl.into(),
         generics: generics.into(),
-        header: stringify_header(&header),
+        header: from_fn_header(&header),
         abi: header.abi.to_string(),
         has_body,
     }
diff --git a/src/librustdoc/json/mod.rs b/src/librustdoc/json/mod.rs
index 876b1b56dee..b31276c9dcb 100644
--- a/src/librustdoc/json/mod.rs
+++ b/src/librustdoc/json/mod.rs
@@ -243,7 +243,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                     )
                 })
                 .collect(),
-            format_version: 3,
+            format_version: 4,
         };
         let mut p = self.out_path.clone();
         p.push(output.index.get(&output.root).unwrap().name.clone().unwrap());
diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs
index f4b8dc9a3ad..790f9d62d8a 100644
--- a/src/rustdoc-json-types/lib.rs
+++ b/src/rustdoc-json-types/lib.rs
@@ -281,11 +281,20 @@ pub enum StructType {
     Unit,
 }
 
+#[non_exhaustive]
+#[serde(rename_all = "snake_case")]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub enum Modifiers {
+    Const,
+    Unsafe,
+    Async,
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub struct Function {
     pub decl: FnDecl,
     pub generics: Generics,
-    pub header: String,
+    pub header: Vec<Modifiers>,
     pub abi: String,
 }
 
@@ -293,7 +302,7 @@ pub struct Function {
 pub struct Method {
     pub decl: FnDecl,
     pub generics: Generics,
-    pub header: String,
+    pub header: Vec<Modifiers>,
     pub abi: String,
     pub has_body: bool,
 }
@@ -404,9 +413,9 @@ pub enum Type {
 
 #[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
 pub struct FunctionPointer {
-    pub is_unsafe: bool,
-    pub generic_params: Vec<GenericParamDef>,
     pub decl: FnDecl,
+    pub generic_params: Vec<GenericParamDef>,
+    pub header: Vec<Modifiers>,
     pub abi: String,
 }
 
diff --git a/src/test/rustdoc-json/fn_pointer/header.rs b/src/test/rustdoc-json/fn_pointer/header.rs
new file mode 100644
index 00000000000..a5038e0cd2a
--- /dev/null
+++ b/src/test/rustdoc-json/fn_pointer/header.rs
@@ -0,0 +1,5 @@
+// @has header.json "$.index[*][?(@.name=='FnPointer')].inner.type.inner.header" "[]"
+pub type FnPointer = fn();
+
+// @has - "$.index[*][?(@.name=='UnsafePointer')].inner.type.inner.header" '["unsafe"]'
+pub type UnsafePointer = unsafe fn();
diff --git a/src/test/rustdoc-json/fns/header.rs b/src/test/rustdoc-json/fns/header.rs
new file mode 100644
index 00000000000..fb4f89db267
--- /dev/null
+++ b/src/test/rustdoc-json/fns/header.rs
@@ -0,0 +1,20 @@
+// edition:2018
+
+// @has header.json "$.index[*][?(@.name=='nothing_fn')].inner.header" "[]"
+pub fn nothing_fn() {}
+
+// @has - "$.index[*][?(@.name=='const_fn')].inner.header" '["const"]'
+pub const fn const_fn() {}
+
+// @has - "$.index[*][?(@.name=='async_fn')].inner.header" '["async"]'
+pub async fn async_fn() {}
+
+// @count - "$.index[*][?(@.name=='async_unsafe_fn')].inner.header[*]" 2
+// @has - "$.index[*][?(@.name=='async_unsafe_fn')].inner.header[*]" '"async"'
+// @has - "$.index[*][?(@.name=='async_unsafe_fn')].inner.header[*]" '"unsafe"'
+pub async unsafe fn async_unsafe_fn() {}
+
+// @count - "$.index[*][?(@.name=='const_unsafe_fn')].inner.header[*]" 2
+// @has - "$.index[*][?(@.name=='const_unsafe_fn')].inner.header[*]" '"const"'
+// @has - "$.index[*][?(@.name=='const_unsafe_fn')].inner.header[*]" '"unsafe"'
+pub const unsafe fn const_unsafe_fn() {}
diff --git a/src/test/rustdoc-json/methods/header.rs b/src/test/rustdoc-json/methods/header.rs
new file mode 100644
index 00000000000..27a6ec04730
--- /dev/null
+++ b/src/test/rustdoc-json/methods/header.rs
@@ -0,0 +1,24 @@
+// edition:2018
+
+pub struct Foo;
+
+impl Foo {
+    // @has header.json "$.index[*][?(@.name=='nothing_meth')].inner.header" "[]"
+    pub fn nothing_meth() {}
+
+    // @has - "$.index[*][?(@.name=='const_meth')].inner.header" '["const"]'
+    pub const fn const_meth() {}
+
+    // @has - "$.index[*][?(@.name=='async_meth')].inner.header" '["async"]'
+    pub async fn async_meth() {}
+
+    // @count - "$.index[*][?(@.name=='async_unsafe_meth')].inner.header[*]" 2
+    // @has - "$.index[*][?(@.name=='async_unsafe_meth')].inner.header[*]" '"async"'
+    // @has - "$.index[*][?(@.name=='async_unsafe_meth')].inner.header[*]" '"unsafe"'
+    pub async unsafe fn async_unsafe_meth() {}
+
+    // @count - "$.index[*][?(@.name=='const_unsafe_meth')].inner.header[*]" 2
+    // @has - "$.index[*][?(@.name=='const_unsafe_meth')].inner.header[*]" '"const"'
+    // @has - "$.index[*][?(@.name=='const_unsafe_meth')].inner.header[*]" '"unsafe"'
+    pub const unsafe fn const_unsafe_meth() {}
+}
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-04-25 13:11:04 +0000