prevent TrivialClone implementations from appearing in rustdoc output

Author: joboet

compiler/rustc_builtin_macros/src/deriving/bounds.rs

@@ -24,6 +24,7 @@ pub(crate) fn expand_deriving_copy(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand(cx, mitem, item, push);
@@ -48,6 +49,7 @@ pub(crate) fn expand_deriving_const_param_ty(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand(cx, mitem, item, push);
@@ -63,6 +65,7 @@ pub(crate) fn expand_deriving_const_param_ty(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand(cx, mitem, item, push);
@@ -87,6 +90,7 @@ pub(crate) fn expand_deriving_unsized_const_param_ty(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand(cx, mitem, item, push);

compiler/rustc_builtin_macros/src/deriving/clone.rs

@@ -82,6 +82,9 @@ pub(crate) fn expand_deriving_clone(
             associated_types: Vec::new(),
             is_const,
             safety: Safety::Unsafe(DUMMY_SP),
+            // `TrivialClone` is not part of an API guarantee, so it shouldn't
+            // appear in rustdoc output.
+            document: false,
         };
 
         trivial_def.expand_ext(cx, mitem, item, push, true);
@@ -107,6 +110,7 @@ pub(crate) fn expand_deriving_clone(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand_ext(cx, mitem, item, push, is_simple)

compiler/rustc_builtin_macros/src/deriving/cmp/eq.rs

@@ -44,6 +44,7 @@ pub(crate) fn expand_deriving_eq(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
     trait_def.expand_ext(cx, mitem, item, push, true)
 }

compiler/rustc_builtin_macros/src/deriving/cmp/ord.rs

@@ -35,6 +35,7 @@ pub(crate) fn expand_deriving_ord(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     trait_def.expand(cx, mitem, item, push)

compiler/rustc_builtin_macros/src/deriving/cmp/partial_eq.rs

@@ -85,6 +85,7 @@ pub(crate) fn expand_deriving_partial_eq(
         associated_types: Vec::new(),
         is_const: false,
         safety: Safety::Default,
+        document: true,
     };
     structural_trait_def.expand(cx, mitem, item, push);
 
@@ -112,6 +113,7 @@ pub(crate) fn expand_deriving_partial_eq(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
     trait_def.expand(cx, mitem, item, push)
 }

compiler/rustc_builtin_macros/src/deriving/cmp/partial_ord.rs

@@ -65,6 +65,7 @@ pub(crate) fn expand_deriving_partial_ord(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
     trait_def.expand(cx, mitem, item, push)
 }

compiler/rustc_builtin_macros/src/deriving/debug.rs

@@ -42,6 +42,7 @@ pub(crate) fn expand_deriving_debug(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
     trait_def.expand(cx, mitem, item, push)
 }

compiler/rustc_builtin_macros/src/deriving/default.rs

@@ -51,6 +51,7 @@ pub(crate) fn expand_deriving_default(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
     trait_def.expand(cx, mitem, item, push)
 }

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -224,6 +224,9 @@ pub(crate) struct TraitDef<'a> {
 
     /// The safety of the `impl`.
     pub safety: Safety,
+
+    /// Whether the added `impl` should appear in rustdoc output.
+    pub document: bool,
 }
 
 pub(crate) struct MethodDef<'a> {
@@ -787,7 +790,11 @@ impl<'a> TraitDef<'a> {
         let path = cx.path_all(self.span, false, vec![type_ident], self_params);
         let self_type = cx.ty_path(path);
 
-        let attrs = thin_vec![cx.attr_word(sym::automatically_derived, self.span),];
+        let mut attrs = thin_vec![cx.attr_word(sym::automatically_derived, self.span),];
+        if !self.document {
+            attrs.push(cx.attr_nested_word(sym::doc, sym::hidden, self.span));
+        }
+
         let opt_trait_ref = Some(trait_ref);
 
         cx.item(

compiler/rustc_builtin_macros/src/deriving/hash.rs

@@ -42,6 +42,7 @@ pub(crate) fn expand_deriving_hash(
         associated_types: Vec::new(),
         is_const,
         safety: Safety::Default,
+        document: true,
     };
 
     hash_trait_def.expand(cx, mitem, item, push);