Merge DefPathData::VariantCtor and DefPathData::StructCtor

Author: petrochenkov

src/librustc/hir/map/def_collector.rs

@@ -160,10 +160,7 @@ impl<'a> visit::Visitor<'a> for DefCollector<'a> {
                 ItemKind::Struct(ref struct_def, _) | ItemKind::Union(ref struct_def, _) => {
                     // If this is a unit or tuple-like struct, register the constructor.
                     if let Some(ctor_hir_id) = struct_def.ctor_id() {
-                        this.create_def(ctor_hir_id,
-                                        DefPathData::StructCtor,
-                                        REGULAR_SPACE,
-                                        i.span);
+                        this.create_def(ctor_hir_id, DefPathData::Ctor, REGULAR_SPACE, i.span);
                     }
                 }
                 _ => {}
@@ -199,10 +196,7 @@ impl<'a> visit::Visitor<'a> for DefCollector<'a> {
                                   v.span);
         self.with_parent(def, |this| {
             if let Some(ctor_hir_id) = v.node.data.ctor_id() {
-                this.create_def(ctor_hir_id,
-                                DefPathData::VariantCtor,
-                                REGULAR_SPACE,
-                                v.span);
+                this.create_def(ctor_hir_id, DefPathData::Ctor, REGULAR_SPACE, v.span);
             }
             visit::walk_variant(this, v, g, item_id)
         });

src/librustc/hir/map/definitions.rs

@@ -366,10 +366,8 @@ pub enum DefPathData {
     EnumVariant(InternedString),
     /// A struct field
     Field(InternedString),
-    /// Implicit ctor for a unit or tuple-like struct
-    StructCtor,
-    /// Implicit ctor for a unit or tuple-like enum variant
-    VariantCtor,
+    /// Implicit ctor for a unit or tuple-like struct or enum variant.
+    Ctor,
     /// A constant expression (see {ast,hir}::AnonConst).
     AnonConst,
     /// An `impl Trait` type node
@@ -654,8 +652,7 @@ impl DefPathData {
             CrateRoot |
             Misc |
             ClosureExpr |
-            StructCtor |
-            VariantCtor |
+            Ctor |
             AnonConst |
             ImplTrait => None
         }
@@ -686,8 +683,7 @@ impl DefPathData {
             Impl => "{{impl}}",
             Misc => "{{misc}}",
             ClosureExpr => "{{closure}}",
-            StructCtor => "{{struct constructor}}",
-            VariantCtor => "{{variant constructor}}",
+            Ctor => "{{constructor}}",
             AnonConst => "{{constant}}",
             ImplTrait => "{{opaque}}",
         };

src/librustc/ty/instance.rs

@@ -150,8 +150,7 @@ impl<'tcx> InstanceDef<'tcx> {
             _ => return true
         };
         match tcx.def_key(def_id).disambiguated_data.data {
-            DefPathData::StructCtor | DefPathData::VariantCtor |
-            DefPathData::ClosureExpr => true,
+            DefPathData::Ctor | DefPathData::ClosureExpr => true,
             _ => false
         }
     }

src/librustc/ty/mod.rs

@@ -2960,8 +2960,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
         } else {
             let def_key = self.def_key(id);
             match def_key.disambiguated_data.data {
-                // The name of a `StructCtor` or `VariantCtor` is that of its parent.
-                hir_map::DefPathData::StructCtor | hir_map::DefPathData::VariantCtor =>
+                // The name of a constructor is that of its parent.
+                hir_map::DefPathData::Ctor =>
                     self.item_name(DefId {
                         krate: id.krate,
                         index: def_key.parent.unwrap()

src/librustc/ty/print/pretty.rs

@@ -285,13 +285,13 @@ pub trait PrettyPrinter<'gcx: 'tcx, 'tcx>:
         let mut cur_def_key = self.tcx().def_key(def_id);
         debug!("try_print_visible_def_path: cur_def_key={:?}", cur_def_key);
 
-        // For a UnitStruct or TupleStruct we want the name of its parent rather than <unnamed>.
+        // For a constructor we want the name of its parent rather than <unnamed>.
         match cur_def_key.disambiguated_data.data {
-            DefPathData::StructCtor | DefPathData::VariantCtor => {
+            DefPathData::Ctor => {
                 let parent = DefId {
                     krate: def_id.krate,
                     index: cur_def_key.parent
-                        .expect("DefPathData::StructCtor/VariantData missing a parent"),
+                        .expect("DefPathData::Ctor/VariantData missing a parent"),
                 };
 
                 cur_def_key = self.tcx().def_key(parent);
@@ -864,8 +864,7 @@ impl TyCtxt<'_, '_, '_> {
             DefPathData::AnonConst |
             DefPathData::ConstParam(..) |
             DefPathData::ClosureExpr |
-            DefPathData::VariantCtor |
-            DefPathData::StructCtor => Namespace::ValueNS,
+            DefPathData::Ctor => Namespace::ValueNS,
 
             DefPathData::MacroDef(..) => Namespace::MacroNS,
 
@@ -1029,7 +1028,7 @@ impl<F: fmt::Write> Printer<'gcx, 'tcx> for FmtPrinter<'_, 'gcx, 'tcx, F> {
 
         // Skip `::{{constructor}}` on tuple/unit structs.
         match disambiguated_data.data {
-            DefPathData::StructCtor | DefPathData::VariantCtor => return Ok(self),
+            DefPathData::Ctor => return Ok(self),
             _ => {}
         }
 

src/librustc/ty/util.rs

@@ -549,8 +549,8 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
 
     /// Returns `true` if this `DefId` refers to the implicit constructor for
     /// a tuple struct like `struct Foo(u32)`, and `false` otherwise.
-    pub fn is_struct_constructor(self, def_id: DefId) -> bool {
-        self.def_key(def_id).disambiguated_data.data == DefPathData::StructCtor
+    pub fn is_constructor(self, def_id: DefId) -> bool {
+        self.def_key(def_id).disambiguated_data.data == DefPathData::Ctor
     }
 
     /// Given the `DefId` of a fn or closure, returns the `DefId` of

src/librustc_codegen_utils/symbol_names.rs

@@ -522,7 +522,7 @@ impl Printer<'tcx, 'tcx> for SymbolPrinter<'_, 'tcx> {
 
         // Skip `::{{constructor}}` on tuple/unit structs.
         match disambiguated_data.data {
-            DefPathData::StructCtor => return Ok(self),
+            DefPathData::Ctor => return Ok(self),
             _ => {}
         }
 

src/librustc_metadata/decoder.rs

@@ -947,11 +947,11 @@ impl<'a, 'tcx> CrateMetadata {
             return Lrc::new([]);
         }
 
-        // The attributes for a tuple struct are attached to the definition, not the ctor;
+        // The attributes for a tuple struct/variant are attached to the definition, not the ctor;
         // we assume that someone passing in a tuple struct ctor is actually wanting to
         // look at the definition
         let def_key = self.def_key(node_id);
-        let item_id = if def_key.disambiguated_data.data == DefPathData::StructCtor {
+        let item_id = if def_key.disambiguated_data.data == DefPathData::Ctor {
             def_key.parent.unwrap()
         } else {
             node_id

src/librustc_mir/borrow_check/mod.rs

@@ -75,8 +75,8 @@ fn mir_borrowck<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, def_id: DefId) -> BorrowC
     // Return early if we are not supposed to use MIR borrow checker for this function.
     return_early = !tcx.has_attr(def_id, "rustc_mir") && !tcx.use_mir_borrowck();
 
-    if tcx.is_struct_constructor(def_id) {
-        // We are not borrow checking the automatically generated struct constructors
+    if tcx.is_constructor(def_id) {
+        // We are not borrow checking the automatically generated struct/variant constructors
         // because we want to accept structs such as this (taken from the `linked-hash-map`
         // crate):
         // ```rust

src/librustc_mir/borrow_check/nll/type_check/mod.rs

@@ -2685,8 +2685,8 @@ impl MirPass for TypeckMir {
             return;
         }
 
-        if tcx.is_struct_constructor(def_id) {
-            // We just assume that the automatically generated struct constructors are
+        if tcx.is_constructor(def_id) {
+            // We just assume that the automatically generated struct/variant constructors are
             // correct. See the comment in the `mir_borrowck` implementation for an
             // explanation why we need this.
             return;