add ty::Variant type

Author: zhamlin

compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs

@@ -373,6 +373,8 @@ fn push_debuginfo_type_name<'tcx>(
                 t
             );
         }
+
+        ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
     }
 
     /// MSVC names enums differently than other platforms so that the debugging visualization

compiler/rustc_const_eval/src/const_eval/mod.rs

@@ -129,6 +129,7 @@ fn const_to_valtree_inner<'tcx>(
         | ty::Closure(..)
         | ty::Generator(..)
         | ty::GeneratorWitness(..) => None,
+        ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
     }
 }
 

compiler/rustc_const_eval/src/interpret/intrinsics.rs

@@ -100,6 +100,7 @@ crate fn eval_nullary_intrinsic<'tcx>(
             | ty::Never
             | ty::Tuple(_)
             | ty::Error(_) => ConstValue::from_machine_usize(0u64, &tcx),
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         },
         other => bug!("`{}` is not a zero arg intrinsic", other),
     })

compiler/rustc_const_eval/src/interpret/intrinsics/type_name.rs

@@ -65,6 +65,7 @@ impl<'tcx> Printer<'tcx> for AbsolutePathPrinter<'tcx> {
             ty::Foreign(def_id) => self.print_def_path(def_id, &[]),
 
             ty::GeneratorWitness(_) => bug!("type_name: unexpected `GeneratorWitness`"),
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
     }
 

compiler/rustc_const_eval/src/interpret/validity.rs

@@ -612,6 +612,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValidityVisitor<'rt, 'mir, '
             | ty::Opaque(..)
             | ty::Projection(..)
             | ty::GeneratorWitness(..) => bug!("Encountered invalid type {:?}", ty),
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
     }
 

compiler/rustc_infer/src/infer/canonical/canonicalizer.rs

@@ -406,6 +406,7 @@ impl<'cx, 'tcx> TypeFolder<'tcx> for Canonicalizer<'cx, 'tcx> {
                     t
                 }
             }
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
     }
 

compiler/rustc_infer/src/infer/freshen.rs

@@ -218,6 +218,8 @@ impl<'a, 'tcx> TypeFolder<'tcx> for TypeFreshener<'a, 'tcx> {
             | ty::Opaque(..) => t.super_fold_with(self),
 
             ty::Placeholder(..) | ty::Bound(..) => bug!("unexpected type {:?}", t),
+
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
     }
 

compiler/rustc_infer/src/infer/outlives/components.rs

@@ -187,6 +187,7 @@ fn compute_components(
                 // themselves can be readily identified.
                 compute_components_recursive(tcx, ty.into(), out, visited);
             }
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
 }
 

compiler/rustc_lint/src/types.rs

@@ -1130,6 +1130,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> {
             | ty::GeneratorWitness(..)
             | ty::Placeholder(..)
             | ty::FnDef(..) => bug!("unexpected type in foreign function: {:?}", ty),
+            ty::Variant(..) => unimplemented!("TODO(zhamlin)"),
         }
     }
 

compiler/rustc_middle/src/ty/context.rs

@@ -1932,6 +1932,7 @@ impl<'tcx> TyCtxt<'tcx> {
                     fmt,
                     self.0,
                     Adt,
+                    Variant,
                     Array,
                     Slice,
                     RawPtr,