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compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -1545,7 +1545,7 @@ impl EnumMemberDescriptionFactory<'ll, 'tcx> {
                     //   {name} discriminant;
                     // }
                     // ```
-                    // The natvis in `intrinsic.nativs` then matches on `this.discriminant` to
+                    // The natvis in `intrinsic.natvis` then matches on `this.discriminant` to
                     // determine which variant is active and then displays it.
                     let enum_layout = self.layout;
                     let offset = enum_layout.fields.offset(tag_field);

src/test/debuginfo/msvc-pretty-enums.rs

@@ -1,10 +1,14 @@
 // only-cdb
+// ignore-tidy-linelength
 // compile-flags:-g
 
 // cdb-command: g
 
 // Note: The natvis used to visualize niche-layout enums don't work correctly in cdb
-//       so the best we can do is to make sure we are generating the right debuginfo
+//       so the best we can do is to make sure we are generating the right debuginfo.
+//       Therefore, we use the `!` [format specifier](https://docs.microsoft.com/en-us/visualstudio/debugger/format-specifiers-in-cpp?view=vs-2019#BKMK_Visual_Studio_2012_format_specifiers)
+//       to disable the natvis for a given expression. We also provide the `-r2` flag
+//       to expand the expression 2 levels.
 
 // cdb-command: dx -r2 a,!
 // cdb-check:a,!              [Type: enum$<core::option::Option<enum$<msvc_pretty_enums::CStyleEnum> >, 2, 16, Some>]