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-rw-r--r--compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
index 0f8dc06f4ca..7b4b0821c4b 100644
--- a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
+++ b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
@@ -238,6 +238,10 @@ pub fn push_debuginfo_type_name<'tcx>(
         }
     }
 
+    /// MSVC names enums differently than other platforms so that the debugging visualization
+    // format (natvis) is able to understand enums and render the active variant correctly in the
+    // debugger. For more information, look in `src/etc/natvis/intrinsic.natvis` and
+    // `EnumMemberDescriptionFactor::create_member_descriptions`.
     fn msvc_enum_fallback(
         tcx: TyCtxt<'tcx>,
         ty: Ty<'tcx>,