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-rw-r--r--compiler/rustc_hir/src/def.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_hir/src/def.rs b/compiler/rustc_hir/src/def.rs
index e8cecb1930f..2662f5661ba 100644
--- a/compiler/rustc_hir/src/def.rs
+++ b/compiler/rustc_hir/src/def.rs
@@ -113,6 +113,9 @@ pub enum DefKind {
     InlineConst,
     /// Opaque type, aka `impl Trait`.
     OpaqueTy,
+    /// A field in a struct, enum or union. e.g.
+    /// - `bar` in `struct Foo { bar: u8 }`
+    /// - `Foo::Bar::0` in `enum Foo { Bar(u8) }`
     Field,
     /// Lifetime parameter: the `'a` in `struct Foo<'a> { ... }`
     LifetimeParam,