dead-code lint: say "constructed" for structs

src/librustc/middle/dead.rs

@@ -554,12 +554,16 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
                 hir::ItemKind::Impl(..) => self.tcx.sess.codemap().def_span(item.span),
                 _ => item.span,
             };
+            let participle = match item.node {
+                hir::ItemKind::Struct(..) => "constructed", // Issue #52325
+                _ => "used"
+            };
             self.warn_dead_code(
                 item.id,
                 span,
                 item.name,
                 item.node.descriptive_variant(),
-                "used",
+                participle,
             );
         } else {
             // Only continue if we didn't warn

src/test/compile-fail/lint-dead-code-1.rs

@@ -19,7 +19,7 @@
 pub use foo2::Bar2;
 
 mod foo {
-    pub struct Bar; //~ ERROR: struct is never used
+    pub struct Bar; //~ ERROR: struct is never constructed
 }
 
 mod foo2 {
@@ -42,7 +42,7 @@ const CONST_USED_IN_ENUM_DISCRIMINANT: isize = 11;
 
 pub type typ = *const UsedStruct4;
 pub struct PubStruct;
-struct PrivStruct; //~ ERROR: struct is never used
+struct PrivStruct; //~ ERROR: struct is never constructed
 struct UsedStruct1 {
     #[allow(dead_code)]
     x: isize

src/test/compile-fail/lint-dead-code-3.rs

@@ -20,7 +20,7 @@ extern {
     pub fn extern_foo();
 }
 
-struct Foo; //~ ERROR: struct is never used
+struct Foo; //~ ERROR: struct is never constructed
 impl Foo {
     fn foo(&self) { //~ ERROR: method is never used
         bar()

src/test/ui/span/macro-span-replacement.rs

@@ -14,7 +14,7 @@
 
 macro_rules! m {
     ($a:tt $b:tt) => {
-        $b $a; //~ WARN struct is never used
+        $b $a; //~ WARN struct is never constructed
     }
 }
 

src/test/ui/span/macro-span-replacement.stderr

@@ -1,7 +1,7 @@
-warning: struct is never used: `S`
+warning: struct is never constructed: `S`
   --> $DIR/macro-span-replacement.rs:17:14
    |
-LL |         $b $a; //~ WARN struct is never used
+LL |         $b $a; //~ WARN struct is never constructed
    |              ^
 ...
 LL |     m!(S struct);

src/test/ui/span/unused-warning-point-at-signature.rs

@@ -19,7 +19,7 @@ enum Enum { //~ WARN enum is never used
     D,
 }
 
-struct Struct { //~ WARN struct is never used
+struct Struct { //~ WARN struct is never constructed
     a: usize,
     b: usize,
     c: usize,

src/test/ui/span/unused-warning-point-at-signature.stderr

@@ -11,10 +11,10 @@ LL | #![warn(unused)]
    |         ^^^^^^
    = note: #[warn(dead_code)] implied by #[warn(unused)]
 
-warning: struct is never used: `Struct`
+warning: struct is never constructed: `Struct`
   --> $DIR/unused-warning-point-at-signature.rs:22:1
    |
-LL | struct Struct { //~ WARN struct is never used
+LL | struct Struct { //~ WARN struct is never constructed
    | ^^^^^^^^^^^^^
 
 warning: function is never used: `func`