summaryrefslogtreecommitdiffstats
path: root/src/test/ui/derives/clone-debug-dead-code.rs
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/derives/clone-debug-dead-code.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/derives/clone-debug-dead-code.rs')
-rw-r--r--src/test/ui/derives/clone-debug-dead-code.rs45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/derives/clone-debug-dead-code.rs b/src/test/ui/derives/clone-debug-dead-code.rs
new file mode 100644
index 000000000..ab49260c0
--- /dev/null
+++ b/src/test/ui/derives/clone-debug-dead-code.rs
@@ -0,0 +1,45 @@
+// Checks that derived implementations of Clone and Debug do not
+// contribute to dead code analysis (issue #84647).
+
+#![forbid(dead_code)]
+
+struct A { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Clone)]
+struct B { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Debug)]
+struct C { f: () }
+//~^ ERROR: field `f` is never read
+
+#[derive(Debug,Clone)]
+struct D { f: () }
+//~^ ERROR: field `f` is never read
+
+struct E { f: () }
+//~^ ERROR: field `f` is never read
+// Custom impl, still doesn't read f
+impl Clone for E {
+ fn clone(&self) -> Self {
+ Self { f: () }
+ }
+}
+
+struct F { f: () }
+// Custom impl that actually reads f
+impl Clone for F {
+ fn clone(&self) -> Self {
+ Self { f: self.f }
+ }
+}
+
+fn main() {
+ let _ = A { f: () };
+ let _ = B { f: () };
+ let _ = C { f: () };
+ let _ = D { f: () };
+ let _ = E { f: () };
+ let _ = F { f: () };
+}