Rollup merge of #102406 - mejrs:missing_copy, r=wesleywiser

Make `missing_copy_implementations` more cautious

- Fixes https://github.com/rust-lang/rust/issues/98348
- Also makes the lint not fire on large types and types containing raw pointers. Thoughts?

1 files changed, 35 insertions, 0 deletions

diff --git a/src/test/ui/lint/lint-missing-copy-implementations-allow.rs b/src/test/ui/lint/lint-missing-copy-implementations-allow.rs
new file mode 100644
index 00000000000..051a905aed6
--- /dev/null
+++ b/src/test/ui/lint/lint-missing-copy-implementations-allow.rs
@@ -0,0 +1,35 @@
+// check-pass
+#![deny(missing_copy_implementations)]
+
+// Don't recommend implementing Copy on something stateful like an iterator.
+pub struct MyIterator {
+    num: u8,
+}
+
+impl Iterator for MyIterator {
+    type Item = u8;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        todo!()
+    }
+}
+
+pub struct Handle {
+    inner: *mut (),
+}
+
+pub struct Handle2 {
+    inner: *const (),
+}
+
+pub enum MaybeHandle {
+    Ptr(*mut ()),
+}
+
+pub union UnionHandle {
+    ptr: *mut (),
+}
+
+pub struct Array([u8; 2048]);
+
+fn main() {}