Merge 1.70 into proxmox/bookworm

[rustc.git] / tests / ui / internal-lints / rustc_pass_by_value_self.rs

diff --git a/tests/ui/internal-lints/rustc_pass_by_value_self.rs b/tests/ui/internal-lints/rustc_pass_by_value_self.rs
new file mode 100644 (file)
index 0000000..6ce67dc
--- /dev/null
+++ b/tests/ui/internal-lints/rustc_pass_by_value_self.rs
@@ -0,0 +1,54 @@
+// compile-flags: -Z unstable-options
+// NOTE: This test doesn't actually require `fulldeps`
+// so we could instead use it as a `ui` test.
+//
+// Considering that all other `internal-lints` are tested here
+// this seems like the cleaner solution though.
+#![feature(rustc_attrs)]
+#![deny(rustc::pass_by_value)]
+#![allow(unused)]
+
+#[rustc_pass_by_value]
+struct TyCtxt<'tcx> {
+    inner: &'tcx (),
+}
+
+impl<'tcx> TyCtxt<'tcx> {
+    fn by_value(self) {} // OK
+    fn by_ref(&self) {} //~ ERROR passing `TyCtxt<'tcx>` by reference
+}
+
+struct TyS<'tcx> {
+    inner: &'tcx (),
+}
+
+#[rustc_pass_by_value]
+type Ty<'tcx> = &'tcx TyS<'tcx>;
+
+impl<'tcx> TyS<'tcx> {
+    fn by_value(self: Ty<'tcx>) {}
+    fn by_ref(self: &Ty<'tcx>) {} //~ ERROR passing `Ty<'tcx>` by reference
+}
+
+#[rustc_pass_by_value]
+struct Foo;
+
+impl Foo {
+    fn with_ref(&self) {} //~ ERROR passing `Foo` by reference
+}
+
+#[rustc_pass_by_value]
+struct WithParameters<T, const N: usize, M = u32> {
+    slice: [T; N],
+    m: M,
+}
+
+impl<T> WithParameters<T, 1> {
+    fn with_ref(&self) {} //~ ERROR passing `WithParameters<T, 1>` by reference
+}
+
+impl<T> WithParameters<T, 1, u8> {
+    fn with_ref(&self) {} //~ ERROR passing `WithParameters<T, 1, u8>` by reference
+}
+
+fn main() {}