Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/tests/ui/print_type_sizes/generics.rs b/tests/ui/print_type_sizes/generics.rs
new file mode 100644
index 000000000..05097087d
--- /dev/null
+++ b/tests/ui/print_type_sizes/generics.rs
@@ -0,0 +1,51 @@
+// compile-flags: -Z print-type-sizes --crate-type=lib
+// build-pass
+// ignore-pass
+// ^-- needed because `--pass check` does not emit the output needed.
+//     FIXME: consider using an attribute instead of side-effects.
+
+// This file illustrates how generics are handled: types have to be
+// monomorphized, in the MIR of the original function in which they
+// occur, to have their size reported.
+
+#[derive(Copy, Clone)]
+pub struct Pair<T> {
+    _car: T,
+    _cdr: T,
+}
+
+impl<T> Pair<T> {
+    fn new(a: T, d: T) -> Self {
+        Pair {
+            _car: a,
+            _cdr: d,
+        }
+    }
+}
+
+#[derive(Copy, Clone)]
+pub struct SevenBytes([u8; 7]);
+pub struct FiftyBytes([u8; 50]);
+
+pub struct ZeroSized;
+
+impl SevenBytes {
+    fn new() -> Self { SevenBytes([0; 7]) }
+}
+
+impl FiftyBytes {
+    fn new() -> Self { FiftyBytes([0; 50]) }
+}
+
+pub fn f1<T:Copy>(x: T) {
+    let _v: Pair<T> = Pair::new(x, x);
+    let _v2: Pair<FiftyBytes> =
+        Pair::new(FiftyBytes::new(), FiftyBytes::new());
+}
+
+pub fn start() {
+    let _b: Pair<u8> = Pair::new(0, 0);
+    let _s: Pair<SevenBytes> = Pair::new(SevenBytes::new(), SevenBytes::new());
+    let ref _z: ZeroSized = ZeroSized;
+    f1::<SevenBytes>(SevenBytes::new());
+}