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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/dst/dst-bad-assign.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/dst/dst-bad-assign.rs')
-rw-r--r--src/test/ui/dst/dst-bad-assign.rs41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/dst/dst-bad-assign.rs b/src/test/ui/dst/dst-bad-assign.rs
new file mode 100644
index 000000000..496e01ae0
--- /dev/null
+++ b/src/test/ui/dst/dst-bad-assign.rs
@@ -0,0 +1,41 @@
+// Forbid assignment into a dynamically sized type.
+
+struct Fat<T: ?Sized> {
+ f1: isize,
+ f2: &'static str,
+ ptr: T
+}
+
+#[derive(PartialEq,Eq)]
+struct Bar;
+
+#[derive(PartialEq,Eq)]
+struct Bar1 {
+ f: isize
+}
+
+trait ToBar {
+ fn to_bar(&self) -> Bar;
+ fn to_val(&self) -> isize;
+}
+
+impl ToBar for Bar1 {
+ fn to_bar(&self) -> Bar {
+ Bar
+ }
+ fn to_val(&self) -> isize {
+ self.f
+ }
+}
+
+pub fn main() {
+ // Assignment.
+ let f5: &mut Fat<dyn ToBar> = &mut Fat { f1: 5, f2: "some str", ptr: Bar1 {f :42} };
+ let z: Box<dyn ToBar> = Box::new(Bar1 {f: 36});
+ f5.ptr = Bar1 {f: 36};
+ //~^ ERROR mismatched types
+ //~| expected trait object `dyn ToBar`, found struct `Bar1`
+ //~| expected trait object `dyn ToBar`
+ //~| found struct `Bar1`
+ //~| ERROR the size for values of type
+}